From 8c2dd12adbc3b30c079554c6073663d0649d055d Mon Sep 17 00:00:00 2001
From: Duo Zhang <zhangduo@apache.org>
Date: Thu, 6 Oct 2022 18:17:34 +0800
Subject: [PATCH] HBASE-27401 Clean up current broken 'n's in our javadoc
 (#4812)

Signed-off-by: Andrew Purtell <apurtell@apache.org>
(cherry picked from commit 63cdd026f08cdde6ac0fde1342ffd050e8e02441)

Conflicts:
	hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupManager.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionLocation.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueExcludeFilter.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityClient.java
	hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java
	hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java
	hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestReplication.java
	hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/TestRemoteTable.java
	hbase-rsgroup/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupInfoManager.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/HBaseServerBase.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobUtils.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/replication/HBaseReplicationEndpoint.java
	hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSource.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtil.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
	hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestBulkLoadHFilesSplitRecovery.java
	hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftUtilities.java
---
 ...anOutOneBlockAsyncDFSOutputSaslHelper.java |   2 +-
 .../hadoop/hbase/AsyncMetaTableAccessor.java  |  34 ++--
 .../org/apache/hadoop/hbase/ClusterId.java    |   7 +-
 .../apache/hadoop/hbase/ClusterStatus.java    |   2 +-
 .../hadoop/hbase/HColumnDescriptor.java       |  10 +-
 .../org/apache/hadoop/hbase/HRegionInfo.java  |  96 +++++-----
 .../apache/hadoop/hbase/HRegionLocation.java  |   6 +-
 .../apache/hadoop/hbase/HTableDescriptor.java |  12 +-
 .../hadoop/hbase/MetaTableAccessor.java       |   2 +-
 .../NotAllMetaRegionsOnlineException.java     |   3 +-
 .../org/apache/hadoop/hbase/ServerLoad.java   |   2 +-
 .../apache/hadoop/hbase/ServerMetrics.java    |   2 +-
 .../org/apache/hadoop/hbase/client/Admin.java |  27 +--
 .../apache/hadoop/hbase/client/Append.java    |  19 +-
 .../hadoop/hbase/client/AsyncAdmin.java       |  23 +--
 .../hbase/client/AsyncConnectionImpl.java     |   2 +-
 .../hadoop/hbase/client/AsyncProcess.java     |   2 +-
 .../hadoop/hbase/client/ClientScanner.java    |   2 +-
 .../hbase/client/ClusterConnection.java       |   6 +-
 .../hbase/client/ColumnFamilyDescriptor.java  |   2 +-
 .../client/ColumnFamilyDescriptorBuilder.java |  17 +-
 .../client/ConnectionImplementation.java      |   2 +-
 .../apache/hadoop/hbase/client/Delete.java    |  13 +-
 .../org/apache/hadoop/hbase/client/Get.java   |  19 +-
 .../hadoop/hbase/client/HBaseAdmin.java       |   6 +-
 .../hbase/client/HTableMultiplexer.java       |   7 +-
 .../client/ImmutableHColumnDescriptor.java    |   2 +-
 .../hbase/client/ImmutableHRegionInfo.java    |   2 +-
 .../client/ImmutableHTableDescriptor.java     |   2 +-
 .../apache/hadoop/hbase/client/Increment.java |  10 +-
 .../hadoop/hbase/client/MasterCallable.java   |   2 +-
 .../apache/hadoop/hbase/client/MetaCache.java |   6 +-
 .../hadoop/hbase/client/MultiAction.java      |   5 +-
 .../hadoop/hbase/client/MultiResponse.java    |   6 +-
 .../hbase/client/MutableRegionInfo.java       |   7 +-
 .../apache/hadoop/hbase/client/Mutation.java  |  46 ++---
 .../apache/hadoop/hbase/client/Operation.java |   2 +-
 .../hbase/client/OperationWithAttributes.java |   2 +-
 .../client/PreemptiveFastFailInterceptor.java |   9 +-
 .../org/apache/hadoop/hbase/client/Put.java   |  13 +-
 .../org/apache/hadoop/hbase/client/Query.java |   9 +-
 .../client/RegionAdminServiceCallable.java    |   2 +-
 .../hbase/client/RegionInfoDisplay.java       |  10 +-
 .../hbase/client/RegionReplicaUtil.java       |   5 +-
 .../hbase/client/RegionServerCallable.java    |   2 +-
 .../apache/hadoop/hbase/client/Result.java    |  17 +-
 .../hadoop/hbase/client/ResultScanner.java    |   2 +-
 .../client/RetryingCallerInterceptor.java     |   8 +-
 .../RetryingCallerInterceptorContext.java     |  10 +-
 .../hadoop/hbase/client/RowMutations.java     |   4 +-
 .../org/apache/hadoop/hbase/client/Scan.java  | 105 ++++++-----
 .../hbase/client/SecureBulkLoadClient.java    |   8 +-
 .../org/apache/hadoop/hbase/client/Table.java |  19 +-
 .../hadoop/hbase/client/TableDescriptor.java  |   2 +-
 .../hbase/client/TableDescriptorBuilder.java  |  13 +-
 .../hadoop/hbase/client/TableState.java       |  10 +-
 .../hbase/client/UnmodifyableHRegionInfo.java |   2 +-
 .../client/backoff/ServerStatistics.java      |   2 +-
 .../client/metrics/ServerSideScanMetrics.java |  18 +-
 .../client/replication/ReplicationAdmin.java  |  17 +-
 .../hbase/coprocessor/ColumnInterpreter.java  |  43 ++---
 .../coprocessor/CoprocessorException.java     |   2 +-
 .../exceptions/ClientExceptionsUtil.java      |   2 +-
 .../FailedSanityCheckException.java           |   6 +-
 .../hadoop/hbase/filter/BinaryComparator.java |   8 +-
 .../hbase/filter/BinaryPrefixComparator.java  |   8 +-
 .../hadoop/hbase/filter/BitComparator.java    |   7 +-
 .../hbase/filter/ColumnPaginationFilter.java  |  13 +-
 .../hbase/filter/ColumnRangeFilter.java       |   4 +-
 .../hbase/filter/ColumnValueFilter.java       |   4 +-
 .../hadoop/hbase/filter/CompareFilter.java    |   7 +-
 .../hbase/filter/DependentColumnFilter.java   |   8 +-
 .../hadoop/hbase/filter/FamilyFilter.java     |   3 +-
 .../apache/hadoop/hbase/filter/Filter.java    |   9 +-
 .../hadoop/hbase/filter/FilterBase.java       |   6 +-
 .../hadoop/hbase/filter/FilterList.java       |  13 +-
 .../hadoop/hbase/filter/FilterListBase.java   |   2 +-
 ...FirstKeyValueMatchingQualifiersFilter.java |   3 +-
 .../hadoop/hbase/filter/FuzzyRowFilter.java   |  11 +-
 .../hbase/filter/InclusiveStopFilter.java     |   4 +-
 .../hadoop/hbase/filter/KeyOnlyFilter.java    |   3 +-
 .../hadoop/hbase/filter/LongComparator.java   |   4 +-
 .../filter/MultipleColumnPrefixFilter.java    |   4 +-
 .../hadoop/hbase/filter/NullComparator.java   |   8 +-
 .../hadoop/hbase/filter/PageFilter.java       |   3 +-
 .../hadoop/hbase/filter/RandomRowFilter.java  |   8 +-
 .../hbase/filter/RegexStringComparator.java   |   8 +-
 .../apache/hadoop/hbase/filter/RowFilter.java |   3 +-
 .../SingleColumnValueExcludeFilter.java       |  12 +-
 .../hbase/filter/SingleColumnValueFilter.java |  13 +-
 .../hadoop/hbase/filter/SkipFilter.java       |   3 +-
 .../hbase/filter/SubstringComparator.java     |   8 +-
 .../hadoop/hbase/filter/TimestampsFilter.java |   2 +-
 .../hadoop/hbase/filter/ValueFilter.java      |   3 +-
 .../hadoop/hbase/ipc/CellBlockBuilder.java    |   7 +-
 .../hadoop/hbase/protobuf/ProtobufUtil.java   |  60 ++++---
 .../hbase/regionserver/LeaseException.java    |   3 +-
 .../wal/FailedLogCloseException.java          |   3 +-
 .../FailedSyncBeforeLogCloseException.java    |   3 +-
 .../security/AbstractHBaseSaslRpcClient.java  |   4 +-
 .../hadoop/hbase/security/EncryptionUtil.java |   4 +-
 .../hbase/security/HBaseSaslRpcClient.java    |   6 +-
 .../security/access/AccessControlClient.java  |  37 ++--
 .../security/access/AccessControlUtil.java    |  39 ++--
 .../security/visibility/VisibilityClient.java |  44 ++---
 .../hbase/shaded/protobuf/ProtobufUtil.java   | 144 +++++++--------
 .../shaded/protobuf/RequestConverter.java     | 108 ++++++++----
 .../shaded/protobuf/ResponseConverter.java    |  22 +--
 .../apache/hadoop/hbase/util/Writables.java   |   4 +-
 .../hadoop/hbase/zookeeper/ZNodePaths.java    |   4 +-
 .../hbase/client/TestClientNoCluster.java     |  26 ++-
 .../hbase/client/TestDeleteTimeStamp.java     |   2 +-
 .../hbase/client/TestSnapshotFromAdmin.java   |   2 +-
 .../org/apache/hadoop/hbase/AuthUtil.java     |   6 +-
 .../hbase/ByteBufferKeyOnlyKeyValue.java      |   2 +-
 .../org/apache/hadoop/hbase/CellBuilder.java  |   2 +-
 .../hadoop/hbase/CellComparatorImpl.java      |   5 +-
 .../org/apache/hadoop/hbase/CellUtil.java     | 115 ++++++------
 .../hadoop/hbase/CompoundConfiguration.java   |   2 +-
 .../org/apache/hadoop/hbase/ExtendedCell.java |   2 +-
 .../hadoop/hbase/HBaseConfiguration.java      |   2 +-
 .../org/apache/hadoop/hbase/KeyValue.java     | 114 ++++++------
 .../apache/hadoop/hbase/KeyValueTestUtil.java |   4 +-
 .../org/apache/hadoop/hbase/KeyValueUtil.java |  63 +++----
 .../apache/hadoop/hbase/PrivateCellUtil.java  |  92 +++++-----
 .../java/org/apache/hadoop/hbase/Tag.java     |   2 +-
 .../hadoop/hbase/codec/BaseDecoder.java       |   2 +-
 .../apache/hadoop/hbase/codec/CellCodec.java  |   2 +-
 .../hadoop/hbase/codec/CellCodecWithTags.java |   2 +-
 .../hbase/filter/ByteArrayComparable.java     |   8 +-
 .../hbase/io/ByteBufferOutputStream.java      |   2 +-
 .../io/ByteBufferWriterOutputStream.java      |   4 +-
 .../hadoop/hbase/io/CellOutputStream.java     |   4 +-
 .../hbase/io/ImmutableBytesWritable.java      |  10 +-
 .../hbase/io/TagCompressionContext.java       |   8 +-
 .../apache/hadoop/hbase/io/crypto/Cipher.java |   8 +-
 .../hadoop/hbase/io/crypto/Decryptor.java     |   6 +-
 .../hadoop/hbase/io/crypto/Encryption.java    |  22 +--
 .../hadoop/hbase/io/crypto/Encryptor.java     |   6 +-
 .../hadoop/hbase/io/crypto/KeyProvider.java   |   6 +-
 .../hbase/io/encoding/DataBlockEncoder.java   |   9 +-
 .../hbase/io/encoding/DataBlockEncoding.java  |   2 +-
 .../hbase/io/encoding/EncodedDataBlock.java   |   4 +-
 .../encoding/HFileBlockDecodingContext.java   |   6 +-
 .../hadoopbackport/ThrottledInputStream.java  |   3 +-
 .../hadoop/hbase/io/util/Dictionary.java      |   4 +-
 .../hadoop/hbase/io/util/StreamUtils.java     |   4 +-
 .../org/apache/hadoop/hbase/nio/ByteBuff.java |  61 ++++---
 .../hadoop/hbase/nio/MultiByteBuff.java       |  47 ++---
 .../apache/hadoop/hbase/security/User.java    |   5 +-
 .../hadoop/hbase/security/UserProvider.java   |   2 +-
 .../util/AbstractPositionedByteRange.java     |   4 +-
 .../hadoop/hbase/util/ByteBufferUtils.java    |  34 ++--
 .../apache/hadoop/hbase/util/ByteRange.java   |  11 +-
 .../org/apache/hadoop/hbase/util/Bytes.java   |  31 ++--
 .../hadoop/hbase/util/ChecksumType.java       |   8 +-
 .../org/apache/hadoop/hbase/util/Classes.java |   7 +-
 .../hadoop/hbase/util/CommonFSUtils.java      |   2 +-
 .../hbase/util/CoprocessorClassLoader.java    |   2 +-
 .../org/apache/hadoop/hbase/util/HashKey.java |   4 +-
 .../apache/hadoop/hbase/util/KeyLocker.java   |   2 +-
 .../org/apache/hadoop/hbase/util/MD5Hash.java |   8 +-
 .../org/apache/hadoop/hbase/util/Pair.java    |   4 +-
 .../hadoop/hbase/util/PairOfSameType.java     |   4 +-
 .../hbase/util/PositionedByteRange.java       |   4 +-
 .../hadoop/hbase/util/PrettyPrinter.java      |   7 +-
 .../hbase/util/SimpleMutableByteRange.java    |   8 +-
 .../SimplePositionedMutableByteRange.java     |  14 +-
 .../org/apache/hadoop/hbase/util/Threads.java |   2 +-
 .../hadoop/hbase/util/TimeMeasurable.java     |   2 +-
 .../hadoop/hbase/util/UnsafeAccess.java       |   4 +-
 .../hbase/util/WindowMovingAverage.java       |   2 +-
 .../hadoop/hbase/zookeeper/ZKConfig.java      |   8 +-
 .../hadoop/hbase/TestHBaseConfiguration.java  |  10 +-
 .../MetricsRegionServerSource.java            |   2 +-
 .../hadoop/hbase/rest/MetricsRESTSource.java  |   2 +-
 .../thrift/MetricsThriftServerSource.java     |   2 +-
 .../hadoop/metrics2/MetricHistogram.java      |   2 +-
 .../metrics2/util/MetricSampleQuantiles.java  |   4 +-
 .../apache/hadoop/hbase/http/HttpServer.java  |   8 +-
 .../http/ProxyUserAuthenticationFilter.java   |   2 +-
 .../hadoop/hbase/http/jmx/JMXJsonServlet.java |   4 +-
 .../hadoop/hbase/util/JSONMetricUtil.java     |   2 +-
 .../hbase/http/TestHttpServerLifecycle.java   |   2 +-
 .../hadoop/hbase/DistributedHBaseCluster.java |   2 +-
 .../mapreduce/IntegrationTestBulkLoad.java    |   2 +-
 .../test/IntegrationTestBigLinkedList.java    |  18 +-
 .../test/IntegrationTestReplication.java      |   6 +-
 .../apache/hadoop/hbase/mapred/Driver.java    |   3 -
 .../hadoop/hbase/mapred/GroupingTableMap.java |  10 +-
 .../hadoop/hbase/mapred/IdentityTableMap.java |   2 +-
 .../hbase/mapred/IdentityTableReduce.java     |   2 +-
 .../mapred/MultiTableSnapshotInputFormat.java |   1 -
 .../hadoop/hbase/mapred/RowCounter.java       |   7 +-
 .../hbase/mapred/TableInputFormatBase.java    |   8 +-
 .../hbase/mapred/TableOutputFormat.java       |   3 +-
 .../hbase/mapred/TableRecordReader.java       |  14 +-
 .../hbase/mapred/TableRecordReaderImpl.java   |   2 -
 .../hadoop/hbase/mapred/TableSplit.java       |   2 +-
 .../hadoop/hbase/mapreduce/CellCreator.java   |   8 +-
 .../hadoop/hbase/mapreduce/HashTable.java     |   2 +-
 .../hadoop/hbase/mapreduce/ImportTsv.java     |   6 +-
 .../MultiTableHFileOutputFormat.java          |   2 +-
 .../mapreduce/MultiTableOutputFormat.java     |  12 +-
 .../MultiTableSnapshotInputFormatImpl.java    |   8 +-
 .../hadoop/hbase/mapreduce/RowCounter.java    |   2 +-
 .../hbase/mapreduce/TableInputFormatBase.java |   7 +-
 .../hbase/mapreduce/TableMapReduceUtil.java   |   4 +-
 .../hbase/mapreduce/TableOutputFormat.java    |   3 +-
 .../hbase/mapreduce/TableRecordReader.java    |   3 +-
 .../hbase/mapreduce/TextSortReducer.java      |   4 +-
 .../hbase/mapreduce/TsvImporterMapper.java    |   4 +-
 .../mapreduce/TsvImporterTextMapper.java      |   4 +-
 .../hadoop/hbase/PerformanceEvaluation.java   |  13 +-
 .../hbase/mapred/TestTableInputFormat.java    |  18 +-
 .../MultiTableInputFormatTestBase.java        |   2 +-
 .../TestCellBasedHFileOutputFormat2.java      |   8 +-
 .../mapreduce/TestCellBasedImportExport2.java |  16 +-
 .../mapreduce/TestCellBasedWALPlayer2.java    |   2 +-
 .../hadoop/hbase/mapreduce/TestCopyTable.java |   2 +-
 .../mapreduce/TestHFileOutputFormat2.java     |   8 +-
 .../hbase/mapreduce/TestImportExport.java     |  16 +-
 .../TestImportTSVWithOperationAttributes.java |   8 +-
 .../TestImportTSVWithVisibilityLabels.java    |   6 +-
 .../hadoop/hbase/mapreduce/TestImportTsv.java |   2 +-
 .../TestMultiTableInputFormatBase.java        |   2 +-
 .../TestMultithreadedTableMapper.java         |   7 +-
 .../hbase/mapreduce/TestRowCounter.java       |  26 +--
 .../hbase/mapreduce/TestTableInputFormat.java |  25 ++-
 .../hbase/mapreduce/TestTableMapReduce.java   |   4 +-
 .../mapreduce/TestTableMapReduceBase.java     |   5 +-
 .../store/wal/ProcedureWALPrettyPrinter.java  |   3 +-
 .../hbase/replication/ReplicationPeers.java   |   2 +-
 .../hbase/replication/ReplicationTracker.java |   2 +-
 .../hadoop/hbase/rest/ExistsResource.java     |   2 +-
 .../hadoop/hbase/rest/MultiRowResource.java   |   2 +-
 .../rest/NamespacesInstanceResource.java      |   4 +-
 .../hadoop/hbase/rest/NamespacesResource.java |   2 +-
 .../hbase/rest/ProtobufMessageHandler.java    |   2 +-
 .../apache/hadoop/hbase/rest/RESTServlet.java |   2 +-
 .../hadoop/hbase/rest/RegionsResource.java    |   2 +-
 .../hadoop/hbase/rest/RootResource.java       |   2 +-
 .../apache/hadoop/hbase/rest/RowResource.java |   2 +-
 .../hadoop/hbase/rest/ScannerResource.java    |   2 +-
 .../hadoop/hbase/rest/SchemaResource.java     |   2 +-
 .../rest/StorageClusterStatusResource.java    |   2 +-
 .../rest/StorageClusterVersionResource.java   |   2 +-
 .../hadoop/hbase/rest/TableResource.java      |   2 +-
 .../hadoop/hbase/rest/VersionResource.java    |   2 +-
 .../hadoop/hbase/rest/client/Client.java      |  42 ++---
 .../rest/filter/RestCsrfPreventionFilter.java |   2 +-
 .../hadoop/hbase/rest/model/CellModel.java    |  10 +-
 .../rest/model/NamespacesInstanceModel.java   |   4 +-
 .../hbase/rest/model/NamespacesModel.java     |   2 +-
 .../hadoop/hbase/rest/model/ScannerModel.java |   6 +-
 .../hbase/rest/model/TableInfoModel.java      |   2 +-
 .../hadoop/hbase/rest/model/TableModel.java   |   2 +-
 .../hadoop/hbase/rest/client/RemoteAdmin.java |  16 +-
 .../hbase/rest/client/TestRemoteTable.java    |  41 +++++
 .../org/apache/hadoop/hbase/HealthReport.java |   4 +-
 .../hadoop/hbase/LocalHBaseCluster.java       |  14 +-
 .../hadoop/hbase/RegionStateListener.java     |   4 +-
 .../org/apache/hadoop/hbase/SplitLogTask.java |   4 +-
 .../hadoop/hbase/backup/HFileArchiver.java    |   7 +-
 .../hadoop/hbase/client/VersionInfoUtil.java  |   3 +-
 .../hadoop/hbase/constraint/Constraints.java  |  85 +++++----
 .../SplitLogManagerCoordination.java          |   2 +-
 .../ZKSplitLogManagerCoordination.java        |   4 +-
 .../ZkSplitLogWorkerCoordination.java         |   4 +-
 .../hbase/coprocessor/CoprocessorHost.java    |   2 +-
 .../hbase/coprocessor/MasterObserver.java     |  49 +++---
 .../hbase/coprocessor/RegionObserver.java     |  18 +-
 .../hbase/errorhandling/ForeignException.java |   8 +-
 .../errorhandling/ForeignExceptionSnare.java  |   2 +-
 .../hadoop/hbase/executor/EventHandler.java   |   2 +-
 .../hbase/executor/ExecutorService.java       |   2 +-
 .../favored/FavoredNodeAssignmentHelper.java  |  14 +-
 .../hbase/favored/FavoredNodesPlan.java       |   2 +-
 .../org/apache/hadoop/hbase/io/Reference.java |  21 +--
 .../hadoop/hbase/io/hfile/BlockCache.java     |   2 +-
 .../hadoop/hbase/io/hfile/BlockCacheUtil.java |  12 +-
 .../hbase/io/hfile/CacheableDeserializer.java |   2 +-
 .../hbase/io/hfile/CompoundBloomFilter.java   |   2 +-
 .../io/hfile/CompoundBloomFilterWriter.java   |   6 +-
 .../hbase/io/hfile/HFileBlockIndex.java       |  65 +++----
 .../hbase/io/hfile/HFileDataBlockEncoder.java |   6 +-
 .../hbase/io/hfile/HFileReaderImpl.java       |  13 +-
 .../hadoop/hbase/io/hfile/HFileScanner.java   |  21 +--
 .../hbase/io/hfile/HFileWriterImpl.java       |   6 +-
 .../hbase/io/hfile/InlineBlockWriter.java     |   9 +-
 .../io/hfile/bucket/BucketAllocator.java      |   5 +-
 .../hbase/io/hfile/bucket/BucketCache.java    |   5 +-
 .../io/hfile/bucket/ByteBufferIOEngine.java   |   6 +-
 .../hbase/io/hfile/bucket/FileIOEngine.java   |  10 +-
 .../io/hfile/bucket/FileMmapIOEngine.java     |   6 +-
 .../hbase/io/hfile/bucket/IOEngine.java       |   6 +-
 .../hadoop/hbase/io/util/MemorySizeUtil.java  |   9 +-
 .../hadoop/hbase/ipc/PriorityFunction.java    |   6 +-
 .../org/apache/hadoop/hbase/ipc/RpcCall.java  |   2 +-
 .../hadoop/hbase/ipc/RpcCallContext.java      |   2 +-
 .../hadoop/hbase/ipc/RpcSchedulerContext.java |   3 +-
 .../apache/hadoop/hbase/ipc/RpcServer.java    |  13 +-
 .../hadoop/hbase/ipc/RpcServerInterface.java  |   2 +-
 .../hadoop/hbase/ipc/ServerRpcConnection.java |  10 +-
 .../hadoop/hbase/ipc/SimpleRpcScheduler.java  |   6 +-
 .../hadoop/hbase/ipc/SimpleRpcServer.java     |  12 +-
 .../hbase/ipc/SimpleRpcServerResponder.java   |   6 +-
 .../hbase/ipc/SimpleServerRpcConnection.java  |   2 +-
 .../master/AssignmentVerificationReport.java  |   5 +-
 .../hbase/master/DrainingServerTracker.java   |   2 +-
 .../apache/hadoop/hbase/master/HMaster.java   |   3 +-
 .../hadoop/hbase/master/LoadBalancer.java     |  20 ++-
 .../hbase/master/MasterCoprocessorHost.java   |  24 +--
 .../hadoop/hbase/master/MasterFileSystem.java |  10 +-
 .../hbase/master/MasterRpcServices.java       |  10 +-
 .../hadoop/hbase/master/MasterServices.java   |  42 ++---
 .../hadoop/hbase/master/MasterWalManager.java |   7 +-
 .../master/MetricsAssignmentManager.java      |   8 +-
 .../master/RegionPlacementMaintainer.java     |  17 +-
 .../hadoop/hbase/master/ServerManager.java    |  22 ++-
 .../SnapshotOfRegionAssignmentFromMeta.java   |   2 +-
 .../hadoop/hbase/master/SplitLogManager.java  |   8 +-
 .../hbase/master/TableNamespaceManager.java   |   2 +-
 .../MergeTableRegionsProcedure.java           |   2 +-
 .../master/balancer/LoadBalancerFactory.java  |   3 +-
 .../master/balancer/RegionLocationFinder.java |   2 +-
 .../hbase/master/cleaner/CleanerChore.java    |   3 -
 .../procedure/CloneSnapshotProcedure.java     |  10 +-
 .../procedure/CreateNamespaceProcedure.java   |  12 +-
 .../procedure/DeleteNamespaceProcedure.java   |  20 +--
 .../procedure/EnableTableProcedure.java       |  12 +-
 .../procedure/ModifyNamespaceProcedure.java   |   8 +-
 .../procedure/ModifyTableProcedure.java       |   2 +-
 .../procedure/RestoreSnapshotProcedure.java   |  10 +-
 .../master/snapshot/SnapshotManager.java      |  29 +--
 .../hbase/mob/DefaultMobStoreFlusher.java     |   2 +-
 .../org/apache/hadoop/hbase/mob/MobFile.java  |  12 +-
 .../apache/hadoop/hbase/mob/MobFileCache.java |   2 +-
 .../apache/hadoop/hbase/mob/MobFileName.java  |  31 ++--
 .../org/apache/hadoop/hbase/mob/MobUtils.java |  10 +-
 .../hbase/mob/compactions/MobCompactor.java   |   6 +-
 .../hbase/monitoring/ThreadMonitoring.java    |   2 +-
 .../namespace/NamespaceStateManager.java      |   4 +-
 .../procedure/MasterProcedureManager.java     |   8 +-
 .../hadoop/hbase/procedure/Procedure.java     |  14 +-
 .../hbase/procedure/ProcedureCoordinator.java |  13 +-
 .../procedure/ProcedureCoordinatorRpcs.java   |   4 +-
 .../hbase/procedure/ProcedureMember.java      |  12 +-
 .../RegionServerProcedureManager.java         |   4 +-
 .../hadoop/hbase/procedure/Subprocedure.java  |  12 +-
 .../hbase/procedure/ZKProcedureUtil.java      |   2 +-
 ...egionServerFlushTableProcedureManager.java |  11 +-
 .../protobuf/ReplicationProtbufUtil.java      |   4 +-
 .../hbase/regionserver/AbstractMemStore.java  |   2 +-
 .../AnnotationReadingPriorityFunction.java    |  15 +-
 .../hadoop/hbase/regionserver/CellSink.java   |   2 +-
 .../hbase/regionserver/ChunkCreator.java      |   2 +-
 .../regionserver/CompactingMemStore.java      |   2 +-
 .../regionserver/FavoredNodesForRegion.java   |   6 +-
 .../hbase/regionserver/FlushRequester.java    |   8 +-
 .../hadoop/hbase/regionserver/HMobStore.java  |  16 +-
 .../hadoop/hbase/regionserver/HRegion.java    |  84 ++++-----
 .../hbase/regionserver/HRegionFileSystem.java |  51 +++---
 .../hbase/regionserver/HRegionServer.java     |  12 +-
 .../hadoop/hbase/regionserver/HStoreFile.java |   9 +-
 .../hbase/regionserver/HeapMemoryTuner.java   |   4 +-
 .../hbase/regionserver/InternalScan.java      |   2 +-
 .../hbase/regionserver/InternalScanner.java   |   6 +-
 .../hbase/regionserver/KeyValueHeap.java      |  14 +-
 .../hbase/regionserver/KeyValueScanner.java   |   2 +-
 .../hadoop/hbase/regionserver/MemStore.java   |  17 +-
 .../hbase/regionserver/MemStoreFlusher.java   |  20 +--
 .../MiniBatchOperationInProgress.java         |  16 +-
 .../MultiVersionConcurrencyControl.java       |   4 +-
 .../regionserver/MutableOnlineRegions.java    |   2 +-
 .../hbase/regionserver/OnlineRegions.java     |   8 +-
 .../hbase/regionserver/OperationStatus.java   |   9 +-
 .../hbase/regionserver/RSRpcServices.java     |  32 ++--
 .../hadoop/hbase/regionserver/Region.java     |  33 ++--
 .../regionserver/RegionCoprocessorHost.java   |  36 ++--
 .../hbase/regionserver/RegionScanner.java     |   2 +-
 .../hbase/regionserver/RegionSplitPolicy.java |   3 +-
 .../regionserver/ReplicationSinkService.java  |   1 -
 .../regionserver/ReversedKeyValueHeap.java    |   8 +-
 .../ReversedRegionScannerImpl.java            |   3 +-
 .../regionserver/ReversedStoreScanner.java    |   5 +-
 .../hbase/regionserver/RowProcessor.java      |   4 +-
 .../hadoop/hbase/regionserver/ScanInfo.java   |   4 +-
 .../hbase/regionserver/ScannerContext.java    |  32 +---
 .../regionserver/SecureBulkLoadManager.java   |   4 +-
 .../hbase/regionserver/SegmentFactory.java    |   2 +-
 .../hbase/regionserver/ShipperListener.java   |   2 +-
 .../hbase/regionserver/ShutdownHook.java      |   6 +-
 .../hadoop/hbase/regionserver/Store.java      |   2 +-
 .../hbase/regionserver/StoreFileInfo.java     |   4 +-
 .../hbase/regionserver/StoreFileManager.java  |   4 +-
 .../hbase/regionserver/StoreFileReader.java   |   6 +-
 .../hbase/regionserver/StoreFileScanner.java  |   4 +-
 .../hbase/regionserver/StoreFlushContext.java |   6 +-
 .../hbase/regionserver/StoreFlusher.java      |   4 +-
 .../hbase/regionserver/StoreScanner.java      |  19 +-
 .../hbase/regionserver/TimeRangeTracker.java  |   2 +-
 .../compactions/CompactionProgress.java       |   2 +-
 .../compactions/DefaultCompactor.java         |   2 +-
 .../ExploringCompactionPolicy.java            |   8 +-
 .../compactions/SortedCompactionPolicy.java   |   4 +-
 .../querymatcher/ColumnTracker.java           |   7 +-
 .../querymatcher/ScanDeleteTracker.java       |   2 +-
 .../querymatcher/ScanQueryMatcher.java        |   6 +-
 .../ScanWildcardColumnTracker.java            |   2 +-
 .../snapshot/RegionServerSnapshotManager.java |  16 +-
 .../hbase/regionserver/wal/AbstractFSWAL.java |   4 +-
 .../regionserver/wal/ProtobufLogReader.java   |   2 +-
 .../wal/SequenceIdAccounting.java             |   7 +-
 .../hbase/regionserver/wal/SyncFuture.java    |   2 +-
 .../regionserver/wal/WALActionsListener.java  |   7 +-
 .../replication/HBaseReplicationEndpoint.java |   2 +-
 .../regionserver/DumpReplicationQueues.java   |   2 +-
 .../replication/regionserver/MetricsSink.java |  10 +-
 .../regionserver/MetricsSource.java           |  18 +-
 .../replication/regionserver/Replication.java |   1 -
 .../regionserver/ReplicationLoad.java         |   2 +-
 .../regionserver/ReplicationSink.java         |  10 +-
 .../regionserver/ReplicationSinkManager.java  |   6 +-
 .../ReplicationSourceManager.java             |   2 +-
 .../hbase/security/access/AccessChecker.java  |   2 +-
 .../security/access/AccessController.java     |   8 +-
 .../hbase/security/access/AuthManager.java    |   2 +-
 .../security/access/ZKPermissionWatcher.java  |   4 +-
 .../DefaultVisibilityLabelServiceImpl.java    |   5 +-
 .../visibility/ScanLabelGenerator.java        |   3 +-
 .../visibility/VisibilityController.java      |   4 +-
 .../visibility/VisibilityLabelService.java    |  43 +++--
 .../VisibilityLabelServiceManager.java        |   5 +-
 .../visibility/VisibilityLabelsCache.java     |   6 +-
 .../security/visibility/VisibilityUtils.java  |  27 +--
 .../visibility/ZKVisibilityLabelWatcher.java  |   4 +-
 .../hbase/snapshot/RestoreSnapshotHelper.java |   6 +-
 .../snapshot/SnapshotDescriptionUtils.java    |   3 +-
 .../hadoop/hbase/util/BloomContext.java       |   4 +-
 .../apache/hadoop/hbase/util/BloomFilter.java |   4 +-
 .../hadoop/hbase/util/BloomFilterChunk.java   |   2 +-
 .../hadoop/hbase/util/BloomFilterFactory.java |  18 +-
 .../hadoop/hbase/util/BloomFilterUtil.java    |  27 +--
 .../hadoop/hbase/util/DirectMemoryUtils.java  |   4 +-
 .../hadoop/hbase/util/EncryptionTest.java     |   3 +-
 .../hadoop/hbase/util/FSTableDescriptors.java |   4 +-
 .../org/apache/hadoop/hbase/util/FSUtils.java |  56 +++---
 .../apache/hadoop/hbase/util/HBaseFsck.java   |  20 +--
 .../hadoop/hbase/util/HBaseFsckRepair.java    |   2 +-
 .../hadoop/hbase/util/JVMClusterUtil.java     |  11 +-
 .../hadoop/hbase/util/ModifyRegionUtils.java  |   8 +-
 .../hadoop/hbase/util/MunkresAssignment.java  |   2 +-
 .../apache/hadoop/hbase/util/RegionMover.java |   6 +-
 .../hbase/util/RegionSplitCalculator.java     |   2 +-
 .../hadoop/hbase/util/RegionSplitter.java     |  28 ++-
 .../hbase/util/RollingStatCalculator.java     |  10 +-
 .../hadoop/hbase/util/ZKDataMigrator.java     |   3 +-
 .../util/hbck/HFileCorruptionChecker.java     |  22 +--
 .../java/org/apache/hadoop/hbase/wal/WAL.java |  10 +-
 .../apache/hadoop/hbase/wal/WALKeyImpl.java   |  12 +-
 .../hadoop/hbase/wal/WALPrettyPrinter.java    |  53 +++---
 .../org/apache/hadoop/hbase/HBaseCluster.java |   2 +-
 .../apache/hadoop/hbase/HBaseTestCase.java    |  21 +--
 .../hadoop/hbase/HBaseTestingUtility.java     | 166 ++++++++++--------
 .../hbase/HFilePerformanceEvaluation.java     |  16 +-
 .../apache/hadoop/hbase/MetaMockingUtil.java  |   6 +-
 .../apache/hadoop/hbase/MiniHBaseCluster.java |  32 ++--
 .../hadoop/hbase/TestGlobalMemStoreSize.java  |   4 +-
 .../TestHColumnDescriptorDefaultVersions.java |   2 +-
 .../hadoop/hbase/TestMultiVersions.java       |   2 +-
 .../TestPartialResultsFromClientSide.java     |  28 +--
 .../hadoop/hbase/TestRegionRebalancing.java   |   2 +-
 .../hadoop/hbase/TestSerialization.java       |   2 +-
 .../hadoop/hbase/TimestampTestBase.java       |  11 +-
 .../hbase/backup/TestHFileArchiving.java      |   6 +-
 .../hbase/client/FromClientSideBase.java      |   8 +-
 .../client/HConnectionTestingUtility.java     |   6 +-
 .../hadoop/hbase/client/TestAdmin2.java       |  12 +-
 .../hbase/client/TestClientTimeouts.java      |   2 +-
 .../client/TestConnectionImplementation.java  |   6 +-
 .../hadoop/hbase/client/TestEnableTable.java  |   2 +-
 .../hbase/client/TestFromClientSide3.java     |   2 +-
 .../TestFromClientSideScanExcpetion.java      |   2 +-
 .../hbase/client/TestIntraRowPagination.java  |   2 +-
 .../hadoop/hbase/client/TestMetaCache.java    |   2 +-
 .../hadoop/hbase/client/TestResult.java       |   5 +-
 .../hbase/client/TestScannerTimeout.java      |   6 +-
 .../client/TestScannersFromClientSide.java    |  12 +-
 .../hadoop/hbase/client/TestSizeFailures.java |   2 +-
 .../client/TestSmallReversedScanner.java      |   4 +-
 .../hbase/client/TestSnapshotFromClient.java  |   5 +-
 .../hbase/client/TestSnapshotMetadata.java    |   2 +-
 .../hbase/client/TestTimestampsFilter.java    |   4 +-
 .../hbase/client/locking/TestEntityLocks.java |   2 +-
 .../replication/TestReplicationAdmin.java     |   3 +-
 .../hbase/constraint/TestConstraint.java      |  10 +-
 .../hbase/constraint/TestConstraints.java     |   6 +-
 .../TestCoreMasterCoprocessor.java            |   2 +-
 .../TestCoreRegionCoprocessor.java            |   2 +-
 .../TestCoreRegionServerCoprocessor.java      |   2 +-
 .../TestOpenTableInCoprocessor.java           |   2 +-
 .../coprocessor/TestRegionObserverBypass.java |   4 +-
 ...verForAddingMutationsFromCoprocessors.java |   2 +-
 .../TestRegionObserverInterface.java          |   2 +-
 .../filter/TestColumnPaginationFilter.java    |   4 +-
 .../filter/TestDependentColumnFilter.java     |   4 +-
 .../hadoop/hbase/filter/TestFilter.java       |   8 +-
 .../hadoop/hbase/filter/TestFilterList.java   |  14 +-
 .../TestFilterListOrOperatorWithBlkCnt.java   |   6 +-
 ...FirstKeyValueMatchingQualifiersFilter.java |   2 +-
 .../hbase/filter/TestInclusiveStopFilter.java |   4 +-
 .../hbase/filter/TestMultiRowRangeFilter.java |   6 +-
 .../hadoop/hbase/filter/TestPageFilter.java   |   4 +-
 .../hbase/filter/TestRandomRowFilter.java     |   4 +-
 .../TestSingleColumnValueExcludeFilter.java   |   2 +-
 .../filter/TestSingleColumnValueFilter.java   |   4 +-
 .../hbase/io/TestHalfStoreFileReader.java     |   2 +-
 .../apache/hadoop/hbase/io/TestHeapSize.java  |   2 +-
 .../io/encoding/TestDataBlockEncoders.java    |   6 +-
 .../hadoop/hbase/io/hfile/NanoTimer.java      |   6 +-
 .../hbase/io/hfile/RandomDistribution.java    |  15 +-
 .../hbase/io/hfile/RandomKeyValueUtil.java    |   3 +-
 .../hadoop/hbase/io/hfile/TestHFile.java      |   4 +-
 .../hbase/io/hfile/TestHFileBlockIndex.java   |   3 +-
 .../io/hfile/TestHFileDataBlockEncoder.java   |   4 +-
 .../io/hfile/bucket/TestBucketCache.java      |   3 +-
 .../hfile/bucket/TestBucketCacheRefCnt.java   |   2 -
 .../hfile/bucket/TestBucketWriterThread.java  |   8 +-
 .../hadoop/hbase/master/MockRegionServer.java |   5 +-
 .../hbase/master/TestActiveMasterManager.java |   2 +-
 ...TestMasterFailoverBalancerPersistence.java |   6 +-
 .../hbase/master/TestMasterNoCluster.java     |   6 +-
 .../hbase/master/TestMasterTransitions.java   |  10 +-
 .../hbase/master/TestRegionPlacement.java     |  10 +-
 .../master/balancer/BalancerTestBase.java     |   4 +-
 .../master/balancer/TestBaseLoadBalancer.java |   7 +-
 .../balancer/TestSimpleLoadBalancer.java      |   2 +-
 .../master/janitor/TestCatalogJanitor.java    |   2 +-
 .../TestCatalogJanitorInMemoryStates.java     |   4 +-
 .../MasterProcedureTestingUtility.java        |   2 +-
 ...TableDescriptorModificationFromClient.java |   2 +-
 .../apache/hadoop/hbase/mob/MobTestUtil.java  |   2 +-
 .../procedure/SimpleRSProcedureManager.java   |   2 +-
 .../procedure/TestZKProcedureControllers.java |   4 +-
 .../hbase/protobuf/TestProtobufUtil.java      |  12 +-
 .../protobuf/TestReplicationProtobuf.java     |   2 +-
 .../regionserver/CreateRandomStoreFile.java   |   2 +-
 .../regionserver/DataBlockEncodingTool.java   |   4 +-
 .../regionserver/TestCompactingMemStore.java  |  10 +-
 .../hbase/regionserver/TestCompaction.java    |   4 +-
 .../regionserver/TestCompactionState.java     |   5 +-
 .../TestDateTieredCompactionPolicy.java       |   2 +-
 .../regionserver/TestDefaultMemStore.java     |  20 +--
 .../regionserver/TestDeleteMobTable.java      |   2 +-
 .../TestGetClosestAtOrBefore.java             |   4 +-
 .../hbase/regionserver/TestHMobStore.java     |  16 +-
 .../hbase/regionserver/TestHRegion.java       |  29 ++-
 .../regionserver/TestHRegionReplayEvents.java |   4 +-
 .../hadoop/hbase/regionserver/TestHStore.java |   2 +-
 .../hbase/regionserver/TestHStoreFile.java    |   2 +-
 .../regionserver/TestJoinedScanners.java      |   3 +-
 .../regionserver/TestMajorCompaction.java     |   4 +-
 .../TestMasterAddressTracker.java             |   2 +-
 .../TestPerColumnFamilyFlush.java             |   2 +-
 .../TestRSKilledWhenInitializing.java         |   2 +-
 .../regionserver/TestRegionIncrement.java     |   4 +-
 .../TestRegionReplicaFailover.java            |   2 +-
 .../TestRegionServerOnlineConfigChange.java   |   4 +-
 .../TestRequestsPerSecondMetric.java          |   2 +-
 .../hbase/regionserver/TestRowTooBig.java     |   4 +-
 .../hbase/regionserver/TestScanner.java       |   2 +-
 .../TestSplitTransactionOnCluster.java        |   7 +-
 .../hbase/regionserver/TestStoreScanner.java  |   4 +-
 .../TestUserScanQueryMatcher.java             |   6 +-
 .../regionserver/wal/AbstractTestFSWAL.java   |   8 +-
 .../wal/AbstractTestProtobufLog.java          |   4 +-
 .../wal/AbstractTestWALReplay.java            |  20 +--
 .../regionserver/wal/TestLogRolling.java      |   2 +-
 .../wal/TestLogRollingNoCluster.java          |   2 +-
 .../TestReplicationDisableInactivePeer.java   |   2 +-
 .../regionserver/TestReplicationSink.java     |  10 +-
 .../TestReplicationSourceManager.java         |   8 +-
 .../regionserver/TestWALEntrySinkFilter.java  |   2 +-
 .../hadoop/hbase/security/TestSecureIPC.java  |   6 +-
 .../TestUsersOperationsWithSecureHadoop.java  |   2 +-
 .../snapshot/MobSnapshotTestingUtils.java     |   3 +-
 .../hbase/snapshot/SnapshotTestingUtils.java  |   2 +-
 ...estLoadIncrementalHFilesSplitRecovery.java |   4 +-
 .../hadoop/hbase/util/BaseTestHBaseFsck.java  |  13 +-
 .../hbase/util/HFileArchiveTestingUtil.java   |   4 +-
 .../apache/hadoop/hbase/util/MockServer.java  |   2 +-
 .../util/ProcessBasedLocalHBaseCluster.java   |   2 +-
 .../apache/hadoop/hbase/util/TestFSUtils.java |   2 +-
 .../hbase/util/hbck/HbckTestingUtil.java      |   2 +-
 .../util/test/LoadTestDataGenerator.java      |  10 +-
 .../hadoop/hbase/wal/IOTestProvider.java      |   2 +-
 .../hadoop/hbase/wal/TestFSHLogProvider.java  |   7 +-
 .../hadoop/hbase/wal/TestWALFactory.java      |   6 +-
 .../hadoop/hbase/wal/TestWALMethods.java      |   2 +-
 .../wal/TestWALOpenAfterDNRollingStart.java   |   2 +-
 .../apache/hadoop/hbase/wal/TestWALSplit.java |   4 +-
 .../hbase/wal/WALPerformanceEvaluation.java   |   5 +-
 .../hbase/thrift/HBaseServiceHandler.java     |   2 +-
 .../hbase/thrift/IncrementCoalescer.java      |   2 +-
 .../thrift/ThriftHBaseServiceHandler.java     |   2 +-
 .../hadoop/hbase/thrift/ThriftUtilities.java  |  20 ++-
 .../hadoop/hbase/thrift/TestThriftServer.java |  20 +--
 ...stThriftHBaseServiceHandlerWithLabels.java |   5 +-
 .../hbase/zookeeper/MetaTableLocator.java     |   4 +-
 .../hbase/zookeeper/RecoverableZooKeeper.java |   5 +-
 .../apache/hadoop/hbase/zookeeper/ZKUtil.java |  30 ++--
 612 files changed, 2991 insertions(+), 2886 deletions(-)

diff --git a/hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputSaslHelper.java b/hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputSaslHelper.java
index ee02d42d2d3..469fc38ad19 100644
--- a/hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputSaslHelper.java
+++ b/hbase-asyncfs/src/main/java/org/apache/hadoop/hbase/io/asyncfs/FanOutOneBlockAsyncDFSOutputSaslHelper.java
@@ -367,7 +367,7 @@ public final class FanOutOneBlockAsyncDFSOutputSaslHelper {
        * Create a ByteString from byte array without copying (wrap), and then set it as the payload
        * for the builder.
        * @param builder builder for HDFS DataTransferEncryptorMessage.
-       * @param payload byte array of payload. n
+       * @param payload byte array of payload.
        */
       static void wrapAndSetPayload(DataTransferEncryptorMessageProto.Builder builder,
         byte[] payload) throws IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/AsyncMetaTableAccessor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/AsyncMetaTableAccessor.java
index 414d4ee7b49..8029b0314cc 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/AsyncMetaTableAccessor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/AsyncMetaTableAccessor.java
@@ -102,8 +102,8 @@ public class AsyncMetaTableAccessor {
   }
 
   /**
-   * Returns the HRegionLocation from meta for the given region n * @param regionName region we're
-   * looking for
+   * Returns the HRegionLocation from meta for the given region
+   * @param regionName region we're looking for
    * @return HRegionLocation for the given region
    */
   public static CompletableFuture<Optional<HRegionLocation>>
@@ -128,8 +128,8 @@ public class AsyncMetaTableAccessor {
   }
 
   /**
-   * Returns the HRegionLocation from meta for the given encoded region name n * @param
-   * encodedRegionName region we're looking for
+   * Returns the HRegionLocation from meta for the given encoded region name
+   * @param encodedRegionName region we're looking for
    * @return HRegionLocation for the given region
    */
   public static CompletableFuture<Optional<HRegionLocation>>
@@ -176,8 +176,8 @@ public class AsyncMetaTableAccessor {
   }
 
   /**
-   * Used to get all region locations for the specific table. n * @param tableName table we're
-   * looking for, can be null for getting all regions
+   * Used to get all region locations for the specific table.
+   * @param tableName table we're looking for, can be null for getting all regions
    * @return the list of region locations. The return value will be wrapped by a
    *         {@link CompletableFuture}.
    */
@@ -200,8 +200,8 @@ public class AsyncMetaTableAccessor {
   }
 
   /**
-   * Used to get table regions' info and server. n * @param tableName table we're looking for, can
-   * be null for getting all regions
+   * Used to get table regions' info and server.
+   * @param tableName                   table we're looking for, can be null for getting all regions
    * @param excludeOfflinedSplitParents don't return split parents
    * @return the list of regioninfos and server. The return value will be wrapped by a
    *         {@link CompletableFuture}.
@@ -259,9 +259,10 @@ public class AsyncMetaTableAccessor {
   }
 
   /**
-   * Performs a scan of META table for given table. n * @param tableName table withing we scan
-   * @param type    scanned part of meta
-   * @param visitor Visitor invoked against each row
+   * Performs a scan of META table for given table.
+   * @param tableName table withing we scan
+   * @param type      scanned part of meta
+   * @param visitor   Visitor invoked against each row
    */
   private static CompletableFuture<Void> scanMeta(AsyncTable<AdvancedScanResultConsumer> metaTable,
     TableName tableName, QueryType type, final Visitor visitor) {
@@ -270,11 +271,12 @@ public class AsyncMetaTableAccessor {
   }
 
   /**
-   * Performs a scan of META table for given table. n * @param startRow Where to start the scan
-   * @param stopRow Where to stop the scan
-   * @param type    scanned part of meta
-   * @param maxRows maximum rows to return
-   * @param visitor Visitor invoked against each row
+   * Performs a scan of META table for given table.
+   * @param startRow Where to start the scan
+   * @param stopRow  Where to stop the scan
+   * @param type     scanned part of meta
+   * @param maxRows  maximum rows to return
+   * @param visitor  Visitor invoked against each row
    */
   private static CompletableFuture<Void> scanMeta(AsyncTable<AdvancedScanResultConsumer> metaTable,
     byte[] startRow, byte[] stopRow, QueryType type, int maxRows, final Visitor visitor) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterId.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterId.java
index 9b7a5de19bd..3b29e286561 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterId.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterId.java
@@ -52,7 +52,8 @@ public class ClusterId {
 
   /**
    * @param bytes A pb serialized {@link ClusterId} instance with pb magic prefix
-   * @return An instance of {@link ClusterId} made from <code>bytes</code> n * @see #toByteArray()
+   * @return An instance of {@link ClusterId} made from <code>bytes</code>
+   * @see #toByteArray()
    */
   public static ClusterId parseFrom(final byte[] bytes) throws DeserializationException {
     if (ProtobufUtil.isPBMagicPrefix(bytes)) {
@@ -78,9 +79,7 @@ public class ClusterId {
     return builder.setClusterId(this.id).build();
   }
 
-  /**
-   * n * @return A {@link ClusterId} made from the passed in <code>cid</code>
-   */
+  /** Returns A {@link ClusterId} made from the passed in <code>cid</code> */
   public static ClusterId convert(final ClusterIdProtos.ClusterId cid) {
     return new ClusterId(cid.getClusterId());
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java
index f21ed0e837b..d3a0c64f4fb 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/ClusterStatus.java
@@ -269,7 +269,7 @@ public class ClusterStatus implements ClusterMetrics {
   }
 
   /**
-   * n * @return Server's load or null if not found.
+   * @return Server's load or null if not found.
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link #getLiveServerMetrics} instead.
    */
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java
index 1ed87a38a4d..7b222e868bd 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java
@@ -358,8 +358,8 @@ public class HColumnDescriptor implements ColumnFamilyDescriptor, Comparable<HCo
 
   /**
    * Set whether the tags should be compressed along with DataBlockEncoding. When no
-   * DataBlockEncoding is been used, this is having no effect. n * @return this (for chained
-   * invocation)
+   * DataBlockEncoding is been used, this is having no effect.
+   * @return this (for chained invocation)
    */
   public HColumnDescriptor setCompressTags(boolean value) {
     getDelegateeForModification().setCompressTags(value);
@@ -668,8 +668,8 @@ public class HColumnDescriptor implements ColumnFamilyDescriptor, Comparable<HCo
 
   /**
    * @param bytes A pb serialized {@link HColumnDescriptor} instance with pb magic prefix
-   * @return An instance of {@link HColumnDescriptor} made from <code>bytes</code> n * @see
-   *         #toByteArray()
+   * @return An instance of {@link HColumnDescriptor} made from <code>bytes</code>
+   * @see #toByteArray()
    */
   public static HColumnDescriptor parseFrom(final byte[] bytes) throws DeserializationException {
     ColumnFamilyDescriptor desc = ColumnFamilyDescriptorBuilder.parseFrom(bytes);
@@ -713,7 +713,7 @@ public class HColumnDescriptor implements ColumnFamilyDescriptor, Comparable<HCo
   }
 
   /**
-   * Set the encryption algorithm for use with this family n
+   * Set the encryption algorithm for use with this family
    */
   public HColumnDescriptor setEncryptionType(String value) {
     getDelegateeForModification().setEncryptionType(value);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
index 651ce492d39..d89de53d1ff 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionInfo.java
@@ -93,7 +93,7 @@ public class HRegionInfo implements RegionInfo {
   private static final int MAX_REPLICA_ID = 0xFFFF;
 
   /**
-   * n * @return the encodedName
+   * @return the encodedName
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link org.apache.hadoop.hbase.client.RegionInfo#encodeRegionName(byte[])}.
    */
@@ -211,7 +211,7 @@ public class HRegionInfo implements RegionInfo {
    * Construct HRegionInfo with explicit parameters
    * @param tableName the table name
    * @param startKey  first key in region
-   * @param endKey    end of key range n
+   * @param endKey    end of key range
    */
   public HRegionInfo(final TableName tableName, final byte[] startKey, final byte[] endKey)
     throws IllegalArgumentException {
@@ -224,7 +224,7 @@ public class HRegionInfo implements RegionInfo {
    * @param startKey  first key in region
    * @param endKey    end of key range
    * @param split     true if this region has split and we have daughter regions regions that may or
-   *                  may not hold references to this region. n
+   *                  may not hold references to this region.
    */
   public HRegionInfo(final TableName tableName, final byte[] startKey, final byte[] endKey,
     final boolean split) throws IllegalArgumentException {
@@ -238,7 +238,7 @@ public class HRegionInfo implements RegionInfo {
    * @param endKey    end of key range
    * @param split     true if this region has split and we have daughter regions regions that may or
    *                  may not hold references to this region.
-   * @param regionid  Region id to use. n
+   * @param regionid  Region id to use.
    */
   public HRegionInfo(final TableName tableName, final byte[] startKey, final byte[] endKey,
     final boolean split, final long regionid) throws IllegalArgumentException {
@@ -253,7 +253,7 @@ public class HRegionInfo implements RegionInfo {
    * @param split     true if this region has split and we have daughter regions regions that may or
    *                  may not hold references to this region.
    * @param regionid  Region id to use.
-   * @param replicaId the replicaId to use n
+   * @param replicaId the replicaId to use
    */
   public HRegionInfo(final TableName tableName, final byte[] startKey, final byte[] endKey,
     final boolean split, final long regionid, final int replicaId) throws IllegalArgumentException {
@@ -279,7 +279,7 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Costruct a copy of another HRegionInfo n
+   * Costruct a copy of another HRegionInfo
    */
   public HRegionInfo(RegionInfo other) {
     super();
@@ -302,7 +302,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Make a region name of passed parameters. n * @param startKey Can be null
+   * Make a region name of passed parameters.
+   * @param startKey  Can be null
    * @param regionid  Region id (Usually timestamp from when region was created).
    * @param newFormat should we create the region name in the new format (such that it contains its
    *                  encoded name?).
@@ -318,7 +319,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Make a region name of passed parameters. n * @param startKey Can be null
+   * Make a region name of passed parameters.
+   * @param startKey  Can be null
    * @param id        Region id (Usually timestamp from when region was created).
    * @param newFormat should we create the region name in the new format (such that it contains its
    *                  encoded name?).
@@ -334,10 +336,11 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Make a region name of passed parameters. n * @param startKey Can be null
-   * @param regionid Region id (Usually timestamp from when region was created). n * @param
-   *                 newFormat should we create the region name in the new format (such that it
-   *                 contains its encoded name?).
+   * Make a region name of passed parameters.
+   * @param startKey  Can be null
+   * @param regionid  Region id (Usually timestamp from when region was created).
+   * @param newFormat should we create the region name in the new format (such that it contains its
+   *                  encoded name?).
    * @return Region name made of passed tableName, startKey, id and replicaId
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link RegionInfo#createRegionName(TableName, byte[], long, int, boolean)}.
@@ -351,7 +354,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Make a region name of passed parameters. n * @param startKey Can be null
+   * Make a region name of passed parameters.
+   * @param startKey  Can be null
    * @param id        Region id (Usually timestamp from when region was created).
    * @param newFormat should we create the region name in the new format (such that it contains its
    *                  encoded name?).
@@ -367,9 +371,10 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Make a region name of passed parameters. n * @param startKey Can be null
-   * @param id Region id (Usually timestamp from when region was created). n * @param newFormat
-   *           should we create the region name in the new format
+   * Make a region name of passed parameters.
+   * @param startKey  Can be null
+   * @param id        Region id (Usually timestamp from when region was created).
+   * @param newFormat should we create the region name in the new format
    * @return Region name made of passed tableName, startKey, id and replicaId
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link RegionInfo#createRegionName(TableName, byte[], byte[], int, boolean)}.
@@ -394,7 +399,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Gets the start key from the specified region name. n * @return Start key.
+   * Gets the start key from the specified region name.
+   * @return Start key.
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link org.apache.hadoop.hbase.client.RegionInfo#getStartKey(byte[])}.
    */
@@ -404,9 +410,10 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Separate elements of a regionName. n * @return Array of byte[] containing tableName, startKey
-   * and id n * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
-   * {@link RegionInfo#parseRegionName(byte[])}.
+   * Separate elements of a regionName.
+   * @return Array of byte[] containing tableName, startKey and id
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
+   *             {@link RegionInfo#parseRegionName(byte[])}.
    */
   @Deprecated
   @InterfaceAudience.Private
@@ -415,9 +422,9 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * n * @return if region name is encoded. n * @deprecated As of release 2.0.0, this will be
-   * removed in HBase 3.0.0 Use
-   * {@link org.apache.hadoop.hbase.client.RegionInfo#isEncodedRegionName(byte[])}.
+   * @return if region name is encoded.
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
+   *             {@link org.apache.hadoop.hbase.client.RegionInfo#isEncodedRegionName(byte[])}.
    */
   @Deprecated
   public static boolean isEncodedRegionName(byte[] regionName) throws IOException {
@@ -483,7 +490,7 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get current table name of the region n
+   * Get current table name of the region
    */
   @Override
   public TableName getTable() {
@@ -725,7 +732,8 @@ public class HRegionInfo implements RegionInfo {
 
   /**
    * @param bytes A pb RegionInfo serialized with a pb magic prefix.
-   * @return A deserialized {@link HRegionInfo} n * @see #toByteArray()
+   * @return A deserialized {@link HRegionInfo}
+   * @see #toByteArray()
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link org.apache.hadoop.hbase.client.RegionInfo#parseFrom(byte[])}.
    */
@@ -738,7 +746,8 @@ public class HRegionInfo implements RegionInfo {
    * @param bytes  A pb RegionInfo serialized with a pb magic prefix.
    * @param offset starting point in the byte array
    * @param len    length to read on the byte array
-   * @return A deserialized {@link HRegionInfo} n * @see #toByteArray()
+   * @return A deserialized {@link HRegionInfo}
+   * @see #toByteArray()
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link org.apache.hadoop.hbase.client.RegionInfo#parseFrom(byte[], int, int)}.
    */
@@ -763,8 +772,8 @@ public class HRegionInfo implements RegionInfo {
   /**
    * Use this instead of {@link #toByteArray()} when writing to a stream and you want to use the pb
    * mergeDelimitedFrom (w/o the delimiter, pb reads to EOF which may not be what you want).
-   * @return This instance serialized as a delimited protobuf w/ a magic pb prefix. n * @see
-   *         #toByteArray()
+   * @return This instance serialized as a delimited protobuf w/ a magic pb prefix.
+   * @see #toByteArray()
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link RegionInfo#toDelimitedByteArray(RegionInfo)}.
    */
@@ -774,8 +783,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get the descriptive name as {@link RegionState} does it but with hidden startkey optionally nn
-   * * @return descriptive string
+   * Get the descriptive name as {@link RegionState} does it but with hidden startkey optionally
+   * @return descriptive string
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             RegionInfoDisplay#getDescriptiveNameFromRegionStateForDisplay(RegionState,
    *             Configuration) over in hbase-server module.
@@ -788,7 +797,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get the end key for display. Optionally hide the real end key. nn * @return the endkey
+   * Get the end key for display. Optionally hide the real end key.
+   * @return the endkey
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             RegionInfoDisplay#getEndKeyForDisplay(RegionInfo, Configuration) over in
    *             hbase-server module.
@@ -800,7 +810,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get the start key for display. Optionally hide the real start key. nn * @return the startkey
+   * Get the start key for display. Optionally hide the real start key.
+   * @return the startkey
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             RegionInfoDisplay#getStartKeyForDisplay(RegionInfo, Configuration) over in
    *             hbase-server module.
@@ -812,8 +823,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get the region name for display. Optionally hide the start key. nn * @return region name as
-   * String
+   * Get the region name for display. Optionally hide the start key.
+   * @return region name as String
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             RegionInfoDisplay#getRegionNameAsStringForDisplay(RegionInfo, Configuration) over
    *             in hbase-server module.
@@ -825,7 +836,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get the region name for display. Optionally hide the start key. nn * @return region name bytes
+   * Get the region name for display. Optionally hide the start key.
+   * @return region name bytes
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             RegionInfoDisplay#getRegionNameForDisplay(RegionInfo, Configuration) over in
    *             hbase-server module.
@@ -838,9 +850,10 @@ public class HRegionInfo implements RegionInfo {
 
   /**
    * Parses an HRegionInfo instance from the passed in stream. Presumes the HRegionInfo was
-   * serialized to the stream with {@link #toDelimitedByteArray()} n * @return An instance of
-   * HRegionInfo. n * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
-   * {@link RegionInfo#parseFrom(DataInputStream)}.
+   * serialized to the stream with {@link #toDelimitedByteArray()}
+   * @return An instance of HRegionInfo.
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
+   *             {@link RegionInfo#parseFrom(DataInputStream)}.
    */
   @Deprecated
   @InterfaceAudience.Private
@@ -868,8 +881,8 @@ public class HRegionInfo implements RegionInfo {
    * to EOF which may not be what you want). {@link #parseDelimitedFrom(byte[], int, int)} can be
    * used to read back the instances.
    * @param infos HRegionInfo objects to serialize
-   * @return This instance serialized as a delimited protobuf w/ a magic pb prefix. n * @see
-   *         #toByteArray()
+   * @return This instance serialized as a delimited protobuf w/ a magic pb prefix.
+   * @see #toByteArray()
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link RegionInfo#toDelimitedByteArray(RegionInfo...)}.
    */
@@ -910,7 +923,8 @@ public class HRegionInfo implements RegionInfo {
   }
 
   /**
-   * Check whether two regions are adjacent nn * @return true if two regions are adjacent
+   * Check whether two regions are adjacent
+   * @return true if two regions are adjacent
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link org.apache.hadoop.hbase.client.RegionInfo#areAdjacent(RegionInfo, RegionInfo)}.
    */
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionLocation.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionLocation.java
index 6ae93bb3954..7a431535ec3 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionLocation.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/HRegionLocation.java
@@ -82,7 +82,7 @@ public class HRegionLocation implements Comparable<HRegionLocation> {
   }
 
   /**
-   * @return Immutable HRegionInfo
+   * Returns immutable HRegionInfo
    * @deprecated Since 2.0.0. Will remove in 3.0.0. Use {@link #getRegion()}} instead.
    */
   @Deprecated
@@ -90,9 +90,7 @@ public class HRegionLocation implements Comparable<HRegionLocation> {
     return regionInfo == null ? null : new ImmutableHRegionInfo(regionInfo);
   }
 
-  /**
-   * n
-   */
+  /** Returns regionInfo */
   public RegionInfo getRegion() {
     return regionInfo;
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java
index 3cd43ae70fd..c6af8e6ac53 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java
@@ -353,7 +353,7 @@ public class HTableDescriptor implements TableDescriptor, Comparable<HTableDescr
   }
 
   /**
-   * Get the name of the table n
+   * Get the name of the table
    */
   @Override
   public TableName getTableName() {
@@ -715,7 +715,7 @@ public class HTableDescriptor implements TableDescriptor, Comparable<HTableDescr
    * org.apache.hadoop.hbase.coprocessor.RegionCoprocessor. It won't check if the class can be
    * loaded or not. Whether a coprocessor is loadable or not will be determined when a region is
    * opened.
-   * @param className Full class name. n
+   * @param className Full class name.
    */
   public HTableDescriptor addCoprocessor(String className) throws IOException {
     getDelegateeForModification().setCoprocessor(className);
@@ -731,7 +731,7 @@ public class HTableDescriptor implements TableDescriptor, Comparable<HTableDescr
    *                    classloader.
    * @param className   Full class name.
    * @param priority    Priority
-   * @param kvs         Arbitrary key-value parameter pairs passed into the coprocessor. n
+   * @param kvs         Arbitrary key-value parameter pairs passed into the coprocessor.
    */
   public HTableDescriptor addCoprocessor(String className, Path jarFilePath, int priority,
     final Map<String, String> kvs) throws IOException {
@@ -747,7 +747,7 @@ public class HTableDescriptor implements TableDescriptor, Comparable<HTableDescr
    * loaded or not. Whether a coprocessor is loadable or not will be determined when a region is
    * opened.
    * @param specStr The Coprocessor specification all in in one String formatted so matches
-   *                {@link HConstants#CP_HTD_ATTR_VALUE_PATTERN} n
+   *                {@link HConstants#CP_HTD_ATTR_VALUE_PATTERN}
    */
   public HTableDescriptor addCoprocessorWithSpec(final String specStr) throws IOException {
     getDelegateeForModification().setCoprocessorWithSpec(specStr);
@@ -828,8 +828,8 @@ public class HTableDescriptor implements TableDescriptor, Comparable<HTableDescr
 
   /**
    * @param bytes A pb serialized {@link HTableDescriptor} instance with pb magic prefix
-   * @return An instance of {@link HTableDescriptor} made from <code>bytes</code> nn * @see
-   *         #toByteArray()
+   * @return An instance of {@link HTableDescriptor} made from <code>bytes</code>
+   * @see #toByteArray()
    */
   public static HTableDescriptor parseFrom(final byte[] bytes)
     throws DeserializationException, IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java
index 01b5f49a205..69e59b5b3c3 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/MetaTableAccessor.java
@@ -643,7 +643,7 @@ public class MetaTableAccessor {
   /**
    * @param connection connection we're using
    * @param serverName server whose regions we're interested in
-   * @return List of user regions installed on this server (does not include catalog regions). n
+   * @return List of user regions installed on this server (does not include catalog regions).
    */
   public static NavigableMap<RegionInfo, Result> getServerUserRegions(Connection connection,
     final ServerName serverName) throws IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/NotAllMetaRegionsOnlineException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/NotAllMetaRegionsOnlineException.java
index a15833ac17a..bc156353a1b 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/NotAllMetaRegionsOnlineException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/NotAllMetaRegionsOnlineException.java
@@ -34,8 +34,7 @@ public class NotAllMetaRegionsOnlineException extends DoNotRetryIOException {
   }
 
   /**
-   * n
-   */
+   *   */
   public NotAllMetaRegionsOnlineException(String message) {
     super(message);
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerLoad.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerLoad.java
index e7c267dc332..58fe5800051 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerLoad.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerLoad.java
@@ -392,7 +392,7 @@ public class ServerLoad implements ServerMetrics {
   }
 
   /**
-   * Call directly from client such as hbase shell n
+   * Call directly from client such as hbase shell
    */
   @Override
   public ReplicationLoadSink getReplicationLoadSink() {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerMetrics.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerMetrics.java
index a177ecbf3e9..4ba044056b5 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerMetrics.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/ServerMetrics.java
@@ -70,7 +70,7 @@ public interface ServerMetrics {
   Map<String, List<ReplicationLoadSource>> getReplicationLoadSourceMap();
 
   /**
-   * Call directly from client such as hbase shell n
+   * Call directly from client such as hbase shell
    */
   @Nullable
   ReplicationLoadSink getReplicationLoadSink();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java
index e6698afd9a2..4e202afc61a 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java
@@ -532,9 +532,10 @@ public interface Admin extends Abortable, Closeable {
    * Disable table and wait on completion. May timeout eventually. Use
    * {@link #disableTableAsync(org.apache.hadoop.hbase.TableName)} and
    * {@link #isTableDisabled(org.apache.hadoop.hbase.TableName)} instead. The table has to be in
-   * enabled state for it to be disabled. n * @throws IOException There could be couple types of
-   * IOException TableNotFoundException means the table doesn't exist. TableNotEnabledException
-   * means the table isn't in enabled state.
+   * enabled state for it to be disabled.
+   * @throws IOException There could be couple types of IOException TableNotFoundException means the
+   *                     table doesn't exist. TableNotEnabledException means the table isn't in
+   *                     enabled state.
    */
   default void disableTable(TableName tableName) throws IOException {
     get(disableTableAsync(tableName), getSyncWaitTimeout(), TimeUnit.MILLISECONDS);
@@ -905,7 +906,7 @@ public interface Admin extends Abortable, Closeable {
    * then it returns. It does not wait on the completion of Compaction (it can take a while).
    * @param tableName   table to compact
    * @param compactType {@link org.apache.hadoop.hbase.client.CompactType}
-   * @throws IOException if a remote or network exception occurs n
+   * @throws IOException if a remote or network exception occurs
    */
   void compact(TableName tableName, CompactType compactType)
     throws IOException, InterruptedException;
@@ -917,7 +918,7 @@ public interface Admin extends Abortable, Closeable {
    * @param tableName    table to compact
    * @param columnFamily column family within a table
    * @param compactType  {@link org.apache.hadoop.hbase.client.CompactType}
-   * @throws IOException if not a mob column family or if a remote or network exception occurs n
+   * @throws IOException if not a mob column family or if a remote or network exception occurs
    */
   void compact(TableName tableName, byte[] columnFamily, CompactType compactType)
     throws IOException, InterruptedException;
@@ -966,7 +967,7 @@ public interface Admin extends Abortable, Closeable {
    * while).
    * @param tableName   table to compact
    * @param compactType {@link org.apache.hadoop.hbase.client.CompactType}
-   * @throws IOException if a remote or network exception occurs n
+   * @throws IOException if a remote or network exception occurs
    */
   void majorCompact(TableName tableName, CompactType compactType)
     throws IOException, InterruptedException;
@@ -978,7 +979,7 @@ public interface Admin extends Abortable, Closeable {
    * @param tableName    table to compact
    * @param columnFamily column family within a table
    * @param compactType  {@link org.apache.hadoop.hbase.client.CompactType}
-   * @throws IOException if not a mob column family or if a remote or network exception occurs n
+   * @throws IOException if not a mob column family or if a remote or network exception occurs
    */
   void majorCompact(TableName tableName, byte[] columnFamily, CompactType compactType)
     throws IOException, InterruptedException;
@@ -989,10 +990,10 @@ public interface Admin extends Abortable, Closeable {
    * can take a while).
    * @param sn    the region server name
    * @param major if it's major compaction
-   * @throws IOException if a remote or network exception occurs n * @deprecated As of release
-   *                     2.0.0, this will be removed in HBase 3.0.0. Use
-   *                     {@link #compactRegionServer(ServerName)} or
-   *                     {@link #majorCompactRegionServer(ServerName)}.
+   * @throws IOException if a remote or network exception occurs
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use
+   *             {@link #compactRegionServer(ServerName)} or
+   *             {@link #majorCompactRegionServer(ServerName)}.
    */
   @Deprecated
   default void compactRegionServer(ServerName sn, boolean major)
@@ -2562,7 +2563,7 @@ public interface Admin extends Abortable, Closeable {
 
   /**
    * Return the set of supported security capabilities.
-   * @throws IOException if a remote or network exception occurs n
+   * @throws IOException if a remote or network exception occurs
    */
   List<SecurityCapability> getSecurityCapabilities() throws IOException;
 
@@ -2906,7 +2907,7 @@ public interface Admin extends Abortable, Closeable {
    * Clear compacting queues on a regionserver.
    * @param serverName the region server name
    * @param queues     the set of queue name
-   * @throws IOException if a remote or network exception occurs n
+   * @throws IOException if a remote or network exception occurs
    */
   void clearCompactionQueues(ServerName serverName, Set<String> queues)
     throws IOException, InterruptedException;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java
index bf1a29196db..6104fcee87b 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Append.java
@@ -61,7 +61,7 @@ public class Append extends Mutation {
    * <p>
    * This range is used as [minStamp, maxStamp).
    * @param minStamp minimum timestamp value, inclusive
-   * @param maxStamp maximum timestamp value, exclusive n
+   * @param maxStamp maximum timestamp value, exclusive
    */
   public Append setTimeRange(long minStamp, long maxStamp) {
     tr = new TimeRange(minStamp, maxStamp);
@@ -69,7 +69,7 @@ public class Append extends Mutation {
   }
 
   /**
-   * Gets the TimeRange used for this append. n
+   * Gets the TimeRange used for this append.
    */
   public TimeRange getTimeRange() {
     return this.tr;
@@ -81,7 +81,7 @@ public class Append extends Mutation {
   }
 
   /**
-   * n * True (default) if the append operation should return the results. A client that is not
+   * True (default) if the append operation should return the results. A client that is not
    * interested in the result can save network bandwidth setting this to false.
    */
   @Override
@@ -120,7 +120,7 @@ public class Append extends Mutation {
    * Create a Append operation for the specified row.
    * <p>
    * At least one column must be appended to.
-   * @param rowArray Makes a copy out of this buffer. nn
+   * @param rowArray Makes a copy out of this buffer.
    */
   public Append(final byte[] rowArray, final int rowOffset, final int rowLength) {
     checkRow(rowArray, rowOffset, rowLength);
@@ -142,9 +142,9 @@ public class Append extends Mutation {
    * Add the specified column and value to this Append operation.
    * @param family    family name
    * @param qualifier column qualifier
-   * @param value     value to append to specified column n * @deprecated As of release 2.0.0, this
-   *                  will be removed in HBase 3.0.0. Use {@link #addColumn(byte[], byte[], byte[])}
-   *                  instead
+   * @param value     value to append to specified column
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use
+   *             {@link #addColumn(byte[], byte[], byte[])} instead
    */
   @Deprecated
   public Append add(byte[] family, byte[] qualifier, byte[] value) {
@@ -155,7 +155,7 @@ public class Append extends Mutation {
    * Add the specified column and value to this Append operation.
    * @param family    family name
    * @param qualifier column qualifier
-   * @param value     value to append to specified column n
+   * @param value     value to append to specified column
    */
   public Append addColumn(byte[] family, byte[] qualifier, byte[] value) {
     KeyValue kv = new KeyValue(this.row, family, qualifier, this.ts, KeyValue.Type.Put, value);
@@ -163,7 +163,8 @@ public class Append extends Mutation {
   }
 
   /**
-   * Add column and value to this Append operation. n * @return This instance
+   * Add column and value to this Append operation.
+   * @return This instance
    */
   @SuppressWarnings("unchecked")
   public Append add(final Cell cell) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncAdmin.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncAdmin.java
index d1008e1c782..71000a4c0d2 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncAdmin.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncAdmin.java
@@ -198,7 +198,7 @@ public interface AsyncAdmin {
   CompletableFuture<Void> enableTable(TableName tableName);
 
   /**
-   * Disable a table. The table has to be in enabled state for it to be disabled. n
+   * Disable a table. The table has to be in enabled state for it to be disabled.
    */
   CompletableFuture<Void> disableTable(TableName tableName);
 
@@ -1098,7 +1098,7 @@ public interface AsyncAdmin {
   CompletableFuture<Void> stopMaster();
 
   /**
-   * Stop the designated regionserver. n
+   * Stop the designated regionserver.
    */
   CompletableFuture<Void> stopRegionServer(ServerName serverName);
 
@@ -1126,19 +1126,20 @@ public interface AsyncAdmin {
   CompletableFuture<Void> rollWALWriter(ServerName serverName);
 
   /**
-   * Clear compacting queues on a region server. n * @param queues the set of queue name
+   * Clear compacting queues on a region server.
+   * @param queues the set of queue name
    */
   CompletableFuture<Void> clearCompactionQueues(ServerName serverName, Set<String> queues);
 
   /**
-   * Get a list of {@link RegionMetrics} of all regions hosted on a region seerver. n * @return a
-   * list of {@link RegionMetrics} wrapped by {@link CompletableFuture}
+   * Get a list of {@link RegionMetrics} of all regions hosted on a region seerver.
+   * @return a list of {@link RegionMetrics} wrapped by {@link CompletableFuture}
    */
   CompletableFuture<List<RegionMetrics>> getRegionMetrics(ServerName serverName);
 
   /**
-   * Get a list of {@link RegionMetrics} of all regions hosted on a region seerver for a table. nn
-   * * @return a list of {@link RegionMetrics} wrapped by {@link CompletableFuture}
+   * Get a list of {@link RegionMetrics} of all regions hosted on a region seerver for a table.
+   * @return a list of {@link RegionMetrics} wrapped by {@link CompletableFuture}
    */
   CompletableFuture<List<RegionMetrics>> getRegionMetrics(ServerName serverName,
     TableName tableName);
@@ -1285,8 +1286,8 @@ public interface AsyncAdmin {
   CompletableFuture<Boolean> normalize(NormalizeTableFilterParams ntfp);
 
   /**
-   * Turn the cleaner chore on/off. n * @return Previous cleaner state wrapped by a
-   * {@link CompletableFuture}
+   * Turn the cleaner chore on/off.
+   * @return Previous cleaner state wrapped by a {@link CompletableFuture}
    */
   CompletableFuture<Boolean> cleanerChoreSwitch(boolean on);
 
@@ -1305,8 +1306,8 @@ public interface AsyncAdmin {
   CompletableFuture<Boolean> runCleanerChore();
 
   /**
-   * Turn the catalog janitor on/off. n * @return the previous state wrapped by a
-   * {@link CompletableFuture}
+   * Turn the catalog janitor on/off.
+   * @return the previous state wrapped by a {@link CompletableFuture}
    */
   CompletableFuture<Boolean> catalogJanitorSwitch(boolean on);
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionImpl.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionImpl.java
index 7acaa809d99..2e5d1813aa6 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionImpl.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncConnectionImpl.java
@@ -180,7 +180,7 @@ class AsyncConnectionImpl implements AsyncConnection {
   }
 
   /**
-   * If choreService has not been created yet, create the ChoreService. n
+   * If choreService has not been created yet, create the ChoreService.
    */
   synchronized ChoreService getChoreService() {
     if (isClosed()) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncProcess.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncProcess.java
index 77d0d985467..65e5611db6b 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncProcess.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncProcess.java
@@ -203,7 +203,7 @@ class AsyncProcess {
    * The submitted task may be not accomplished at all if there are too many running tasks or other
    * limits.
    * @param <CResult> The class to cast the result
-   * @param task      The setting and data n
+   * @param task      The setting and data
    */
   public <CResult> AsyncRequestFuture submit(AsyncProcessTask<CResult> task)
     throws InterruptedIOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
index 1cb3b1cfe8d..b5a9fd03130 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
@@ -91,7 +91,7 @@ public abstract class ClientScanner extends AbstractClientScanner {
    * @param conf       The {@link Configuration} to use.
    * @param scan       {@link Scan} to use in this scanner
    * @param tableName  The table that we wish to scan
-   * @param connection Connection identifying the cluster n
+   * @param connection Connection identifying the cluster
    */
   public ClientScanner(final Configuration conf, final Scan scan, final TableName tableName,
     ClusterConnection connection, RpcRetryingCallerFactory rpcFactory,
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClusterConnection.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClusterConnection.java
index e2b5bdbbc72..30de5370e74 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClusterConnection.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClusterConnection.java
@@ -55,8 +55,8 @@ public interface ClusterConnection extends Connection {
   /**
    * Use this api to check if the table has been created with the specified number of splitkeys
    * which was used while creating the given table. Note : If this api is used after a table's
-   * region gets splitted, the api may return false. n * tableName n * splitKeys used while creating
-   * table n * if a remote or network exception occurs
+   * region gets splitted, the api may return false. tableName splitKeys used while creating table
+   * if a remote or network exception occurs
    */
   boolean isTableAvailable(TableName tableName, byte[][] splitKeys) throws IOException;
 
@@ -255,7 +255,7 @@ public interface ClusterConnection extends Connection {
    * Returns a new RpcRetryingCallerFactory from the given {@link Configuration}. This
    * RpcRetryingCallerFactory lets the users create {@link RpcRetryingCaller}s which can be
    * intercepted with the configured {@link RetryingCallerInterceptor}
-   * @param conf configuration n
+   * @param conf configuration
    */
   RpcRetryingCallerFactory getNewRpcRetryingCallerFactory(Configuration conf);
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptor.java
index 4e025eabe66..34cf3f97962 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptor.java
@@ -126,7 +126,7 @@ public interface ColumnFamilyDescriptor {
   int getMinVersions();
 
   /**
-   * Get the mob compact partition policy for this family n
+   * Get the mob compact partition policy for this family
    */
   MobCompactPartitionPolicy getMobCompactPartitionPolicy();
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java
index 92a69628d14..e80e12c7c28 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ColumnFamilyDescriptorBuilder.java
@@ -816,8 +816,8 @@ public class ColumnFamilyDescriptorBuilder {
 
     /**
      * Set whether the tags should be compressed along with DataBlockEncoding. When no
-     * DataBlockEncoding is been used, this is having no effect. n * @return this (for chained
-     * invocation)
+     * DataBlockEncoding is been used, this is having no effect.
+     * @return this (for chained invocation)
      */
     public ModifyableColumnFamilyDescriptor setCompressTags(boolean compressTags) {
       return setValue(COMPRESS_TAGS_BYTES, String.valueOf(compressTags));
@@ -1195,7 +1195,7 @@ public class ColumnFamilyDescriptorBuilder {
      * @param bytes A pb serialized {@link ModifyableColumnFamilyDescriptor} instance with pb magic
      *              prefix
      * @return An instance of {@link ModifyableColumnFamilyDescriptor} made from <code>bytes</code>
-     *         n * @see #toByteArray()
+     * @see #toByteArray()
      */
     private static ColumnFamilyDescriptor parseFrom(final byte[] bytes)
       throws DeserializationException {
@@ -1241,8 +1241,8 @@ public class ColumnFamilyDescriptorBuilder {
     }
 
     /**
-     * Remove a configuration setting represented by the key from the {@link #configuration} map. n
-     * * @return this (for chained invocation)
+     * Remove a configuration setting represented by the key from the {@link #configuration} map.
+     * @return this (for chained invocation)
      */
     public ModifyableColumnFamilyDescriptor removeConfiguration(final String key) {
       return setConfiguration(key, null);
@@ -1254,8 +1254,8 @@ public class ColumnFamilyDescriptorBuilder {
     }
 
     /**
-     * Set the encryption algorithm for use with this family n * @return this (for chained
-     * invocation)
+     * Set the encryption algorithm for use with this family
+     * @return this (for chained invocation)
      */
     public ModifyableColumnFamilyDescriptor setEncryptionType(String algorithm) {
       return setValue(ENCRYPTION_BYTES, algorithm);
@@ -1267,7 +1267,8 @@ public class ColumnFamilyDescriptorBuilder {
     }
 
     /**
-     * Set the raw crypto key attribute for the family n * @return this (for chained invocation)
+     * Set the raw crypto key attribute for the family
+     * @return this (for chained invocation)
      */
     public ModifyableColumnFamilyDescriptor setEncryptionKey(byte[] keyBytes) {
       return setValue(ENCRYPTION_KEY_BYTES, new Bytes(keyBytes));
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
index 909d045759a..b7597d5eece 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ConnectionImplementation.java
@@ -599,7 +599,7 @@ class ConnectionImplementation implements ClusterConnection, Closeable {
   }
 
   /**
-   * If choreService has not been created yet, create the ChoreService. n
+   * If choreService has not been created yet, create the ChoreService.
    */
   synchronized ChoreService getChoreService() {
     if (choreService == null) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Delete.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Delete.java
index 8dabf0671a0..1f0893d3a33 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Delete.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Delete.java
@@ -95,7 +95,7 @@ public class Delete extends Mutation {
    * <p>
    * This timestamp is ONLY used for a delete row operation. If specifying families or columns, you
    * must specify each timestamp individually.
-   * @param row We make a local copy of this passed in row. nn
+   * @param row We make a local copy of this passed in row.
    */
   public Delete(final byte[] row, final int rowOffset, final int rowLength) {
     this(row, rowOffset, rowLength, HConstants.LATEST_TIMESTAMP);
@@ -109,8 +109,8 @@ public class Delete extends Mutation {
    * <p>
    * This timestamp is ONLY used for a delete row operation. If specifying families or columns, you
    * must specify each timestamp individually.
-   * @param row We make a local copy of this passed in row. nn * @param timestamp maximum version
-   *            timestamp (only for delete row)
+   * @param row       We make a local copy of this passed in row.
+   * @param timestamp maximum version timestamp (only for delete row)
    */
   public Delete(final byte[] row, final int rowOffset, final int rowLength, long timestamp) {
     checkRow(row, rowOffset, rowLength);
@@ -140,8 +140,9 @@ public class Delete extends Mutation {
   /**
    * Advanced use only. Add an existing delete marker to this Delete object.
    * @param kv An existing KeyValue of type "delete".
-   * @return this for invocation chaining n * @deprecated As of release 2.0.0, this will be removed
-   *         in HBase 3.0.0. Use {@link #add(Cell)} instead
+   * @return this for invocation chaining
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use {@link #add(Cell)}
+   *             instead
    */
   @SuppressWarnings("unchecked")
   @Deprecated
@@ -152,7 +153,7 @@ public class Delete extends Mutation {
   /**
    * Add an existing delete marker to this Delete object.
    * @param cell An existing cell of type "delete".
-   * @return this for invocation chaining n
+   * @return this for invocation chaining
    */
   public Delete add(Cell cell) throws IOException {
     super.add(cell);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Get.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Get.java
index 0672faeb73e..3fe7b18799c 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Get.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Get.java
@@ -87,7 +87,7 @@ public class Get extends Query implements Row {
   }
 
   /**
-   * Copy-constructor n
+   * Copy-constructor
    */
   public Get(Get get) {
     this(get.getRow());
@@ -126,7 +126,7 @@ public class Get extends Query implements Row {
   }
 
   /**
-   * Create a Get operation for the specified row. nnn
+   * Create a Get operation for the specified row.
    */
   public Get(byte[] row, int rowOffset, int rowLength) {
     Mutation.checkRow(row, rowOffset, rowLength);
@@ -134,7 +134,7 @@ public class Get extends Query implements Row {
   }
 
   /**
-   * Create a Get operation for the specified row. n
+   * Create a Get operation for the specified row.
    */
   public Get(ByteBuffer row) {
     Mutation.checkRow(row);
@@ -208,7 +208,8 @@ public class Get extends Query implements Row {
   /**
    * Get versions of columns only within the specified timestamp range, [minStamp, maxStamp).
    * @param minStamp minimum timestamp value, inclusive
-   * @param maxStamp maximum timestamp value, exclusive n * @return this for invocation chaining
+   * @param maxStamp maximum timestamp value, exclusive
+   * @return this for invocation chaining
    */
   public Get setTimeRange(long minStamp, long maxStamp) throws IOException {
     tr = new TimeRange(minStamp, maxStamp);
@@ -351,7 +352,7 @@ public class Get extends Query implements Row {
   }
 
   /**
-   * Method for retrieving the get's row n
+   * Method for retrieving the get's row
    */
   @Override
   public byte[] getRow() {
@@ -383,7 +384,7 @@ public class Get extends Query implements Row {
   }
 
   /**
-   * Method for retrieving the get's TimeRange n
+   * Method for retrieving the get's TimeRange
    */
   public TimeRange getTimeRange() {
     return this.tr;
@@ -414,7 +415,7 @@ public class Get extends Query implements Row {
   }
 
   /**
-   * Method for retrieving the get's familyMap n
+   * Method for retrieving the get's familyMap
    */
   public Map<byte[], NavigableSet<byte[]>> getFamilyMap() {
     return this.familyMap;
@@ -422,7 +423,7 @@ public class Get extends Query implements Row {
 
   /**
    * Compile the table and column family (i.e. schema) information into a String. Useful for parsing
-   * and aggregation by debugging, logging, and administration tools. n
+   * and aggregation by debugging, logging, and administration tools.
    */
   @Override
   public Map<String, Object> getFingerprint() {
@@ -439,7 +440,7 @@ public class Get extends Query implements Row {
    * Compile the details beyond the scope of getFingerprint (row, columns, timestamps, etc.) into a
    * Map along with the fingerprinted information. Useful for debugging, logging, and administration
    * tools.
-   * @param maxCols a limit on the number of columns output prior to truncation n
+   * @param maxCols a limit on the number of columns output prior to truncation
    */
   @Override
   public Map<String, Object> toMap(int maxCols) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
index 915367127fc..2bb10385cfc 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
@@ -1124,7 +1124,7 @@ public class HBaseAdmin implements Admin {
   }
 
   /**
-   * n * @return List of {@link HRegionInfo}.
+   * @return List of {@link HRegionInfo}.
    * @throws IOException if a remote or network exception occurs
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link #getRegions(ServerName)}.
@@ -1348,7 +1348,7 @@ public class HBaseAdmin implements Admin {
    * @param regionName   region to compact
    * @param columnFamily column family within a table or region
    * @param major        True if we are to do a major compaction.
-   * @throws IOException if a remote or network exception occurs n
+   * @throws IOException if a remote or network exception occurs
    */
   private void compactRegion(final byte[] regionName, final byte[] columnFamily,
     final boolean major) throws IOException {
@@ -2309,7 +2309,7 @@ public class HBaseAdmin implements Admin {
   }
 
   /**
-   * n * @return List of {@link HRegionInfo}.
+   * @return List of {@link HRegionInfo}.
    * @throws IOException if a remote or network exception occurs
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0 Use
    *             {@link #getRegions(TableName)}.
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableMultiplexer.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableMultiplexer.java
index 0ba1bf8a8f6..5bf8dbe104a 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableMultiplexer.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HTableMultiplexer.java
@@ -134,8 +134,8 @@ public class HTableMultiplexer {
 
   /**
    * The put request will be buffered by its corresponding buffer queue. Return false if the queue
-   * is already full. nn * @return true if the request can be accepted by its corresponding buffer
-   * queue.
+   * is already full.
+   * @return true if the request can be accepted by its corresponding buffer queue.
    */
   public boolean put(TableName tableName, final Put put) {
     return put(tableName, put, this.maxAttempts);
@@ -143,7 +143,8 @@ public class HTableMultiplexer {
 
   /**
    * The puts request will be buffered by their corresponding buffer queue. Return the list of puts
-   * which could not be queued. nn * @return the list of puts which could not be queued
+   * which could not be queued.
+   * @return the list of puts which could not be queued
    */
   public List<Put> put(TableName tableName, final List<Put> puts) {
     if (puts == null) return null;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHColumnDescriptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHColumnDescriptor.java
index 5f758c7a5e1..6564601b22c 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHColumnDescriptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHColumnDescriptor.java
@@ -28,7 +28,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 @InterfaceAudience.Private
 public class ImmutableHColumnDescriptor extends HColumnDescriptor {
   /*
-   * Create an unmodifyable copy of an HColumnDescriptor n
+   * Create an unmodifyable copy of an HColumnDescriptor
    */
   ImmutableHColumnDescriptor(final HColumnDescriptor desc) {
     super(desc, false);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHRegionInfo.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHRegionInfo.java
index f95dbeb001e..952ac4f7719 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHRegionInfo.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHRegionInfo.java
@@ -28,7 +28,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public class ImmutableHRegionInfo extends HRegionInfo {
 
   /*
-   * Creates an immutable copy of an HRegionInfo. n
+   * Creates an immutable copy of an HRegionInfo.
    */
   public ImmutableHRegionInfo(RegionInfo other) {
     super(other);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHTableDescriptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHTableDescriptor.java
index 2cce334e359..9200c85daa1 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHTableDescriptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ImmutableHTableDescriptor.java
@@ -41,7 +41,7 @@ public class ImmutableHTableDescriptor extends HTableDescriptor {
   }
 
   /*
-   * Create an unmodifyable copy of an HTableDescriptor n
+   * Create an unmodifyable copy of an HTableDescriptor
    */
   public ImmutableHTableDescriptor(final HTableDescriptor desc) {
     super(desc, false);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Increment.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Increment.java
index 0efd71e69d2..49361cec743 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Increment.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Increment.java
@@ -92,7 +92,8 @@ public class Increment extends Mutation {
 
   /**
    * Add the specified KeyValue to this operation.
-   * @param cell individual Cell n * @throws java.io.IOException e
+   * @param cell individual Cell
+   * @throws java.io.IOException e
    */
   public Increment add(Cell cell) throws IOException {
     super.add(cell);
@@ -120,7 +121,7 @@ public class Increment extends Mutation {
   }
 
   /**
-   * Gets the TimeRange used for this increment. n
+   * Gets the TimeRange used for this increment.
    */
   public TimeRange getTimeRange() {
     return this.tr;
@@ -138,7 +139,7 @@ public class Increment extends Mutation {
    * This range is used as [minStamp, maxStamp).
    * @param minStamp minimum timestamp value, inclusive
    * @param maxStamp maximum timestamp value, exclusive
-   * @throws IOException if invalid time range n
+   * @throws IOException if invalid time range
    */
   public Increment setTimeRange(long minStamp, long maxStamp) throws IOException {
     tr = new TimeRange(minStamp, maxStamp);
@@ -208,8 +209,7 @@ public class Increment extends Mutation {
   }
 
   /**
-   * n
-   */
+   *   */
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MasterCallable.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MasterCallable.java
index 7a919f5ad5f..e7c600ee50b 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MasterCallable.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MasterCallable.java
@@ -107,7 +107,7 @@ abstract class MasterCallable<V> implements RetryingCallable<V>, Closeable {
    * configured to make this rpc call, use getRpcController(). We are trying to contain
    * rpcController references so we don't pollute codebase with protobuf references; keep the
    * protobuf references contained and only present in a few classes rather than all about the code
-   * base. n
+   * base.
    */
   protected abstract V rpcCall() throws Exception;
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaCache.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaCache.java
index dd19588d307..e0b3240b023 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaCache.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MetaCache.java
@@ -186,9 +186,7 @@ public class MetaCache {
     }
   }
 
-  /**
-   * n * @return Map of cached locations for passed <code>tableName</code>
-   */
+  /** Returns Map of cached locations for passed <code>tableName</code> */
   private ConcurrentNavigableMap<byte[], RegionLocations>
     getTableLocations(final TableName tableName) {
     // find the map of cached locations for this table
@@ -287,7 +285,7 @@ public class MetaCache {
 
   /**
    * Delete a cached location, no matter what it is. Called when we were told to not use cache.
-   * @param tableName tableName n
+   * @param tableName tableName
    */
   public void clearCache(final TableName tableName, final byte[] row) {
     ConcurrentMap<byte[], RegionLocations> tableLocations = getTableLocations(tableName);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiAction.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiAction.java
index cc3db106c4e..f224d1fc66f 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiAction.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiAction.java
@@ -60,7 +60,7 @@ public final class MultiAction {
   /**
    * Add an Action to this container based on it's regionName. If the regionName is wrong, the
    * initial execution will fail, but will be automatically retried after looking up the correct
-   * region. nn
+   * region.
    */
   public void add(byte[] regionName, Action a) {
     add(regionName, Collections.singletonList(a));
@@ -69,7 +69,8 @@ public final class MultiAction {
   /**
    * Add an Action to this container based on it's regionName. If the regionName is wrong, the
    * initial execution will fail, but will be automatically retried after looking up the correct
-   * region. n * @param actionList list of actions to add for the region
+   * region.
+   * @param actionList list of actions to add for the region
    */
   public void add(byte[] regionName, List<Action> actionList) {
     List<Action> rsActions = actions.get(regionName);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiResponse.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiResponse.java
index b768b76fdb6..37f5cbe695d 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiResponse.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MultiResponse.java
@@ -54,9 +54,9 @@ public class MultiResponse extends AbstractResponse {
   }
 
   /**
-   * Add the pair to the container, grouped by the regionName n * @param originalIndex the original
-   * index of the Action (request).
-   * @param resOrEx the result or error; will be empty for successful Put and Delete actions.
+   * Add the pair to the container, grouped by the regionName
+   * @param originalIndex the original index of the Action (request).
+   * @param resOrEx       the result or error; will be empty for successful Put and Delete actions.
    */
   public void add(byte[] regionName, int originalIndex, Object resOrEx) {
     getResult(regionName).addResult(originalIndex, resOrEx);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MutableRegionInfo.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MutableRegionInfo.java
index 7627f8dc0e5..a9382f3a9be 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MutableRegionInfo.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/MutableRegionInfo.java
@@ -179,7 +179,7 @@ class MutableRegionInfo implements RegionInfo {
   }
 
   /**
-   * Get current table name of the region n
+   * Get current table name of the region
    */
   @Override
   public TableName getTable() {
@@ -230,7 +230,8 @@ class MutableRegionInfo implements RegionInfo {
   }
 
   /**
-   * @param split set split status n
+   * Change the split status flag.
+   * @param split set split status
    */
   public MutableRegionInfo setSplit(boolean split) {
     this.split = split;
@@ -251,7 +252,7 @@ class MutableRegionInfo implements RegionInfo {
   /**
    * The parent of a region split is offline while split daughters hold references to the parent.
    * Offlined regions are closed.
-   * @param offLine Set online/offline status. n
+   * @param offLine Set online/offline status.
    */
   public MutableRegionInfo setOffline(boolean offLine) {
     this.offLine = offLine;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
index 408b02e44fa..16faf8576f1 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Mutation.java
@@ -161,8 +161,8 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Create a KeyValue with this objects row key and the Put identifier. nnnn * @param tags -
-   * Specify the Tags as an Array
+   * Create a KeyValue with this objects row key and the Put identifier.
+   * @param tags - Specify the Tags as an Array
    * @return a KeyValue with this objects row key and the Put identifier.
    */
   KeyValue createPutKeyValue(byte[] family, byte[] qualifier, long ts, byte[] value, Tag[] tags) {
@@ -183,7 +183,7 @@ public abstract class Mutation extends OperationWithAttributes
 
   /**
    * Compile the column family (i.e. schema) information into a Map. Useful for parsing and
-   * aggregation by debugging, logging, and administration tools. n
+   * aggregation by debugging, logging, and administration tools.
    */
   @Override
   public Map<String, Object> getFingerprint() {
@@ -202,7 +202,7 @@ public abstract class Mutation extends OperationWithAttributes
    * Compile the details beyond the scope of getFingerprint (row, columns, timestamps, etc.) into a
    * Map along with the fingerprinted information. Useful for debugging, logging, and administration
    * tools.
-   * @param maxCols a limit on the number of columns output prior to truncation n
+   * @param maxCols a limit on the number of columns output prior to truncation
    */
   @Override
   public Map<String, Object> toMap(int maxCols) {
@@ -265,7 +265,7 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Set the durability for this mutation n
+   * Set the durability for this mutation
    */
   public Mutation setDurability(Durability d) {
     this.durability = d;
@@ -278,7 +278,7 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Method for retrieving the put's familyMap n
+   * Method for retrieving the put's familyMap
    */
   public NavigableMap<byte[], List<Cell>> getFamilyCellMap() {
     return this.familyMap;
@@ -306,7 +306,7 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Method for retrieving the delete's row n
+   * Method for retrieving the delete's row
    */
   @Override
   public byte[] getRow() {
@@ -324,8 +324,9 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Method for retrieving the timestamp n * @deprecated As of release 2.0.0, this will be removed
-   * in HBase 3.0.0. Use {@link #getTimestamp()} instead
+   * Method for retrieving the timestamp
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use
+   *             {@link #getTimestamp()} instead
    */
   @Deprecated
   public long getTimeStamp() {
@@ -333,7 +334,7 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Method for retrieving the timestamp. n
+   * Method for retrieving the timestamp.
    */
   public long getTimestamp() {
     return this.ts;
@@ -369,7 +370,7 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Sets the visibility expression associated with cells in this Mutation. n
+   * Sets the visibility expression associated with cells in this Mutation.
    */
   public Mutation setCellVisibility(CellVisibility expression) {
     this.setAttribute(VisibilityConstants.VISIBILITY_LABELS_ATTR_KEY,
@@ -385,8 +386,8 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Create a protocol buffer CellVisibility based on a client CellVisibility. n * @return a
-   * protocol buffer CellVisibility
+   * Create a protocol buffer CellVisibility based on a client CellVisibility.
+   * @return a protocol buffer CellVisibility
    */
   static ClientProtos.CellVisibility toCellVisibility(CellVisibility cellVisibility) {
     ClientProtos.CellVisibility.Builder builder = ClientProtos.CellVisibility.newBuilder();
@@ -395,8 +396,8 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Convert a protocol buffer CellVisibility to a client CellVisibility n * @return the converted
-   * client CellVisibility
+   * Convert a protocol buffer CellVisibility to a client CellVisibility
+   * @return the converted client CellVisibility
    */
   private static CellVisibility toCellVisibility(ClientProtos.CellVisibility proto) {
     if (proto == null) return null;
@@ -404,8 +405,8 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * Convert a protocol buffer CellVisibility bytes to a client CellVisibility n * @return the
-   * converted client CellVisibility n
+   * Convert a protocol buffer CellVisibility bytes to a client CellVisibility
+   * @return the converted client CellVisibility
    */
   private static CellVisibility toCellVisibility(byte[] protoBytes)
     throws DeserializationException {
@@ -510,7 +511,7 @@ public abstract class Mutation extends OperationWithAttributes
 
   /**
    * Set the TTL desired for the result of the mutation, in milliseconds.
-   * @param ttl the TTL desired for the result of the mutation, in milliseconds n
+   * @param ttl the TTL desired for the result of the mutation, in milliseconds
    */
   public Mutation setTTL(long ttl) {
     setAttribute(OP_ATTRIBUTE_TTL, Bytes.toBytes(ttl));
@@ -626,8 +627,8 @@ public abstract class Mutation extends OperationWithAttributes
 
   /*
    * Private method to determine if this object's familyMap contains the given value assigned to the
-   * given family, qualifier and timestamp respecting the 2 boolean arguments nnnnnn * @return
-   * returns true if the given family, qualifier timestamp and value already has an existing
+   * given family, qualifier and timestamp respecting the 2 boolean arguments
+   * @return returns true if the given family, qualifier timestamp and value already has an existing
    * KeyValue object in the family map.
    */
   protected boolean has(byte[] family, byte[] qualifier, long ts, byte[] value, boolean ignoreTS,
@@ -689,8 +690,9 @@ public abstract class Mutation extends OperationWithAttributes
   }
 
   /**
-   * @param row Row to check nn * @throws IllegalArgumentException Thrown if <code>row</code> is
-   *            empty or null or &gt; {@link HConstants#MAX_ROW_LENGTH}
+   * @param row Row to check
+   * @throws IllegalArgumentException Thrown if <code>row</code> is empty or null or &gt;
+   *                                  {@link HConstants#MAX_ROW_LENGTH}
    * @return <code>row</code>
    */
   static byte[] checkRow(final byte[] row, final int offset, final int length) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Operation.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Operation.java
index a517f0bb43a..2cad5ef7325 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Operation.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Operation.java
@@ -94,7 +94,7 @@ public abstract class Operation {
   /**
    * Produces a string representation of this Operation. It defaults to a JSON representation, but
    * falls back to a string representation of the fingerprint and details in the case of a JSON
-   * encoding failure. n
+   * encoding failure.
    */
   @Override
   public String toString() {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java
index e34c9d6eacb..33c1d853e1a 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/OperationWithAttributes.java
@@ -106,7 +106,7 @@ public abstract class OperationWithAttributes extends Operation implements Attri
    * This method allows you to set an identifier on an operation. The original motivation for this
    * was to allow the identifier to be used in slow query logging, but this could obviously be
    * useful in other places. One use of this could be to put a class.method identifier in here to
-   * see where the slow query is coming from. n * id to set for the scan
+   * see where the slow query is coming from. id to set for the scan
    */
   public OperationWithAttributes setId(String id) {
     setAttribute(ID_ATRIBUTE, Bytes.toBytes(id));
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.java
index 46770fc4e74..b272aa56edd 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.java
@@ -131,7 +131,7 @@ class PreemptiveFastFailInterceptor extends RetryingCallerInterceptor {
   /**
    * Handles failures encountered when communicating with a server. Updates the FailureInfo in
    * repeatedFailuresMap to reflect the failure. Throws RepeatedConnectException if the client is in
-   * Fast fail mode. nn * - the throwable to be handled. n
+   * Fast fail mode. - the throwable to be handled.
    */
   protected void handleFailureToServer(ServerName serverName, Throwable t) {
     if (serverName == null || t == null) {
@@ -200,7 +200,8 @@ class PreemptiveFastFailInterceptor extends RetryingCallerInterceptor {
   /**
    * Checks to see if we are in the Fast fail mode for requests to the server. If a client is unable
    * to contact a server for more than fastFailThresholdMilliSec the client will get into fast fail
-   * mode. n * @return true if the client is in fast fail mode for the server.
+   * mode.
+   * @return true if the client is in fast fail mode for the server.
    */
   private boolean inFastFailMode(ServerName server) {
     FailureInfo fInfo = repeatedFailuresMap.get(server);
@@ -224,7 +225,7 @@ class PreemptiveFastFailInterceptor extends RetryingCallerInterceptor {
    * Check to see if the client should try to connnect to the server, inspite of knowing that it is
    * in the fast fail mode. The idea here is that we want just one client thread to be actively
    * trying to reconnect, while all the other threads trying to reach the server will short circuit.
-   * n * @return true if the client should try to connect to the server.
+   * @return true if the client should try to connect to the server.
    */
   protected boolean shouldRetryInspiteOfFastFail(FailureInfo fInfo) {
     // We believe that the server is down, But, we want to have just one
@@ -245,7 +246,7 @@ class PreemptiveFastFailInterceptor extends RetryingCallerInterceptor {
   }
 
   /**
-   * This function updates the Failure info for a particular server after the attempt to nnnn
+   * This function updates the Failure info for a particular server after the attempt to
    */
   private void updateFailureInfoForServer(ServerName server, FailureInfo fInfo, boolean didTry,
     boolean couldNotCommunicate, boolean retryDespiteFastFailMode) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Put.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Put.java
index a3502f29bd0..e01d2085d4d 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Put.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Put.java
@@ -60,7 +60,7 @@ public class Put extends Mutation implements HeapSize {
   }
 
   /**
-   * We make a copy of the passed in row key to keep local. nnn
+   * We make a copy of the passed in row key to keep local.
    */
   public Put(byte[] rowArray, int rowOffset, int rowLength) {
     this(rowArray, rowOffset, rowLength, HConstants.LATEST_TIMESTAMP);
@@ -88,7 +88,7 @@ public class Put extends Mutation implements HeapSize {
   }
 
   /**
-   * We make a copy of the passed in row key to keep local. nnnn
+   * We make a copy of the passed in row key to keep local.
    */
   public Put(byte[] rowArray, int rowOffset, int rowLength, long ts) {
     checkRow(rowArray, rowOffset, rowLength);
@@ -155,7 +155,7 @@ public class Put extends Mutation implements HeapSize {
    * Add the specified column and value to this Put operation.
    * @param family    family name
    * @param qualifier column qualifier
-   * @param value     column value n
+   * @param value     column value
    */
   public Put addColumn(byte[] family, byte[] qualifier, byte[] value) {
     return addColumn(family, qualifier, this.ts, value);
@@ -178,7 +178,7 @@ public class Put extends Mutation implements HeapSize {
    * @param family    family name
    * @param qualifier column qualifier
    * @param ts        version timestamp
-   * @param value     column value n
+   * @param value     column value
    */
   public Put addColumn(byte[] family, byte[] qualifier, long ts, byte[] value) {
     if (ts < 0) {
@@ -222,7 +222,7 @@ public class Put extends Mutation implements HeapSize {
    * @param family    family name
    * @param qualifier column qualifier
    * @param ts        version timestamp
-   * @param value     column value n
+   * @param value     column value
    */
   public Put addColumn(byte[] family, ByteBuffer qualifier, long ts, ByteBuffer value) {
     if (ts < 0) {
@@ -255,7 +255,8 @@ public class Put extends Mutation implements HeapSize {
   /**
    * Add the specified KeyValue to this Put operation. Operation assumes that the passed KeyValue is
    * immutable and its backing array will not be modified for the duration of this Put.
-   * @param cell individual cell n * @throws java.io.IOException e
+   * @param cell individual cell
+   * @throws java.io.IOException e
    */
   public Put add(Cell cell) throws IOException {
     super.add(cell);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Query.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Query.java
index d752693dabc..97f687857f0 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Query.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Query.java
@@ -47,9 +47,6 @@ public abstract class Query extends OperationWithAttributes {
   protected Map<byte[], TimeRange> colFamTimeRangeMap = Maps.newTreeMap(Bytes.BYTES_COMPARATOR);
   protected Boolean loadColumnFamiliesOnDemand = null;
 
-  /**
-   * n
-   */
   public Filter getFilter() {
     return filter;
   }
@@ -67,7 +64,7 @@ public abstract class Query extends OperationWithAttributes {
   }
 
   /**
-   * Sets the authorizations to be used by this Query n
+   * Sets the authorizations to be used by this Query
    */
   public Query setAuthorizations(Authorizations authorizations) {
     this.setAttribute(VisibilityConstants.VISIBILITY_LABELS_ATTR_KEY,
@@ -131,7 +128,7 @@ public abstract class Query extends OperationWithAttributes {
    * Specify region replica id where Query will fetch data from. Use this together with
    * {@link #setConsistency(Consistency)} passing {@link Consistency#TIMELINE} to read data from a
    * specific replicaId. <br>
-   * <b> Expert: </b>This is an advanced API exposed. Only use it if you know what you are doing n
+   * <b> Expert: </b>This is an advanced API exposed. Only use it if you know what you are doing
    */
   public Query setReplicaId(int Id) {
     this.targetReplicaId = Id;
@@ -208,7 +205,7 @@ public abstract class Query extends OperationWithAttributes {
    * Column Family time ranges take precedence over the global time range.
    * @param cf       the column family for which you want to restrict
    * @param minStamp minimum timestamp value, inclusive
-   * @param maxStamp maximum timestamp value, exclusive n
+   * @param maxStamp maximum timestamp value, exclusive
    */
 
   public Query setColumnFamilyTimeRange(byte[] cf, long minStamp, long maxStamp) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionAdminServiceCallable.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionAdminServiceCallable.java
index 8b2ed345306..fea19680034 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionAdminServiceCallable.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionAdminServiceCallable.java
@@ -184,7 +184,7 @@ public abstract class RegionAdminServiceCallable<T> implements RetryingCallable<
    * Run RPC call.
    * @param rpcController PayloadCarryingRpcController is a mouthful but it at a minimum is a facade
    *                      on protobuf so we don't have to put protobuf everywhere; we can keep it
-   *                      behind this class. n
+   *                      behind this class.
    */
   protected abstract T call(HBaseRpcController rpcController) throws Exception;
 }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionInfoDisplay.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionInfoDisplay.java
index 58163a2d74a..3f353b5799d 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionInfoDisplay.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionInfoDisplay.java
@@ -59,7 +59,8 @@ public class RegionInfoDisplay {
   }
 
   /**
-   * Get the start key for display. Optionally hide the real start key. nn * @return the startkey
+   * Get the start key for display. Optionally hide the real start key.
+   * @return the startkey
    */
   public static byte[] getStartKeyForDisplay(RegionInfo ri, Configuration conf) {
     boolean displayKey = conf.getBoolean(DISPLAY_KEYS_KEY, true);
@@ -68,15 +69,16 @@ public class RegionInfoDisplay {
   }
 
   /**
-   * Get the region name for display. Optionally hide the start key. nn * @return region name as
-   * String
+   * Get the region name for display. Optionally hide the start key.
+   * @return region name as String
    */
   public static String getRegionNameAsStringForDisplay(RegionInfo ri, Configuration conf) {
     return Bytes.toStringBinary(getRegionNameForDisplay(ri, conf));
   }
 
   /**
-   * Get the region name for display. Optionally hide the start key. nn * @return region name bytes
+   * Get the region name for display. Optionally hide the start key.
+   * @return region name bytes
    */
   public static byte[] getRegionNameForDisplay(RegionInfo ri, Configuration conf) {
     boolean displayKey = conf.getBoolean(DISPLAY_KEYS_KEY, true);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionReplicaUtil.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionReplicaUtil.java
index 4475a01c0f9..5cae32fe241 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionReplicaUtil.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionReplicaUtil.java
@@ -51,7 +51,8 @@ public class RegionReplicaUtil {
   /**
    * Returns the RegionInfo for the given replicaId. RegionInfo's correspond to a range of a table,
    * but more than one "instance" of the same range can be deployed which are differentiated by the
-   * replicaId. n * @param replicaId the replicaId to use
+   * replicaId.
+   * @param replicaId the replicaId to use
    * @return an RegionInfo object corresponding to the same range (table, start and end key), but
    *         for the given replicaId.
    */
@@ -84,7 +85,7 @@ public class RegionReplicaUtil {
   }
 
   /**
-   * Removes the non-default replicas from the passed regions collection n
+   * Removes the non-default replicas from the passed regions collection
    */
   public static void removeNonDefaultRegions(Collection<RegionInfo> regions) {
     Iterator<RegionInfo> iterator = regions.iterator();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionServerCallable.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionServerCallable.java
index abe4058b99d..a97c6da80ae 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionServerCallable.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RegionServerCallable.java
@@ -132,7 +132,7 @@ public abstract class RegionServerCallable<T, S> implements RetryingCallable<T>
    * configured to make this rpc call, use getRpcController(). We are trying to contain
    * rpcController references so we don't pollute codebase with protobuf references; keep the
    * protobuf references contained and only present in a few classes rather than all about the code
-   * base. n
+   * base.
    */
   protected abstract T rpcCall() throws Exception;
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java
index 2ae13c6ce1c..51821fc7429 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java
@@ -186,7 +186,7 @@ public class Result implements CellScannable, CellScanner {
 
   /**
    * Method for retrieving the row key that corresponds to the row from which this Result was
-   * created. n
+   * created.
    */
   public byte[] getRow() {
     if (this.row == null) {
@@ -227,8 +227,9 @@ public class Result implements CellScannable, CellScanner {
    * or Get) only requested 1 version the list will contain at most 1 entry. If the column did not
    * exist in the result set (either the column does not exist or the column was not selected in the
    * query) the list will be empty. Also see getColumnLatest which returns just a Cell
-   * @param family the family n * @return a list of Cells for this column or empty list if the
-   *               column did not exist in the result set
+   * @param family the family
+   * @return a list of Cells for this column or empty list if the column did not exist in the result
+   *         set
    */
   public List<Cell> getColumnCells(byte[] family, byte[] qualifier) {
     List<Cell> result = new ArrayList<>();
@@ -324,7 +325,7 @@ public class Result implements CellScannable, CellScanner {
   }
 
   /**
-   * The Cell for the most recent timestamp for a given column. nn *
+   * The Cell for the most recent timestamp for a given column.
    * @return the Cell for the column, or null if no value exists in the row or none have been
    *         selected in the query (Get/Scan)
    */
@@ -677,8 +678,7 @@ public class Result implements CellScannable, CellScanner {
   }
 
   /**
-   * n
-   */
+   *   */
   @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
@@ -800,7 +800,8 @@ public class Result implements CellScannable, CellScanner {
   }
 
   /**
-   * Get total size of raw cells n * @return Total size.
+   * Get total size of raw cells
+   * @return Total size.
    */
   public static long getTotalSizeOfCells(Result result) {
     long size = 0;
@@ -816,7 +817,7 @@ public class Result implements CellScannable, CellScanner {
   /**
    * Copy another Result into this one. Needed for the old Mapred framework
    * @throws UnsupportedOperationException if invoked on instance of EMPTY_RESULT (which is supposed
-   *                                       to be immutable). n
+   *                                       to be immutable).
    */
   public void copyFrom(Result other) {
     checkReadonly();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
index 74ff6de6f93..ebb27ceff75 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ResultScanner.java
@@ -86,7 +86,7 @@ public interface ResultScanner extends Closeable, Iterable<Result> {
    * setting (or hbase.client.scanner.caching in hbase-site.xml).
    * @param nbRows number of rows to return
    * @return Between zero and nbRows rowResults. Scan is done if returned array is of zero-length
-   *         (We never return null). n
+   *         (We never return null).
    */
   default Result[] next(int nbRows) throws IOException {
     List<Result> resultSets = new ArrayList<>(nbRows);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptor.java
index cb3b2fd3cd6..719b6b2aae7 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptor.java
@@ -46,20 +46,20 @@ abstract class RetryingCallerInterceptor {
   public abstract RetryingCallerInterceptorContext createEmptyContext();
 
   /**
-   * Call this function in case we caught a failure during retries. n * : The context object that we
-   * obtained previously. n * : The exception that we caught in this particular try n
+   * Call this function in case we caught a failure during retries. : The context object that we
+   * obtained previously. : The exception that we caught in this particular try
    */
   public abstract void handleFailure(RetryingCallerInterceptorContext context, Throwable t)
     throws IOException;
 
   /**
-   * Call this function alongside the actual call done on the callable. nn
+   * Call this function alongside the actual call done on the callable.
    */
   public abstract void intercept(
     RetryingCallerInterceptorContext abstractRetryingCallerInterceptorContext) throws IOException;
 
   /**
-   * Call this function to update at the end of the retry. This is not necessary to happen. n
+   * Call this function to update at the end of the retry. This is not necessary to happen.
    */
   public abstract void updateFailureInfo(RetryingCallerInterceptorContext context);
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptorContext.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptorContext.java
index b810de46c44..177777624d6 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptorContext.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RetryingCallerInterceptorContext.java
@@ -38,17 +38,17 @@ abstract class RetryingCallerInterceptorContext {
 
   /**
    * This prepares the context object by populating it with information specific to the
-   * implementation of the {@link RetryingCallerInterceptor} along with which this will be used. n *
-   * : The {@link RetryingCallable} that contains the information about the call that is being made.
+   * implementation of the {@link RetryingCallerInterceptor} along with which this will be used. :
+   * The {@link RetryingCallable} that contains the information about the call that is being made.
    * @return A new {@link RetryingCallerInterceptorContext} object that can be used for use in the
    *         current retrying call
    */
   public abstract RetryingCallerInterceptorContext prepare(RetryingCallable<?> callable);
 
   /**
-   * Telescopic extension that takes which of the many retries we are currently in. n * : The
-   * {@link RetryingCallable} that contains the information about the call that is being made. n * :
-   * The retry number that we are currently in.
+   * Telescopic extension that takes which of the many retries we are currently in. : The
+   * {@link RetryingCallable} that contains the information about the call that is being made. : The
+   * retry number that we are currently in.
    * @return A new context object that can be used for use in the current retrying call
    */
   public abstract RetryingCallerInterceptorContext prepare(RetryingCallable<?> callable, int tries);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RowMutations.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RowMutations.java
index 1d9b94a54cc..2a3c7530fb7 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RowMutations.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/RowMutations.java
@@ -39,8 +39,8 @@ public class RowMutations implements Row {
 
   /**
    * Create a {@link RowMutations} with the specified mutations.
-   * @param mutations the mutations to send n * @throws IOException if any row in mutations is
-   *                  different to another
+   * @param mutations the mutations to send
+   * @throws IOException if any row in mutations is different to another
    */
   public static RowMutations of(List<? extends Mutation> mutations) throws IOException {
     if (CollectionUtils.isEmpty(mutations)) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java
index 2327142699d..7c964de74e4 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Scan.java
@@ -326,7 +326,7 @@ public class Scan extends Query {
    * Get all columns from the specified family.
    * <p>
    * Overrides previous calls to addColumn for this family.
-   * @param family family name n
+   * @param family family name
    */
   public Scan addFamily(byte[] family) {
     familyMap.remove(family);
@@ -339,7 +339,7 @@ public class Scan extends Query {
    * <p>
    * Overrides previous calls to addFamily for this family.
    * @param family    family name
-   * @param qualifier column qualifier n
+   * @param qualifier column qualifier
    */
   public Scan addColumn(byte[] family, byte[] qualifier) {
     NavigableSet<byte[]> set = familyMap.get(family);
@@ -361,7 +361,7 @@ public class Scan extends Query {
    * @param minStamp minimum timestamp value, inclusive
    * @param maxStamp maximum timestamp value, exclusive
    * @see #setMaxVersions()
-   * @see #setMaxVersions(int) n
+   * @see #setMaxVersions(int)
    */
   public Scan setTimeRange(long minStamp, long maxStamp) throws IOException {
     tr = new TimeRange(minStamp, maxStamp);
@@ -374,8 +374,9 @@ public class Scan extends Query {
    * number of versions beyond the defaut.
    * @param timestamp version timestamp
    * @see #setMaxVersions()
-   * @see #setMaxVersions(int) n * @deprecated As of release 2.0.0, this will be removed in HBase
-   *      3.0.0. Use {@link #setTimestamp(long)} instead
+   * @see #setMaxVersions(int)
+   * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use
+   *             {@link #setTimestamp(long)} instead
    */
   @Deprecated
   public Scan setTimeStamp(long timestamp) throws IOException {
@@ -388,7 +389,7 @@ public class Scan extends Query {
    * number of versions beyond the defaut.
    * @param timestamp version timestamp
    * @see #setMaxVersions()
-   * @see #setMaxVersions(int) n
+   * @see #setMaxVersions(int)
    */
   public Scan setTimestamp(long timestamp) {
     try {
@@ -412,9 +413,9 @@ public class Scan extends Query {
    * <p>
    * If the specified row does not exist, the Scanner will start from the next closest row after the
    * specified row.
-   * @param startRow row to start scanner at or after n * @throws IllegalArgumentException if
-   *                 startRow does not meet criteria for a row key (when length exceeds
-   *                 {@link HConstants#MAX_ROW_LENGTH})
+   * @param startRow row to start scanner at or after
+   * @throws IllegalArgumentException if startRow does not meet criteria for a row key (when length
+   *                                  exceeds {@link HConstants#MAX_ROW_LENGTH})
    * @deprecated since 2.0.0 and will be removed in 3.0.0. Use {@link #withStartRow(byte[])}
    *             instead. This method may change the inclusive of the stop row to keep compatible
    *             with the old behavior.
@@ -436,9 +437,9 @@ public class Scan extends Query {
    * <p>
    * If the specified row does not exist, the Scanner will start from the next closest row after the
    * specified row.
-   * @param startRow row to start scanner at or after n * @throws IllegalArgumentException if
-   *                 startRow does not meet criteria for a row key (when length exceeds
-   *                 {@link HConstants#MAX_ROW_LENGTH})
+   * @param startRow row to start scanner at or after
+   * @throws IllegalArgumentException if startRow does not meet criteria for a row key (when length
+   *                                  exceeds {@link HConstants#MAX_ROW_LENGTH})
    */
   public Scan withStartRow(byte[] startRow) {
     return withStartRow(startRow, true);
@@ -450,9 +451,9 @@ public class Scan extends Query {
    * If the specified row does not exist, or the {@code inclusive} is {@code false}, the Scanner
    * will start from the next closest row after the specified row.
    * @param startRow  row to start scanner at or after
-   * @param inclusive whether we should include the start row when scan n * @throws
-   *                  IllegalArgumentException if startRow does not meet criteria for a row key
-   *                  (when length exceeds {@link HConstants#MAX_ROW_LENGTH})
+   * @param inclusive whether we should include the start row when scan
+   * @throws IllegalArgumentException if startRow does not meet criteria for a row key (when length
+   *                                  exceeds {@link HConstants#MAX_ROW_LENGTH})
    */
   public Scan withStartRow(byte[] startRow, boolean inclusive) {
     if (Bytes.len(startRow) > HConstants.MAX_ROW_LENGTH) {
@@ -472,9 +473,9 @@ public class Scan extends Query {
    * <b>Note:</b> When doing a filter for a rowKey <u>Prefix</u> use
    * {@link #setRowPrefixFilter(byte[])}. The 'trailing 0' will not yield the desired result.
    * </p>
-   * @param stopRow row to end at (exclusive) n * @throws IllegalArgumentException if stopRow does
-   *                not meet criteria for a row key (when length exceeds
-   *                {@link HConstants#MAX_ROW_LENGTH})
+   * @param stopRow row to end at (exclusive)
+   * @throws IllegalArgumentException if stopRow does not meet criteria for a row key (when length
+   *                                  exceeds {@link HConstants#MAX_ROW_LENGTH})
    * @deprecated since 2.0.0 and will be removed in 3.0.0. Use {@link #withStopRow(byte[])} instead.
    *             This method may change the inclusive of the stop row to keep compatible with the
    *             old behavior.
@@ -499,9 +500,9 @@ public class Scan extends Query {
    * <b>Note:</b> When doing a filter for a rowKey <u>Prefix</u> use
    * {@link #setRowPrefixFilter(byte[])}. The 'trailing 0' will not yield the desired result.
    * </p>
-   * @param stopRow row to end at (exclusive) n * @throws IllegalArgumentException if stopRow does
-   *                not meet criteria for a row key (when length exceeds
-   *                {@link HConstants#MAX_ROW_LENGTH})
+   * @param stopRow row to end at (exclusive)
+   * @throws IllegalArgumentException if stopRow does not meet criteria for a row key (when length
+   *                                  exceeds {@link HConstants#MAX_ROW_LENGTH})
    */
   public Scan withStopRow(byte[] stopRow) {
     return withStopRow(stopRow, false);
@@ -513,9 +514,9 @@ public class Scan extends Query {
    * The scan will include rows that are lexicographically less than (or equal to if
    * {@code inclusive} is {@code true}) the provided stopRow.
    * @param stopRow   row to end at
-   * @param inclusive whether we should include the stop row when scan n * @throws
-   *                  IllegalArgumentException if stopRow does not meet criteria for a row key (when
-   *                  length exceeds {@link HConstants#MAX_ROW_LENGTH})
+   * @param inclusive whether we should include the stop row when scan
+   * @throws IllegalArgumentException if stopRow does not meet criteria for a row key (when length
+   *                                  exceeds {@link HConstants#MAX_ROW_LENGTH})
    */
   public Scan withStopRow(byte[] stopRow, boolean inclusive) {
     if (Bytes.len(stopRow) > HConstants.MAX_ROW_LENGTH) {
@@ -543,7 +544,7 @@ public class Scan extends Query {
    * <b>NOTE: Doing a {@link #setStartRow(byte[])} and/or {@link #setStopRow(byte[])} after this
    * method will yield undefined results.</b>
    * </p>
-   * @param rowPrefix the prefix all rows must start with. (Set <i>null</i> to remove the filter.) n
+   * @param rowPrefix the prefix all rows must start with. (Set <i>null</i> to remove the filter.)
    */
   public Scan setRowPrefixFilter(byte[] rowPrefix) {
     if (rowPrefix == null) {
@@ -557,9 +558,9 @@ public class Scan extends Query {
   }
 
   /**
-   * Get all available versions. n * @deprecated since 2.0.0 and will be removed in 3.0.0. It is
-   * easy to misunderstand with column family's max versions, so use {@link #readAllVersions()}
-   * instead.
+   * Get all available versions.
+   * @deprecated since 2.0.0 and will be removed in 3.0.0. It is easy to misunderstand with column
+   *             family's max versions, so use {@link #readAllVersions()} instead.
    * @see #readAllVersions()
    * @see <a href="https://issues.apache.org/jira/browse/HBASE-17125">HBASE-17125</a>
    */
@@ -570,9 +571,9 @@ public class Scan extends Query {
 
   /**
    * Get up to the specified number of versions of each column.
-   * @param maxVersions maximum versions for each column n * @deprecated since 2.0.0 and will be
-   *                    removed in 3.0.0. It is easy to misunderstand with column family's max
-   *                    versions, so use {@link #readVersions(int)} instead.
+   * @param maxVersions maximum versions for each column
+   * @deprecated since 2.0.0 and will be removed in 3.0.0. It is easy to misunderstand with column
+   *             family's max versions, so use {@link #readVersions(int)} instead.
    * @see #readVersions(int)
    * @see <a href="https://issues.apache.org/jira/browse/HBASE-17125">HBASE-17125</a>
    */
@@ -582,7 +583,7 @@ public class Scan extends Query {
   }
 
   /**
-   * Get all available versions. n
+   * Get all available versions.
    */
   public Scan readAllVersions() {
     this.maxVersions = Integer.MAX_VALUE;
@@ -591,7 +592,7 @@ public class Scan extends Query {
 
   /**
    * Get up to the specified number of versions of each column.
-   * @param versions specified number of versions for each column n
+   * @param versions specified number of versions for each column
    */
   public Scan readVersions(int versions) {
     this.maxVersions = versions;
@@ -669,7 +670,7 @@ public class Scan extends Query {
 
   /**
    * Setting the familyMap
-   * @param familyMap map of family to qualifier n
+   * @param familyMap map of family to qualifier
    */
   public Scan setFamilyMap(Map<byte[], NavigableSet<byte[]>> familyMap) {
     this.familyMap = familyMap;
@@ -677,7 +678,7 @@ public class Scan extends Query {
   }
 
   /**
-   * Getting the familyMap n
+   * Getting the familyMap
    */
   public Map<byte[], NavigableSet<byte[]>> getFamilyMap() {
     return this.familyMap;
@@ -752,16 +753,12 @@ public class Scan extends Query {
     return this.caching;
   }
 
-  /**
-   * n
-   */
+  /** Returns TimeRange */
   public TimeRange getTimeRange() {
     return this.tr;
   }
 
-  /**
-   * n
-   */
+  /** Returns RowFilter */
   @Override
   public Filter getFilter() {
     return filter;
@@ -796,7 +793,7 @@ public class Scan extends Query {
    * Set whether this scan is a reversed one
    * <p>
    * This is false by default which means forward(normal) scan.
-   * @param reversed if true, scan will be backward order n
+   * @param reversed if true, scan will be backward order
    */
   public Scan setReversed(boolean reversed) {
     this.reversed = reversed;
@@ -815,7 +812,8 @@ public class Scan extends Query {
    * Setting whether the caller wants to see the partial results when server returns
    * less-than-expected cells. It is helpful while scanning a huge row to prevent OOM at client. By
    * default this value is false and the complete results will be assembled client side before being
-   * delivered to the caller. nn * @see Result#mayHaveMoreCellsInRow()
+   * delivered to the caller.
+   * @see Result#mayHaveMoreCellsInRow()
    * @see #setBatch(int)
    */
   public Scan setAllowPartialResults(final boolean allowPartialResults) {
@@ -839,7 +837,7 @@ public class Scan extends Query {
 
   /**
    * Compile the table and column family (i.e. schema) information into a String. Useful for parsing
-   * and aggregation by debugging, logging, and administration tools. n
+   * and aggregation by debugging, logging, and administration tools.
    */
   @Override
   public Map<String, Object> getFingerprint() {
@@ -861,7 +859,7 @@ public class Scan extends Query {
    * Compile the details beyond the scope of getFingerprint (row, columns, timestamps, etc.) into a
    * Map along with the fingerprinted information. Useful for debugging, logging, and administration
    * tools.
-   * @param maxCols a limit on the number of columns output prior to truncation n
+   * @param maxCols a limit on the number of columns output prior to truncation
    */
   @Override
   public Map<String, Object> toMap(int maxCols) {
@@ -942,11 +940,12 @@ public class Scan extends Query {
    * non-compaction read request https://issues.apache.org/jira/browse/HBASE-7266 On the other hand,
    * if setting it true, we would do openScanner,next,closeScanner in one RPC call. It means the
    * better performance for small scan. [HBASE-9488]. Generally, if the scan range is within one
-   * data block(64KB), it could be considered as a small scan. n * @deprecated since 2.0.0 and will
-   * be removed in 3.0.0. Use {@link #setLimit(int)} and {@link #setReadType(ReadType)} instead. And
-   * for the one rpc optimization, now we will also fetch data when openScanner, and if the number
-   * of rows reaches the limit then we will close the scanner automatically which means we will fall
-   * back to one rpc.
+   * data block(64KB), it could be considered as a small scan.
+   * @deprecated since 2.0.0 and will be removed in 3.0.0. Use {@link #setLimit(int)} and
+   *             {@link #setReadType(ReadType)} instead. And for the one rpc optimization, now we
+   *             will also fetch data when openScanner, and if the number of rows reaches the limit
+   *             then we will close the scanner automatically which means we will fall back to one
+   *             rpc.
    * @see #setLimit(int)
    * @see #setReadType(ReadType)
    * @see <a href="https://issues.apache.org/jira/browse/HBASE-17045">HBASE-17045</a>
@@ -1065,7 +1064,7 @@ public class Scan extends Query {
    * reaches this value.
    * <p>
    * This condition will be tested at last, after all other conditions such as stopRow, filter, etc.
-   * @param limit the limit of rows for this scan n
+   * @param limit the limit of rows for this scan
    */
   public Scan setLimit(int limit) {
     this.limit = limit;
@@ -1074,7 +1073,7 @@ public class Scan extends Query {
 
   /**
    * Call this when you only want to get one row. It will set {@code limit} to {@code 1}, and also
-   * set {@code readType} to {@link ReadType#PREAD}. n
+   * set {@code readType} to {@link ReadType#PREAD}.
    */
   public Scan setOneRowLimit() {
     return setLimit(1).setReadType(ReadType.PREAD);
@@ -1096,7 +1095,7 @@ public class Scan extends Query {
    * Set the read type for this scan.
    * <p>
    * Notice that we may choose to use pread even if you specific {@link ReadType#STREAM} here. For
-   * example, we will always use pread if this is a get scan. n
+   * example, we will always use pread if this is a get scan.
    */
   public Scan setReadType(ReadType readType) {
     this.readType = readType;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/SecureBulkLoadClient.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/SecureBulkLoadClient.java
index aeca91e5bc9..825a58e7bdd 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/SecureBulkLoadClient.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/SecureBulkLoadClient.java
@@ -99,8 +99,8 @@ public class SecureBulkLoadClient {
   }
 
   /**
-   * Securely bulk load a list of HFiles using client protocol. nnnnnn * @return true if all are
-   * loaded n
+   * Securely bulk load a list of HFiles using client protocol.
+   * @return true if all are loaded
    */
   public boolean secureBulkLoadHFiles(final ClientService.BlockingInterface client,
     final List<Pair<byte[], String>> familyPaths, final byte[] regionName, boolean assignSeqNum,
@@ -110,8 +110,8 @@ public class SecureBulkLoadClient {
   }
 
   /**
-   * Securely bulk load a list of HFiles using client protocol. nnnnnnn * @return true if all are
-   * loaded n
+   * Securely bulk load a list of HFiles using client protocol.
+   * @return true if all are loaded
    */
   public boolean secureBulkLoadHFiles(final ClientService.BlockingInterface client,
     final List<Pair<byte[], String>> familyPaths, final byte[] regionName, boolean assignSeqNum,
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Table.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Table.java
index 894b4678908..11482a96a0f 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Table.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/Table.java
@@ -147,7 +147,8 @@ public interface Table extends Closeable {
    * @param results Empty Object[], same size as actions. Provides access to partial results, in
    *                case an exception is thrown. A null in the result array means that the call for
    *                that action failed, even after retries. The order of the objects in the results
-   *                array corresponds to the order of actions in the request list. n * @since 0.90.0
+   *                array corresponds to the order of actions in the request list.
+   * @since 0.90.0
    */
   default void batch(final List<? extends Row> actions, final Object[] results)
     throws IOException, InterruptedException {
@@ -358,8 +359,8 @@ public interface Table extends Closeable {
    * @apiNote In 3.0.0 version, the input list {@code deletes} will no longer be modified. Also,
    *          {@link #put(List)} runs pre-flight validations on the input list on client. Currently
    *          {@link #delete(List)} doesn't run validations on the client, there is no need
-   *          currently, but this may change in the future. An * {@link IllegalArgumentException}
-   *          will be thrown in this case.
+   *          currently, but this may change in the future. An {@link IllegalArgumentException} will
+   *          be thrown in this case.
    */
   default void delete(List<Delete> deletes) throws IOException {
     throw new NotImplementedException("Add an implementation!");
@@ -770,12 +771,12 @@ public interface Table extends Closeable {
    * Creates an instance of the given {@link com.google.protobuf.Service} subclass for each table
    * region spanning the range from the {@code startKey} row to {@code endKey} row (inclusive), all
    * the invocations to the same region server will be batched into one call. The coprocessor
-   * service is invoked according to the service instance, method name and parameters. n * the
-   * descriptor for the protobuf service method to call. n * the method call parameters n * start
-   * region selection with region containing this row. If {@code null}, the selection will start
-   * with the first table region. n * select regions up to and including the region containing this
-   * row. If {@code null}, selection will continue through the last table region. n * the proto type
-   * of the response of the method in Service.
+   * service is invoked according to the service instance, method name and parameters. the
+   * descriptor for the protobuf service method to call. the method call parameters start region
+   * selection with region containing this row. If {@code null}, the selection will start with the
+   * first table region. select regions up to and including the region containing this row. If
+   * {@code null}, selection will continue through the last table region. the proto type of the
+   * response of the method in Service.
    * @param <R> the response type for the coprocessor Service method
    * @return a map of result values keyed by region name
    */
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptor.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptor.java
index ff97f419bac..088c52d8f51 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptor.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptor.java
@@ -166,7 +166,7 @@ public interface TableDescriptor {
   String getRegionSplitPolicyClassName();
 
   /**
-   * Get the name of the table n
+   * Get the name of the table
    */
   TableName getTableName();
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java
index fa1b1b65224..473631b1b93 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableDescriptorBuilder.java
@@ -895,7 +895,7 @@ public class TableDescriptorBuilder {
     }
 
     /**
-     * Get the name of the table n
+     * Get the name of the table
      */
     @Override
     public TableName getTableName() {
@@ -1297,7 +1297,8 @@ public class TableDescriptorBuilder {
      * org.apache.hadoop.hbase.coprocessor.RegionObserver or Endpoint. It won't check if the class
      * can be loaded or not. Whether a coprocessor is loadable or not will be determined when a
      * region is opened.
-     * @param className Full class name. n * @return the modifyable TD
+     * @param className Full class name.
+     * @return the modifyable TD
      */
     public ModifyableTableDescriptor setCoprocessor(String className) throws IOException {
       return setCoprocessor(CoprocessorDescriptorBuilder.newBuilder(className)
@@ -1345,8 +1346,8 @@ public class TableDescriptorBuilder {
      * org.apache.hadoop.hbase.coprocessor.RegionObserver or Endpoint. It won't check if the class
      * can be loaded or not. Whether a coprocessor is loadable or not will be determined when a
      * region is opened.
-     * @param specStr The Coprocessor specification all in in one String n * @return the modifyable
-     *                TD
+     * @param specStr The Coprocessor specification all in in one String
+     * @return the modifyable TD
      * @deprecated used by HTableDescriptor and admin.rb. As of release 2.0.0, this will be removed
      *             in HBase 3.0.0.
      */
@@ -1488,8 +1489,8 @@ public class TableDescriptorBuilder {
 
     /**
      * @param bytes A pb serialized {@link ModifyableTableDescriptor} instance with pb magic prefix
-     * @return An instance of {@link ModifyableTableDescriptor} made from <code>bytes</code> n
-     *         * @see #toByteArray()
+     * @return An instance of {@link ModifyableTableDescriptor} made from <code>bytes</code>
+     * @see #toByteArray()
      */
     private static TableDescriptor parseFrom(final byte[] bytes) throws DeserializationException {
       if (!ProtobufUtil.isPBMagicPrefix(bytes)) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableState.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableState.java
index 6ecd97a75c9..6bf4ffd51c5 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableState.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/TableState.java
@@ -42,7 +42,7 @@ public class TableState {
 
     /**
      * Covert from PB version of State
-     * @param state convert from n
+     * @param state convert from
      */
     public static State convert(HBaseProtos.TableState.State state) {
       State ret;
@@ -66,7 +66,7 @@ public class TableState {
     }
 
     /**
-     * Covert to PB version of State n
+     * Covert to PB version of State
      */
     public HBaseProtos.TableState.State convert() {
       HBaseProtos.TableState.State state;
@@ -140,7 +140,7 @@ public class TableState {
   }
 
   /**
-   * Table name for state n
+   * Table name for state
    */
   public TableName getTableName() {
     return tableName;
@@ -168,7 +168,7 @@ public class TableState {
   }
 
   /**
-   * Covert to PB version of TableState n
+   * Covert to PB version of TableState
    */
   public HBaseProtos.TableState convert() {
     return HBaseProtos.TableState.newBuilder().setState(this.state.convert()).build();
@@ -177,7 +177,7 @@ public class TableState {
   /**
    * Covert from PB version of TableState
    * @param tableName  table this state of
-   * @param tableState convert from n
+   * @param tableState convert from
    */
   public static TableState convert(TableName tableName, HBaseProtos.TableState tableState) {
     TableState.State state = State.convert(tableState.getState());
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/UnmodifyableHRegionInfo.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/UnmodifyableHRegionInfo.java
index a2a53114ac7..cab7eff1516 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/UnmodifyableHRegionInfo.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/UnmodifyableHRegionInfo.java
@@ -27,7 +27,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 @Deprecated
 class UnmodifyableHRegionInfo extends HRegionInfo {
   /*
-   * Creates an unmodifyable copy of an HRegionInfo n
+   * Creates an unmodifyable copy of an HRegionInfo
    */
   UnmodifyableHRegionInfo(HRegionInfo info) {
     super(info);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/backoff/ServerStatistics.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/backoff/ServerStatistics.java
index ab5915ec975..76a0d6addf3 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/backoff/ServerStatistics.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/backoff/ServerStatistics.java
@@ -33,7 +33,7 @@ public class ServerStatistics {
 
   /**
    * Good enough attempt. Last writer wins. It doesn't really matter which one gets to update, as
-   * something gets set nn
+   * something gets set
    */
   public void update(byte[] region, RegionLoadStats currentStats) {
     RegionStatistics regionStat = this.stats.get(region);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/metrics/ServerSideScanMetrics.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/metrics/ServerSideScanMetrics.java
index 519109934eb..8d75af05cfc 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/metrics/ServerSideScanMetrics.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/metrics/ServerSideScanMetrics.java
@@ -35,8 +35,8 @@ public class ServerSideScanMetrics {
   private final Map<String, AtomicLong> counters = new HashMap<>();
 
   /**
-   * Create a new counter with the specified name n * @return {@link AtomicLong} instance for the
-   * counter with counterName
+   * Create a new counter with the specified name
+   * @return {@link AtomicLong} instance for the counter with counterName
    */
   protected AtomicLong createCounter(String counterName) {
     AtomicLong c = new AtomicLong(0);
@@ -75,9 +75,6 @@ public class ServerSideScanMetrics {
    */
   public final AtomicLong countOfRowsScanned = createCounter(COUNT_OF_ROWS_SCANNED_KEY_METRIC_NAME);
 
-  /**
-   * nn
-   */
   public void setCounter(String counterName, long value) {
     AtomicLong c = this.counters.get(counterName);
     if (c != null) {
@@ -85,23 +82,16 @@ public class ServerSideScanMetrics {
     }
   }
 
-  /**
-   * n * @return true if a counter exists with the counterName
-   */
+  /** Returns true if a counter exists with the counterName */
   public boolean hasCounter(String counterName) {
     return this.counters.containsKey(counterName);
   }
 
-  /**
-   * n * @return {@link AtomicLong} instance for this counter name, null if counter does not exist.
-   */
+  /** Returns {@link AtomicLong} instance for this counter name, null if counter does not exist. */
   public AtomicLong getCounter(String counterName) {
     return this.counters.get(counterName);
   }
 
-  /**
-   * nn
-   */
   public void addToCounter(String counterName, long delta) {
     AtomicLong c = this.counters.get(counterName);
     if (c != null) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java
index 4f94dc67a88..d2816552d34 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java
@@ -178,7 +178,8 @@ public class ReplicationAdmin implements Closeable {
 
   /**
    * Get the number of slave clusters the local cluster has.
-   * @return number of slave clusters n * @deprecated
+   * @return number of slave clusters
+   * @deprecated
    */
   @Deprecated
   public int getPeersCount() throws IOException {
@@ -222,8 +223,9 @@ public class ReplicationAdmin implements Closeable {
   /**
    * Append the replicable table-cf config of the specified peer
    * @param id       a short that identifies the cluster
-   * @param tableCfs table-cfs config str nn * @deprecated as release of 2.0.0, and it will be
-   *                 removed in 3.0.0, use {@link #appendPeerTableCFs(String, Map)} instead.
+   * @param tableCfs table-cfs config str
+   * @deprecated as release of 2.0.0, and it will be removed in 3.0.0, use
+   *             {@link #appendPeerTableCFs(String, Map)} instead.
    */
   @Deprecated
   public void appendPeerTableCFs(String id, String tableCfs)
@@ -234,7 +236,7 @@ public class ReplicationAdmin implements Closeable {
   /**
    * Append the replicable table-cf config of the specified peer
    * @param id       a short that identifies the cluster
-   * @param tableCfs A map from tableName to column family names nn
+   * @param tableCfs A map from tableName to column family names
    */
   @Deprecated
   public void appendPeerTableCFs(String id, Map<TableName, ? extends Collection<String>> tableCfs)
@@ -245,8 +247,9 @@ public class ReplicationAdmin implements Closeable {
   /**
    * Remove some table-cfs from table-cfs config of the specified peer
    * @param id      a short name that identifies the cluster
-   * @param tableCf table-cfs config str nn * @deprecated as release of 2.0.0, and it will be
-   *                removed in 3.0.0, use {@link #removePeerTableCFs(String, Map)} instead.
+   * @param tableCf table-cfs config str
+   * @deprecated as release of 2.0.0, and it will be removed in 3.0.0, use
+   *             {@link #removePeerTableCFs(String, Map)} instead.
    */
   @Deprecated
   public void removePeerTableCFs(String id, String tableCf)
@@ -257,7 +260,7 @@ public class ReplicationAdmin implements Closeable {
   /**
    * Remove some table-cfs from config of the specified peer
    * @param id       a short name that identifies the cluster
-   * @param tableCfs A map from tableName to column family names nn
+   * @param tableCfs A map from tableName to column family names
    */
   @Deprecated
   public void removePeerTableCFs(String id, Map<TableName, ? extends Collection<String>> tableCfs)
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
index 5ed2aba2a19..232540a35aa 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/ColumnInterpreter.java
@@ -50,36 +50,27 @@ import org.apache.yetus.audience.InterfaceStability;
 public abstract class ColumnInterpreter<T, S, P extends Message, Q extends Message,
   R extends Message> {
 
-  /**
-   * nnn * @return value of type T n
-   */
+  /** Returns value of type T */
   public abstract T getValue(byte[] colFamily, byte[] colQualifier, Cell c) throws IOException;
 
-  /**
-   * nn * @return sum or non null value among (if either of them is null); otherwise returns a null.
-   */
+  /** Returns sum or non null value among (if either of them is null); otherwise returns a null. */
   public abstract S add(S l1, S l2);
 
   /**
-   * returns the maximum value for this type T n
+   * returns the maximum value for this type T
    */
-
   public abstract T getMaxValue();
 
   public abstract T getMinValue();
 
-  /**
-   * nnn
-   */
+  /** Returns multiplication */
   public abstract S multiply(S o1, S o2);
 
-  /**
-   * nn
-   */
+  /** Returns increment */
   public abstract S increment(S o);
 
   /**
-   * provides casting opportunity between the data types. nn
+   * provides casting opportunity between the data types.
    */
   public abstract S castToReturnType(T o);
 
@@ -94,7 +85,7 @@ public abstract class ColumnInterpreter<T, S, P extends Message, Q extends Messa
 
   /**
    * used for computing average of &lt;S&gt; data values. Not providing the divide method that takes
-   * two &lt;S&gt; values as it is not needed as of now. nnn
+   * two &lt;S&gt; values as it is not needed as of now.
    */
   public abstract double divideForAvg(S o, Long l);
 
@@ -110,37 +101,37 @@ public abstract class ColumnInterpreter<T, S, P extends Message, Q extends Messa
 
   /**
    * This method should initialize any field(s) of the ColumnInterpreter with a parsing of the
-   * passed message bytes (used on the server side). n
+   * passed message bytes (used on the server side).
    */
   public abstract void initialize(P msg);
 
   /**
-   * This method gets the PB message corresponding to the cell type n * @return the PB message for
-   * the cell-type instance
+   * This method gets the PB message corresponding to the cell type
+   * @return the PB message for the cell-type instance
    */
   public abstract Q getProtoForCellType(T t);
 
   /**
-   * This method gets the PB message corresponding to the cell type n * @return the cell-type
-   * instance from the PB message
+   * This method gets the PB message corresponding to the cell type
+   * @return the cell-type instance from the PB message
    */
   public abstract T getCellValueFromProto(Q q);
 
   /**
-   * This method gets the PB message corresponding to the promoted type n * @return the PB message
-   * for the promoted-type instance
+   * This method gets the PB message corresponding to the promoted type
+   * @return the PB message for the promoted-type instance
    */
   public abstract R getProtoForPromotedType(S s);
 
   /**
-   * This method gets the promoted type from the proto message n * @return the promoted-type
-   * instance from the PB message
+   * This method gets the promoted type from the proto message
+   * @return the promoted-type instance from the PB message
    */
   public abstract S getPromotedValueFromProto(R r);
 
   /**
    * The response message comes as type S. This will convert/cast it to T. In some sense, performs
-   * the opposite of {@link #castToReturnType(Object)} nn
+   * the opposite of {@link #castToReturnType(Object)}
    */
   public abstract T castToCellType(S response);
 }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
index ff9ed066fd4..de8e90ca9ec 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorException.java
@@ -33,7 +33,7 @@ public class CoprocessorException extends DoNotRetryIOException {
   }
 
   /**
-   * Constructor with a Class object and exception message. nn
+   * Constructor with a Class object and exception message.
    */
   public CoprocessorException(Class<?> clazz, String s) {
     super("Coprocessor [" + clazz.getName() + "]: " + s);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ClientExceptionsUtil.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ClientExceptionsUtil.java
index 33b5d9cb57f..22b3ae4a3bf 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ClientExceptionsUtil.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/ClientExceptionsUtil.java
@@ -170,7 +170,7 @@ public final class ClientExceptionsUtil {
   /**
    * Translates exception for preemptive fast fail checks.
    * @param t exception to check
-   * @return translated exception n
+   * @return translated exception
    */
   public static Throwable translatePFFE(Throwable t) throws IOException {
     if (t instanceof NoSuchMethodError) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FailedSanityCheckException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FailedSanityCheckException.java
index ae15777a7f0..00774e37094 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FailedSanityCheckException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/exceptions/FailedSanityCheckException.java
@@ -35,15 +35,13 @@ public class FailedSanityCheckException extends org.apache.hadoop.hbase.DoNotRet
   }
 
   /**
-   * n
-   */
+   *   */
   public FailedSanityCheckException(String message) {
     super(message);
   }
 
   /**
-   * nn
-   */
+   *   */
   public FailedSanityCheckException(String message, Throwable cause) {
     super(message, cause);
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryComparator.java
index 7aff979f4c2..ff06e0648fd 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryComparator.java
@@ -65,8 +65,8 @@ public class BinaryComparator extends org.apache.hadoop.hbase.filter.ByteArrayCo
 
   /**
    * @param pbBytes A pb serialized {@link BinaryComparator} instance
-   * @return An instance of {@link BinaryComparator} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link BinaryComparator} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static BinaryComparator parseFrom(final byte[] pbBytes) throws DeserializationException {
     ComparatorProtos.BinaryComparator proto;
@@ -79,8 +79,8 @@ public class BinaryComparator extends org.apache.hadoop.hbase.filter.ByteArrayCo
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryPrefixComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryPrefixComparator.java
index fcf447dcb0c..237833934d3 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryPrefixComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BinaryPrefixComparator.java
@@ -69,8 +69,8 @@ public class BinaryPrefixComparator extends ByteArrayComparable {
 
   /**
    * @param pbBytes A pb serialized {@link BinaryPrefixComparator} instance
-   * @return An instance of {@link BinaryPrefixComparator} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link BinaryPrefixComparator} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static BinaryPrefixComparator parseFrom(final byte[] pbBytes)
     throws DeserializationException {
@@ -84,8 +84,8 @@ public class BinaryPrefixComparator extends ByteArrayComparable {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BitComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BitComparator.java
index 8abdcf4e8a6..e462f81d945 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BitComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/BitComparator.java
@@ -75,7 +75,8 @@ public class BitComparator extends ByteArrayComparable {
 
   /**
    * @param pbBytes A pb serialized {@link BitComparator} instance
-   * @return An instance of {@link BitComparator} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link BitComparator} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static BitComparator parseFrom(final byte[] pbBytes) throws DeserializationException {
     ComparatorProtos.BitComparator proto;
@@ -89,8 +90,8 @@ public class BitComparator extends ByteArrayComparable {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnPaginationFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnPaginationFilter.java
index e9cf7dce76d..7033428283a 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnPaginationFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnPaginationFilter.java
@@ -79,22 +79,19 @@ public class ColumnPaginationFilter extends FilterBase {
   }
 
   /**
-   * n
-   */
+   *   */
   public int getLimit() {
     return limit;
   }
 
   /**
-   * n
-   */
+   *   */
   public int getOffset() {
     return offset;
   }
 
   /**
-   * n
-   */
+   *   */
   public byte[] getColumnOffset() {
     return columnOffset;
   }
@@ -174,8 +171,8 @@ public class ColumnPaginationFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link ColumnPaginationFilter} instance
-   * @return An instance of {@link ColumnPaginationFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link ColumnPaginationFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static ColumnPaginationFilter parseFrom(final byte[] pbBytes)
     throws DeserializationException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnRangeFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnRangeFilter.java
index 1abd49fff3c..fb5311ed7b8 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnRangeFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnRangeFilter.java
@@ -164,8 +164,8 @@ public class ColumnRangeFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link ColumnRangeFilter} instance
-   * @return An instance of {@link ColumnRangeFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link ColumnRangeFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static ColumnRangeFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.ColumnRangeFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnValueFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnValueFilter.java
index 0b3b85dbb47..3749e845457 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnValueFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnValueFilter.java
@@ -68,9 +68,7 @@ public class ColumnValueFilter extends FilterBase {
     this.comparator = Preconditions.checkNotNull(comparator, "Comparator should not be null");
   }
 
-  /**
-   * n
-   */
+  /** Returns operator */
   public CompareOperator getCompareOperator() {
     return op;
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/CompareFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/CompareFilter.java
index 5b25e3b2ae1..443ee77a6bf 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/CompareFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/CompareFilter.java
@@ -101,8 +101,7 @@ public abstract class CompareFilter extends FilterBase {
   }
 
   /**
-   * n * @deprecated since 2.0.0. Will be removed in 3.0.0. Use {@link #getCompareOperator()}
-   * instead.
+   * @deprecated since 2.0.0. Will be removed in 3.0.0. Use {@link #getCompareOperator()} instead.
    */
   @Deprecated
   public CompareOp getOperator() {
@@ -287,8 +286,8 @@ public abstract class CompareFilter extends FilterBase {
   }
 
   /**
-   * n * @return true if and only if the fields of the filter that are serialized are equal to the
-   * corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the filter that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(Filter o) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/DependentColumnFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/DependentColumnFilter.java
index 0a39f4c94f2..d4d12095443 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/DependentColumnFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/DependentColumnFilter.java
@@ -231,8 +231,8 @@ public class DependentColumnFilter extends CompareFilter {
 
   /**
    * @param pbBytes A pb serialized {@link DependentColumnFilter} instance
-   * @return An instance of {@link DependentColumnFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link DependentColumnFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static DependentColumnFilter parseFrom(final byte[] pbBytes)
     throws DeserializationException {
@@ -259,8 +259,8 @@ public class DependentColumnFilter extends CompareFilter {
   }
 
   /**
-   * n * @return true if and only if the fields of the filter that are serialized are equal to the
-   * corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the filter that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @edu.umd.cs.findbugs.annotations.SuppressWarnings(
       value = "RCN_REDUNDANT_NULLCHECK_OF_NONNULL_VALUE")
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FamilyFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FamilyFilter.java
index 917ac522de1..961b3868257 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FamilyFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FamilyFilter.java
@@ -102,7 +102,8 @@ public class FamilyFilter extends CompareFilter {
 
   /**
    * @param pbBytes A pb serialized {@link FamilyFilter} instance
-   * @return An instance of {@link FamilyFilter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link FamilyFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static FamilyFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.FamilyFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/Filter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/Filter.java
index 9df8a6f14f3..4b78e69efae 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/Filter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/Filter.java
@@ -241,7 +241,8 @@ public abstract class Filter {
    * Concrete implementers can signal a failure condition in their code by throwing an
    * {@link IOException}.
    * @param pbBytes A pb serialized {@link Filter} instance
-   * @return An instance of {@link Filter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link Filter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static Filter parseFrom(final byte[] pbBytes) throws DeserializationException {
     throw new DeserializationException(
@@ -250,9 +251,9 @@ public abstract class Filter {
 
   /**
    * Concrete implementers can signal a failure condition in their code by throwing an
-   * {@link IOException}. n * @return true if and only if the fields of the filter that are
-   * serialized are equal to the corresponding fields in other. Used for testing.
-   * @throws IOException in case an I/O or an filter specific failure needs to be signaled.
+   * {@link IOException}.
+   * @return true if and only if the fields of the filter that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   abstract boolean areSerializedFieldsEqual(Filter other);
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterBase.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterBase.java
index e66022f6e7d..988725edad5 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterBase.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterBase.java
@@ -148,9 +148,9 @@ public abstract class FilterBase extends Filter {
   }
 
   /**
-   * Default implementation so that writers of custom filters aren't forced to implement. n
-   * * @return true if and only if the fields of the filter that are serialized are equal to the
-   * corresponding fields in other. Used for testing.
+   * Default implementation so that writers of custom filters aren't forced to implement.
+   * @return true if and only if the fields of the filter that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(Filter other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterList.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterList.java
index 35313837843..1747ceb95a2 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterList.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterList.java
@@ -84,7 +84,7 @@ final public class FilterList extends FilterBase {
 
   /**
    * Constructor that takes a var arg number of {@link Filter}s. The default operator MUST_PASS_ALL
-   * is assumed. n
+   * is assumed.
    */
   public FilterList(final Filter... filters) {
     this(Operator.MUST_PASS_ALL, Arrays.asList(filters));
@@ -108,14 +108,14 @@ final public class FilterList extends FilterBase {
   }
 
   /**
-   * Get the operator. n
+   * Get the operator.
    */
   public Operator getOperator() {
     return operator;
   }
 
   /**
-   * Get the filters. n
+   * Get the filters.
    */
   public List<Filter> getFilters() {
     return filterListBase.getFilters();
@@ -206,7 +206,8 @@ final public class FilterList extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link FilterList} instance
-   * @return An instance of {@link FilterList} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link FilterList} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static FilterList parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.FilterList proto;
@@ -229,8 +230,8 @@ final public class FilterList extends FilterBase {
   }
 
   /**
-   * n * @return true if and only if the fields of the filter that are serialized are equal to the
-   * corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the filter that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(Filter other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterListBase.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterListBase.java
index 2d36172064d..1bff5681746 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterListBase.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FilterListBase.java
@@ -92,7 +92,7 @@ public abstract class FilterListBase extends FilterBase {
    * the current child, we should set the traverse result (transformed cell) of previous node(s) as
    * the initial value. (HBASE-18879).
    * @param c The cell in question.
-   * @return the transformed cell. n
+   * @return the transformed cell.
    */
   @Override
   public Cell transformCell(Cell c) throws IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FirstKeyValueMatchingQualifiersFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FirstKeyValueMatchingQualifiersFilter.java
index b49e51f348c..5511c3e3bb8 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FirstKeyValueMatchingQualifiersFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FirstKeyValueMatchingQualifiersFilter.java
@@ -97,7 +97,8 @@ public class FirstKeyValueMatchingQualifiersFilter extends FirstKeyOnlyFilter {
   /**
    * @param pbBytes A pb serialized {@link FirstKeyValueMatchingQualifiersFilter} instance
    * @return An instance of {@link FirstKeyValueMatchingQualifiersFilter} made from
-   *         <code>bytes</code> n * @see #toByteArray
+   *         <code>bytes</code>
+   * @see #toByteArray
    */
   public static FirstKeyValueMatchingQualifiersFilter parseFrom(final byte[] pbBytes)
     throws DeserializationException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java
index 6036aebdd57..c7c48419c00 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java
@@ -138,7 +138,8 @@ public class FuzzyRowFilter extends FilterBase {
 
   /**
    * We need to preprocess mask array, as since we treat 2's as unfixed positions and -1 (0xff) as
-   * fixed positions n * @return mask array
+   * fixed positions
+   * @return mask array
    */
   private byte[] preprocessMask(byte[] mask) {
     if (!UNSAFE_UNALIGNED) {
@@ -300,8 +301,8 @@ public class FuzzyRowFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link FuzzyRowFilter} instance
-   * @return An instance of {@link FuzzyRowFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link FuzzyRowFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static FuzzyRowFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.FuzzyRowFilter proto;
@@ -628,8 +629,8 @@ public class FuzzyRowFilter extends FilterBase {
 
   /**
    * For forward scanner, next cell hint should not contain any trailing zeroes unless they are part
-   * of fuzzyKeyMeta hint = '\x01\x01\x01\x00\x00' will skip valid row '\x01\x01\x01' nn * @param
-   * toInc - position of incremented byte
+   * of fuzzyKeyMeta hint = '\x01\x01\x01\x00\x00' will skip valid row '\x01\x01\x01'
+   * @param toInc - position of incremented byte
    * @return trimmed version of result
    */
 
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/InclusiveStopFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/InclusiveStopFilter.java
index 67a214e5650..f28bfee8f46 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/InclusiveStopFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/InclusiveStopFilter.java
@@ -93,8 +93,8 @@ public class InclusiveStopFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link InclusiveStopFilter} instance
-   * @return An instance of {@link InclusiveStopFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link InclusiveStopFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static InclusiveStopFilter parseFrom(final byte[] pbBytes)
     throws DeserializationException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/KeyOnlyFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/KeyOnlyFilter.java
index 60b3a5c0480..bd4271e457c 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/KeyOnlyFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/KeyOnlyFilter.java
@@ -109,7 +109,8 @@ public class KeyOnlyFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link KeyOnlyFilter} instance
-   * @return An instance of {@link KeyOnlyFilter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link KeyOnlyFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static KeyOnlyFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.KeyOnlyFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/LongComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/LongComparator.java
index 8f9a7f1dfc3..c7eb67612a7 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/LongComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/LongComparator.java
@@ -78,8 +78,8 @@ public class LongComparator extends ByteArrayComparable {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   boolean areSerializedFieldsEqual(LongComparator other) {
     if (other == this) return true;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.java
index e7c868e3bbb..e3be6e6c2e7 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.java
@@ -135,8 +135,8 @@ public class MultipleColumnPrefixFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link MultipleColumnPrefixFilter} instance
-   * @return An instance of {@link MultipleColumnPrefixFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link MultipleColumnPrefixFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static MultipleColumnPrefixFilter parseFrom(final byte[] pbBytes)
     throws DeserializationException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/NullComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/NullComparator.java
index 6153e1e8080..64fbb4fc928 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/NullComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/NullComparator.java
@@ -72,8 +72,8 @@ public class NullComparator extends ByteArrayComparable {
 
   /**
    * @param pbBytes A pb serialized {@link NullComparator} instance
-   * @return An instance of {@link NullComparator} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link NullComparator} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static NullComparator parseFrom(final byte[] pbBytes) throws DeserializationException {
     try {
@@ -86,8 +86,8 @@ public class NullComparator extends ByteArrayComparable {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/PageFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/PageFilter.java
index 45c8a1f1a3f..aec2c84ba37 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/PageFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/PageFilter.java
@@ -107,7 +107,8 @@ public class PageFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link PageFilter} instance
-   * @return An instance of {@link PageFilter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link PageFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static PageFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.PageFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RandomRowFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RandomRowFilter.java
index 656ceaf3e1a..ece069d0c89 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RandomRowFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RandomRowFilter.java
@@ -38,7 +38,7 @@ public class RandomRowFilter extends FilterBase {
   protected boolean filterOutRow;
 
   /**
-   * Create a new filter with a specified chance for a row to be included. n
+   * Create a new filter with a specified chance for a row to be included.
    */
   public RandomRowFilter(float chance) {
     this.chance = chance;
@@ -50,7 +50,7 @@ public class RandomRowFilter extends FilterBase {
   }
 
   /**
-   * Set the chance that a row is included. n
+   * Set the chance that a row is included.
    */
   public void setChance(float chance) {
     this.chance = chance;
@@ -115,8 +115,8 @@ public class RandomRowFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link RandomRowFilter} instance
-   * @return An instance of {@link RandomRowFilter} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link RandomRowFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static RandomRowFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.RandomRowFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RegexStringComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RegexStringComparator.java
index 4bdc057bd9e..2db7f7e7561 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RegexStringComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RegexStringComparator.java
@@ -153,8 +153,8 @@ public class RegexStringComparator extends ByteArrayComparable {
 
   /**
    * @param pbBytes A pb serialized {@link RegexStringComparator} instance
-   * @return An instance of {@link RegexStringComparator} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link RegexStringComparator} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static RegexStringComparator parseFrom(final byte[] pbBytes)
     throws DeserializationException {
@@ -183,8 +183,8 @@ public class RegexStringComparator extends ByteArrayComparable {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RowFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RowFilter.java
index fdefe382439..2978b8e3236 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RowFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/RowFilter.java
@@ -116,7 +116,8 @@ public class RowFilter extends CompareFilter {
 
   /**
    * @param pbBytes A pb serialized {@link RowFilter} instance
-   * @return An instance of {@link RowFilter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link RowFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static RowFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.RowFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueExcludeFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueExcludeFilter.java
index bbd8ec67994..62f6a046619 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueExcludeFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueExcludeFilter.java
@@ -109,9 +109,9 @@ public class SingleColumnValueExcludeFilter extends SingleColumnValueFilter {
   }
 
   /**
-   * Constructor for protobuf deserialization only. nnnnnn * @deprecated Since 2.0.0. Will be
-   * removed in 3.0.0. Use
-   * {@link #SingleColumnValueExcludeFilter(byte[], byte[], CompareOperator, ByteArrayComparable, boolean, boolean)}
+   * Constructor for protobuf deserialization only.
+   * @deprecated Since 2.0.0. Will be removed in 3.0.0. Use
+   *             {@link #SingleColumnValueExcludeFilter(byte[], byte[], CompareOperator, ByteArrayComparable, boolean, boolean)}
    */
   @Deprecated
   protected SingleColumnValueExcludeFilter(final byte[] family, final byte[] qualifier,
@@ -122,7 +122,7 @@ public class SingleColumnValueExcludeFilter extends SingleColumnValueFilter {
   }
 
   /**
-   * Constructor for protobuf deserialization only. nnnnnn
+   * Constructor for protobuf deserialization only.
    */
   protected SingleColumnValueExcludeFilter(final byte[] family, final byte[] qualifier,
     final CompareOperator op, ByteArrayComparable comparator, final boolean filterIfMissing,
@@ -174,8 +174,8 @@ public class SingleColumnValueExcludeFilter extends SingleColumnValueFilter {
 
   /**
    * @param pbBytes A pb serialized {@link SingleColumnValueExcludeFilter} instance
-   * @return An instance of {@link SingleColumnValueExcludeFilter} made from <code>bytes</code> n
-   *         * @see #toByteArray
+   * @return An instance of {@link SingleColumnValueExcludeFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static SingleColumnValueExcludeFilter parseFrom(final byte[] pbBytes)
     throws DeserializationException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java
index a68fdcd0577..8d7d8f5bce4 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SingleColumnValueFilter.java
@@ -155,10 +155,10 @@ public class SingleColumnValueFilter extends FilterBase {
   }
 
   /**
-   * Constructor for protobuf deserialization only. nnnnnn * @deprecated Since 2.0.0. Will be
-   * removed in 3.0.0. Use
-   * {@link #SingleColumnValueFilter(byte[], byte[], CompareOperator, ByteArrayComparable, boolean, boolean)}
-   * instead.
+   * Constructor for protobuf deserialization only.
+   * @deprecated Since 2.0.0. Will be removed in 3.0.0. Use
+   *             {@link #SingleColumnValueFilter(byte[], byte[], CompareOperator, ByteArrayComparable, boolean, boolean)}
+   *             instead.
    */
   @Deprecated
   protected SingleColumnValueFilter(final byte[] family, final byte[] qualifier,
@@ -169,7 +169,7 @@ public class SingleColumnValueFilter extends FilterBase {
   }
 
   /**
-   * Constructor for protobuf deserialization only. nnnnnn
+   * Constructor for protobuf deserialization only.
    */
   protected SingleColumnValueFilter(final byte[] family, final byte[] qualifier,
     final CompareOperator op, org.apache.hadoop.hbase.filter.ByteArrayComparable comparator,
@@ -180,8 +180,7 @@ public class SingleColumnValueFilter extends FilterBase {
   }
 
   /**
-   * n * @deprecated since 2.0.0. Will be removed in 3.0.0. Use {@link #getCompareOperator()}
-   * instead.
+   * @deprecated since 2.0.0. Will be removed in 3.0.0. Use {@link #getCompareOperator()} instead.
    */
   @Deprecated
   public CompareOp getOperator() {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SkipFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SkipFilter.java
index 4b23a87537d..274ecaf6228 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SkipFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SkipFilter.java
@@ -112,7 +112,8 @@ public class SkipFilter extends FilterBase {
 
   /**
    * @param pbBytes A pb serialized {@link SkipFilter} instance
-   * @return An instance of {@link SkipFilter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link SkipFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static SkipFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.SkipFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SubstringComparator.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SubstringComparator.java
index b5fe22dca24..83ca05a171f 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SubstringComparator.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/SubstringComparator.java
@@ -77,8 +77,8 @@ public class SubstringComparator extends ByteArrayComparable {
 
   /**
    * @param pbBytes A pb serialized {@link SubstringComparator} instance
-   * @return An instance of {@link SubstringComparator} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link SubstringComparator} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static SubstringComparator parseFrom(final byte[] pbBytes)
     throws DeserializationException {
@@ -92,8 +92,8 @@ public class SubstringComparator extends ByteArrayComparable {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   @Override
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/TimestampsFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/TimestampsFilter.java
index eaeaaac3df1..910badbbb70 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/TimestampsFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/TimestampsFilter.java
@@ -54,7 +54,7 @@ public class TimestampsFilter extends FilterBase {
   long minTimestamp = Long.MAX_VALUE;
 
   /**
-   * Constructor for filter that retains only the specified timestamps in the list. n
+   * Constructor for filter that retains only the specified timestamps in the list.
    */
   public TimestampsFilter(List<Long> timestamps) {
     this(timestamps, false);
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ValueFilter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ValueFilter.java
index e726d88f720..461f80302cd 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ValueFilter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ValueFilter.java
@@ -97,7 +97,8 @@ public class ValueFilter extends CompareFilter {
 
   /**
    * @param pbBytes A pb serialized {@link ValueFilter} instance
-   * @return An instance of {@link ValueFilter} made from <code>bytes</code> n * @see #toByteArray
+   * @return An instance of {@link ValueFilter} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static ValueFilter parseFrom(final byte[] pbBytes) throws DeserializationException {
     FilterProtos.ValueFilter proto;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/CellBlockBuilder.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/CellBlockBuilder.java
index 9e9c0688ece..a6cac1043f2 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/CellBlockBuilder.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/CellBlockBuilder.java
@@ -104,9 +104,10 @@ class CellBlockBuilder {
 
   /**
    * Puts CellScanner Cells into a cell block using passed in <code>codec</code> and/or
-   * <code>compressor</code>. nnn * @return Null or byte buffer filled with a cellblock filled with
-   * passed-in Cells encoded using passed in <code>codec</code> and/or <code>compressor</code>; the
-   * returned buffer has been flipped and is ready for reading. Use limit to find total size. n
+   * <code>compressor</code>.
+   * @return Null or byte buffer filled with a cellblock filled with passed-in Cells encoded using
+   *         passed in <code>codec</code> and/or <code>compressor</code>; the returned buffer has
+   *         been flipped and is ready for reading. Use limit to find total size.
    */
   public ByteBuffer buildCellBlock(final Codec codec, final CompressionCodec compressor,
     final CellScanner cellScanner) throws IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
index 28afef07e55..2095fc82cb9 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/protobuf/ProtobufUtil.java
@@ -255,7 +255,7 @@ public final class ProtobufUtil {
    * Like {@link #getRemoteException(ServiceException)} but more generic, able to handle more than
    * just {@link ServiceException}. Prefer this method to
    * {@link #getRemoteException(ServiceException)} because trying to contain direct protobuf
-   * references. n
+   * references.
    */
   public static IOException handleRemoteException(Exception e) {
     return makeIOExceptionOfException(e);
@@ -359,7 +359,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Get to a client Get
    * @param proto the protocol buffer Get to convert
-   * @return the converted client Get n
+   * @return the converted client Get
    */
   public static Get toGet(final ClientProtos.Get proto) throws IOException {
     if (proto == null) return null;
@@ -444,7 +444,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Mutate to a Put.
    * @param proto The protocol buffer MutationProto to convert
-   * @return A client Put. n
+   * @return A client Put.
    */
   public static Put toPut(final MutationProto proto) throws IOException {
     return toPut(proto, null);
@@ -454,7 +454,7 @@ public final class ProtobufUtil {
    * Convert a protocol buffer Mutate to a Put.
    * @param proto       The protocol buffer MutationProto to convert
    * @param cellScanner If non-null, the Cell data that goes with this proto.
-   * @return A client Put. n
+   * @return A client Put.
    */
   public static Put toPut(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -538,7 +538,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Mutate to a Delete
    * @param proto the protocol buffer Mutate to convert
-   * @return the converted client Delete n
+   * @return the converted client Delete
    */
   public static Delete toDelete(final MutationProto proto) throws IOException {
     return toDelete(proto, null);
@@ -548,7 +548,7 @@ public final class ProtobufUtil {
    * Convert a protocol buffer Mutate to a Delete
    * @param proto       the protocol buffer Mutate to convert
    * @param cellScanner if non-null, the data that goes with this delete.
-   * @return the converted client Delete n
+   * @return the converted client Delete
    */
   public static Delete toDelete(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -675,9 +675,9 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer Mutate to an Append n * @param proto the protocol buffer Mutate to
-   * convert
-   * @return the converted client Append n
+   * Convert a protocol buffer Mutate to an Append
+   * @param proto the protocol buffer Mutate to convert
+   * @return the converted client Append
    */
   public static Append toAppend(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -695,7 +695,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Mutate to an Increment
    * @param proto the protocol buffer Mutate to convert
-   * @return the converted client Increment n
+   * @return the converted client Increment
    */
   public static Increment toIncrement(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -714,7 +714,7 @@ public final class ProtobufUtil {
   /**
    * Convert a MutateRequest to Mutation
    * @param proto the protocol buffer Mutate to convert
-   * @return the converted Mutation n
+   * @return the converted Mutation
    */
   public static Mutation toMutation(final MutationProto proto) throws IOException {
     MutationType type = proto.getMutateType();
@@ -735,7 +735,8 @@ public final class ProtobufUtil {
 
   /**
    * Convert a protocol buffer Mutate to a Get.
-   * @param proto the protocol buffer Mutate to convert. n * @return the converted client get. n
+   * @param proto the protocol buffer Mutate to convert.
+   * @return the converted client get.
    */
   public static Get toGet(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -815,7 +816,7 @@ public final class ProtobufUtil {
   /**
    * Convert a client Scan to a protocol buffer Scan
    * @param scan the client Scan to convert
-   * @return the converted protocol buffer Scan n
+   * @return the converted protocol buffer Scan
    */
   public static ClientProtos.Scan toScan(final Scan scan) throws IOException {
     ClientProtos.Scan.Builder scanBuilder = ClientProtos.Scan.newBuilder();
@@ -908,7 +909,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Scan to a client Scan
    * @param proto the protocol buffer Scan to convert
-   * @return the converted client Scan n
+   * @return the converted client Scan
    */
   public static Scan toScan(final ClientProtos.Scan proto) throws IOException {
     byte[] startRow = HConstants.EMPTY_START_ROW;
@@ -1009,7 +1010,7 @@ public final class ProtobufUtil {
   /**
    * Create a protocol buffer Get based on a client Get.
    * @param get the client Get
-   * @return a protocol buffer Get n
+   * @return a protocol buffer Get
    */
   public static ClientProtos.Get toGet(final Get get) throws IOException {
     ClientProtos.Get.Builder builder = ClientProtos.Get.newBuilder();
@@ -1074,7 +1075,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Create a protocol buffer Mutate based on a client Mutation nn * @return a protobuf'd Mutation n
+   * Create a protocol buffer Mutate based on a client Mutation
+   * @return a protobuf'd Mutation
    */
   public static MutationProto toMutation(final MutationType type, final Mutation mutation,
     final long nonce) throws IOException {
@@ -1123,8 +1125,8 @@ public final class ProtobufUtil {
 
   /**
    * Create a protocol buffer MutationProto based on a client Mutation. Does NOT include data.
-   * Understanding is that the Cell will be transported other than via protobuf. nnn * @return a
-   * protobuf'd Mutation n
+   * Understanding is that the Cell will be transported other than via protobuf.
+   * @return a protobuf'd Mutation
    */
   public static MutationProto toMutationNoData(final MutationType type, final Mutation mutation,
     final MutationProto.Builder builder) throws IOException {
@@ -1133,8 +1135,8 @@ public final class ProtobufUtil {
 
   /**
    * Create a protocol buffer MutationProto based on a client Mutation. Does NOT include data.
-   * Understanding is that the Cell will be transported other than via protobuf. nn * @return a
-   * protobuf'd Mutation n
+   * Understanding is that the Cell will be transported other than via protobuf.
+   * @return a protobuf'd Mutation
    */
   public static MutationProto toMutationNoData(final MutationType type, final Mutation mutation)
     throws IOException {
@@ -1160,8 +1162,8 @@ public final class ProtobufUtil {
 
   /**
    * Code shared by {@link #toMutation(MutationType, Mutation)} and
-   * {@link #toMutationNoData(MutationType, Mutation)} nn * @return A partly-filled out protobuf'd
-   * Mutation.
+   * {@link #toMutationNoData(MutationType, Mutation)}
+   * @return A partly-filled out protobuf'd Mutation.
    */
   private static MutationProto.Builder getMutationBuilderAndSetCommonFields(final MutationType type,
     final Mutation mutation, MutationProto.Builder builder) {
@@ -1266,7 +1268,7 @@ public final class ProtobufUtil {
    * Convert a protocol buffer Result to a client Result
    * @param proto   the protocol buffer Result to convert
    * @param scanner Optional cell scanner.
-   * @return the converted client Result n
+   * @return the converted client Result
    */
   public static Result toResult(final ClientProtos.Result proto, final CellScanner scanner)
     throws IOException {
@@ -1380,8 +1382,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a delete KeyValue type to protocol buffer DeleteType. n * @return protocol buffer
-   * DeleteType n
+   * Convert a delete KeyValue type to protocol buffer DeleteType.
+   * @return protocol buffer DeleteType
    */
   public static DeleteType toDeleteType(KeyValue.Type type) throws IOException {
     switch (type) {
@@ -1401,7 +1403,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer DeleteType to delete KeyValue type.
    * @param type The DeleteType
-   * @return The type. n
+   * @return The type.
    */
   public static KeyValue.Type fromDeleteType(DeleteType type) throws IOException {
     switch (type) {
@@ -1565,7 +1567,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeFrom avoids the hard-coded 64MB limit for decoding buffers when
    * working with byte arrays
    * @param builder current message builder
-   * @param b       byte array n
+   * @param b       byte array
    */
   public static void mergeFrom(Message.Builder builder, byte[] b) throws IOException {
     final CodedInputStream codedInput = CodedInputStream.newInstance(b);
@@ -1578,7 +1580,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeFrom avoids the hard-coded 64MB limit for decoding buffers when
    * working with byte arrays
    * @param builder current message builder
-   * @param b       byte array nnn
+   * @param b       byte array
    */
   public static void mergeFrom(Message.Builder builder, byte[] b, int offset, int length)
     throws IOException {
@@ -1632,7 +1634,7 @@ public final class ProtobufUtil {
    *             magic and that is then followed by a protobuf that has a serialized
    *             {@link ServerName} in it.
    * @return Returns null if <code>data</code> is null else converts passed data to a ServerName
-   *         instance. n
+   *         instance.
    */
   public static ServerName toServerName(final byte[] data) throws DeserializationException {
     if (data == null || data.length <= 0) return null;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/LeaseException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/LeaseException.java
index d63f28cdab8..155c721b98a 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/LeaseException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/LeaseException.java
@@ -34,8 +34,7 @@ public class LeaseException extends DoNotRetryIOException {
   }
 
   /**
-   * n
-   */
+   *   */
   public LeaseException(String message) {
     super(message);
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedLogCloseException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedLogCloseException.java
index 2e2a3a895ce..c0330034810 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedLogCloseException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedLogCloseException.java
@@ -33,8 +33,7 @@ public class FailedLogCloseException extends IOException {
   }
 
   /**
-   * n
-   */
+   *   */
   public FailedLogCloseException(String msg) {
     super(msg);
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedSyncBeforeLogCloseException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedSyncBeforeLogCloseException.java
index feab0b07f2f..a2a43203b64 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedSyncBeforeLogCloseException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FailedSyncBeforeLogCloseException.java
@@ -32,8 +32,7 @@ public class FailedSyncBeforeLogCloseException extends FailedLogCloseException {
   }
 
   /**
-   * n
-   */
+   *   */
   public FailedSyncBeforeLogCloseException(String msg) {
     super(msg);
   }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/AbstractHBaseSaslRpcClient.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/AbstractHBaseSaslRpcClient.java
index 7be1ac630e1..b2bf6a4f536 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/AbstractHBaseSaslRpcClient.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/AbstractHBaseSaslRpcClient.java
@@ -50,7 +50,7 @@ public abstract class AbstractHBaseSaslRpcClient {
    * @param token           token to use if needed by the authentication method
    * @param serverAddr      the address of the hbase service
    * @param securityInfo    the security details for the remote hbase service
-   * @param fallbackAllowed does the client allow fallback to simple authentication n
+   * @param fallbackAllowed does the client allow fallback to simple authentication
    */
   protected AbstractHBaseSaslRpcClient(Configuration conf,
     SaslClientAuthenticationProvider provider, Token<? extends TokenIdentifier> token,
@@ -66,7 +66,7 @@ public abstract class AbstractHBaseSaslRpcClient {
    * @param serverAddr      the address of the hbase service
    * @param securityInfo    the security details for the remote hbase service
    * @param fallbackAllowed does the client allow fallback to simple authentication
-   * @param rpcProtection   the protection level ("authentication", "integrity" or "privacy") n
+   * @param rpcProtection   the protection level ("authentication", "integrity" or "privacy")
    */
   protected AbstractHBaseSaslRpcClient(Configuration conf,
     SaslClientAuthenticationProvider provider, Token<? extends TokenIdentifier> token,
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/EncryptionUtil.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/EncryptionUtil.java
index 5a816877ba8..6c755f9a94c 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/EncryptionUtil.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/EncryptionUtil.java
@@ -62,7 +62,7 @@ public final class EncryptionUtil {
    * @param conf      configuration
    * @param key       the raw key bytes
    * @param algorithm the algorithm to use with this key material
-   * @return the encrypted key bytes n
+   * @return the encrypted key bytes
    */
   public static byte[] wrapKey(Configuration conf, byte[] key, String algorithm)
     throws IOException {
@@ -115,7 +115,7 @@ public final class EncryptionUtil {
    * @param conf    configuration
    * @param subject subject key alias
    * @param value   the encrypted key bytes
-   * @return the raw key bytes nn
+   * @return the raw key bytes
    */
   public static Key unwrapKey(Configuration conf, String subject, byte[] value)
     throws IOException, KeyException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/HBaseSaslRpcClient.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/HBaseSaslRpcClient.java
index 93ad9245f65..0394bb0f2a3 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/HBaseSaslRpcClient.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/HBaseSaslRpcClient.java
@@ -86,7 +86,7 @@ public class HBaseSaslRpcClient extends AbstractHBaseSaslRpcClient {
    * Do client side SASL authentication with server via the given InputStream and OutputStream
    * @param inS  InputStream to use
    * @param outS OutputStream to use
-   * @return true if connection is set up, or false if needs to switch to simple Auth. n
+   * @return true if connection is set up, or false if needs to switch to simple Auth.
    */
   public boolean saslConnect(InputStream inS, OutputStream outS) throws IOException {
     DataInputStream inStream = new DataInputStream(new BufferedInputStream(inS));
@@ -185,7 +185,7 @@ public class HBaseSaslRpcClient extends AbstractHBaseSaslRpcClient {
 
   /**
    * Get a SASL wrapped InputStream. Can be called only after saslConnect() has been called.
-   * @return a SASL wrapped InputStream n
+   * @return a SASL wrapped InputStream
    */
   public InputStream getInputStream() throws IOException {
     if (!saslClient.isComplete()) {
@@ -248,7 +248,7 @@ public class HBaseSaslRpcClient extends AbstractHBaseSaslRpcClient {
 
   /**
    * Get a SASL wrapped OutputStream. Can be called only after saslConnect() has been called.
-   * @return a SASL wrapped OutputStream n
+   * @return a SASL wrapped OutputStream
    */
   public OutputStream getOutputStream() throws IOException {
     if (!saslClient.isComplete()) {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlClient.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlClient.java
index c6c0c2ecde5..01cb8718bac 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlClient.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlClient.java
@@ -49,7 +49,7 @@ public class AccessControlClient {
   /**
    * Return true if authorization is supported and enabled
    * @param connection The connection to use
-   * @return true if authorization is supported and enabled, false otherwise n
+   * @return true if authorization is supported and enabled, false otherwise
    */
   public static boolean isAuthorizationEnabled(Connection connection) throws IOException {
     return connection.getAdmin().getSecurityCapabilities()
@@ -59,7 +59,7 @@ public class AccessControlClient {
   /**
    * Return true if cell authorization is supported and enabled
    * @param connection The connection to use
-   * @return true if cell authorization is supported and enabled, false otherwise n
+   * @return true if cell authorization is supported and enabled, false otherwise
    */
   public static boolean isCellAuthorizationEnabled(Connection connection) throws IOException {
     return connection.getAdmin().getSecurityCapabilities()
@@ -74,9 +74,10 @@ public class AccessControlClient {
 
   /**
    * Grants permission on the specified table for the specified user
-   * @param connection The Connection instance to use nnnn * @param mergeExistingPermissions If set
-   *                   to false, later granted permissions will override previous granted
-   *                   permissions. otherwise, it'll merge with previous granted permissions. nn
+   * @param connection               The Connection instance to use
+   * @param mergeExistingPermissions If set to false, later granted permissions will override
+   *                                 previous granted permissions. otherwise, it'll merge with
+   *                                 previous granted permissions.
    */
   private static void grant(Connection connection, final TableName tableName, final String userName,
     final byte[] family, final byte[] qual, boolean mergeExistingPermissions,
@@ -89,7 +90,7 @@ public class AccessControlClient {
   /**
    * Grants permission on the specified table for the specified user. If permissions for a specified
    * user exists, later granted permissions will override previous granted permissions.
-   * @param connection The Connection instance to use nnnnnn
+   * @param connection The Connection instance to use
    */
   public static void grant(Connection connection, final TableName tableName, final String userName,
     final byte[] family, final byte[] qual, final Permission.Action... actions) throws Throwable {
@@ -97,9 +98,10 @@ public class AccessControlClient {
   }
 
   /**
-   * Grants permission on the specified namespace for the specified user. nnn * @param
-   * mergeExistingPermissions If set to false, later granted permissions will override previous
-   * granted permissions. otherwise, it'll merge with previous granted permissions. nn
+   * Grants permission on the specified namespace for the specified user.
+   * @param mergeExistingPermissions If set to false, later granted permissions will override
+   *                                 previous granted permissions. otherwise, it'll merge with
+   *                                 previous granted permissions.
    */
   private static void grant(Connection connection, final String namespace, final String userName,
     boolean mergeExistingPermissions, final Permission.Action... actions) throws Throwable {
@@ -112,7 +114,7 @@ public class AccessControlClient {
    * Grants permission on the specified namespace for the specified user. If permissions on the
    * specified namespace exists, later granted permissions will override previous granted
    * permissions.
-   * @param connection The Connection instance to use nnnn
+   * @param connection The Connection instance to use
    */
   public static void grant(Connection connection, final String namespace, final String userName,
     final Permission.Action... actions) throws Throwable {
@@ -120,9 +122,10 @@ public class AccessControlClient {
   }
 
   /**
-   * Grant global permissions for the specified user. nn * @param mergeExistingPermissions If set to
-   * false, later granted permissions will override previous granted permissions. otherwise, it'll
-   * merge with previous granted permissions. nn
+   * Grant global permissions for the specified user.
+   * @param mergeExistingPermissions If set to false, later granted permissions will override
+   *                                 previous granted permissions. otherwise, it'll merge with
+   *                                 previous granted permissions.
    */
   private static void grant(Connection connection, final String userName,
     boolean mergeExistingPermissions, final Permission.Action... actions) throws Throwable {
@@ -133,7 +136,7 @@ public class AccessControlClient {
 
   /**
    * Grant global permissions for the specified user. If permissions for the specified user exists,
-   * later granted permissions will override previous granted permissions. nnnn
+   * later granted permissions will override previous granted permissions.
    */
   public static void grant(Connection connection, final String userName,
     final Permission.Action... actions) throws Throwable {
@@ -149,7 +152,7 @@ public class AccessControlClient {
 
   /**
    * Revokes the permission on the table
-   * @param connection The Connection instance to use nnnnnn
+   * @param connection The Connection instance to use
    */
   public static void revoke(Connection connection, final TableName tableName, final String username,
     final byte[] family, final byte[] qualifier, final Permission.Action... actions)
@@ -160,7 +163,7 @@ public class AccessControlClient {
 
   /**
    * Revokes the permission on the namespace for the specified user.
-   * @param connection The Connection instance to use nnnn
+   * @param connection The Connection instance to use
    */
   public static void revoke(Connection connection, final String namespace, final String userName,
     final Permission.Action... actions) throws Throwable {
@@ -184,7 +187,7 @@ public class AccessControlClient {
    * along with the list of superusers would be returned. Else, no rows get returned.
    * @param connection The Connection instance to use
    * @param tableRegex The regular expression string to match against
-   * @return List of UserPermissions n
+   * @return List of UserPermissions
    */
   public static List<UserPermission> getUserPermissions(Connection connection, String tableRegex)
     throws Throwable {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlUtil.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlUtil.java
index 6496aaa0bb8..8e7a00d8ea4 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlUtil.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/access/AccessControlUtil.java
@@ -452,8 +452,8 @@ public class AccessControlUtil {
    * It's also called by the shell, in case you want to find references.
    * @param protocol      the AccessControlService protocol proxy
    * @param userShortName the short name of the user to grant permissions
-   * @param actions       the permissions to be granted n * @deprecated Use
-   *                      {@link Admin#grant(UserPermission, boolean)} instead.
+   * @param actions       the permissions to be granted
+   * @deprecated Use {@link Admin#grant(UserPermission, boolean)} instead.
    */
   @Deprecated
   public static void grant(RpcController controller,
@@ -480,8 +480,8 @@ public class AccessControlUtil {
    * @param tableName     optional table name
    * @param f             optional column family
    * @param q             optional qualifier
-   * @param actions       the permissions to be granted n * @deprecated Use
-   *                      {@link Admin#grant(UserPermission, boolean)} instead.
+   * @param actions       the permissions to be granted
+   * @deprecated Use {@link Admin#grant(UserPermission, boolean)} instead.
    */
   @Deprecated
   public static void grant(RpcController controller,
@@ -506,8 +506,8 @@ public class AccessControlUtil {
    * @param controller RpcController
    * @param protocol   the AccessControlService protocol proxy
    * @param namespace  the short name of the user to grant permissions
-   * @param actions    the permissions to be granted n * @deprecated Use
-   *                   {@link Admin#grant(UserPermission, boolean)} instead.
+   * @param actions    the permissions to be granted
+   * @deprecated Use {@link Admin#grant(UserPermission, boolean)} instead.
    */
   @Deprecated
   public static void grant(RpcController controller,
@@ -623,9 +623,8 @@ public class AccessControlUtil {
    * A utility used to get user's global permissions based on the specified user name.
    * @param controller RpcController
    * @param protocol   the AccessControlService protocol proxy
-   * @param userName   User name, if empty then all user permissions will be retrieved. n
-   *                   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)}
-   *                   instead.
+   * @param userName   User name, if empty then all user permissions will be retrieved.
+   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
    */
   @Deprecated
   public static List<UserPermission> getUserPermissions(RpcController controller,
@@ -653,8 +652,8 @@ public class AccessControlUtil {
    * It's also called by the shell, in case you want to find references.
    * @param controller RpcController
    * @param protocol   the AccessControlService protocol proxy
-   * @param t          optional table name n * @deprecated Use
-   *                   {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
+   * @param t          optional table name
+   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
    */
   @Deprecated
   public static List<UserPermission> getUserPermissions(RpcController controller,
@@ -670,9 +669,8 @@ public class AccessControlUtil {
    * @param t               optional table name
    * @param columnFamily    Column family
    * @param columnQualifier Column qualifier
-   * @param userName        User name, if empty then all user permissions will be retrieved. n
-   *                        * @deprecated Use
-   *                        {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
+   * @param userName        User name, if empty then all user permissions will be retrieved.
+   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
    */
   @Deprecated
   public static List<UserPermission> getUserPermissions(RpcController controller,
@@ -710,8 +708,8 @@ public class AccessControlUtil {
    * It's also called by the shell, in case you want to find references.
    * @param controller RpcController
    * @param protocol   the AccessControlService protocol proxy
-   * @param namespace  name of the namespace n * @deprecated Use
-   *                   {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
+   * @param namespace  name of the namespace
+   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
    */
   @Deprecated
   public static List<UserPermission> getUserPermissions(RpcController controller,
@@ -724,9 +722,8 @@ public class AccessControlUtil {
    * @param controller RpcController
    * @param protocol   the AccessControlService protocol proxy
    * @param namespace  name of the namespace
-   * @param userName   User name, if empty then all user permissions will be retrieved. n
-   *                   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)}
-   *                   instead.
+   * @param userName   User name, if empty then all user permissions will be retrieved.
+   * @deprecated Use {@link Admin#getUserPermissions(GetUserPermissionsRequest)} instead.
    */
   @Deprecated
   public static List<UserPermission> getUserPermissions(RpcController controller,
@@ -764,8 +761,8 @@ public class AccessControlUtil {
    *                        will not be considered if columnFamily is passed as null or empty.
    * @param userName        User name, it shouldn't be null or empty.
    * @param actions         Actions
-   * @return true if access allowed, otherwise false n * @deprecated Use
-   *         {@link Admin#hasUserPermissions(String, List)} instead.
+   * @return true if access allowed, otherwise false
+   * @deprecated Use {@link Admin#hasUserPermissions(String, List)} instead.
    */
   @Deprecated
   public static boolean hasPermission(RpcController controller,
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityClient.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityClient.java
index cca5e8362ef..c08ce7c6cf7 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityClient.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityClient.java
@@ -55,7 +55,7 @@ public class VisibilityClient {
   /**
    * Return true if cell visibility features are supported and enabled
    * @param connection The connection to use
-   * @return true if cell visibility features are supported and enabled, false otherwise n
+   * @return true if cell visibility features are supported and enabled, false otherwise
    */
   public static boolean isCellVisibilityEnabled(Connection connection) throws IOException {
     return connection.getAdmin().getSecurityCapabilities()
@@ -63,8 +63,8 @@ public class VisibilityClient {
   }
 
   /**
-   * Utility method for adding label to the system. nnnn * @deprecated Use
-   * {@link #addLabel(Connection,String)} instead.
+   * Utility method for adding label to the system.
+   * @deprecated Use {@link #addLabel(Connection,String)} instead.
    */
   @Deprecated
   public static VisibilityLabelsResponse addLabel(Configuration conf, final String label)
@@ -75,7 +75,7 @@ public class VisibilityClient {
   }
 
   /**
-   * Utility method for adding label to the system. nnnn
+   * Utility method for adding label to the system.
    */
   public static VisibilityLabelsResponse addLabel(Connection connection, final String label)
     throws Throwable {
@@ -83,8 +83,8 @@ public class VisibilityClient {
   }
 
   /**
-   * Utility method for adding labels to the system. nnnn * @deprecated Use
-   * {@link #addLabels(Connection,String[])} instead.
+   * Utility method for adding labels to the system.
+   * @deprecated Use {@link #addLabels(Connection,String[])} instead.
    */
   @Deprecated
   public static VisibilityLabelsResponse addLabels(Configuration conf, final String[] labels)
@@ -95,7 +95,7 @@ public class VisibilityClient {
   }
 
   /**
-   * Utility method for adding labels to the system. nnnn
+   * Utility method for adding labels to the system.
    */
   public static VisibilityLabelsResponse addLabels(Connection connection, final String[] labels)
     throws Throwable {
@@ -133,8 +133,8 @@ public class VisibilityClient {
   }
 
   /**
-   * Sets given labels globally authorized for the user. nnnnn * @deprecated Use
-   * {@link #setAuths(Connection,String[],String)} instead.
+   * Sets given labels globally authorized for the user.
+   * @deprecated Use {@link #setAuths(Connection,String[],String)} instead.
    */
   @Deprecated
   public static VisibilityLabelsResponse setAuths(Configuration conf, final String[] auths,
@@ -145,7 +145,7 @@ public class VisibilityClient {
   }
 
   /**
-   * Sets given labels globally authorized for the user. nnnnn
+   * Sets given labels globally authorized for the user.
    */
   public static VisibilityLabelsResponse setAuths(Connection connection, final String[] auths,
     final String user) throws Throwable {
@@ -153,8 +153,8 @@ public class VisibilityClient {
   }
 
   /**
-   * nn * @return labels, the given user is globally authorized for. n * @deprecated Use
-   * {@link #getAuths(Connection,String)} instead.
+   * Returns labels, the given user is globally authorized for.
+   * @deprecated Use {@link #getAuths(Connection,String)} instead.
    */
   @Deprecated
   public static GetAuthsResponse getAuths(Configuration conf, final String user) throws Throwable {
@@ -164,8 +164,8 @@ public class VisibilityClient {
   }
 
   /**
-   * @param connection the Connection instance to use. n * @return labels, the given user is
-   *                   globally authorized for. n
+   * @param connection the Connection instance to use.
+   * @return labels, the given user is globally authorized for.
    */
   public static GetAuthsResponse getAuths(Connection connection, final String user)
     throws Throwable {
@@ -196,10 +196,10 @@ public class VisibilityClient {
   }
 
   /**
-   * Retrieve the list of visibility labels defined in the system. n * @param regex The regular
-   * expression to filter which labels are returned.
-   * @return labels The list of visibility labels defined in the system. n * @deprecated Use
-   *         {@link #listLabels(Connection,String)} instead.
+   * Retrieve the list of visibility labels defined in the system.
+   * @param regex The regular expression to filter which labels are returned.
+   * @return labels The list of visibility labels defined in the system.
+   * @deprecated Use {@link #listLabels(Connection,String)} instead.
    */
   @Deprecated
   public static ListLabelsResponse listLabels(Configuration conf, final String regex)
@@ -213,7 +213,7 @@ public class VisibilityClient {
    * Retrieve the list of visibility labels defined in the system.
    * @param connection The Connection instance to use.
    * @param regex      The regular expression to filter which labels are returned.
-   * @return labels The list of visibility labels defined in the system. n
+   * @return labels The list of visibility labels defined in the system.
    */
   public static ListLabelsResponse listLabels(Connection connection, final String regex)
     throws Throwable {
@@ -249,8 +249,8 @@ public class VisibilityClient {
   }
 
   /**
-   * Removes given labels from user's globally authorized list of labels. nnnnn * @deprecated Use
-   * {@link #clearAuths(Connection,String[],String)} instead.
+   * Removes given labels from user's globally authorized list of labels.
+   * @deprecated Use {@link #clearAuths(Connection,String[],String)} instead.
    */
   @Deprecated
   public static VisibilityLabelsResponse clearAuths(Configuration conf, final String[] auths,
@@ -261,7 +261,7 @@ public class VisibilityClient {
   }
 
   /**
-   * Removes given labels from user's globally authorized list of labels. nnnnn
+   * Removes given labels from user's globally authorized list of labels.
    */
   public static VisibilityLabelsResponse clearAuths(Connection connection, final String[] auths,
     final String user) throws Throwable {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java
index 75e987591d9..2584216aa09 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java
@@ -356,7 +356,7 @@ public final class ProtobufUtil {
    * Like {@link #getRemoteException(ServiceException)} but more generic, able to handle more than
    * just {@link ServiceException}. Prefer this method to
    * {@link #getRemoteException(ServiceException)} because trying to contain direct protobuf
-   * references. n
+   * references.
    */
   public static IOException handleRemoteException(Exception e) {
     return makeIOExceptionOfException(e);
@@ -517,7 +517,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Get to a client Get
    * @param proto the protocol buffer Get to convert
-   * @return the converted client Get n
+   * @return the converted client Get
    */
   public static Get toGet(final ClientProtos.Get proto) throws IOException {
     if (proto == null) return null;
@@ -602,7 +602,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Mutate to a Put.
    * @param proto The protocol buffer MutationProto to convert
-   * @return A client Put. n
+   * @return A client Put.
    */
   public static Put toPut(final MutationProto proto) throws IOException {
     return toPut(proto, null);
@@ -612,7 +612,7 @@ public final class ProtobufUtil {
    * Convert a protocol buffer Mutate to a Put.
    * @param proto       The protocol buffer MutationProto to convert
    * @param cellScanner If non-null, the Cell data that goes with this proto.
-   * @return A client Put. n
+   * @return A client Put.
    */
   public static Put toPut(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -696,7 +696,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Mutate to a Delete
    * @param proto the protocol buffer Mutate to convert
-   * @return the converted client Delete n
+   * @return the converted client Delete
    */
   public static Delete toDelete(final MutationProto proto) throws IOException {
     return toDelete(proto, null);
@@ -706,7 +706,7 @@ public final class ProtobufUtil {
    * Convert a protocol buffer Mutate to a Delete
    * @param proto       the protocol buffer Mutate to convert
    * @param cellScanner if non-null, the data that goes with this delete.
-   * @return the converted client Delete n
+   * @return the converted client Delete
    */
   public static Delete toDelete(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -836,9 +836,9 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer Mutate to an Append n * @param proto the protocol buffer Mutate to
-   * convert
-   * @return the converted client Append n
+   * Convert a protocol buffer Mutate to an Append
+   * @param proto the protocol buffer Mutate to convert
+   * @return the converted client Append
    */
   public static Append toAppend(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -856,7 +856,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Mutate to an Increment
    * @param proto the protocol buffer Mutate to convert
-   * @return the converted client Increment n
+   * @return the converted client Increment
    */
   public static Increment toIncrement(final MutationProto proto, final CellScanner cellScanner)
     throws IOException {
@@ -875,7 +875,7 @@ public final class ProtobufUtil {
   /**
    * Convert a MutateRequest to Mutation
    * @param proto the protocol buffer Mutate to convert
-   * @return the converted Mutation n
+   * @return the converted Mutation
    */
   public static Mutation toMutation(final MutationProto proto) throws IOException {
     MutationType type = proto.getMutateType();
@@ -923,7 +923,7 @@ public final class ProtobufUtil {
   /**
    * Convert a client Scan to a protocol buffer Scan
    * @param scan the client Scan to convert
-   * @return the converted protocol buffer Scan n
+   * @return the converted protocol buffer Scan
    */
   public static ClientProtos.Scan toScan(final Scan scan) throws IOException {
     ClientProtos.Scan.Builder scanBuilder = ClientProtos.Scan.newBuilder();
@@ -1020,7 +1020,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer Scan to a client Scan
    * @param proto the protocol buffer Scan to convert
-   * @return the converted client Scan n
+   * @return the converted client Scan
    */
   public static Scan toScan(final ClientProtos.Scan proto) throws IOException {
     byte[] startRow = HConstants.EMPTY_START_ROW;
@@ -1145,7 +1145,7 @@ public final class ProtobufUtil {
   /**
    * Create a protocol buffer Get based on a client Get.
    * @param get the client Get
-   * @return a protocol buffer Get n
+   * @return a protocol buffer Get
    */
   public static ClientProtos.Get toGet(final Get get) throws IOException {
     ClientProtos.Get.Builder builder = ClientProtos.Get.newBuilder();
@@ -1211,7 +1211,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Create a protocol buffer Mutate based on a client Mutation nn * @return a protobuf'd Mutation n
+   * Create a protocol buffer Mutate based on a client Mutation
+   * @return a protobuf'd Mutation
    */
   public static MutationProto toMutation(final MutationType type, final Mutation mutation,
     final long nonce) throws IOException {
@@ -1260,8 +1261,8 @@ public final class ProtobufUtil {
 
   /**
    * Create a protocol buffer MutationProto based on a client Mutation. Does NOT include data.
-   * Understanding is that the Cell will be transported other than via protobuf. nnn * @return a
-   * protobuf'd Mutation n
+   * Understanding is that the Cell will be transported other than via protobuf.
+   * @return a protobuf'd Mutation
    */
   public static MutationProto toMutationNoData(final MutationType type, final Mutation mutation,
     final MutationProto.Builder builder) throws IOException {
@@ -1270,8 +1271,8 @@ public final class ProtobufUtil {
 
   /**
    * Create a protocol buffer MutationProto based on a client Mutation. Does NOT include data.
-   * Understanding is that the Cell will be transported other than via protobuf. nn * @return a
-   * protobuf'd Mutation n
+   * Understanding is that the Cell will be transported other than via protobuf.
+   * @return a protobuf'd Mutation
    */
   public static MutationProto toMutationNoData(final MutationType type, final Mutation mutation)
     throws IOException {
@@ -1297,8 +1298,8 @@ public final class ProtobufUtil {
 
   /**
    * Code shared by {@link #toMutation(MutationType, Mutation)} and
-   * {@link #toMutationNoData(MutationType, Mutation)} nn * @return A partly-filled out protobuf'd
-   * Mutation.
+   * {@link #toMutationNoData(MutationType, Mutation)}
+   * @return A partly-filled out protobuf'd Mutation.
    */
   private static MutationProto.Builder getMutationBuilderAndSetCommonFields(final MutationType type,
     final Mutation mutation, MutationProto.Builder builder) {
@@ -1431,7 +1432,7 @@ public final class ProtobufUtil {
    * Convert a protocol buffer Result to a client Result
    * @param proto   the protocol buffer Result to convert
    * @param scanner Optional cell scanner.
-   * @return the converted client Result n
+   * @return the converted client Result
    */
   public static Result toResult(final ClientProtos.Result proto, final CellScanner scanner)
     throws IOException {
@@ -1546,8 +1547,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a delete KeyValue type to protocol buffer DeleteType. n * @return protocol buffer
-   * DeleteType n
+   * Convert a delete KeyValue type to protocol buffer DeleteType.
+   * @return protocol buffer DeleteType
    */
   public static DeleteType toDeleteType(KeyValue.Type type) throws IOException {
     switch (type) {
@@ -1567,7 +1568,7 @@ public final class ProtobufUtil {
   /**
    * Convert a protocol buffer DeleteType to delete KeyValue type.
    * @param type The DeleteType
-   * @return The type. n
+   * @return The type.
    */
   public static KeyValue.Type fromDeleteType(DeleteType type) throws IOException {
     switch (type) {
@@ -1658,7 +1659,7 @@ public final class ProtobufUtil {
   }
 
   /**
-   * A helper to close a region given a region name using admin protocol. nnn
+   * A helper to close a region given a region name using admin protocol.
    */
   public static void closeRegion(final RpcController controller,
     final AdminService.BlockingInterface admin, final ServerName server, final byte[] regionName)
@@ -1673,7 +1674,7 @@ public final class ProtobufUtil {
   }
 
   /**
-   * A helper to warmup a region given a region name using admin protocol nn *
+   * A helper to warmup a region given a region name using admin protocol
    */
   public static void warmupRegion(final RpcController controller,
     final AdminService.BlockingInterface admin,
@@ -1690,7 +1691,7 @@ public final class ProtobufUtil {
   }
 
   /**
-   * A helper to open a region using admin protocol. nnn
+   * A helper to open a region using admin protocol.
    */
   public static void openRegion(final RpcController controller,
     final AdminService.BlockingInterface admin, ServerName server,
@@ -1704,8 +1705,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * A helper to get the all the online regions on a region server using admin protocol. n * @return
-   * a list of online region info n
+   * A helper to get the all the online regions on a region server using admin protocol.
+   * @return a list of online region info
    */
   public static List<org.apache.hadoop.hbase.client.RegionInfo>
     getOnlineRegions(final AdminService.BlockingInterface admin) throws IOException {
@@ -2041,7 +2042,8 @@ public final class ProtobufUtil {
   /**
    * Return short version of Message toString'd, shorter than TextFormat#shortDebugString. Tries to
    * NOT print out data both because it can be big but also so we do not have data in our logs. Use
-   * judiciously. n * @return toString of passed <code>m</code>
+   * judiciously.
+   * @return toString of passed <code>m</code>
    */
   public static String getShortTextFormat(Message m) {
     if (m == null) return "null";
@@ -2188,8 +2190,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer CellVisibility to a client CellVisibility n * @return the converted
-   * client CellVisibility
+   * Convert a protocol buffer CellVisibility to a client CellVisibility
+   * @return the converted client CellVisibility
    */
   public static CellVisibility toCellVisibility(ClientProtos.CellVisibility proto) {
     if (proto == null) return null;
@@ -2197,8 +2199,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer CellVisibility bytes to a client CellVisibility n * @return the
-   * converted client CellVisibility n
+   * Convert a protocol buffer CellVisibility bytes to a client CellVisibility
+   * @return the converted client CellVisibility
    */
   public static CellVisibility toCellVisibility(byte[] protoBytes) throws DeserializationException {
     if (protoBytes == null) return null;
@@ -2214,8 +2216,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Create a protocol buffer CellVisibility based on a client CellVisibility. n * @return a
-   * protocol buffer CellVisibility
+   * Create a protocol buffer CellVisibility based on a client CellVisibility.
+   * @return a protocol buffer CellVisibility
    */
   public static ClientProtos.CellVisibility toCellVisibility(CellVisibility cellVisibility) {
     ClientProtos.CellVisibility.Builder builder = ClientProtos.CellVisibility.newBuilder();
@@ -2224,8 +2226,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer Authorizations to a client Authorizations n * @return the converted
-   * client Authorizations
+   * Convert a protocol buffer Authorizations to a client Authorizations
+   * @return the converted client Authorizations
    */
   public static Authorizations toAuthorizations(ClientProtos.Authorizations proto) {
     if (proto == null) return null;
@@ -2233,8 +2235,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer Authorizations bytes to a client Authorizations n * @return the
-   * converted client Authorizations n
+   * Convert a protocol buffer Authorizations bytes to a client Authorizations
+   * @return the converted client Authorizations
    */
   public static Authorizations toAuthorizations(byte[] protoBytes) throws DeserializationException {
     if (protoBytes == null) return null;
@@ -2250,8 +2252,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Create a protocol buffer Authorizations based on a client Authorizations. n * @return a
-   * protocol buffer Authorizations
+   * Create a protocol buffer Authorizations based on a client Authorizations.
+   * @return a protocol buffer Authorizations
    */
   public static ClientProtos.Authorizations toAuthorizations(Authorizations authorizations) {
     ClientProtos.Authorizations.Builder builder = ClientProtos.Authorizations.newBuilder();
@@ -2262,8 +2264,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer TimeUnit to a client TimeUnit n * @return the converted client
-   * TimeUnit
+   * Convert a protocol buffer TimeUnit to a client TimeUnit
+   * @return the converted client TimeUnit
    */
   public static TimeUnit toTimeUnit(final HBaseProtos.TimeUnit proto) {
     switch (proto) {
@@ -2286,8 +2288,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a client TimeUnit to a protocol buffer TimeUnit n * @return the converted protocol
-   * buffer TimeUnit
+   * Convert a client TimeUnit to a protocol buffer TimeUnit
+   * @return the converted protocol buffer TimeUnit
    */
   public static HBaseProtos.TimeUnit toProtoTimeUnit(final TimeUnit timeUnit) {
     switch (timeUnit) {
@@ -2310,8 +2312,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer ThrottleType to a client ThrottleType n * @return the converted
-   * client ThrottleType
+   * Convert a protocol buffer ThrottleType to a client ThrottleType
+   * @return the converted client ThrottleType
    */
   public static ThrottleType toThrottleType(final QuotaProtos.ThrottleType proto) {
     switch (proto) {
@@ -2339,8 +2341,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a client ThrottleType to a protocol buffer ThrottleType n * @return the converted
-   * protocol buffer ThrottleType
+   * Convert a client ThrottleType to a protocol buffer ThrottleType
+   * @return the converted protocol buffer ThrottleType
    */
   public static QuotaProtos.ThrottleType toProtoThrottleType(final ThrottleType type) {
     switch (type) {
@@ -2368,8 +2370,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer QuotaScope to a client QuotaScope n * @return the converted client
-   * QuotaScope
+   * Convert a protocol buffer QuotaScope to a client QuotaScope
+   * @return the converted client QuotaScope
    */
   public static QuotaScope toQuotaScope(final QuotaProtos.QuotaScope proto) {
     switch (proto) {
@@ -2382,8 +2384,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a client QuotaScope to a protocol buffer QuotaScope n * @return the converted protocol
-   * buffer QuotaScope
+   * Convert a client QuotaScope to a protocol buffer QuotaScope
+   * @return the converted protocol buffer QuotaScope
    */
   public static QuotaProtos.QuotaScope toProtoQuotaScope(final QuotaScope scope) {
     switch (scope) {
@@ -2396,8 +2398,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a protocol buffer QuotaType to a client QuotaType n * @return the converted client
-   * QuotaType
+   * Convert a protocol buffer QuotaType to a client QuotaType
+   * @return the converted client QuotaType
    */
   public static QuotaType toQuotaScope(final QuotaProtos.QuotaType proto) {
     switch (proto) {
@@ -2410,8 +2412,8 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Convert a client QuotaType to a protocol buffer QuotaType n * @return the converted protocol
-   * buffer QuotaType
+   * Convert a client QuotaType to a protocol buffer QuotaType
+   * @return the converted protocol buffer QuotaType
    */
   public static QuotaProtos.QuotaType toProtoQuotaScope(final QuotaType type) {
     switch (type) {
@@ -2538,7 +2540,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeDelimitedFrom avoid the hard-coded 64MB limit for decoding
    * buffers
    * @param builder current message builder
-   * @param in      Inputsream with delimited protobuf data n
+   * @param in      Inputsream with delimited protobuf data
    */
   public static void mergeDelimitedFrom(Message.Builder builder, InputStream in)
     throws IOException {
@@ -2560,7 +2562,7 @@ public final class ProtobufUtil {
    * where the message size is known
    * @param builder current message builder
    * @param in      InputStream containing protobuf data
-   * @param size    known size of protobuf data n
+   * @param size    known size of protobuf data
    */
   public static void mergeFrom(Message.Builder builder, InputStream in, int size)
     throws IOException {
@@ -2574,7 +2576,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeFrom avoids the hard-coded 64MB limit for decoding buffers
    * where the message size is not known
    * @param builder current message builder
-   * @param in      InputStream containing protobuf data n
+   * @param in      InputStream containing protobuf data
    */
   public static void mergeFrom(Message.Builder builder, InputStream in) throws IOException {
     final CodedInputStream codedInput = CodedInputStream.newInstance(in);
@@ -2587,7 +2589,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeFrom avoids the hard-coded 64MB limit for decoding buffers when
    * working with ByteStrings
    * @param builder current message builder
-   * @param bs      ByteString containing the n
+   * @param bs      ByteString containing the
    */
   public static void mergeFrom(Message.Builder builder, ByteString bs) throws IOException {
     final CodedInputStream codedInput = bs.newCodedInput();
@@ -2600,7 +2602,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeFrom avoids the hard-coded 64MB limit for decoding buffers when
    * working with byte arrays
    * @param builder current message builder
-   * @param b       byte array n
+   * @param b       byte array
    */
   public static void mergeFrom(Message.Builder builder, byte[] b) throws IOException {
     final CodedInputStream codedInput = CodedInputStream.newInstance(b);
@@ -2613,7 +2615,7 @@ public final class ProtobufUtil {
    * This version of protobuf's mergeFrom avoids the hard-coded 64MB limit for decoding buffers when
    * working with byte arrays
    * @param builder current message builder
-   * @param b       byte array nnn
+   * @param b       byte array
    */
   public static void mergeFrom(Message.Builder builder, byte[] b, int offset, int length)
     throws IOException {
@@ -2782,7 +2784,7 @@ public final class ProtobufUtil {
 
   /**
    * Creates {@link CompactionState} from {@link GetRegionInfoResponse.CompactionState} state
-   * @param state the protobuf CompactionState n
+   * @param state the protobuf CompactionState
    */
   public static CompactionState createCompactionState(GetRegionInfoResponse.CompactionState state) {
     return CompactionState.valueOf(state.toString());
@@ -2794,7 +2796,7 @@ public final class ProtobufUtil {
 
   /**
    * Creates {@link CompactionState} from {@link RegionLoad.CompactionState} state
-   * @param state the protobuf CompactionState n
+   * @param state the protobuf CompactionState
    */
   public static CompactionState
     createCompactionStateForRegionLoad(RegionLoad.CompactionState state) {
@@ -2899,9 +2901,7 @@ public final class ProtobufUtil {
       stats.getCompactionPressure());
   }
 
-  /**
-   * n * @return A String version of the passed in <code>msg</code>
-   */
+  /** Returns A String version of the passed in <code>msg</code> */
   public static String toText(Message msg) {
     return TextFormat.shortDebugString(msg);
   }
@@ -2911,7 +2911,7 @@ public final class ProtobufUtil {
   }
 
   /**
-   * Contain ServiceException inside here. Take a callable that is doing our pb rpc and run it. n
+   * Contain ServiceException inside here. Take a callable that is doing our pb rpc and run it.
    */
   public static <T> T call(Callable<T> callable) throws IOException {
     try {
@@ -3022,7 +3022,7 @@ public final class ProtobufUtil {
    *             magic and that is then followed by a protobuf that has a serialized
    *             {@link ServerName} in it.
    * @return Returns null if <code>data</code> is null else converts passed data to a ServerName
-   *         instance. n
+   *         instance.
    */
   public static ServerName parseServerNameFrom(final byte[] data) throws DeserializationException {
     if (data == null || data.length <= 0) return null;
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java
index 89d8acceae6..925f03436e4 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java
@@ -191,7 +191,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer MutateRequest for a client increment nnnnnn * @return a mutate request
+   * Create a protocol buffer MutateRequest for a client increment
+   * @return a mutate request
    */
   public static MutateRequest buildIncrementRequest(final byte[] regionName, final byte[] row,
     final byte[] family, final byte[] qualifier, final long amount, final Durability durability,
@@ -225,7 +226,7 @@ public final class RequestConverter {
 
   /**
    * Create a protocol buffer MutateRequest for a conditioned put/delete/increment/append
-   * @return a mutate request n
+   * @return a mutate request
    */
   public static MutateRequest buildMutateRequest(final byte[] regionName, final byte[] row,
     final byte[] family, final byte[] qualifier, final CompareOperator op, final byte[] value,
@@ -245,7 +246,7 @@ public final class RequestConverter {
 
   /**
    * Create a protocol buffer MultiRequest for conditioned row mutations
-   * @return a multi request n
+   * @return a multi request
    */
   public static ClientProtos.MultiRequest buildMultiRequest(final byte[] regionName,
     final byte[] row, final byte[] family, final byte[] qualifier, final CompareOperator op,
@@ -302,7 +303,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer MutateRequest for a put nn * @return a mutate request n
+   * Create a protocol buffer MutateRequest for a put
+   * @return a mutate request
    */
   public static MutateRequest buildMutateRequest(final byte[] regionName, final Put put)
     throws IOException {
@@ -314,7 +316,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer MutateRequest for an append nn * @return a mutate request n
+   * Create a protocol buffer MutateRequest for an append
+   * @return a mutate request
    */
   public static MutateRequest buildMutateRequest(final byte[] regionName, final Append append,
     long nonceGroup, long nonce) throws IOException {
@@ -330,7 +333,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer MutateRequest for a client increment nn * @return a mutate request
+   * Create a protocol buffer MutateRequest for a client increment
+   * @return a mutate request
    */
   public static MutateRequest buildMutateRequest(final byte[] regionName, final Increment increment,
     final long nonceGroup, final long nonce) throws IOException {
@@ -346,7 +350,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer MutateRequest for a delete nn * @return a mutate request n
+   * Create a protocol buffer MutateRequest for a delete
+   * @return a mutate request
    */
   public static MutateRequest buildMutateRequest(final byte[] regionName, final Delete delete)
     throws IOException {
@@ -366,7 +371,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer ScanRequest for a client Scan nnnn * @return a scan request n
+   * Create a protocol buffer ScanRequest for a client Scan
+   * @return a scan request
    */
   public static ScanRequest buildScanRequest(byte[] regionName, Scan scan, int numberOfRows,
     boolean closeScanner) throws IOException {
@@ -386,7 +392,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer ScanRequest for a scanner id nnn * @return a scan request
+   * Create a protocol buffer ScanRequest for a scanner id
+   * @return a scan request
    */
   public static ScanRequest buildScanRequest(long scannerId, int numberOfRows, boolean closeScanner,
     boolean trackMetrics) {
@@ -401,7 +408,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer ScanRequest for a scanner id nnnn * @return a scan request
+   * Create a protocol buffer ScanRequest for a scanner id
+   * @return a scan request
    */
   public static ScanRequest buildScanRequest(long scannerId, int numberOfRows, boolean closeScanner,
     long nextCallSeq, boolean trackMetrics, boolean renew, int limitOfRows) {
@@ -421,7 +429,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer bulk load request nnnnn * @return a bulk load request
+   * Create a protocol buffer bulk load request
+   * @return a bulk load request
    */
   public static BulkLoadHFileRequest buildBulkLoadHFileRequest(
     final List<Pair<byte[], String>> familyPaths, final byte[] regionName, boolean assignSeqNum,
@@ -431,7 +440,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer bulk load request nnnnnn * @return a bulk load request
+   * Create a protocol buffer bulk load request
+   * @return a bulk load request
    */
   public static BulkLoadHFileRequest buildBulkLoadHFileRequest(
     final List<Pair<byte[], String>> familyPaths, final byte[] regionName, boolean assignSeqNum,
@@ -488,7 +498,7 @@ public final class RequestConverter {
    * @param mutationBuilder     mutationBuilder to be used to build mutation.
    * @param nonceGroup          nonceGroup to be applied.
    * @param indexMap            Map of created RegionAction to the original index for a
-   *                            RowMutations/CheckAndMutate within the original list of actions n
+   *                            RowMutations/CheckAndMutate within the original list of actions
    */
   public static void buildRegionActions(final byte[] regionName, final List<Action> actions,
     final MultiRequest.Builder multiRequestBuilder, final RegionAction.Builder regionActionBuilder,
@@ -651,7 +661,7 @@ public final class RequestConverter {
    * @param mutationBuilder     mutationBuilder to be used to build mutation.
    * @param nonceGroup          nonceGroup to be applied.
    * @param indexMap            Map of created RegionAction to the original index for a
-   *                            RowMutations/CheckAndMutate within the original list of actions n
+   *                            RowMutations/CheckAndMutate within the original list of actions
    */
   public static void buildNoDataRegionActions(final byte[] regionName,
     final Iterable<Action> actions, final List<CellScannable> cells,
@@ -1018,7 +1028,8 @@ public final class RequestConverter {
   /**
    * Create a CompactRegionRequest for a given region name
    * @param regionName the name of the region to get info
-   * @param major      indicator if it is a major compaction n * @return a CompactRegionRequest
+   * @param major      indicator if it is a major compaction
+   * @return a CompactRegionRequest
    */
   public static CompactRegionRequest buildCompactRegionRequest(byte[] regionName, boolean major,
     byte[] columnFamily) {
@@ -1076,7 +1087,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer AddColumnRequest nn * @return an AddColumnRequest
+   * Create a protocol buffer AddColumnRequest
+   * @return an AddColumnRequest
    */
   public static AddColumnRequest buildAddColumnRequest(final TableName tableName,
     final ColumnFamilyDescriptor column, final long nonceGroup, final long nonce) {
@@ -1089,7 +1101,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer DeleteColumnRequest nn * @return a DeleteColumnRequest
+   * Create a protocol buffer DeleteColumnRequest
+   * @return a DeleteColumnRequest
    */
   public static DeleteColumnRequest buildDeleteColumnRequest(final TableName tableName,
     final byte[] columnName, final long nonceGroup, final long nonce) {
@@ -1102,7 +1115,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer ModifyColumnRequest nn * @return an ModifyColumnRequest
+   * Create a protocol buffer ModifyColumnRequest
+   * @return an ModifyColumnRequest
    */
   public static ModifyColumnRequest buildModifyColumnRequest(final TableName tableName,
     final ColumnFamilyDescriptor column, final long nonceGroup, final long nonce) {
@@ -1115,7 +1129,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer MoveRegionRequest nn * @return A MoveRegionRequest
+   * Create a protocol buffer MoveRegionRequest
+   * @return A MoveRegionRequest
    */
   public static MoveRegionRequest buildMoveRegionRequest(byte[] encodedRegionName,
     ServerName destServerName) {
@@ -1156,7 +1171,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Create a protocol buffer AssignRegionRequest n * @return an AssignRegionRequest
+   * Create a protocol buffer AssignRegionRequest
+   * @return an AssignRegionRequest
    */
   public static AssignRegionRequest buildAssignRegionRequest(final byte[] regionName) {
     AssignRegionRequest.Builder builder = AssignRegionRequest.newBuilder();
@@ -1165,7 +1181,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer UnassignRegionRequest n * @return an UnassignRegionRequest
+   * Creates a protocol buffer UnassignRegionRequest
+   * @return an UnassignRegionRequest
    */
   public static UnassignRegionRequest buildUnassignRegionRequest(final byte[] regionName) {
     UnassignRegionRequest.Builder builder = UnassignRegionRequest.newBuilder();
@@ -1174,7 +1191,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer OfflineRegionRequest n * @return an OfflineRegionRequest
+   * Creates a protocol buffer OfflineRegionRequest
+   * @return an OfflineRegionRequest
    */
   public static OfflineRegionRequest buildOfflineRegionRequest(final byte[] regionName) {
     OfflineRegionRequest.Builder builder = OfflineRegionRequest.newBuilder();
@@ -1183,7 +1201,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer DeleteTableRequest n * @return a DeleteTableRequest
+   * Creates a protocol buffer DeleteTableRequest
+   * @return a DeleteTableRequest
    */
   public static DeleteTableRequest buildDeleteTableRequest(final TableName tableName,
     final long nonceGroup, final long nonce) {
@@ -1211,7 +1230,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer EnableTableRequest n * @return an EnableTableRequest
+   * Creates a protocol buffer EnableTableRequest
+   * @return an EnableTableRequest
    */
   public static EnableTableRequest buildEnableTableRequest(final TableName tableName,
     final long nonceGroup, final long nonce) {
@@ -1223,7 +1243,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer DisableTableRequest n * @return a DisableTableRequest
+   * Creates a protocol buffer DisableTableRequest
+   * @return a DisableTableRequest
    */
   public static DisableTableRequest buildDisableTableRequest(final TableName tableName,
     final long nonceGroup, final long nonce) {
@@ -1235,7 +1256,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer CreateTableRequest nn * @return a CreateTableRequest
+   * Creates a protocol buffer CreateTableRequest
+   * @return a CreateTableRequest
    */
   public static CreateTableRequest buildCreateTableRequest(final TableDescriptor tableDescriptor,
     final byte[][] splitKeys, final long nonceGroup, final long nonce) {
@@ -1252,7 +1274,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer ModifyTableRequest nn * @return a ModifyTableRequest
+   * Creates a protocol buffer ModifyTableRequest
+   * @return a ModifyTableRequest
    */
   public static ModifyTableRequest buildModifyTableRequest(final TableName tableName,
     final TableDescriptor tableDesc, final long nonceGroup, final long nonce) {
@@ -1265,7 +1288,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer GetSchemaAlterStatusRequest n * @return a GetSchemaAlterStatusRequest
+   * Creates a protocol buffer GetSchemaAlterStatusRequest
+   * @return a GetSchemaAlterStatusRequest
    */
   public static GetSchemaAlterStatusRequest
     buildGetSchemaAlterStatusRequest(final TableName tableName) {
@@ -1275,7 +1299,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer GetTableDescriptorsRequest n * @return a GetTableDescriptorsRequest
+   * Creates a protocol buffer GetTableDescriptorsRequest
+   * @return a GetTableDescriptorsRequest
    */
   public static GetTableDescriptorsRequest
     buildGetTableDescriptorsRequest(final List<TableName> tableNames) {
@@ -1390,7 +1415,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer SetBalancerRunningRequest nn * @return a SetBalancerRunningRequest
+   * Creates a protocol buffer SetBalancerRunningRequest
+   * @return a SetBalancerRunningRequest
    */
   public static SetBalancerRunningRequest buildSetBalancerRunningRequest(boolean on,
     boolean synchronous) {
@@ -1475,8 +1501,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a request for querying the master the last flushed sequence Id for a region n * @return
-   * A {@link GetLastFlushedSequenceIdRequest}
+   * Creates a request for querying the master the last flushed sequence Id for a region
+   * @return A {@link GetLastFlushedSequenceIdRequest}
    */
   public static GetLastFlushedSequenceIdRequest
     buildGetLastFlushedSequenceIdRequest(byte[] regionName) {
@@ -1527,7 +1553,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer SetNormalizerRunningRequest n * @return a SetNormalizerRunningRequest
+   * Creates a protocol buffer SetNormalizerRunningRequest
+   * @return a SetNormalizerRunningRequest
    */
   public static SetNormalizerRunningRequest buildSetNormalizerRunningRequest(boolean on) {
     return SetNormalizerRunningRequest.newBuilder().setOn(on).build();
@@ -1635,7 +1662,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer CreateNamespaceRequest n * @return a CreateNamespaceRequest
+   * Creates a protocol buffer CreateNamespaceRequest
+   * @return a CreateNamespaceRequest
    */
   public static CreateNamespaceRequest
     buildCreateNamespaceRequest(final NamespaceDescriptor descriptor) {
@@ -1645,7 +1673,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer ModifyNamespaceRequest n * @return a ModifyNamespaceRequest
+   * Creates a protocol buffer ModifyNamespaceRequest
+   * @return a ModifyNamespaceRequest
    */
   public static ModifyNamespaceRequest
     buildModifyNamespaceRequest(final NamespaceDescriptor descriptor) {
@@ -1655,7 +1684,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer DeleteNamespaceRequest n * @return a DeleteNamespaceRequest
+   * Creates a protocol buffer DeleteNamespaceRequest
+   * @return a DeleteNamespaceRequest
    */
   public static DeleteNamespaceRequest buildDeleteNamespaceRequest(final String name) {
     DeleteNamespaceRequest.Builder builder = DeleteNamespaceRequest.newBuilder();
@@ -1664,8 +1694,8 @@ public final class RequestConverter {
   }
 
   /**
-   * Creates a protocol buffer GetNamespaceDescriptorRequest n * @return a
-   * GetNamespaceDescriptorRequest
+   * Creates a protocol buffer GetNamespaceDescriptorRequest
+   * @return a GetNamespaceDescriptorRequest
    */
   public static GetNamespaceDescriptorRequest
     buildGetNamespaceDescriptorRequest(final String name) {
@@ -1782,7 +1812,7 @@ public final class RequestConverter {
 
   /**
    * Creates IsSnapshotCleanupEnabledRequest to determine if auto snapshot cleanup based on TTL
-   * expiration is turned on n
+   * expiration is turned on
    */
   public static IsSnapshotCleanupEnabledRequest buildIsSnapshotCleanupEnabledRequest() {
     return IsSnapshotCleanupEnabledRequest.newBuilder().build();
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ResponseConverter.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ResponseConverter.java
index 0a81db1cfb8..180698864fd 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ResponseConverter.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ResponseConverter.java
@@ -90,7 +90,7 @@ public final class ResponseConverter {
    * @param request  the original protocol buffer MultiRequest
    * @param response the protocol buffer MultiResponse to convert
    * @param cells    Cells to go with the passed in <code>proto</code>. Can be null.
-   * @return the results that were in the MultiResponse (a Result or an Exception). n
+   * @return the results that were in the MultiResponse (a Result or an Exception).
    */
   public static org.apache.hadoop.hbase.client.MultiResponse getResults(final MultiRequest request,
     final MultiResponse response, final CellScanner cells) throws IOException {
@@ -103,7 +103,7 @@ public final class ResponseConverter {
    * @param indexMap Used to support RowMutations/CheckAndMutate in batch
    * @param response the protocol buffer MultiResponse to convert
    * @param cells    Cells to go with the passed in <code>proto</code>. Can be null.
-   * @return the results that were in the MultiResponse (a Result or an Exception). n
+   * @return the results that were in the MultiResponse (a Result or an Exception).
    */
   public static org.apache.hadoop.hbase.client.MultiResponse getResults(final MultiRequest request,
     final Map<Integer, Integer> indexMap, final MultiResponse response, final CellScanner cells)
@@ -265,7 +265,8 @@ public final class ResponseConverter {
   }
 
   /**
-   * Wrap a throwable to an action result. n * @return an action result builder
+   * Wrap a throwable to an action result.
+   * @return an action result builder
    */
   public static ResultOrException.Builder buildActionResult(final Throwable t) {
     ResultOrException.Builder builder = ResultOrException.newBuilder();
@@ -274,7 +275,8 @@ public final class ResponseConverter {
   }
 
   /**
-   * Wrap a throwable to an action result. n * @return an action result builder
+   * Wrap a throwable to an action result.
+   * @return an action result builder
    */
   public static ResultOrException.Builder buildActionResult(final ClientProtos.Result r) {
     ResultOrException.Builder builder = ResultOrException.newBuilder();
@@ -282,9 +284,7 @@ public final class ResponseConverter {
     return builder;
   }
 
-  /**
-   * n * @return NameValuePair of the exception name to stringified version os exception.
-   */
+  /** Returns NameValuePair of the exception name to stringified version os exception. */
   public static NameBytesPair buildException(final Throwable t) {
     NameBytesPair.Builder parameterBuilder = NameBytesPair.newBuilder();
     parameterBuilder.setName(t.getClass().getName());
@@ -325,7 +325,8 @@ public final class ResponseConverter {
   }
 
   /**
-   * A utility to build a GetServerInfoResponse. nn * @return the response
+   * A utility to build a GetServerInfoResponse.
+   * @return the response
    */
   public static GetServerInfoResponse buildGetServerInfoResponse(final ServerName serverName,
     final int webuiPort) {
@@ -340,7 +341,8 @@ public final class ResponseConverter {
   }
 
   /**
-   * A utility to build a GetOnlineRegionResponse. n * @return the response
+   * A utility to build a GetOnlineRegionResponse.
+   * @return the response
    */
   public static GetOnlineRegionResponse
     buildGetOnlineRegionResponse(final List<RegionInfo> regions) {
@@ -424,7 +426,7 @@ public final class ResponseConverter {
   }
 
   /**
-   * Create Results from the cells using the cells meta data. nnn
+   * Create Results from the cells using the cells meta data.
    */
   public static Result[] getResults(CellScanner cellScanner, ScanResponse response)
     throws IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/util/Writables.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/util/Writables.java
index 7ebbbf44ceb..9a964666e1d 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/util/Writables.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/util/Writables.java
@@ -90,7 +90,7 @@ public class Writables {
    * @return The passed Writable after its readFields has been called fed by the passed
    *         <code>bytes</code> array or IllegalArgumentException if passed null or an empty
    *         <code>bytes</code> array.
-   * @throws IOException e n
+   * @throws IOException e
    */
   public static Writable getWritable(final byte[] bytes, final Writable w) throws IOException {
     return getWritable(bytes, 0, bytes.length, w);
@@ -106,7 +106,7 @@ public class Writables {
    * @return The passed Writable after its readFields has been called fed by the passed
    *         <code>bytes</code> array or IllegalArgumentException if passed null or an empty
    *         <code>bytes</code> array.
-   * @throws IOException e n
+   * @throws IOException e
    */
   public static Writable getWritable(final byte[] bytes, final int offset, final int length,
     final Writable w) throws IOException {
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZNodePaths.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZNodePaths.java
index c476935a950..f7b9830c6f6 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZNodePaths.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/zookeeper/ZNodePaths.java
@@ -147,7 +147,7 @@ public class ZNodePaths {
 
   /**
    * Parses the meta replicaId from the passed path.
-   * @param path the name of the full path which includes baseZNode. n
+   * @param path the name of the full path which includes baseZNode.
    */
   public int getMetaReplicaIdFromPath(String path) {
     // Extract the znode from path. The prefix is of the following format.
@@ -158,7 +158,7 @@ public class ZNodePaths {
 
   /**
    * Parse the meta replicaId from the passed znode
-   * @param znode the name of the znode, does not include baseZNode n
+   * @param znode the name of the znode, does not include baseZNode
    */
   public int getMetaReplicaIdFromZNode(String znode) {
     return znode.equals(metaZNodePrefix)
diff --git a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientNoCluster.java b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientNoCluster.java
index a3c9a2c429a..3b91708af6a 100644
--- a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientNoCluster.java
+++ b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestClientNoCluster.java
@@ -30,6 +30,7 @@ import java.util.Random;
 import java.util.SortedMap;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentSkipListMap;
+import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -148,7 +149,7 @@ public class TestClientNoCluster extends Configured implements Tool {
   }
 
   /**
-   * Remove the @Ignore to try out timeout and retry asettings n
+   * Remove the @Ignore to try out timeout and retry asettings
    */
   @Ignore
   @Test
@@ -179,7 +180,7 @@ public class TestClientNoCluster extends Configured implements Tool {
   }
 
   /**
-   * Test that operation timeout prevails over rpc default timeout and retries, etc. n
+   * Test that operation timeout prevails over rpc default timeout and retries, etc.
    */
   @Test
   public void testRpcTimeout() throws IOException {
@@ -560,8 +561,8 @@ public class TestClientNoCluster extends Configured implements Tool {
   }
 
   /**
-   * @param name region name or encoded region name. n * @return True if we are dealing with a
-   *             hbase:meta region.
+   * @param name region name or encoded region name.
+   * @return True if we are dealing with a hbase:meta region.
    */
   static boolean isMetaRegion(final byte[] name, final RegionSpecifierType type) {
     switch (type) {
@@ -616,8 +617,9 @@ public class TestClientNoCluster extends Configured implements Tool {
 
   /**
    * Format passed integer. Zero-pad. Copied from hbase-server PE class and small amendment. Make
-   * them share. n * @return Returns zero-prefixed 10-byte wide decimal version of passed number
-   * (Does absolute in case number is negative).
+   * them share.
+   * @return Returns zero-prefixed 10-byte wide decimal version of passed number (Does absolute in
+   *         case number is negative).
    */
   private static byte[] format(final long number) {
     byte[] b = new byte[10];
@@ -629,9 +631,7 @@ public class TestClientNoCluster extends Configured implements Tool {
     return b;
   }
 
-  /**
-   * nn * @return <code>count</code> regions
-   */
+  /** Returns <code>count</code> regions */
   private static HRegionInfo[] makeHRegionInfos(final byte[] tableName, final int count,
     final long namespaceSpan) {
     byte[] startKey = HConstants.EMPTY_BYTE_ARRAY;
@@ -651,9 +651,7 @@ public class TestClientNoCluster extends Configured implements Tool {
     return hris;
   }
 
-  /**
-   * n * @return Return <code>count</code> servernames.
-   */
+  /** Returns Return <code>count</code> servernames. */
   private static ServerName[] makeServerNames(final int count) {
     ServerName[] sns = new ServerName[count];
     for (int i = 0; i < count; i++) {
@@ -696,7 +694,7 @@ public class TestClientNoCluster extends Configured implements Tool {
   }
 
   /**
-   * Code for each 'client' to run. nnnn
+   * Code for each 'client' to run.
    */
   static void cycle(int id, final Configuration c, final Connection sharedConnection)
     throws IOException {
@@ -819,7 +817,7 @@ public class TestClientNoCluster extends Configured implements Tool {
 
   /**
    * Run a client instance against a faked up server.
-   * @param args TODO n
+   * @param args TODO
    */
   public static void main(String[] args) throws Exception {
     System.exit(ToolRunner.run(HBaseConfiguration.create(), new TestClientNoCluster(), args));
diff --git a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestDeleteTimeStamp.java b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestDeleteTimeStamp.java
index cc329cd3d03..cce3ba4e4e3 100644
--- a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestDeleteTimeStamp.java
+++ b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestDeleteTimeStamp.java
@@ -42,7 +42,7 @@ public class TestDeleteTimeStamp {
   private static final byte[] QUALIFIER = Bytes.toBytes("testQualifier");
 
   /*
-   * Test for verifying that the timestamp in delete object is being honored. n
+   * Test for verifying that the timestamp in delete object is being honored.
    */
   @Test
   public void testTimeStamp() {
diff --git a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromAdmin.java b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromAdmin.java
index 1dfd8f2d1d1..3a87c56af56 100644
--- a/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromAdmin.java
+++ b/hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromAdmin.java
@@ -61,7 +61,7 @@ public class TestSnapshotFromAdmin {
 
   /**
    * Test that the logic for doing 'correct' back-off based on exponential increase and the max-time
-   * passed from the server ensures the correct overall waiting for the snapshot to finish. n
+   * passed from the server ensures the correct overall waiting for the snapshot to finish.
    */
   @Test
   public void testBackoffLogic() throws Exception {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/AuthUtil.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/AuthUtil.java
index 707391ef173..a406437987e 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/AuthUtil.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/AuthUtil.java
@@ -95,7 +95,8 @@ public final class AuthUtil {
   /**
    * For kerberized cluster, return login user (from kinit or from keytab if specified). For
    * non-kerberized cluster, return system user.
-   * @param conf configuartion file n * @throws IOException login exception
+   * @param conf configuartion file
+   * @throws IOException login exception
    */
   @InterfaceAudience.Private
   public static User loginClient(Configuration conf) throws IOException {
@@ -155,7 +156,8 @@ public final class AuthUtil {
    * <p>
    * NOT recommend to use to method unless you're sure what you're doing, it is for canary only.
    * Please use User#loginClient.
-   * @param conf configuration file n * @throws IOException login exception
+   * @param conf configuration file
+   * @throws IOException login exception
    */
   private static User loginClientAsService(Configuration conf) throws IOException {
     UserProvider provider = UserProvider.instantiate(conf);
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/ByteBufferKeyOnlyKeyValue.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/ByteBufferKeyOnlyKeyValue.java
index e5050b864ca..a29a98a8c09 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/ByteBufferKeyOnlyKeyValue.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/ByteBufferKeyOnlyKeyValue.java
@@ -54,7 +54,7 @@ public class ByteBufferKeyOnlyKeyValue extends ByteBufferExtendedCell {
 
   /**
    * A setter that helps to avoid object creation every time and whenever there is a need to create
-   * new OffheapKeyOnlyKeyValue. nnn
+   * new OffheapKeyOnlyKeyValue.
    */
   public void setKey(ByteBuffer key, int offset, int length) {
     setKey(key, offset, length, ByteBufferUtils.toShort(key, offset));
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/CellBuilder.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/CellBuilder.java
index 28128ee37c6..677ed2295ce 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/CellBuilder.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/CellBuilder.java
@@ -48,7 +48,7 @@ public interface CellBuilder {
   Cell build();
 
   /**
-   * Remove all internal elements from builder. n
+   * Remove all internal elements from builder.
    */
   CellBuilder clear();
 }
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/CellComparatorImpl.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/CellComparatorImpl.java
index 5992b8b404b..426cf7c9395 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/CellComparatorImpl.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/CellComparatorImpl.java
@@ -663,9 +663,8 @@ public class CellComparatorImpl implements CellComparator {
   /**
    * Compares the row part of the cell with a simple plain byte[] like the stopRow in Scan. This
    * should be used with context where for hbase:meta cells the
-   * {{@link MetaCellComparator#META_COMPARATOR} should be used n * the cell to be compared n * the
-   * kv serialized byte[] to be compared with n * the offset in the byte[] n * the length in the
-   * byte[]
+   * {{@link MetaCellComparator#META_COMPARATOR} should be used the cell to be compared the kv
+   * serialized byte[] to be compared with the offset in the byte[] the length in the byte[]
    * @return 0 if both cell and the byte[] are equal, 1 if the cell is bigger than byte[], -1
    *         otherwise
    */
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java
index 604aa1dff0d..83e0c1c7fe7 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/CellUtil.java
@@ -138,7 +138,8 @@ public final class CellUtil {
   /**
    * Returns tag value in a new byte array. If server-side, use {@link Tag#getValueArray()} with
    * appropriate {@link Tag#getValueOffset()} and {@link Tag#getValueLength()} instead to save on
-   * allocations. n * @return tag value in a new byte array.
+   * allocations.
+   * @return tag value in a new byte array.
    * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
    */
   @Deprecated
@@ -151,7 +152,8 @@ public final class CellUtil {
   /**
    * Makes a column in family:qualifier form from separate byte arrays.
    * <p>
-   * Not recommended for usage as this is old-style API. nn * @return family:qualifier
+   * Not recommended for usage as this is old-style API.
+   * @return family:qualifier
    */
   public static byte[] makeColumn(byte[] family, byte[] qualifier) {
     return Bytes.add(family, COLUMN_FAMILY_DELIM_ARRAY, qualifier);
@@ -367,7 +369,8 @@ public final class CellUtil {
   }
 
   /**
-   * Copies the tags info into the tag portion of the cell nnn * @return position after tags
+   * Copies the tags info into the tag portion of the cell
+   * @return position after tags
    * @deprecated As of HBase-2.0. Will be removed in HBase-3.0.
    */
   @Deprecated
@@ -385,7 +388,8 @@ public final class CellUtil {
   }
 
   /**
-   * Copies the tags info into the tag portion of the cell nnn * @return position after tags
+   * Copies the tags info into the tag portion of the cell
+   * @return position after tags
    * @deprecated As of HBase-2.0. Will be removed in 3.0.
    */
   @Deprecated
@@ -427,7 +431,7 @@ public final class CellUtil {
   }
 
   /**
-   * n * @return cell's qualifier wrapped into a ByteBuffer.
+   * @return cell's qualifier wrapped into a ByteBuffer.
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0.
    */
   @Deprecated
@@ -509,8 +513,8 @@ public final class CellUtil {
   }
 
   /**
-   * Create a Cell with specific row. Other fields defaulted. n * @return Cell with passed row but
-   * all other fields are arbitrary
+   * Create a Cell with specific row. Other fields defaulted.
+   * @return Cell with passed row but all other fields are arbitrary
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use {@link CellBuilder}
    *             instead
    */
@@ -520,8 +524,8 @@ public final class CellUtil {
   }
 
   /**
-   * Create a Cell with specific row and value. Other fields are defaulted. nn * @return Cell with
-   * passed row and value but all other fields are arbitrary
+   * Create a Cell with specific row and value. Other fields are defaulted.
+   * @return Cell with passed row and value but all other fields are arbitrary
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use {@link CellBuilder}
    *             instead
    */
@@ -536,8 +540,8 @@ public final class CellUtil {
   }
 
   /**
-   * Create a Cell with specific row. Other fields defaulted. nnn * @return Cell with passed row but
-   * all other fields are arbitrary
+   * Create a Cell with specific row. Other fields defaulted.
+   * @return Cell with passed row but all other fields are arbitrary
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use {@link CellBuilder}
    *             instead
    */
@@ -580,9 +584,7 @@ public final class CellUtil {
     return PrivateCellUtil.createCell(cell, value, tags);
   }
 
-  /**
-   * n * @return CellScanner interface over <code>cellIterables</code>
-   */
+  /** Returns CellScanner interface over <code>cellIterables</code> */
   public static CellScanner
     createCellScanner(final List<? extends CellScannable> cellScannerables) {
     return new CellScanner() {
@@ -608,17 +610,15 @@ public final class CellUtil {
     };
   }
 
-  /**
-   * n * @return CellScanner interface over <code>cellIterable</code>
-   */
+  /** Returns CellScanner interface over <code>cellIterable</code> */
   public static CellScanner createCellScanner(final Iterable<Cell> cellIterable) {
     if (cellIterable == null) return null;
     return createCellScanner(cellIterable.iterator());
   }
 
   /**
-   * n * @return CellScanner interface over <code>cellIterable</code> or null if <code>cells</code>
-   * is null
+   * Returns CellScanner interface over <code>cellIterable</code> or null if <code>cells</code> is
+   * null
    */
   public static CellScanner createCellScanner(final Iterator<Cell> cells) {
     if (cells == null) return null;
@@ -640,9 +640,7 @@ public final class CellUtil {
     };
   }
 
-  /**
-   * n * @return CellScanner interface over <code>cellArray</code>
-   */
+  /** Returns CellScanner interface over <code>cellArray</code> */
   public static CellScanner createCellScanner(final Cell[] cellArray) {
     return new CellScanner() {
       private final Cell[] cells = cellArray;
@@ -698,7 +696,7 @@ public final class CellUtil {
   }
 
   /**
-   * nn * @return True if the rows in <code>left</code> and <code>right</code> Cells match
+   * @return True if the rows in <code>left</code> and <code>right</code> Cells match
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Instead use
    *             {@link #matchingRows(Cell, Cell)}
    */
@@ -818,8 +816,8 @@ public final class CellUtil {
   }
 
   /**
-   * Finds if the qualifier part of the cell and the KV serialized byte[] are equal n * @param buf
-   * the serialized keyvalue format byte[]
+   * Finds if the qualifier part of the cell and the KV serialized byte[] are equal
+   * @param buf the serialized keyvalue format byte[]
    * @return true if the qualifier matches, false otherwise
    */
   public static boolean matchingQualifier(final Cell left, final byte[] buf) {
@@ -830,8 +828,8 @@ public final class CellUtil {
   }
 
   /**
-   * Finds if the qualifier part of the cell and the KV serialized byte[] are equal n * @param buf
-   * the serialized keyvalue format byte[]
+   * Finds if the qualifier part of the cell and the KV serialized byte[] are equal
+   * @param buf    the serialized keyvalue format byte[]
    * @param offset the offset of the qualifier in the byte[]
    * @param length the length of the qualifier in the byte[]
    * @return true if the qualifier matches, false otherwise
@@ -983,8 +981,9 @@ public final class CellUtil {
   /**
    * Estimate based on keyvalue's serialization format in the RPC layer. Note that there is an extra
    * SIZEOF_INT added to the size here that indicates the actual length of the cell for cases where
-   * cell's are serialized in a contiguous format (For eg in RPCs). n * @return Estimate of the
-   * <code>cell</code> size in bytes plus an extra SIZEOF_INT indicating the actual cell length.
+   * cell's are serialized in a contiguous format (For eg in RPCs).
+   * @return Estimate of the <code>cell</code> size in bytes plus an extra SIZEOF_INT indicating the
+   *         actual cell length.
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0.
    */
   @Deprecated
@@ -1002,16 +1001,15 @@ public final class CellUtil {
   }
 
   /**
-   * n * @return Sum of the lengths of all the elements in a Cell; does not count in any
-   * infrastructure
+   * Returns Sum of the lengths of all the elements in a Cell; does not count in any infrastructure
    */
   private static int getSumOfCellElementLengths(final Cell cell) {
     return getSumOfCellKeyElementLengths(cell) + cell.getValueLength() + cell.getTagsLength();
   }
 
   /**
-   * n * @return Sum of all elements that make up a key; does not include infrastructure, tags or
-   * values.
+   * @return Sum of all elements that make up a key; does not include infrastructure, tags or
+   *         values.
    */
   private static int getSumOfCellKeyElementLengths(final Cell cell) {
     return cell.getRowLength() + cell.getFamilyLength() + cell.getQualifierLength()
@@ -1035,7 +1033,8 @@ public final class CellUtil {
    * This is an estimate of the heap space occupied by a cell. When the cell is of type
    * {@link HeapSize} we call {@link HeapSize#heapSize()} so cell can give a correct value. In other
    * cases we just consider the bytes occupied by the cell components ie. row, CF, qualifier,
-   * timestamp, type, value and tags. n * @return estimate of the heap space
+   * timestamp, type, value and tags.
+   * @return estimate of the heap space
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Use
    *             {@link RawCell#getTags()}
    */
@@ -1046,7 +1045,8 @@ public final class CellUtil {
 
   /********************* tags *************************************/
   /**
-   * Util method to iterate through the tags nnn * @return iterator for the tags
+   * Util method to iterate through the tags
+   * @return iterator for the tags
    * @deprecated As of 2.0.0 and will be removed in 3.0.0 Instead use
    *             {@link PrivateCellUtil#tagsIterator(Cell)}
    */
@@ -1125,8 +1125,8 @@ public final class CellUtil {
 
   /**
    * Sets the given seqId to the cell. Marked as audience Private as of 1.2.0. Setting a Cell
-   * sequenceid is an internal implementation detail not for general public use. nn * @throws
-   * IOException when the passed cell is not of type {@link ExtendedCell}
+   * sequenceid is an internal implementation detail not for general public use.
+   * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
    */
   @Deprecated
@@ -1135,8 +1135,8 @@ public final class CellUtil {
   }
 
   /**
-   * Sets the given timestamp to the cell. nn * @throws IOException when the passed cell is not of
-   * type {@link ExtendedCell}
+   * Sets the given timestamp to the cell.
+   * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    * @deprecated As of HBase-2.0. Will be a LimitedPrivate API in HBase-3.0.
    */
   @Deprecated
@@ -1145,7 +1145,8 @@ public final class CellUtil {
   }
 
   /**
-   * Sets the given timestamp to the cell. n * @param ts buffer containing the timestamp value
+   * Sets the given timestamp to the cell.
+   * @param ts       buffer containing the timestamp value
    * @param tsOffset offset to the new timestamp
    * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    * @deprecated As of HBase-2.0. Will be a LimitedPrivate API in HBase-3.0.
@@ -1157,7 +1158,8 @@ public final class CellUtil {
 
   /**
    * Sets the given timestamp to the cell iff current timestamp is
-   * {@link HConstants#LATEST_TIMESTAMP}. nn * @return True if cell timestamp is modified.
+   * {@link HConstants#LATEST_TIMESTAMP}.
+   * @return True if cell timestamp is modified.
    * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
    */
@@ -1168,7 +1170,8 @@ public final class CellUtil {
 
   /**
    * Sets the given timestamp to the cell iff current timestamp is
-   * {@link HConstants#LATEST_TIMESTAMP}. n * @param ts buffer containing the timestamp value
+   * {@link HConstants#LATEST_TIMESTAMP}.
+   * @param ts       buffer containing the timestamp value
    * @param tsOffset offset to the new timestamp
    * @return True if cell timestamp is modified.
    * @throws IOException when the passed cell is not of type {@link ExtendedCell}
@@ -1182,8 +1185,8 @@ public final class CellUtil {
   /**
    * Writes the Cell's key part as it would have serialized in a KeyValue. The format is &lt;2 bytes
    * rk len&gt;&lt;rk&gt;&lt;1 byte cf len&gt;&lt;cf&gt;&lt;qualifier&gt;&lt;8 bytes
-   * timestamp&gt;&lt;1 byte type&gt; nn * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
-   * n
+   * timestamp&gt;&lt;1 byte type&gt;
+   * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
    */
   @Deprecated
   public static void writeFlatKey(Cell cell, DataOutputStream out) throws IOException {
@@ -1219,7 +1222,8 @@ public final class CellUtil {
    * Writes the row from the given cell to the output stream excluding the common prefix
    * @param out     The dataoutputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param rlength the row length n * @deprecated As of 2.0. Will be removed in hbase-3.0
+   * @param rlength the row length
+   * @deprecated As of 2.0. Will be removed in hbase-3.0
    */
   @Deprecated
   public static void writeRowSkippingBytes(DataOutputStream out, Cell cell, short rlength,
@@ -1233,9 +1237,7 @@ public final class CellUtil {
     }
   }
 
-  /**
-   * n * @return The Key portion of the passed <code>cell</code> as a String.
-   */
+  /** Returns The Key portion of the passed <code>cell</code> as a String. */
   public static String getCellKeyAsString(Cell cell) {
     return getCellKeyAsString(cell,
       c -> Bytes.toStringBinary(c.getRowArray(), c.getRowOffset(), c.getRowLength()));
@@ -1275,9 +1277,9 @@ public final class CellUtil {
   /**
    * This method exists just to encapsulate how we serialize keys. To be replaced by a factory that
    * we query to figure what the Cell implementation is and then, what serialization engine to use
-   * and further, how to serialize the key for inclusion in hfile index. TODO. n * @return The key
-   * portion of the Cell serialized in the old-school KeyValue way or null if passed a null
-   * <code>cell</code>
+   * and further, how to serialize the key for inclusion in hfile index. TODO.
+   * @return The key portion of the Cell serialized in the old-school KeyValue way or null if passed
+   *         a null <code>cell</code>
    * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
    */
   @Deprecated
@@ -1289,8 +1291,8 @@ public final class CellUtil {
   }
 
   /**
-   * Write rowkey excluding the common part. nnnnn * @deprecated As of HBase-2.0. Will be removed in
-   * HBase-3.0
+   * Write rowkey excluding the common part.
+   * @deprecated As of HBase-2.0. Will be removed in HBase-3.0
    */
   @Deprecated
   public static void writeRowKeyExcludingCommon(Cell cell, short rLen, int commonPrefix,
@@ -1494,7 +1496,8 @@ public final class CellUtil {
   }
 
   /**
-   * Compares the row of two keyvalues for equality nn * @return True if rows match.
+   * Compares the row of two keyvalues for equality
+   * @return True if rows match.
    */
   public static boolean matchingRows(final Cell left, final Cell right) {
     short lrowlength = left.getRowLength();
@@ -1526,8 +1529,8 @@ public final class CellUtil {
   }
 
   /**
-   * Compares the row and column of two keyvalues for equality nn * @return True if same row and
-   * column.
+   * Compares the row and column of two keyvalues for equality
+   * @return True if same row and column.
    */
   public static boolean matchingRowColumn(final Cell left, final Cell right) {
     short lrowlength = left.getRowLength();
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/CompoundConfiguration.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/CompoundConfiguration.java
index ddbf71cac13..432556d2642 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/CompoundConfiguration.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/CompoundConfiguration.java
@@ -145,7 +145,7 @@ public class CompoundConfiguration extends Configuration {
   /**
    * Add Bytes map to config list. This map is generally created by HTableDescriptor or
    * HColumnDescriptor, but can be abstractly used. The added configuration overrides the previous
-   * ones if there are name collisions. n * Bytes map
+   * ones if there are name collisions. Bytes map
    * @return this, for builder pattern
    */
   public CompoundConfiguration addBytesMap(final Map<Bytes, Bytes> map) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/ExtendedCell.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/ExtendedCell.java
index b3b7a1c5e57..28e648ec466 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/ExtendedCell.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/ExtendedCell.java
@@ -41,7 +41,7 @@ public interface ExtendedCell extends RawCell, HeapSize {
    * &lt;tags&gt;</code>
    * @param out      Stream to which cell has to be written
    * @param withTags Whether to write tags.
-   * @return how many bytes are written. n
+   * @return how many bytes are written.
    */
   // TODO remove the boolean param once HBASE-16706 is done.
   default int write(OutputStream out, boolean withTags) throws IOException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/HBaseConfiguration.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/HBaseConfiguration.java
index e93cb5178df..91b875cae9f 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/HBaseConfiguration.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/HBaseConfiguration.java
@@ -200,7 +200,7 @@ public class HBaseConfiguration extends Configuration {
    * @param conf    configuration instance for accessing the passwords
    * @param alias   the name of the password element
    * @param defPass the default password
-   * @return String password or default password n
+   * @return String password or default password
    */
   public static String getPassword(Configuration conf, String alias, String defPass)
     throws IOException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValue.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValue.java
index 9dfe73bb0b5..49532d6e46c 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValue.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValue.java
@@ -247,8 +247,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
     }
 
     /**
-     * Cannot rely on enum ordinals . They change if item is removed or moved. Do our own codes. n
-     * * @return Type associated with passed code.
+     * Cannot rely on enum ordinals . They change if item is removed or moved. Do our own codes.
+     * @return Type associated with passed code.
      */
     public static Type codeToType(final byte b) {
       Type t = codeArray[b & 0xff];
@@ -334,7 +334,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * <code>length</code>.
    * @param bytes  byte array
    * @param offset offset to start of the KeyValue
-   * @param length length of the KeyValue n
+   * @param length length of the KeyValue
    */
   public KeyValue(final byte[] bytes, final int offset, final int length, long ts) {
     this(bytes, offset, length, null, 0, 0, null, 0, 0, ts, Type.Maximum, null, 0, 0, null);
@@ -345,7 +345,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
   /**
    * Constructs KeyValue structure filled with null value. Sets type to
    * {@link KeyValue.Type#Maximum}
-   * @param row - row key (arbitrary byte array) n
+   * @param row - row key (arbitrary byte array)
    */
   public KeyValue(final byte[] row, final long timestamp) {
     this(row, null, null, timestamp, Type.Maximum, null);
@@ -353,7 +353,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
 
   /**
    * Constructs KeyValue structure filled with null value.
-   * @param row - row key (arbitrary byte array) n
+   * @param row - row key (arbitrary byte array)
    */
   public KeyValue(final byte[] row, final long timestamp, Type type) {
     this(row, null, null, timestamp, type, null);
@@ -387,7 +387,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param family    family name
    * @param qualifier column qualifier
    * @param timestamp version timestamp
-   * @param type      key type n
+   * @param type      key type
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, Type type) {
@@ -400,7 +400,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param family    family name
    * @param qualifier column qualifier
    * @param timestamp version timestamp
-   * @param value     column value n
+   * @param value     column value
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, final byte[] value) {
@@ -414,7 +414,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qualifier column qualifier
    * @param timestamp version timestamp
    * @param value     column value
-   * @param tags      tags n
+   * @param tags      tags
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, final byte[] value, final Tag[] tags) {
@@ -428,7 +428,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qualifier column qualifier
    * @param timestamp version timestamp
    * @param value     column value
-   * @param tags      tags non-empty list of tags or null n
+   * @param tags      tags non-empty list of tags or null
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, final byte[] value, final List<Tag> tags) {
@@ -444,7 +444,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qualifier column qualifier
    * @param timestamp version timestamp
    * @param type      key type
-   * @param value     column value n
+   * @param value     column value
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, Type type, final byte[] value) {
@@ -461,7 +461,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qualifier column qualifier
    * @param timestamp version timestamp
    * @param type      key type
-   * @param value     column value n
+   * @param value     column value
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, Type type, final byte[] value, final List<Tag> tags) {
@@ -476,7 +476,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qualifier column qualifier
    * @param timestamp version timestamp
    * @param type      key type
-   * @param value     column value n
+   * @param value     column value
    */
   public KeyValue(final byte[] row, final byte[] family, final byte[] qualifier,
     final long timestamp, Type type, final byte[] value, final byte[] tags) {
@@ -495,7 +495,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param type      key type
    * @param value     column value
    * @param voffset   value offset
-   * @param vlength   value length n
+   * @param vlength   value length
    */
   public KeyValue(byte[] row, byte[] family, byte[] qualifier, int qoffset, int qlength,
     long timestamp, Type type, byte[] value, int voffset, int vlength, List<Tag> tags) {
@@ -504,8 +504,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
   }
 
   /**
-   * nnnnnnnnnnn
-   */
+   *   */
   public KeyValue(byte[] row, byte[] family, byte[] qualifier, int qoffset, int qlength,
     long timestamp, Type type, byte[] value, int voffset, int vlength, byte[] tags) {
     this(row, 0, row == null ? 0 : row.length, family, 0, family == null ? 0 : family.length,
@@ -517,7 +516,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * Constructs KeyValue structure filled with specified values.
    * <p>
    * Column is split into two fields, family and qualifier.
-   * @param row row key n
+   * @param row row key
    */
   public KeyValue(final byte[] row, final int roffset, final int rlength, final byte[] family,
     final int foffset, final int flength, final byte[] qualifier, final int qoffset,
@@ -580,7 +579,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param value     column value
    * @param voffset   value offset
    * @param vlength   value length
-   * @param tags      tags n
+   * @param tags      tags
    */
   public KeyValue(final byte[] row, final int roffset, final int rlength, final byte[] family,
     final int foffset, final int flength, final byte[] qualifier, final int qoffset,
@@ -593,8 +592,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
   }
 
   /**
-   * nnnnnnnnnnnnnnn
-   */
+   *   */
   public KeyValue(final byte[] row, final int roffset, final int rlength, final byte[] family,
     final int foffset, final int flength, final byte[] qualifier, final int qoffset,
     final int qlength, final long timestamp, final Type type, final byte[] value, final int voffset,
@@ -615,7 +613,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qlength   qualifier length
    * @param timestamp version timestamp
    * @param type      key type
-   * @param vlength   value length n
+   * @param vlength   value length
    */
   public KeyValue(final int rlength, final int flength, final int qlength, final long timestamp,
     final Type type, final int vlength) {
@@ -632,7 +630,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param qlength   qualifier length
    * @param timestamp version timestamp
    * @param type      key type
-   * @param vlength   value length nn
+   * @param vlength   value length
    */
   public KeyValue(final int rlength, final int flength, final int qlength, final long timestamp,
     final Type type, final int vlength, final int tagsLength) {
@@ -662,7 +660,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
 
   /**
    * Create an empty byte[] representing a KeyValue All lengths are preset and can be filled in
-   * later. nnnnnn * @return The newly created byte array.
+   * later.
+   * @return The newly created byte array.
    */
   private static byte[] createEmptyByteArray(final int rlength, int flength, int qlength,
     final long timestamp, final Type type, int vlength, int tagsLength) {
@@ -987,7 +986,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
 
   /**
    * Clones a KeyValue. This creates a copy, re-allocating the buffer.
-   * @return Fully copied clone of this KeyValue n
+   * @return Fully copied clone of this KeyValue
    */
   @Override
   public KeyValue clone() throws CloneNotSupportedException {
@@ -1338,15 +1337,14 @@ public class KeyValue implements ExtendedCell, Cloneable {
   }
 
   /**
-   * n
-   */
+   *   */
   @Override
   public long getTimestamp() {
     return getTimestamp(getKeyLength());
   }
 
   /**
-   * @param keylength Pass if you have it to save on a int creation. n
+   * @param keylength Pass if you have it to save on a int creation.
    */
   long getTimestamp(final int keylength) {
     int tsOffset = getTimestampOffset(keylength);
@@ -1416,9 +1414,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
     return new KeyValue(newBuffer);
   }
 
-  /**
-   * nn * @return Index of delimiter having started from start of <code>b</code> moving rightward.
-   */
+  /** Returns Index of delimiter having started from start of <code>b</code> moving rightward. */
   public static int getDelimiter(final byte[] b, int offset, final int length,
     final int delimiter) {
     if (b == null) {
@@ -1435,8 +1431,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
   }
 
   /**
-   * Find index of passed delimiter walking from end of buffer backwards. nn * @return Index of
-   * delimiter
+   * Find index of passed delimiter walking from end of buffer backwards.
+   * @return Index of delimiter
    */
   public static int getDelimiterInReverse(final byte[] b, final int offset, final int length,
     final int delimiter) {
@@ -1587,7 +1583,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
 
     /**
      * Compares the only the user specified portion of a Key. This is overridden by MetaComparator.
-     * nn * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
+     * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
      */
     protected int compareRowKey(final Cell left, final Cell right) {
       return CellComparatorImpl.COMPARATOR.compareRows(left, right);
@@ -1595,8 +1591,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
 
     /**
      * Compares left to right assuming that left,loffset,llength and right,roffset,rlength are full
-     * KVs laid out in a flat byte[]s. nnnnnn * @return 0 if equal, &lt;0 if left smaller, &gt;0 if
-     * right smaller
+     * KVs laid out in a flat byte[]s.
+     * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
      */
     public int compareFlatKey(byte[] left, int loffset, int llength, byte[] right, int roffset,
       int rlength) {
@@ -1685,17 +1681,15 @@ public class KeyValue implements ExtendedCell, Cloneable {
       return CellComparatorImpl.COMPARATOR.compareTimestamps(left, right);
     }
 
-    /**
-     * nn * @return Result comparing rows.
-     */
+    /** Returns Result comparing rows. */
     public int compareRows(final Cell left, final Cell right) {
       return compareRows(left.getRowArray(), left.getRowOffset(), left.getRowLength(),
         right.getRowArray(), right.getRowOffset(), right.getRowLength());
     }
 
     /**
-     * Get the b[],o,l for left and right rowkey portions and compare. nnnnnn * @return 0 if equal,
-     * &lt;0 if left smaller, &gt;0 if right smaller
+     * Get the b[],o,l for left and right rowkey portions and compare.
+     * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
      */
     public int compareRows(byte[] left, int loffset, int llength, byte[] right, int roffset,
       int rlength) {
@@ -1733,7 +1727,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
     }
 
     /**
-     * Overridden nnnnnnn * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
+     * Overridden
+     * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
      */
     @Override // SamePrefixComparator
     public int compareIgnoringPrefix(int commonPrefix, byte[] left, int loffset, int llength,
@@ -1771,8 +1766,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
      * Compare columnFamily, qualifier, timestamp, and key type (everything except the row). This
      * method is used both in the normal comparator and the "same-prefix" comparator. Note that we
      * are assuming that row portions of both KVs have already been parsed and found identical, and
-     * we don't validate that assumption here. n * the length of the common prefix of the two
-     * key-values being compared, including row length and row
+     * we don't validate that assumption here. the length of the common prefix of the two key-values
+     * being compared, including row length and row
      */
     private int compareWithoutRow(int commonPrefix, byte[] left, int loffset, int llength,
       byte[] right, int roffset, int rlength, short rowlength) {
@@ -1866,8 +1861,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
     }
 
     /**
-     * Compares the row and column of two keyvalues for equality nn * @return True if same row and
-     * column.
+     * Compares the row and column of two keyvalues for equality
+     * @return True if same row and column.
      */
     public boolean matchingRowColumn(final Cell left, final Cell right) {
       short lrowlength = left.getRowLength();
@@ -1903,7 +1898,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
     }
 
     /**
-     * Compares the row of two keyvalues for equality nn * @return True if rows match.
+     * Compares the row of two keyvalues for equality
+     * @return True if rows match.
      */
     public boolean matchingRows(final Cell left, final Cell right) {
       short lrowlength = left.getRowLength();
@@ -1911,9 +1907,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
       return matchingRows(left, lrowlength, right, rrowlength);
     }
 
-    /**
-     * nnnn * @return True if rows match.
-     */
+    /** Returns True if rows match. */
     private boolean matchingRows(final Cell left, final short lrowlength, final Cell right,
       final short rrowlength) {
       return lrowlength == rrowlength && matchingRows(left.getRowArray(), left.getRowOffset(),
@@ -1952,8 +1946,8 @@ public class KeyValue implements ExtendedCell, Cloneable {
     }
 
     /**
-     * This is a HFile block index key optimization. nn * @return 0 if equal, &lt;0 if left smaller,
-     * &gt;0 if right smaller
+     * This is a HFile block index key optimization.
+     * @return 0 if equal, &lt;0 if left smaller, &gt;0 if right smaller
      * @deprecated Since 0.99.2;
      */
     @Deprecated
@@ -2037,16 +2031,16 @@ public class KeyValue implements ExtendedCell, Cloneable {
    * @param in Where to read bytes from. Creates a byte array to hold the KeyValue backing bytes
    *           copied from the steam.
    * @return KeyValue created by deserializing from <code>in</code> OR if we find a length of zero,
-   *         we will return null which can be useful marking a stream as done. n
+   *         we will return null which can be useful marking a stream as done.
    */
   public static KeyValue create(final DataInput in) throws IOException {
     return create(in.readInt(), in);
   }
 
   /**
-   * Create a KeyValue reading <code>length</code> from <code>in</code> nn * @return Created
-   * KeyValue OR if we find a length of zero, we will return null which can be useful marking a
-   * stream as done. n
+   * Create a KeyValue reading <code>length</code> from <code>in</code>
+   * @return Created KeyValue OR if we find a length of zero, we will return null which can be
+   *         useful marking a stream as done.
    */
   public static KeyValue create(int length, final DataInput in) throws IOException {
 
@@ -2062,8 +2056,9 @@ public class KeyValue implements ExtendedCell, Cloneable {
   }
 
   /**
-   * Write out a KeyValue in the manner in which we used to when KeyValue was a Writable. nn
-   * * @return Length written on stream n * @see #create(DataInput) for the inverse function
+   * Write out a KeyValue in the manner in which we used to when KeyValue was a Writable.
+   * @return Length written on stream
+   * @see #create(DataInput) for the inverse function
    */
   public static long write(final KeyValue kv, final DataOutput out) throws IOException {
     // This is how the old Writables write used to serialize KVs. Need to figure way to make it
@@ -2077,8 +2072,9 @@ public class KeyValue implements ExtendedCell, Cloneable {
   /**
    * Write out a KeyValue in the manner in which we used to when KeyValue was a Writable but do not
    * require a {@link DataOutput}, just take plain {@link OutputStream} Named <code>oswrite</code>
-   * so does not clash with {@link #write(KeyValue, DataOutput)} nnn * @return Length written on
-   * stream n * @see #create(DataInput) for the inverse function
+   * so does not clash with {@link #write(KeyValue, DataOutput)}
+   * @return Length written on stream
+   * @see #create(DataInput) for the inverse function
    * @see #write(KeyValue, DataOutput)
    * @see KeyValueUtil#oswrite(Cell, OutputStream, boolean)
    * @deprecated As of release 2.0.0, this will be removed in HBase 3.0.0. Instead use
@@ -2194,7 +2190,7 @@ public class KeyValue implements ExtendedCell, Cloneable {
 
     /**
      * A setter that helps to avoid object creation every time and whenever there is a need to
-     * create new KeyOnlyKeyValue. nnn
+     * create new KeyOnlyKeyValue.
      */
     public void setKey(byte[] key, int offset, int length) {
       this.bytes = key;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueTestUtil.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueTestUtil.java
index 4291d904fe8..ed3687e9ed4 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueTestUtil.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueTestUtil.java
@@ -55,8 +55,8 @@ public class KeyValueTestUtil {
 
   /**
    * Checks whether KeyValues from kvCollection2 are contained in kvCollection1. The comparison is
-   * made without distinguishing MVCC version of the KeyValues nn * @return true if KeyValues from
-   * kvCollection2 are contained in kvCollection1
+   * made without distinguishing MVCC version of the KeyValues
+   * @return true if KeyValues from kvCollection2 are contained in kvCollection1
    */
   public static boolean containsIgnoreMvccVersion(Collection<? extends Cell> kvCollection1,
     Collection<? extends Cell> kvCollection2) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueUtil.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueUtil.java
index 87b2adf02aa..368e3d69a04 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueUtil.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/KeyValueUtil.java
@@ -59,8 +59,8 @@ public class KeyValueUtil {
 
   /**
    * Returns number of bytes this cell's key part would have been used if serialized as in
-   * {@link KeyValue}. Key includes rowkey, family, qualifier, timestamp and type. n * @return the
-   * key length
+   * {@link KeyValue}. Key includes rowkey, family, qualifier, timestamp and type.
+   * @return the key length
    */
   public static int keyLength(final Cell cell) {
     return keyLength(cell.getRowLength(), cell.getFamilyLength(), cell.getQualifierLength());
@@ -97,8 +97,8 @@ public class KeyValueUtil {
   }
 
   /**
-   * The position will be set to the beginning of the new ByteBuffer n * @return the Bytebuffer
-   * containing the key part of the cell
+   * The position will be set to the beginning of the new ByteBuffer
+   * @return the Bytebuffer containing the key part of the cell
    */
   public static ByteBuffer copyKeyToNewByteBuffer(final Cell cell) {
     byte[] bytes = new byte[keyLength(cell)];
@@ -108,8 +108,8 @@ public class KeyValueUtil {
   }
 
   /**
-   * Copies the key to a new KeyValue n * @return the KeyValue that consists only the key part of
-   * the incoming cell
+   * Copies the key to a new KeyValue
+   * @return the KeyValue that consists only the key part of the incoming cell
    */
   public static KeyValue toNewKeyCell(final Cell cell) {
     byte[] bytes = new byte[keyLength(cell)];
@@ -204,7 +204,7 @@ public class KeyValueUtil {
 
   /**
    * Creates a new KeyValue object positioned in the supplied ByteBuffer and sets the ByteBuffer's
-   * position to the start of the next KeyValue. Does not allocate a new array or copy data. nnn
+   * position to the start of the next KeyValue. Does not allocate a new array or copy data.
    */
   public static KeyValue nextShallowCopy(final ByteBuffer bb, final boolean includesMvccVersion,
     boolean includesTags) {
@@ -238,7 +238,8 @@ public class KeyValueUtil {
 
   /**
    * Decrement the timestamp. For tests (currently wasteful) Remember timestamps are sorted reverse
-   * chronologically. n * @return previous key
+   * chronologically.
+   * @return previous key
    */
   public static KeyValue previousKey(final KeyValue in) {
     return createFirstOnRow(CellUtil.cloneRow(in), CellUtil.cloneFamily(in),
@@ -248,9 +249,8 @@ public class KeyValueUtil {
   /**
    * Create a KeyValue for the specified row, family and qualifier that would be larger than or
    * equal to all other possible KeyValues that have the same row, family, qualifier. Used for
-   * reseeking. Should NEVER be returned to a client. n * row key n * row offset n * row length n *
-   * family name n * family offset n * family length n * column qualifier n * qualifier offset n *
-   * qualifier length
+   * reseeking. Should NEVER be returned to a client. row key row offset row length family name
+   * family offset family length column qualifier qualifier offset qualifier length
    * @return Last possible key on passed row, family, qualifier.
    */
   public static KeyValue createLastOnRow(final byte[] row, final int roffset, final int rlength,
@@ -408,11 +408,11 @@ public class KeyValueUtil {
 
   /*************** misc **********************************/
   /**
-   * n * @return <code>cell</code> if it is an object of class {@link KeyValue} else we will return
-   * a new {@link KeyValue} instance made from <code>cell</code> Note: Even if the cell is an object
-   * of any of the subclass of {@link KeyValue}, we will create a new {@link KeyValue} object
-   * wrapping same buffer. This API is used only with MR based tools which expect the type to be
-   * exactly KeyValue. That is the reason for doing this way.
+   * @return <code>cell</code> if it is an object of class {@link KeyValue} else we will return a
+   *         new {@link KeyValue} instance made from <code>cell</code> Note: Even if the cell is an
+   *         object of any of the subclass of {@link KeyValue}, we will create a new
+   *         {@link KeyValue} object wrapping same buffer. This API is used only with MR based tools
+   *         which expect the type to be exactly KeyValue. That is the reason for doing this way.
    * @deprecated without any replacement.
    */
   @Deprecated
@@ -444,8 +444,9 @@ public class KeyValueUtil {
   }
 
   /**
-   * Write out a KeyValue in the manner in which we used to when KeyValue was a Writable. nn
-   * * @return Length written on stream n * @see #create(DataInput) for the inverse function
+   * Write out a KeyValue in the manner in which we used to when KeyValue was a Writable.
+   * @return Length written on stream
+   * @see #create(DataInput) for the inverse function
    */
   public static long write(final KeyValue kv, final DataOutput out) throws IOException {
     // This is how the old Writables write used to serialize KVs. Need to figure
@@ -639,7 +640,7 @@ public class KeyValueUtil {
    * @param in       inputStream to read.
    * @param withTags whether the keyvalue should include tags are not
    * @return Created KeyValue OR if we find a length of zero, we will return null which can be
-   *         useful marking a stream as done. n
+   *         useful marking a stream as done.
    */
   public static KeyValue createKeyValueFromInputStream(InputStream in, boolean withTags)
     throws IOException {
@@ -663,24 +664,24 @@ public class KeyValueUtil {
   }
 
   /**
-   * n * @return A KeyValue made of a byte array that holds the key-only part. Needed to convert
-   * hfile index members to KeyValues.
+   * Returns a KeyValue made of a byte array that holds the key-only part. Needed to convert hfile
+   * index members to KeyValues.
    */
   public static KeyValue createKeyValueFromKey(final byte[] b) {
     return createKeyValueFromKey(b, 0, b.length);
   }
 
   /**
-   * n * @return A KeyValue made of a byte buffer that holds the key-only part. Needed to convert
-   * hfile index members to KeyValues.
+   * Return a KeyValue made of a byte buffer that holds the key-only part. Needed to convert hfile
+   * index members to KeyValues.
    */
   public static KeyValue createKeyValueFromKey(final ByteBuffer bb) {
     return createKeyValueFromKey(bb.array(), bb.arrayOffset(), bb.limit());
   }
 
   /**
-   * nnn * @return A KeyValue made of a byte array that holds the key-only part. Needed to convert
-   * hfile index members to KeyValues.
+   * Return a KeyValue made of a byte array that holds the key-only part. Needed to convert hfile
+   * index members to KeyValues.
    */
   public static KeyValue createKeyValueFromKey(final byte[] b, final int o, final int l) {
     byte[] newb = new byte[l + KeyValue.ROW_OFFSET];
@@ -691,19 +692,19 @@ public class KeyValueUtil {
   }
 
   /**
-   * n * Where to read bytes from. Creates a byte array to hold the KeyValue backing bytes copied
-   * from the steam.
+   * Where to read bytes from. Creates a byte array to hold the KeyValue backing bytes copied from
+   * the steam.
    * @return KeyValue created by deserializing from <code>in</code> OR if we find a length of zero,
-   *         we will return null which can be useful marking a stream as done. n
+   *         we will return null which can be useful marking a stream as done.
    */
   public static KeyValue create(final DataInput in) throws IOException {
     return create(in.readInt(), in);
   }
 
   /**
-   * Create a KeyValue reading <code>length</code> from <code>in</code> nn * @return Created
-   * KeyValue OR if we find a length of zero, we will return null which can be useful marking a
-   * stream as done. n
+   * Create a KeyValue reading <code>length</code> from <code>in</code>
+   * @return Created KeyValue OR if we find a length of zero, we will return null which can be
+   *         useful marking a stream as done.
    */
   public static KeyValue create(int length, final DataInput in) throws IOException {
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java
index b3e70132dfc..9a6624d43f5 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/PrivateCellUtil.java
@@ -869,7 +869,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Copies the tags info into the tag portion of the cell nnn * @return position after tags
+   * Copies the tags info into the tag portion of the cell
+   * @return position after tags
    */
   public static int copyTagsTo(Cell cell, byte[] destination, int destinationOffset) {
     int tlen = cell.getTagsLength();
@@ -885,7 +886,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Copies the tags info into the tag portion of the cell nnn * @return the position after tags
+   * Copies the tags info into the tag portion of the cell
+   * @return the position after tags
    */
   public static int copyTagsTo(Cell cell, ByteBuffer destination, int destinationOffset) {
     int tlen = cell.getTagsLength();
@@ -1002,7 +1004,7 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Write rowkey excluding the common part. nnnnn
+   * Write rowkey excluding the common part.
    */
   public static void writeRowKeyExcludingCommon(Cell cell, short rLen, int commonPrefix,
     DataOutputStream out) throws IOException {
@@ -1023,7 +1025,7 @@ public final class PrivateCellUtil {
    * Writes the row from the given cell to the output stream excluding the common prefix
    * @param out     The dataoutputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param rlength the row length n
+   * @param rlength the row length
    */
   public static void writeRowSkippingBytes(DataOutputStream out, Cell cell, short rlength,
     int commonPrefix) throws IOException {
@@ -1211,8 +1213,8 @@ public final class PrivateCellUtil {
 
   /**
    * Compares only the key portion of a cell. It does not include the sequence id/mvcc of the cell
-   * nn * @return an int greater than 0 if left &gt; than right lesser than 0 if left &lt; than
-   * right equal to 0 if left is equal to right
+   * @return an int greater than 0 if left &gt; than right lesser than 0 if left &lt; than right
+   *         equal to 0 if left is equal to right
    */
   public static final int compareKeyIgnoresMvcc(CellComparator comparator, Cell left, Cell right) {
     return ((CellComparatorImpl) comparator).compare(left, right, true);
@@ -2171,7 +2173,7 @@ public final class PrivateCellUtil {
   /**
    * Writes the Cell's key part as it would have serialized in a KeyValue. The format is &lt;2 bytes
    * rk len&gt;&lt;rk&gt;&lt;1 byte cf len&gt;&lt;cf&gt;&lt;qualifier&gt;&lt;8 bytes
-   * timestamp&gt;&lt;1 byte type&gt; nnn
+   * timestamp&gt;&lt;1 byte type&gt;
    */
   public static void writeFlatKey(Cell cell, DataOutput out) throws IOException {
     short rowLen = cell.getRowLength();
@@ -2203,7 +2205,7 @@ public final class PrivateCellUtil {
   /**
    * Deep clones the given cell if the cell supports deep cloning
    * @param cell the cell to be cloned
-   * @return the cloned cell n
+   * @return the cloned cell
    */
   public static Cell deepClone(Cell cell) throws CloneNotSupportedException {
     if (cell instanceof ExtendedCell) {
@@ -2217,7 +2219,7 @@ public final class PrivateCellUtil {
    * @param cell     the cell to be written
    * @param out      the outputstream
    * @param withTags if tags are to be written or not
-   * @return the total bytes written n
+   * @return the total bytes written
    */
   public static int writeCell(Cell cell, OutputStream out, boolean withTags) throws IOException {
     if (cell instanceof ExtendedCell) {
@@ -2292,8 +2294,8 @@ public final class PrivateCellUtil {
 
   /**
    * Sets the given seqId to the cell. Marked as audience Private as of 1.2.0. Setting a Cell
-   * sequenceid is an internal implementation detail not for general public use. nn * @throws
-   * IOException when the passed cell is not of type {@link ExtendedCell}
+   * sequenceid is an internal implementation detail not for general public use.
+   * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    */
   public static void setSequenceId(Cell cell, long seqId) throws IOException {
     if (cell instanceof ExtendedCell) {
@@ -2305,8 +2307,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Sets the given timestamp to the cell. nn * @throws IOException when the passed cell is not of
-   * type {@link ExtendedCell}
+   * Sets the given timestamp to the cell.
+   * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    */
   public static void setTimestamp(Cell cell, long ts) throws IOException {
     if (cell instanceof ExtendedCell) {
@@ -2318,7 +2320,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Sets the given timestamp to the cell. n * @param ts buffer containing the timestamp value
+   * Sets the given timestamp to the cell.
+   * @param ts buffer containing the timestamp value
    * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    */
   public static void setTimestamp(Cell cell, byte[] ts) throws IOException {
@@ -2332,7 +2335,8 @@ public final class PrivateCellUtil {
 
   /**
    * Sets the given timestamp to the cell iff current timestamp is
-   * {@link HConstants#LATEST_TIMESTAMP}. nn * @return True if cell timestamp is modified.
+   * {@link HConstants#LATEST_TIMESTAMP}.
+   * @return True if cell timestamp is modified.
    * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    */
   public static boolean updateLatestStamp(Cell cell, long ts) throws IOException {
@@ -2345,7 +2349,8 @@ public final class PrivateCellUtil {
 
   /**
    * Sets the given timestamp to the cell iff current timestamp is
-   * {@link HConstants#LATEST_TIMESTAMP}. n * @param ts buffer containing the timestamp value
+   * {@link HConstants#LATEST_TIMESTAMP}.
+   * @param ts buffer containing the timestamp value
    * @return True if cell timestamp is modified.
    * @throws IOException when the passed cell is not of type {@link ExtendedCell}
    */
@@ -2361,7 +2366,7 @@ public final class PrivateCellUtil {
    * Writes the row from the given cell to the output stream
    * @param out     The outputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param rlength the row length n
+   * @param rlength the row length
    */
   public static void writeRow(OutputStream out, Cell cell, short rlength) throws IOException {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2376,7 +2381,7 @@ public final class PrivateCellUtil {
    * Writes the family from the given cell to the output stream
    * @param out     The outputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param flength the family length n
+   * @param flength the family length
    */
   public static void writeFamily(OutputStream out, Cell cell, byte flength) throws IOException {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2391,7 +2396,7 @@ public final class PrivateCellUtil {
    * Writes the qualifier from the given cell to the output stream
    * @param out     The outputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param qlength the qualifier length n
+   * @param qlength the qualifier length
    */
   public static void writeQualifier(OutputStream out, Cell cell, int qlength) throws IOException {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2407,7 +2412,7 @@ public final class PrivateCellUtil {
    * Writes the qualifier from the given cell to the output stream excluding the common prefix
    * @param out     The dataoutputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param qlength the qualifier length n
+   * @param qlength the qualifier length
    */
   public static void writeQualifierSkippingBytes(DataOutputStream out, Cell cell, int qlength,
     int commonPrefix) throws IOException {
@@ -2426,7 +2431,7 @@ public final class PrivateCellUtil {
    * Writes the value from the given cell to the output stream
    * @param out     The outputstream to which the data has to be written
    * @param cell    The cell whose contents has to be written
-   * @param vlength the value length n
+   * @param vlength the value length
    */
   public static void writeValue(OutputStream out, Cell cell, int vlength) throws IOException {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2441,7 +2446,7 @@ public final class PrivateCellUtil {
    * Writes the tag from the given cell to the output stream
    * @param out        The outputstream to which the data has to be written
    * @param cell       The cell whose contents has to be written
-   * @param tagsLength the tag length n
+   * @param tagsLength the tag length
    */
   public static void writeTags(OutputStream out, Cell cell, int tagsLength) throws IOException {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2474,7 +2479,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Converts the rowkey bytes of the given cell into an int value n * @return rowkey as int
+   * Converts the rowkey bytes of the given cell into an int value
+   * @return rowkey as int
    */
   public static int getRowAsInt(Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2485,7 +2491,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Converts the value bytes of the given cell into a long value n * @return value as long
+   * Converts the value bytes of the given cell into a long value
+   * @return value as long
    */
   public static long getValueAsLong(Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2496,7 +2503,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Converts the value bytes of the given cell into a int value n * @return value as int
+   * Converts the value bytes of the given cell into a int value
+   * @return value as int
    */
   public static int getValueAsInt(Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2507,7 +2515,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Converts the value bytes of the given cell into a double value n * @return value as double
+   * Converts the value bytes of the given cell into a double value
+   * @return value as double
    */
   public static double getValueAsDouble(Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2518,7 +2527,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Converts the value bytes of the given cell into a BigDecimal n * @return value as BigDecimal
+   * Converts the value bytes of the given cell into a BigDecimal
+   * @return value as BigDecimal
    */
   public static BigDecimal getValueAsBigDecimal(Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2739,8 +2749,9 @@ public final class PrivateCellUtil {
   /**
    * Estimate based on keyvalue's serialization format in the RPC layer. Note that there is an extra
    * SIZEOF_INT added to the size here that indicates the actual length of the cell for cases where
-   * cell's are serialized in a contiguous format (For eg in RPCs). n * @return Estimate of the
-   * <code>cell</code> size in bytes plus an extra SIZEOF_INT indicating the actual cell length.
+   * cell's are serialized in a contiguous format (For eg in RPCs).
+   * @return Estimate of the <code>cell</code> size in bytes plus an extra SIZEOF_INT indicating the
+   *         actual cell length.
    */
   public static int estimatedSerializedSizeOf(final Cell cell) {
     return cell.getSerializedSize() + Bytes.SIZEOF_INT;
@@ -2760,9 +2771,9 @@ public final class PrivateCellUtil {
   /**
    * This method exists just to encapsulate how we serialize keys. To be replaced by a factory that
    * we query to figure what the Cell implementation is and then, what serialization engine to use
-   * and further, how to serialize the key for inclusion in hfile index. TODO. n * @return The key
-   * portion of the Cell serialized in the old-school KeyValue way or null if passed a null
-   * <code>cell</code>
+   * and further, how to serialize the key for inclusion in hfile index. TODO.
+   * @return The key portion of the Cell serialized in the old-school KeyValue way or null if passed
+   *         a null <code>cell</code>
    */
   public static byte[] getCellKeySerializedAsKeyValueKey(final Cell cell) {
     if (cell == null) return null;
@@ -2772,8 +2783,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Create a Cell that is smaller than all other possible Cells for the given Cell's row. n
-   * * @return First possible Cell on passed Cell's row.
+   * Create a Cell that is smaller than all other possible Cells for the given Cell's row.
+   * @return First possible Cell on passed Cell's row.
    */
   public static Cell createFirstOnRow(final Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2837,8 +2848,8 @@ public final class PrivateCellUtil {
 
   /**
    * Create a Cell that is smaller than all other possible Cells for the given Cell's rk:cf and
-   * passed qualifier. nnnn * @return Last possible Cell on passed Cell's rk:cf and passed
-   * qualifier.
+   * passed qualifier.
+   * @return Last possible Cell on passed Cell's rk:cf and passed qualifier.
    */
   public static Cell createFirstOnRowCol(final Cell cell, byte[] qArray, int qoffest, int qlength) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2858,7 +2869,7 @@ public final class PrivateCellUtil {
    * Creates the first cell with the row/family/qualifier of this cell and the given timestamp. Uses
    * the "maximum" type that guarantees that the new cell is the lowest possible for this
    * combination of row, family, qualifier, and timestamp. This cell's own timestamp is ignored.
-   * @param cell - cell n
+   * @param cell - cell
    */
   public static Cell createFirstOnRowColTS(Cell cell, long ts) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2876,8 +2887,8 @@ public final class PrivateCellUtil {
   }
 
   /**
-   * Create a Cell that is larger than all other possible Cells for the given Cell's row. n
-   * * @return Last possible Cell on passed Cell's row.
+   * Create a Cell that is larger than all other possible Cells for the given Cell's row.
+   * @return Last possible Cell on passed Cell's row.
    */
   public static Cell createLastOnRow(final Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
@@ -2894,7 +2905,8 @@ public final class PrivateCellUtil {
   /**
    * Create a Cell that is larger than all other possible Cells for the given Cell's rk:cf:q. Used
    * in creating "fake keys" for the multi-column Bloom filter optimization to skip the row/column
-   * we already know is not in the file. n * @return Last possible Cell on passed Cell's rk:cf:q.
+   * we already know is not in the file.
+   * @return Last possible Cell on passed Cell's rk:cf:q.
    */
   public static Cell createLastOnRowCol(final Cell cell) {
     if (cell instanceof ByteBufferExtendedCell) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/Tag.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/Tag.java
index fd0aa43190b..588bd1bc80b 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/Tag.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/Tag.java
@@ -62,7 +62,7 @@ public interface Tag {
   boolean hasArray();
 
   /**
-   * @return The array containing the value bytes. n * when {@link #hasArray()} return false. Use
+   * @return The array containing the value bytes. when {@link #hasArray()} return false. Use
    *         {@link #getValueByteBuffer()} in such situation
    */
   byte[] getValueArray();
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/BaseDecoder.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/BaseDecoder.java
index be8e4e769ba..9a2a29356b1 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/BaseDecoder.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/BaseDecoder.java
@@ -95,7 +95,7 @@ public abstract class BaseDecoder implements Codec.Decoder {
   /**
    * Extract a Cell.
    * @return a parsed Cell or throws an Exception. EOFException or a generic IOException maybe
-   *         thrown if EOF is reached prematurely. Does not return null. n
+   *         thrown if EOF is reached prematurely. Does not return null.
    */
   @NonNull
   protected abstract Cell parseCell() throws IOException;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodec.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodec.java
index e7facdbfbf2..f4552c03826 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodec.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodec.java
@@ -62,7 +62,7 @@ public class CellCodec implements Codec {
     }
 
     /**
-     * Write int length followed by array bytes. nnnn
+     * Write int length followed by array bytes.
      */
     private void write(final byte[] bytes, final int offset, final int length) throws IOException {
       // TODO add BB backed os check and do for write. Pass Cell
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodecWithTags.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodecWithTags.java
index 75e3d48d9fa..07bfb53d5df 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodecWithTags.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/codec/CellCodecWithTags.java
@@ -65,7 +65,7 @@ public class CellCodecWithTags implements Codec {
     }
 
     /**
-     * Write int length followed by array bytes. nnnn
+     * Write int length followed by array bytes.
      */
     private void write(final byte[] bytes, final int offset, final int length) throws IOException {
       this.out.write(Bytes.toBytes(length));
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/filter/ByteArrayComparable.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/filter/ByteArrayComparable.java
index 480680b00f3..c7b82024bbe 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/filter/ByteArrayComparable.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/filter/ByteArrayComparable.java
@@ -51,8 +51,8 @@ public abstract class ByteArrayComparable implements Comparable<byte[]> {
 
   /**
    * @param pbBytes A pb serialized {@link ByteArrayComparable} instance
-   * @return An instance of {@link ByteArrayComparable} made from <code>bytes</code> n * @see
-   *         #toByteArray
+   * @return An instance of {@link ByteArrayComparable} made from <code>bytes</code>
+   * @see #toByteArray
    */
   public static ByteArrayComparable parseFrom(final byte[] pbBytes)
     throws DeserializationException {
@@ -61,8 +61,8 @@ public abstract class ByteArrayComparable implements Comparable<byte[]> {
   }
 
   /**
-   * n * @return true if and only if the fields of the comparator that are serialized are equal to
-   * the corresponding fields in other. Used for testing.
+   * @return true if and only if the fields of the comparator that are serialized are equal to the
+   *         corresponding fields in other. Used for testing.
    */
   boolean areSerializedFieldsEqual(ByteArrayComparable other) {
     if (other == this) return true;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferOutputStream.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferOutputStream.java
index 86a2fefae7a..2b21546a72a 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferOutputStream.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferOutputStream.java
@@ -82,7 +82,7 @@ public class ByteBufferOutputStream extends OutputStream implements ByteBufferWr
   }
 
   /**
-   * This flips the underlying BB so be sure to use it _last_! n
+   * This flips the underlying BB so be sure to use it _last_!
    */
   public ByteBuffer getByteBuffer() {
     curBuf.flip();
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.java
index 0dee9e22ade..9c27d90ec26 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ByteBufferWriterOutputStream.java
@@ -61,8 +61,8 @@ public class ByteBufferWriterOutputStream extends OutputStream implements ByteBu
    * position of the ByteBuffer.
    * @param b   the ByteBuffer
    * @param off the start offset in the data
-   * @param len the number of bytes to write n * if an I/O error occurs. In particular, an
-   *            IOException is thrown if the output stream is closed.
+   * @param len the number of bytes to write if an I/O error occurs. In particular, an IOException
+   *            is thrown if the output stream is closed.
    */
   @Override
   public void write(ByteBuffer b, int off, int len) throws IOException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/CellOutputStream.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/CellOutputStream.java
index 1613bd563d0..d1310137e8c 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/CellOutputStream.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/CellOutputStream.java
@@ -38,14 +38,14 @@ public interface CellOutputStream {
    * Implementation must copy the entire state of the Cell. If the written Cell is modified
    * immediately after the write method returns, the modifications must have absolutely no effect on
    * the copy of the Cell that was added in the write.
-   * @param cell Cell to write out n
+   * @param cell Cell to write out
    */
   void write(Cell cell) throws IOException;
 
   /**
    * Let the implementation decide what to do. Usually means writing accumulated data into a byte[]
    * that can then be read from the implementation to be sent to disk, put in the block cache, or
-   * sent over the network. n
+   * sent over the network.
    */
   void flush() throws IOException;
 }
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ImmutableBytesWritable.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ImmutableBytesWritable.java
index da897b04ae1..1ce3a116f1e 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ImmutableBytesWritable.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/ImmutableBytesWritable.java
@@ -99,7 +99,7 @@ public class ImmutableBytesWritable implements WritableComparable<ImmutableBytes
   }
 
   /**
-   * @param b Use passed bytes as backing array for this instance. nn
+   * @param b Use passed bytes as backing array for this instance.
    */
   public void set(final byte[] b, final int offset, final int length) {
     this.bytes = b;
@@ -132,8 +132,7 @@ public class ImmutableBytesWritable implements WritableComparable<ImmutableBytes
   }
 
   /**
-   * n
-   */
+   *   */
   public int getOffset() {
     return this.offset;
   }
@@ -174,8 +173,9 @@ public class ImmutableBytesWritable implements WritableComparable<ImmutableBytes
   }
 
   /**
-   * Compares the bytes in this object to the specified byte array n * @return Positive if left is
-   * bigger than right, 0 if they are equal, and negative if left is smaller than right.
+   * Compares the bytes in this object to the specified byte array
+   * @return Positive if left is bigger than right, 0 if they are equal, and negative if left is
+   *         smaller than right.
    */
   public int compareTo(final byte[] that) {
     return WritableComparator.compareBytes(this.bytes, this.offset, this.length, that, 0,
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/TagCompressionContext.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/TagCompressionContext.java
index b3c699c0070..8492c23d4da 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/TagCompressionContext.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/TagCompressionContext.java
@@ -57,7 +57,7 @@ public class TagCompressionContext {
    * @param out    Stream to which the compressed tags to be written
    * @param in     Source where tags are available
    * @param offset Offset for the tags bytes
-   * @param length Length of all tag bytes n
+   * @param length Length of all tag bytes
    */
   public void compressTags(OutputStream out, byte[] in, int offset, int length) throws IOException {
     int pos = offset;
@@ -76,7 +76,7 @@ public class TagCompressionContext {
    * @param out    Stream to which the compressed tags to be written
    * @param in     Source buffer where tags are available
    * @param offset Offset for the tags byte buffer
-   * @param length Length of all tag bytes n
+   * @param length Length of all tag bytes
    */
   public void compressTags(OutputStream out, ByteBuffer in, int offset, int length)
     throws IOException {
@@ -100,7 +100,7 @@ public class TagCompressionContext {
    * @param src    Stream where the compressed tags are available
    * @param dest   Destination array where to write the uncompressed tags
    * @param offset Offset in destination where tags to be written
-   * @param length Length of all tag bytes n
+   * @param length Length of all tag bytes
    */
   public void uncompressTags(InputStream src, byte[] dest, int offset, int length)
     throws IOException {
@@ -132,7 +132,7 @@ public class TagCompressionContext {
    * @param dest   Destination array where to write the uncompressed tags
    * @param offset Offset in destination where tags to be written
    * @param length Length of all tag bytes
-   * @return bytes count read from source to uncompress all tags. n
+   * @return bytes count read from source to uncompress all tags.
    */
   public int uncompressTags(ByteBuff src, byte[] dest, int offset, int length) throws IOException {
     int srcBeginPos = src.position();
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Cipher.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Cipher.java
index 09647b4ce91..f0152968162 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Cipher.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Cipher.java
@@ -86,7 +86,7 @@ public abstract class Cipher {
    * @param out     the output stream to wrap
    * @param context the encryption context
    * @param iv      initialization vector
-   * @return the encrypting wrapper n
+   * @return the encrypting wrapper
    */
   public abstract OutputStream createEncryptionStream(OutputStream out, Context context, byte[] iv)
     throws IOException;
@@ -95,7 +95,7 @@ public abstract class Cipher {
    * Create an encrypting output stream given an initialized encryptor
    * @param out       the output stream to wrap
    * @param encryptor the encryptor
-   * @return the encrypting wrapper n
+   * @return the encrypting wrapper
    */
   public abstract OutputStream createEncryptionStream(OutputStream out, Encryptor encryptor)
     throws IOException;
@@ -105,7 +105,7 @@ public abstract class Cipher {
    * @param in      the input stream to wrap
    * @param context the encryption context
    * @param iv      initialization vector
-   * @return the decrypting wrapper n
+   * @return the decrypting wrapper
    */
   public abstract InputStream createDecryptionStream(InputStream in, Context context, byte[] iv)
     throws IOException;
@@ -114,7 +114,7 @@ public abstract class Cipher {
    * Create a decrypting output stream given an initialized decryptor
    * @param in        the input stream to wrap
    * @param decryptor the decryptor
-   * @return the decrypting wrapper n
+   * @return the decrypting wrapper
    */
   public abstract InputStream createDecryptionStream(InputStream in, Decryptor decryptor)
     throws IOException;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Decryptor.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Decryptor.java
index 0d29fe990b9..93822784594 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Decryptor.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Decryptor.java
@@ -28,7 +28,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface Decryptor {
 
   /**
-   * Set the secret key n
+   * Set the secret key
    */
   public void setKey(Key key);
 
@@ -45,12 +45,12 @@ public interface Decryptor {
   public int getBlockSize();
 
   /**
-   * Set the initialization vector n
+   * Set the initialization vector
    */
   public void setIv(byte[] iv);
 
   /**
-   * Create a stream for decryption n
+   * Create a stream for decryption
    */
   public InputStream createDecryptionStream(InputStream in);
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryption.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryption.java
index 761fe04d6fc..13e335b82ee 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryption.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryption.java
@@ -318,7 +318,7 @@ public final class Encryption {
    * <p>
    * The encryptor's state will be finalized. It should be reinitialized or returned to the pool.
    * @param out ciphertext
-   * @param src plaintext nnnn
+   * @param src plaintext
    */
   public static void encrypt(OutputStream out, byte[] src, int offset, int length, Encryptor e)
     throws IOException {
@@ -333,7 +333,7 @@ public final class Encryption {
   /**
    * Encrypt a block of plaintext
    * @param out ciphertext
-   * @param src plaintext nnnnn
+   * @param src plaintext
    */
   public static void encrypt(OutputStream out, byte[] src, int offset, int length, Context context,
     byte[] iv) throws IOException {
@@ -349,7 +349,7 @@ public final class Encryption {
    * <p>
    * The encryptor's state will be finalized. It should be reinitialized or returned to the pool.
    * @param out ciphertext
-   * @param in  plaintext nn
+   * @param in  plaintext
    */
   public static void encrypt(OutputStream out, InputStream in, Encryptor e) throws IOException {
     OutputStream cout = e.createEncryptionStream(out);
@@ -363,7 +363,7 @@ public final class Encryption {
   /**
    * Encrypt a stream of plaintext given a context and IV
    * @param out ciphertext
-   * @param in  plaintet nnn
+   * @param in  plaintet
    */
   public static void encrypt(OutputStream out, InputStream in, Context context, byte[] iv)
     throws IOException {
@@ -378,7 +378,6 @@ public final class Encryption {
    * Decrypt a block of ciphertext read in from a stream with the given cipher and context
    * <p>
    * The decryptor's state will be finalized. It should be reinitialized or returned to the pool.
-   * nnnnnn
    */
   public static void decrypt(byte[] dest, int destOffset, InputStream in, int destSize, Decryptor d)
     throws IOException {
@@ -391,7 +390,7 @@ public final class Encryption {
   }
 
   /**
-   * Decrypt a block of ciphertext from a stream given a context and IV nnnnnnn
+   * Decrypt a block of ciphertext from a stream given a context and IV
    */
   public static void decrypt(byte[] dest, int destOffset, InputStream in, int destSize,
     Context context, byte[] iv) throws IOException {
@@ -402,7 +401,7 @@ public final class Encryption {
   }
 
   /**
-   * Decrypt a stream of ciphertext given a decryptor nnnnn
+   * Decrypt a stream of ciphertext given a decryptor
    */
   public static void decrypt(OutputStream out, InputStream in, int outLen, Decryptor d)
     throws IOException {
@@ -425,7 +424,7 @@ public final class Encryption {
   }
 
   /**
-   * Decrypt a stream of ciphertext given a context and IV nnnnnn
+   * Decrypt a stream of ciphertext given a context and IV
    */
   public static void decrypt(OutputStream out, InputStream in, int outLen, Context context,
     byte[] iv) throws IOException {
@@ -436,7 +435,8 @@ public final class Encryption {
   }
 
   /**
-   * Resolves a key for the given subject nn * @return a key for the given subject
+   * Resolves a key for the given subject
+   * @return a key for the given subject
    * @throws IOException if the key is not found
    */
   public static Key getSecretKeyForSubject(String subject, Configuration conf) throws IOException {
@@ -460,7 +460,7 @@ public final class Encryption {
    * @param in     plaintext
    * @param conf   configuration
    * @param cipher the encryption algorithm
-   * @param iv     the initialization vector, can be null n
+   * @param iv     the initialization vector, can be null
    */
   public static void encryptWithSubjectKey(OutputStream out, InputStream in, String subject,
     Configuration conf, Cipher cipher, byte[] iv) throws IOException {
@@ -482,7 +482,7 @@ public final class Encryption {
    * @param subject the subject's key alias
    * @param conf    configuration
    * @param cipher  the encryption algorithm
-   * @param iv      the initialization vector, can be null n
+   * @param iv      the initialization vector, can be null
    */
   public static void decryptWithSubjectKey(OutputStream out, InputStream in, int outLen,
     String subject, Configuration conf, Cipher cipher, byte[] iv) throws IOException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryptor.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryptor.java
index f030de3e174..34f0fa4c0f7 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryptor.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Encryptor.java
@@ -28,7 +28,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface Encryptor {
 
   /**
-   * Set the secret key n
+   * Set the secret key
    */
   public void setKey(Key key);
 
@@ -50,12 +50,12 @@ public interface Encryptor {
   public byte[] getIv();
 
   /**
-   * Set the initialization vector n
+   * Set the initialization vector
    */
   public void setIv(byte[] iv);
 
   /**
-   * Create a stream for encryption n
+   * Create a stream for encryption
    */
   public OutputStream createEncryptionStream(OutputStream out);
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/KeyProvider.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/KeyProvider.java
index 6c6ec5dd759..0852bc7f13f 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/KeyProvider.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/KeyProvider.java
@@ -31,13 +31,13 @@ public interface KeyProvider {
   public static final String PASSWORDFILE = "passwordfile";
 
   /**
-   * Initialize the key provider n
+   * Initialize the key provider
    */
   public void init(String params);
 
   /**
-   * Retrieve the key for a given key aliase n * @return the keys corresponding to the supplied
-   * alias, or null if a key is not found
+   * Retrieve the key for a given key aliase
+   * @return the keys corresponding to the supplied alias, or null if a key is not found
    */
   public Key getKey(String alias);
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java
index 4474efd4a31..236eeb2309b 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoder.java
@@ -89,8 +89,10 @@ public interface DataBlockEncoder {
   EncodedSeeker createSeeker(HFileBlockDecodingContext decodingCtx);
 
   /**
-   * Creates a encoder specific encoding context n * encoding strategy used n * header bytes to be
-   * written, put a dummy header here if the header is unknown n * HFile meta data
+   * Creates a encoder specific encoding context
+   * @param encoding strategy used
+   * @param header   bytes to be written, put a dummy header here if the header is unknown
+   * @param meta     HFile meta data
    * @return a newly created encoding context
    */
   HFileBlockEncodingContext newDataBlockEncodingContext(DataBlockEncoding encoding,
@@ -98,7 +100,8 @@ public interface DataBlockEncoder {
 
   /**
    * Creates an encoder specific decoding context, which will prepare the data before actual
-   * decoding n * HFile meta data
+   * decoding
+   * @param meta HFile meta data
    * @return a newly created decoding context
    */
   HFileBlockDecodingContext newDataBlockDecodingContext(HFileContext meta);
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoding.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoding.java
index 71808adf75d..47cc9109498 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoding.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/DataBlockEncoding.java
@@ -98,7 +98,7 @@ public enum DataBlockEncoding {
   /**
    * Writes id bytes to the given array starting from offset.
    * @param dest   output array
-   * @param offset starting offset of the output array n
+   * @param offset starting offset of the output array
    */
   public void writeIdInBytes(byte[] dest, int offset) throws IOException {
     System.arraycopy(idInBytes, 0, dest, offset, ID_SIZE);
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/EncodedDataBlock.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/EncodedDataBlock.java
index 8a3b7feb17e..e77738d9f85 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/EncodedDataBlock.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/EncodedDataBlock.java
@@ -69,7 +69,7 @@ public class EncodedDataBlock {
   /**
    * Create a buffer which will be encoded using dataBlockEncoder.
    * @param dataBlockEncoder Algorithm used for compression.
-   * @param encoding         encoding type used nn
+   * @param encoding         encoding type used
    */
   public EncodedDataBlock(DataBlockEncoder dataBlockEncoder, DataBlockEncoding encoding,
     byte[] rawKVs, HFileContext meta) {
@@ -174,7 +174,7 @@ public class EncodedDataBlock {
    * @param inputBuffer Array to be compressed.
    * @param offset      Offset to beginning of the data.
    * @param length      Length to be compressed.
-   * @return Size of compressed data in bytes. n
+   * @return Size of compressed data in bytes.
    */
   @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "NP_NULL_ON_SOME_PATH_EXCEPTION",
       justification = "No sure what findbugs wants but looks to me like no NPE")
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDecodingContext.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDecodingContext.java
index 6835a8bac3c..63f173c38cc 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDecodingContext.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/encoding/HFileBlockDecodingContext.java
@@ -32,9 +32,9 @@ public interface HFileBlockDecodingContext {
   /**
    * Perform all actions that need to be done before the encoder's real decoding process.
    * Decompression needs to be done if {@link HFileContext#getCompression()} returns a valid
-   * compression algorithm. n * numBytes after block and encoding headers n * numBytes without
-   * header required to store the block after decompressing (not decoding) n * ByteBuffer pointed
-   * after the header but before the data n * on disk data to be decoded
+   * compression algorithm. numBytes after block and encoding headers numBytes without header
+   * required to store the block after decompressing (not decoding) ByteBuffer pointed after the
+   * header but before the data on disk data to be decoded
    */
   void prepareDecoding(int onDiskSizeWithoutHeader, int uncompressedSizeWithoutHeader,
     ByteBuff blockBufferWithoutHeader, ByteBuff onDiskBlock) throws IOException;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hadoopbackport/ThrottledInputStream.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hadoopbackport/ThrottledInputStream.java
index 375a7a06232..a8bb90d4be7 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hadoopbackport/ThrottledInputStream.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/hadoopbackport/ThrottledInputStream.java
@@ -93,7 +93,8 @@ public class ThrottledInputStream extends InputStream {
 
   /**
    * Read bytes starting from the specified position. This requires rawStream is an instance of
-   * {@link PositionedReadable}. nnnn * @return the number of bytes read
+   * {@link PositionedReadable}.
+   * @return the number of bytes read
    */
   public int read(long position, byte[] buffer, int offset, int length) throws IOException {
     if (!(rawStream instanceof PositionedReadable)) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/Dictionary.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/Dictionary.java
index 157df98a9b0..b1ab8a9b28d 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/Dictionary.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/Dictionary.java
@@ -80,7 +80,7 @@ public interface Dictionary {
    * @param data   the data to be written in byte[]
    * @param offset the offset
    * @param length length to be written
-   * @param dict   the dictionary whose contents are to written n
+   * @param dict   the dictionary whose contents are to written
    */
   public static void write(OutputStream out, byte[] data, int offset, int length, Dictionary dict)
     throws IOException {
@@ -103,7 +103,7 @@ public interface Dictionary {
    * @param data   the data to be written in ByteBuffer
    * @param offset the offset
    * @param length length to be written
-   * @param dict   the dictionary whose contents are to written n
+   * @param dict   the dictionary whose contents are to written
    */
   public static void write(OutputStream out, ByteBuffer data, int offset, int length,
     Dictionary dict) throws IOException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/StreamUtils.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/StreamUtils.java
index 7cfa007478f..97e1e9d3345 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/StreamUtils.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/io/util/StreamUtils.java
@@ -118,8 +118,8 @@ public class StreamUtils {
   }
 
   /**
-   * Reads a varInt value stored in an array. n * Input array where the varInt is available n *
-   * Offset in the input array where varInt is available
+   * Reads a varInt value stored in an array. Input array where the varInt is available Offset in
+   * the input array where varInt is available
    * @return A pair of integers in which first value is the actual decoded varInt value and second
    *         value as number of bytes taken by this varInt for it's storage in the input array.
    * @throws IOException When varint is malformed and not able to be read correctly
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/ByteBuff.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/ByteBuff.java
index 2285917364f..8035bf38bbb 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/ByteBuff.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/ByteBuff.java
@@ -84,7 +84,8 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
   public abstract int position();
 
   /**
-   * Sets this ByteBuff's position to the given value. n * @return this object
+   * Sets this ByteBuff's position to the given value.
+   * @return this object
    */
   public abstract ByteBuff position(int position);
 
@@ -110,7 +111,8 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
   public abstract int limit();
 
   /**
-   * Marks the limit of this ByteBuff. n * @return This ByteBuff
+   * Marks the limit of this ByteBuff.
+   * @return This ByteBuff
    */
   public abstract ByteBuff limit(int limit);
 
@@ -200,32 +202,34 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
   public abstract byte get();
 
   /**
-   * Fetches the byte at the given index. Does not change position of the underlying ByteBuffers n
-   * * @return the byte at the given index
+   * Fetches the byte at the given index. Does not change position of the underlying ByteBuffers
+   * @return the byte at the given index
    */
   public abstract byte get(int index);
 
   /**
    * Fetches the byte at the given offset from current position. Does not change position of the
-   * underlying ByteBuffers. n * @return the byte value at the given index.
+   * underlying ByteBuffers.
+   * @return the byte value at the given index.
    */
   public abstract byte getByteAfterPosition(int offset);
 
   /**
-   * Writes a byte to this ByteBuff at the current position and increments the position n * @return
-   * this object
+   * Writes a byte to this ByteBuff at the current position and increments the position
+   * @return this object
    */
   public abstract ByteBuff put(byte b);
 
   /**
-   * Writes a byte to this ByteBuff at the given index nn * @return this object
+   * Writes a byte to this ByteBuff at the given index
+   * @return this object
    */
   public abstract ByteBuff put(int index, byte b);
 
   /**
    * Copies the specified number of bytes from this ByteBuff's current position to the byte[]'s
-   * offset. Also advances the position of the ByteBuff by the given length. n * @param offset
-   * within the current array
+   * offset. Also advances the position of the ByteBuff by the given length.
+   * @param offset within the current array
    * @param length upto which the bytes to be copied
    */
   public abstract void get(byte[] dst, int offset, int length);
@@ -242,20 +246,22 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
 
   /**
    * Copies the content from this ByteBuff's current position to the byte array and fills it. Also
-   * advances the position of the ByteBuff by the length of the byte[]. n
+   * advances the position of the ByteBuff by the length of the byte[].
    */
   public abstract void get(byte[] dst);
 
   /**
-   * Copies from the given byte[] to this ByteBuff n * @param offset the position in the byte array
-   * from which the copy should be done
+   * Copies from the given byte[] to this ByteBuff
+   * @param offset the position in the byte array from which the copy should be done
    * @param length the length upto which the copy should happen
    * @return this ByteBuff
    */
   public abstract ByteBuff put(byte[] src, int offset, int length);
 
   /**
-   * Copies from the given byte[] to this ByteBuff n * @return this ByteBuff
+   * Copies from the given byte[] to this ByteBuff
+   * @param src source byte array
+   * @return this ByteBuff
    */
   public abstract ByteBuff put(byte[] src);
 
@@ -279,14 +285,15 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
    * Fetches the short value at the given index. Does not change position of the underlying
    * ByteBuffers. The caller is sure that the index will be after the current position of this
    * ByteBuff. So even if the current short does not fit in the current item we can safely move to
-   * the next item and fetch the remaining bytes forming the short n * @return the short value at
-   * the given index
+   * the next item and fetch the remaining bytes forming the short
+   * @return the short value at the given index
    */
   public abstract short getShort(int index);
 
   /**
    * Fetches the short value at the given offset from current position. Does not change position of
-   * the underlying ByteBuffers. n * @return the short value at the given index.
+   * the underlying ByteBuffers.
+   * @return the short value at the given index.
    */
   public abstract short getShortAfterPosition(int offset);
 
@@ -307,13 +314,15 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
   /**
    * Fetches the int at the given index. Does not change position of the underlying ByteBuffers.
    * Even if the current int does not fit in the current item we can safely move to the next item
-   * and fetch the remaining bytes forming the int n * @return the int value at the given index
+   * and fetch the remaining bytes forming the int
+   * @return the int value at the given index
    */
   public abstract int getInt(int index);
 
   /**
    * Fetches the int value at the given offset from current position. Does not change position of
-   * the underlying ByteBuffers. n * @return the int value at the given index.
+   * the underlying ByteBuffers.
+   * @return the int value at the given index.
    */
   public abstract int getIntAfterPosition(int offset);
 
@@ -335,13 +344,15 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
    * Fetches the long at the given index. Does not change position of the underlying ByteBuffers.
    * The caller is sure that the index will be after the current position of this ByteBuff. So even
    * if the current long does not fit in the current item we can safely move to the next item and
-   * fetch the remaining bytes forming the long n * @return the long value at the given index
+   * fetch the remaining bytes forming the long
+   * @return the long value at the given index
    */
   public abstract long getLong(int index);
 
   /**
    * Fetches the long value at the given offset from current position. Does not change position of
-   * the underlying ByteBuffers. n * @return the long value at the given index.
+   * the underlying ByteBuffers.
+   * @return the long value at the given index.
    */
   public abstract long getLongAfterPosition(int offset);
 
@@ -354,8 +365,8 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
   }
 
   /**
-   * Copy the content from this ByteBuff to a byte[] based on the given offset and length n * the
-   * position from where the copy should start n * the length upto which the copy has to be done
+   * Copy the content from this ByteBuff to a byte[] based on the given offset and length the
+   * position from where the copy should start the length upto which the copy has to be done
    * @return byte[] with the copied contents from this ByteBuff.
    */
   public abstract byte[] toBytes(int offset, int length);
@@ -380,8 +391,8 @@ public abstract class ByteBuff implements HBaseReferenceCounted {
   public abstract ByteBuff put(int offset, ByteBuff src, int srcOffset, int length);
 
   /**
-   * Reads bytes from the given channel into this ByteBuff n * @return The number of bytes read from
-   * the channel n
+   * Reads bytes from the given channel into this ByteBuff
+   * @return The number of bytes read from the channel
    */
   public abstract int read(ReadableByteChannel channel) throws IOException;
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java
index 042b21f6c00..106b398ae95 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/nio/MultiByteBuff.java
@@ -149,8 +149,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Fetches the byte at the given index. Does not change position of the underlying ByteBuffers n
-   * * @return the byte at the given index
+   * Fetches the byte at the given index. Does not change position of the underlying ByteBuffers
+   * @return the byte at the given index
    */
   @Override
   public byte get(int index) {
@@ -201,8 +201,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Fetches the int at the given index. Does not change position of the underlying ByteBuffers n
-   * * @return the int value at the given index
+   * Fetches the int at the given index. Does not change position of the underlying ByteBuffers
+   * @return the int value at the given index
    */
   @Override
   public int getInt(int index) {
@@ -235,8 +235,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Fetches the short at the given index. Does not change position of the underlying ByteBuffers n
-   * * @return the short value at the given index
+   * Fetches the short at the given index. Does not change position of the underlying ByteBuffers
+   * @return the short value at the given index
    */
   @Override
   public short getShort(int index) {
@@ -347,8 +347,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Fetches the long at the given index. Does not change position of the underlying ByteBuffers n
-   * * @return the long value at the given index
+   * Fetches the long at the given index. Does not change position of the underlying ByteBuffers
+   * @return the long value at the given index
    */
   @Override
   public long getLong(int index) {
@@ -388,7 +388,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Sets this MBB's position to the given value. n * @return this object
+   * Sets this MBB's position to the given value.
+   * @return this object
    */
   @Override
   public MultiByteBuff position(int position) {
@@ -569,7 +570,7 @@ public class MultiByteBuff extends ByteBuff {
 
   /**
    * Copies the content from this MBB's current position to the byte array and fills it. Also
-   * advances the position of the MBB by the length of the byte[]. n
+   * advances the position of the MBB by the length of the byte[].
    */
   @Override
   public void get(byte[] dst) {
@@ -578,8 +579,8 @@ public class MultiByteBuff extends ByteBuff {
 
   /**
    * Copies the specified number of bytes from this MBB's current position to the byte[]'s offset.
-   * Also advances the position of the MBB by the given length. n * @param offset within the current
-   * array
+   * Also advances the position of the MBB by the given length.
+   * @param offset within the current array
    * @param length upto which the bytes to be copied
    */
   @Override
@@ -617,7 +618,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Marks the limit of this MBB. n * @return This MBB
+   * Marks the limit of this MBB.
+   * @return This MBB
    */
   @Override
   public MultiByteBuff limit(int limit) {
@@ -688,8 +690,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Writes a byte to this MBB at the current position and increments the position n * @return this
-   * object
+   * Writes a byte to this MBB at the current position and increments the position
+   * @return this object
    */
   @Override
   public MultiByteBuff put(byte b) {
@@ -882,7 +884,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Copies from the given byte[] to this MBB n * @return this MBB
+   * Copies from the given byte[] to this MBB
+   * @return this MBB
    */
   @Override
   public final MultiByteBuff put(byte[] src) {
@@ -890,8 +893,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Copies from the given byte[] to this MBB n * @param offset the position in the byte array from
-   * which the copy should be done
+   * Copies from the given byte[] to this MBB
+   * @param offset the position in the byte array from which the copy should be done
    * @param length the length upto which the copy should happen
    * @return this MBB
    */
@@ -969,7 +972,7 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Jumps the current position of this MBB by specified length. n
+   * Jumps the current position of this MBB by specified length.
    */
   @Override
   public MultiByteBuff skip(int length) {
@@ -991,7 +994,7 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Jumps back the current position of this MBB by specified length. n
+   * Jumps back the current position of this MBB by specified length.
    */
   @Override
   public MultiByteBuff moveBack(int length) {
@@ -1118,8 +1121,8 @@ public class MultiByteBuff extends ByteBuff {
   }
 
   /**
-   * Copy the content from this MBB to a byte[] based on the given offset and length n * the
-   * position from where the copy should start n * the length upto which the copy has to be done
+   * Copy the content from this MBB to a byte[] based on the given offset and length the position
+   * from where the copy should start the length upto which the copy has to be done
    * @return byte[] with the copied contents from this MBB.
    */
   @Override
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/security/User.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/security/User.java
index e7d37069ac5..9714c962e12 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/security/User.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/security/User.java
@@ -167,7 +167,8 @@ public abstract class User {
   }
 
   /**
-   * Executes the given action as the login user n * @return the result of the action n
+   * Executes the given action as the login user
+   * @return the result of the action
    */
   @SuppressWarnings({ "rawtypes", "unchecked" })
   public static <T> T runAsLoginUser(PrivilegedExceptionAction<T> action) throws IOException {
@@ -183,7 +184,7 @@ public abstract class User {
 
   /**
    * Wraps an underlying {@code UserGroupInformation} instance.
-   * @param ugi The base Hadoop user n
+   * @param ugi The base Hadoop user
    */
   public static User create(UserGroupInformation ugi) {
     if (ugi == null) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/security/UserProvider.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/security/UserProvider.java
index f6766bd1f3c..fd88fb19308 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/security/UserProvider.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/security/UserProvider.java
@@ -181,7 +181,7 @@ public class UserProvider extends BaseConfigurable {
 
   /**
    * Wraps an underlying {@code UserGroupInformation} instance.
-   * @param ugi The base Hadoop user n
+   * @param ugi The base Hadoop user
    */
   public User create(UserGroupInformation ugi) {
     if (ugi == null) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/AbstractPositionedByteRange.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/AbstractPositionedByteRange.java
index 179074ef00c..88ee9c9666a 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/AbstractPositionedByteRange.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/AbstractPositionedByteRange.java
@@ -69,7 +69,7 @@ public abstract class AbstractPositionedByteRange extends AbstractByteRange
 
   /**
    * Update the beginning of this range. {@code offset + length} may not be greater than
-   * {@code bytes.length}. Resets {@code position} to 0. n * the new start of this range.
+   * {@code bytes.length}. Resets {@code position} to 0. the new start of this range.
    * @return this.
    */
   @Override
@@ -82,7 +82,7 @@ public abstract class AbstractPositionedByteRange extends AbstractByteRange
   /**
    * Update the length of this range. {@code offset + length} should not be greater than
    * {@code bytes.length}. If {@code position} is greater than the new {@code length}, sets
-   * {@code position} to {@code length}. n * The new length of this range.
+   * {@code position} to {@code length}. The new length of this range.
    * @return this.
    */
   @Override
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java
index d502bf7bb8d..6c92ac1aac4 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java
@@ -573,7 +573,7 @@ public final class ByteBufferUtils {
 
   /**
    * Read integer from stream coded in 7 bits and increment position.
-   * @return the integer that has been read n
+   * @return the integer that has been read
    */
   public static int readCompressedInt(InputStream input) throws IOException {
     int result = 0;
@@ -606,7 +606,7 @@ public final class ByteBufferUtils {
   /**
    * Read long which was written to fitInBytes bytes and increment position.
    * @param fitInBytes In how many bytes given long is stored.
-   * @return The value of parsed long. n
+   * @return The value of parsed long.
    */
   public static long readLong(InputStream in, final int fitInBytes) throws IOException {
     long tmpLong = 0;
@@ -684,7 +684,7 @@ public final class ByteBufferUtils {
 
   /**
    * Copy from one buffer to another from given offset. This will be absolute positional copying and
-   * won't affect the position of any of the buffers. nnnnn
+   * won't affect the position of any of the buffers.
    */
   public static void copyFromBufferToBuffer(ByteBuffer in, ByteBuffer out, int sourceOffset,
     int destinationOffset, int length) {
@@ -854,8 +854,8 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * Copy the given number of bytes from specified offset into a new byte[] nnn * @return a new
-   * byte[] containing the bytes in the specified range
+   * Copy the given number of bytes from specified offset into a new byte[]
+   * @return a new byte[] containing the bytes in the specified range
    */
   public static byte[] toBytes(ByteBuffer buffer, int offset, int length) {
     byte[] output = new byte[length];
@@ -878,7 +878,7 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * n * ByteBuffer to hash n * offset to start from n * length to hash
+   * ByteBuffer to hash offset to start from length to hash
    */
   public static int hashCode(ByteBuffer buf, int offset, int length) {
     int hash = 1;
@@ -960,7 +960,8 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * Reads a short value at the given buffer's offset. nn * @return short value at offset
+   * Reads a short value at the given buffer's offset.
+   * @return short value at offset
    */
   public static short toShort(ByteBuffer buffer, int offset) {
     return ConverterHolder.BEST_CONVERTER.toShort(buffer, offset);
@@ -974,7 +975,8 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * Reads an int value at the given buffer's offset. nn * @return int value at offset
+   * Reads an int value at the given buffer's offset.
+   * @return int value at offset
    */
   public static int toInt(ByteBuffer buffer, int offset) {
     return ConverterHolder.BEST_CONVERTER.toInt(buffer, offset);
@@ -985,7 +987,7 @@ public final class ByteBufferUtils {
    * @param buf    The ByteBuffer
    * @param offset Offset to int value
    * @param length Number of bytes used to store the int value.
-   * @return the int value n * if there's not enough bytes left in the buffer after the given offset
+   * @return the int value if there's not enough bytes left in the buffer after the given offset
    */
   public static int readAsInt(ByteBuffer buf, int offset, final int length) {
     if (offset + length > buf.limit()) {
@@ -1001,7 +1003,8 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * Reads a long value at the given buffer's offset. nn * @return long value at offset
+   * Reads a long value at the given buffer's offset.
+   * @return long value at offset
    */
   public static long toLong(ByteBuffer buffer, int offset) {
     return ConverterHolder.BEST_CONVERTER.toLong(buffer, offset);
@@ -1022,7 +1025,8 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * Reads a double value at the given buffer's offset. n * @param offset offset where double is
+   * Reads a double value at the given buffer's offset.
+   * @param offset offset where double is
    * @return double value at offset
    */
   public static double toDouble(ByteBuffer buffer, int offset) {
@@ -1030,7 +1034,8 @@ public final class ByteBufferUtils {
   }
 
   /**
-   * Reads a BigDecimal value at the given buffer's offset. nn * @return BigDecimal value at offset
+   * Reads a BigDecimal value at the given buffer's offset.
+   * @return BigDecimal value at offset
    */
   public static BigDecimal toBigDecimal(ByteBuffer buffer, int offset, int length) {
     if (buffer == null || length < Bytes.SIZEOF_INT + 1 || (offset + length > buffer.limit())) {
@@ -1081,7 +1086,6 @@ public final class ByteBufferUtils {
   /**
    * Copies the bytes from given array's offset to length part into the given buffer. Puts the bytes
    * to buffer's current position. This also advances the position in the 'out' buffer by 'length'
-   * nnnn
    */
   public static void copyFromArrayToBuffer(ByteBuffer out, byte[] in, int inOffset, int length) {
     if (out.hasArray()) {
@@ -1099,7 +1103,7 @@ public final class ByteBufferUtils {
 
   /**
    * Copies bytes from given array's offset to length part into the given buffer. Puts the bytes to
-   * buffer's given position. This doesn't affact the position of buffer. nnnn
+   * buffer's given position. This doesn't affact the position of buffer.
    */
   public static void copyFromArrayToBuffer(ByteBuffer out, int outOffset, byte[] in, int inOffset,
     int length) {
@@ -1116,7 +1120,7 @@ public final class ByteBufferUtils {
 
   /**
    * Copies specified number of bytes from given offset of 'in' ByteBuffer to the array. This
-   * doesn't affact the position of buffer. nnnnn
+   * doesn't affact the position of buffer.
    */
   public static void copyFromBufferToArray(byte[] out, ByteBuffer in, int sourceOffset,
     int destinationOffset, int length) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteRange.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteRange.java
index 64bd5cb3b6c..4addf9057e2 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteRange.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteRange.java
@@ -63,14 +63,13 @@ public interface ByteRange extends Comparable<ByteRange> {
 
   /**
    * Nullifies this ByteRange. That is, it becomes a husk, being a range over no byte[] whatsoever.
-   * n
    */
   public ByteRange unset();
 
   /**
    * Reuse this {@code ByteRange} over a new byte[]. {@code offset} is set to 0 and {@code length}
    * is set to {@code capacity}.
-   * @param capacity the size of a new byte[]. n
+   * @param capacity the size of a new byte[].
    */
   public ByteRange set(int capacity);
 
@@ -78,7 +77,7 @@ public interface ByteRange extends Comparable<ByteRange> {
    * Reuse this {@code ByteRange} over a new byte[]. {@code offset} is set to 0 and {@code length}
    * is set to {@code bytes.length}. A null {@code bytes} IS supported, in which case this method
    * will behave equivalently to {@link #unset()}.
-   * @param bytes the array to wrap. n
+   * @param bytes the array to wrap.
    */
   public ByteRange set(byte[] bytes);
 
@@ -188,21 +187,21 @@ public interface ByteRange extends Comparable<ByteRange> {
   /**
    * Store the short value at {@code index}
    * @param index the index in the range where {@code val} is stored
-   * @param val   the value to store n
+   * @param val   the value to store
    */
   public ByteRange putShort(int index, short val);
 
   /**
    * Store the int value at {@code index}
    * @param index the index in the range where {@code val} is stored
-   * @param val   the value to store n
+   * @param val   the value to store
    */
   public ByteRange putInt(int index, int val);
 
   /**
    * Store the long value at {@code index}
    * @param index the index in the range where {@code val} is stored
-   * @param val   the value to store n
+   * @param val   the value to store
    */
   public ByteRange putLong(int index, long val);
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
index 1955aecf433..6c83d70d19b 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
@@ -207,7 +207,7 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * @param b Use passed bytes as backing array for this instance. nn
+   * @param b Use passed bytes as backing array for this instance.
    */
   public void set(final byte[] b, final int offset, final int length) {
     this.bytes = b;
@@ -240,8 +240,7 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * n
-   */
+   *   */
   public int getOffset() {
     return this.offset;
   }
@@ -272,8 +271,9 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * Compares the bytes in this object to the specified byte array n * @return Positive if left is
-   * bigger than right, 0 if they are equal, and negative if left is smaller than right.
+   * Compares the bytes in this object to the specified byte array
+   * @return Positive if left is bigger than right, 0 if they are equal, and negative if left is
+   *         smaller than right.
    */
   public int compareTo(final byte[] that) {
     return BYTES_RAWCOMPARATOR.compare(this.bytes, this.offset, this.length, that, 0, that.length);
@@ -589,7 +589,8 @@ public class Bytes implements Comparable<Bytes> {
 
   /**
    * Write a printable representation of a byte array.
-   * @param b byte array n * @see #toStringBinary(byte[], int, int)
+   * @param b byte array
+   * @see #toStringBinary(byte[], int, int)
    */
   public static String toStringBinary(final byte[] b) {
     if (b == null) return "null";
@@ -1143,7 +1144,8 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * Convert a BigDecimal value to a byte array n * @return the byte array
+   * Convert a BigDecimal value to a byte array
+   * @return the byte array
    */
   public static byte[] toBytes(BigDecimal val) {
     byte[] valueBytes = val.unscaledValue().toByteArray();
@@ -1154,14 +1156,16 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * Converts a byte array to a BigDecimal n * @return the char value
+   * Converts a byte array to a BigDecimal
+   * @return the char value
    */
   public static BigDecimal toBigDecimal(byte[] bytes) {
     return toBigDecimal(bytes, 0, bytes.length);
   }
 
   /**
-   * Converts a byte array to a BigDecimal value nnn * @return the char value
+   * Converts a byte array to a BigDecimal value
+   * @return the char value
    */
   public static BigDecimal toBigDecimal(byte[] bytes, int offset, final int length) {
     if (bytes == null || length < SIZEOF_INT + 1 || (offset + length > bytes.length)) {
@@ -2244,7 +2248,7 @@ public class Bytes implements Comparable<Bytes> {
    * Copy the byte array given in parameter and return an instance of a new byte array with the same
    * length and the same content.
    * @param bytes the byte array to copy from
-   * @return a copy of the given designated byte array nn
+   * @return a copy of the given designated byte array
    */
   public static byte[] copy(byte[] bytes, final int offset, final int length) {
     if (bytes == null) return null;
@@ -2423,7 +2427,7 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * Fill given array with zeros at the specified position. nnn
+   * Fill given array with zeros at the specified position.
    */
   public static void zero(byte[] b, int offset, int length) {
     checkPositionIndex(offset, b.length, "offset");
@@ -2506,7 +2510,8 @@ public class Bytes implements Comparable<Bytes> {
   }
 
   /**
-   * Create a byte array which is multiple given bytes nn * @return byte array
+   * Create a byte array which is multiple given bytes
+   * @return byte array
    */
   public static byte[] multiple(byte[] srcBytes, int multiNum) {
     if (multiNum <= 0) {
@@ -2561,7 +2566,7 @@ public class Bytes implements Comparable<Bytes> {
 
   /**
    * Create a byte array from a string of hash digits. The length of the string must be a multiple
-   * of 2 n
+   * of 2
    */
   public static byte[] fromHex(String hex) {
     checkArgument(hex.length() % 2 == 0, "length must be a multiple of 2");
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ChecksumType.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ChecksumType.java
index d943803fb2f..dc810834a66 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ChecksumType.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/ChecksumType.java
@@ -85,8 +85,8 @@ public enum ChecksumType {
   }
 
   /**
-   * Cannot rely on enum ordinals . They change if item is removed or moved. Do our own codes. n
-   * * @return Type associated with passed code.
+   * Cannot rely on enum ordinals . They change if item is removed or moved. Do our own codes.
+   * @return Type associated with passed code.
    */
   public static ChecksumType codeToType(final byte b) {
     for (ChecksumType t : ChecksumType.values()) {
@@ -98,8 +98,8 @@ public enum ChecksumType {
   }
 
   /**
-   * Map a checksum name to a specific type. Do our own names. n * @return Type associated with
-   * passed code.
+   * Map a checksum name to a specific type. Do our own names.
+   * @return Type associated with passed code.
    */
   public static ChecksumType nameToType(final String name) {
     for (ChecksumType t : ChecksumType.values()) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Classes.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Classes.java
index 84e70873727..1b3eef180a5 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Classes.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Classes.java
@@ -27,10 +27,9 @@ public class Classes {
 
   /**
    * Equivalent of {@link Class#forName(String)} which also returns classes for primitives like
-   * <code>boolean</code>, etc. n * The name of the class to retrieve. Can be either a normal class
-   * or a primitive class.
-   * @return The class specified by <code>className</code> n * If the requested class can not be
-   *         found.
+   * <code>boolean</code>, etc. The name of the class to retrieve. Can be either a normal class or a
+   * primitive class.
+   * @return The class specified by <code>className</code> If the requested class can not be found.
    */
   public static Class<?> extendedForName(String className) throws ClassNotFoundException {
     Class<?> valueType;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CommonFSUtils.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CommonFSUtils.java
index fb33e6d6897..e9047cd2c2f 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CommonFSUtils.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CommonFSUtils.java
@@ -330,7 +330,7 @@ public final class CommonFSUtils {
    * Returns the URI in the string format
    * @param c configuration
    * @param p path
-   * @return - the URI's to string format n
+   * @return - the URI's to string format
    */
   public static String getDirUri(final Configuration c, Path p) throws IOException {
     if (p.toUri().getScheme() != null) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CoprocessorClassLoader.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CoprocessorClassLoader.java
index bfd96adb8db..d2a6fce9d19 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CoprocessorClassLoader.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/CoprocessorClassLoader.java
@@ -215,7 +215,7 @@ public class CoprocessorClassLoader extends ClassLoaderBase {
    * @param parent     the parent class loader for exempted classes
    * @param pathPrefix a prefix used in temp path name to store the jar file locally
    * @param conf       the configuration used to create the class loader, if needed
-   * @return a CoprocessorClassLoader for the coprocessor jar path n
+   * @return a CoprocessorClassLoader for the coprocessor jar path
    */
   public static CoprocessorClassLoader getClassLoader(final Path path, final ClassLoader parent,
     final String pathPrefix, final Configuration conf) throws IOException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/HashKey.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/HashKey.java
index e4e89f7711f..642afe43932 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/HashKey.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/HashKey.java
@@ -31,9 +31,7 @@ public abstract class HashKey<T> {
     this.t = t;
   }
 
-  /**
-   * n * @return The byte at the given position in this HashKey
-   */
+  /** Returns The byte at the given position in this HashKey */
   public abstract byte get(int pos);
 
   /** Returns The number of bytes in this HashKey */
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/KeyLocker.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/KeyLocker.java
index 276e436ed13..0cd1b41c502 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/KeyLocker.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/KeyLocker.java
@@ -58,7 +58,7 @@ public class KeyLocker<K> {
     }, NB_CONCURRENT_LOCKS);
 
   /**
-   * Return a lock for the given key. The lock is already locked. n
+   * Return a lock for the given key. The lock is already locked.
    */
   public ReentrantLock acquireLock(K key) {
     if (key == null) throw new IllegalArgumentException("key must not be null");
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/MD5Hash.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/MD5Hash.java
index 8202c96b289..ee6b715db1f 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/MD5Hash.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/MD5Hash.java
@@ -32,8 +32,8 @@ public class MD5Hash {
   private static final Logger LOG = LoggerFactory.getLogger(MD5Hash.class);
 
   /**
-   * Given a byte array, returns in MD5 hash as a hex string. n * @return SHA1 hash as a 32
-   * character hex string.
+   * Given a byte array, returns in MD5 hash as a hex string.
+   * @return SHA1 hash as a 32 character hex string.
    */
   public static String getMD5AsHex(byte[] key) {
     return getMD5AsHex(key, 0, key.length);
@@ -42,8 +42,8 @@ public class MD5Hash {
   /**
    * Given a byte array, returns its MD5 hash as a hex string. Only "length" number of bytes
    * starting at "offset" within the byte array are used.
-   * @param key the key to hash (variable length byte array) nn * @return MD5 hash as a 32 character
-   *            hex string.
+   * @param key the key to hash (variable length byte array)
+   * @return MD5 hash as a 32 character hex string.
    */
   public static String getMD5AsHex(byte[] key, int offset, int length) {
     try {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Pair.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Pair.java
index 2d55d572ff6..01986e64233 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Pair.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Pair.java
@@ -76,14 +76,14 @@ public class Pair<T1, T2> implements Serializable {
   }
 
   /**
-   * Return the first element stored in the pair. n
+   * Return the first element stored in the pair.
    */
   public T1 getFirst() {
     return first;
   }
 
   /**
-   * Return the second element stored in the pair. n
+   * Return the second element stored in the pair.
    */
   public T2 getSecond() {
     return second;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PairOfSameType.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PairOfSameType.java
index 745bd759c76..759f3da4409 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PairOfSameType.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PairOfSameType.java
@@ -43,14 +43,14 @@ public class PairOfSameType<T> implements Iterable<T> {
   }
 
   /**
-   * Return the first element stored in the pair. n
+   * Return the first element stored in the pair.
    */
   public T getFirst() {
     return first;
   }
 
   /**
-   * Return the second element stored in the pair. n
+   * Return the second element stored in the pair.
    */
   public T getSecond() {
     return second;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PositionedByteRange.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PositionedByteRange.java
index efa52612be6..cb61cfbe246 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PositionedByteRange.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PositionedByteRange.java
@@ -156,12 +156,12 @@ public interface PositionedByteRange extends ByteRange {
   public PositionedByteRange put(byte[] val, int offset, int length);
 
   /**
-   * Limits the byte range upto a specified value. Limit cannot be greater than capacity nn
+   * Limits the byte range upto a specified value. Limit cannot be greater than capacity
    */
   public PositionedByteRange setLimit(int limit);
 
   /**
-   * Return the current limit n
+   * Return the current limit
    */
   public int getLimit();
 
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PrettyPrinter.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PrettyPrinter.java
index ce168dc60c9..d5b3f894a7f 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PrettyPrinter.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/PrettyPrinter.java
@@ -69,8 +69,8 @@ public final class PrettyPrinter {
 
   /**
    * Convert a human readable string to its value.
-   * @see org.apache.hadoop.hbase.util.PrettyPrinter#format(String, Unit) nn * @return the value
-   *      corresponding to the human readable string
+   * @see org.apache.hadoop.hbase.util.PrettyPrinter#format(String, Unit)
+   * @return the value corresponding to the human readable string
    */
   public static String valueOf(final String pretty, final Unit unit) throws HBaseException {
     StringBuilder value = new StringBuilder();
@@ -144,7 +144,8 @@ public final class PrettyPrinter {
    * Convert a human readable time interval to seconds. Examples of the human readable time
    * intervals are: 50 DAYS 1 HOUR 30 MINUTES , 25000 SECONDS etc. The units of time specified can
    * be in uppercase as well as lowercase. Also, if a single number is specified without any time
-   * unit, it is assumed to be in seconds. n * @return value in seconds
+   * unit, it is assumed to be in seconds.
+   * @return value in seconds
    */
   private static long humanReadableIntervalToSec(final String humanReadableInterval)
     throws HBaseException {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimpleMutableByteRange.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimpleMutableByteRange.java
index 24b9f2d997b..868c731e0a8 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimpleMutableByteRange.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimpleMutableByteRange.java
@@ -66,22 +66,22 @@ public class SimpleMutableByteRange extends AbstractByteRange {
 
   /**
    * Create a new {@code ByteRange} over a new backing array of size {@code capacity}. The range's
-   * offset and length are 0 and {@code capacity}, respectively. n * the size of the backing array.
+   * offset and length are 0 and {@code capacity}, respectively. the size of the backing array.
    */
   public SimpleMutableByteRange(int capacity) {
     this(new byte[capacity]);
   }
 
   /**
-   * Create a new {@code ByteRange} over the provided {@code bytes}. n * The array to wrap.
+   * Create a new {@code ByteRange} over the provided {@code bytes}. The array to wrap.
    */
   public SimpleMutableByteRange(byte[] bytes) {
     set(bytes);
   }
 
   /**
-   * Create a new {@code ByteRange} over the provided {@code bytes}. n * The array to wrap. n * The
-   * offset into {@code bytes} considered the beginning of this range. n * The length of this range.
+   * Create a new {@code ByteRange} over the provided {@code bytes}. The array to wrap. The offset
+   * into {@code bytes} considered the beginning of this range. The length of this range.
    */
   public SimpleMutableByteRange(byte[] bytes, int offset, int length) {
     set(bytes, offset, length);
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimplePositionedMutableByteRange.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimplePositionedMutableByteRange.java
index d91fd712f37..68e99c3053b 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimplePositionedMutableByteRange.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/SimplePositionedMutableByteRange.java
@@ -70,7 +70,7 @@ public class SimplePositionedMutableByteRange extends AbstractPositionedByteRang
 
   /**
    * Create a new {@code PositionedByteRange} over a new backing array of size {@code capacity}. The
-   * range's offset and length are 0 and {@code capacity}, respectively. n * the size of the backing
+   * range's offset and length are 0 and {@code capacity}, respectively. the size of the backing
    * array.
    */
   public SimplePositionedMutableByteRange(int capacity) {
@@ -78,17 +78,15 @@ public class SimplePositionedMutableByteRange extends AbstractPositionedByteRang
   }
 
   /**
-   * Create a new {@code PositionedByteRange} over the provided {@code bytes}. n * The array to
-   * wrap.
+   * Create a new {@code PositionedByteRange} over the provided {@code bytes}. The array to wrap.
    */
   public SimplePositionedMutableByteRange(byte[] bytes) {
     set(bytes);
   }
 
   /**
-   * Create a new {@code PositionedByteRange} over the provided {@code bytes}. n * The array to
-   * wrap. n * The offset into {@code bytes} considered the beginning of this range. n * The length
-   * of this range.
+   * Create a new {@code PositionedByteRange} over the provided {@code bytes}. The array to wrap.
+   * The offset into {@code bytes} considered the beginning of this range. The length of this range.
    */
   public SimplePositionedMutableByteRange(byte[] bytes, int offset, int length) {
     set(bytes, offset, length);
@@ -130,7 +128,7 @@ public class SimplePositionedMutableByteRange extends AbstractPositionedByteRang
 
   /**
    * Update the beginning of this range. {@code offset + length} may not be greater than
-   * {@code bytes.length}. Resets {@code position} to 0. n * the new start of this range.
+   * {@code bytes.length}. Resets {@code position} to 0. the new start of this range.
    * @return this.
    */
   @Override
@@ -143,7 +141,7 @@ public class SimplePositionedMutableByteRange extends AbstractPositionedByteRang
   /**
    * Update the length of this range. {@code offset + length} should not be greater than
    * {@code bytes.length}. If {@code position} is greater than the new {@code length}, sets
-   * {@code position} to {@code length}. n * The new length of this range.
+   * {@code position} to {@code length}. The new length of this range.
    * @return this.
    */
   @Override
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Threads.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Threads.java
index 3fb1a0896fa..b1162fdc992 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Threads.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/Threads.java
@@ -110,7 +110,7 @@ public class Threads {
   }
 
   /**
-   * @param t Waits on the passed thread to die dumping a threaddump every minute while its up. n
+   * @param t Waits on the passed thread to die dumping a threaddump every minute while its up.
    */
   public static void threadDumpingIsAlive(final Thread t) throws InterruptedException {
     if (t == null) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/TimeMeasurable.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/TimeMeasurable.java
index 0caecf649ce..e23c62045fa 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/TimeMeasurable.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/TimeMeasurable.java
@@ -27,7 +27,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface TimeMeasurable<T> {
 
   /**
-   * Measure elapsed time. n
+   * Measure elapsed time.
    */
   T measure();
 }
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java
index 40bd7baa4b2..a483fd326b6 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/UnsafeAccess.java
@@ -193,7 +193,7 @@ public final class UnsafeAccess {
 
   /**
    * Reads a int value at the given Object's offset considering it was written in big-endian format.
-   * nn * @return int value at offset
+   * @return int value at offset
    */
   public static int toInt(Object ref, long offset) {
     if (LITTLE_ENDIAN) {
@@ -295,7 +295,7 @@ public final class UnsafeAccess {
 
   // APIs to copy data. This will be direct memory location copy and will be much faster
   /**
-   * Copies the bytes from given array's offset to length part into the given buffer. nnnnn
+   * Copies the bytes from given array's offset to length part into the given buffer.
    */
   public static void copy(byte[] src, int srcOffset, ByteBuffer dest, int destOffset, int length) {
     long destAddress = destOffset;
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/WindowMovingAverage.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/WindowMovingAverage.java
index b79924a352c..1fe83ad6438 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/util/WindowMovingAverage.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/util/WindowMovingAverage.java
@@ -73,7 +73,7 @@ public class WindowMovingAverage extends MovingAverage {
 
   /**
    * Get statistics at index.
-   * @param index index of bar n
+   * @param index index of bar
    */
   protected long getStatisticsAtIndex(int index) {
     if (index < 0 || index >= getNumberOfStatistics()) {
diff --git a/hbase-common/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKConfig.java b/hbase-common/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKConfig.java
index fc152be962c..6eb87a93628 100644
--- a/hbase-common/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKConfig.java
+++ b/hbase-common/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKConfig.java
@@ -102,8 +102,8 @@ public final class ZKConfig {
   }
 
   /**
-   * Return the ZK Quorum servers string given the specified configuration n * @return Quorum
-   * servers String
+   * Return the ZK Quorum servers string given the specified configuration
+   * @return Quorum servers String
    */
   private static String getZKQuorumServersStringFromHbaseConfig(Configuration conf) {
     String defaultClientPort = Integer.toString(
@@ -165,8 +165,8 @@ public final class ZKConfig {
 
   /**
    * Separate the given key into the three configurations it should contain: hbase.zookeeper.quorum,
-   * hbase.zookeeper.client.port and zookeeper.znode.parent n * @return the three configuration in
-   * the described order n
+   * hbase.zookeeper.client.port and zookeeper.znode.parent
+   * @return the three configuration in the described order
    */
   public static ZKClusterKey transformClusterKey(String key) throws IOException {
     String[] parts = key.split(":");
diff --git a/hbase-common/src/test/java/org/apache/hadoop/hbase/TestHBaseConfiguration.java b/hbase-common/src/test/java/org/apache/hadoop/hbase/TestHBaseConfiguration.java
index 37c6831bfca..51698559218 100644
--- a/hbase-common/src/test/java/org/apache/hadoop/hbase/TestHBaseConfiguration.java
+++ b/hbase-common/src/test/java/org/apache/hadoop/hbase/TestHBaseConfiguration.java
@@ -249,7 +249,7 @@ public class TestHBaseConfiguration {
     }
 
     /**
-     * Wrapper to fetch the configured {@code List<CredentialProvider>}s. n * Configuration with
+     * Wrapper to fetch the configured {@code List<CredentialProvider>}s. Configuration with
      * GENERAL_SECURITY_CREDENTIAL_PROVIDER_PATHS defined
      * @return List of CredentialProviders, or null if they could not be loaded
      */
@@ -274,8 +274,8 @@ public class TestHBaseConfiguration {
 
     /**
      * Create a CredentialEntry using the configured Providers. If multiple CredentialProviders are
-     * configured, the first will be used. n * Configuration for the CredentialProvider n *
-     * CredentialEntry name (alias) n * The credential
+     * configured, the first will be used. Configuration for the CredentialProvider CredentialEntry
+     * name (alias) The credential
      */
     public void createEntry(Configuration conf, String name, char[] credential) throws Exception {
       if (!isHadoopCredentialProviderAvailable()) {
@@ -294,8 +294,8 @@ public class TestHBaseConfiguration {
 
     /**
      * Create a CredentialEntry with the give name and credential in the credentialProvider. The
-     * credentialProvider argument must be an instance of Hadoop CredentialProvider. n * Instance of
-     * CredentialProvider n * CredentialEntry name (alias) n * The credential to store
+     * credentialProvider argument must be an instance of Hadoop CredentialProvider. Instance of
+     * CredentialProvider CredentialEntry name (alias) The credential to store
      */
     private void createEntryInProvider(Object credentialProvider, String name, char[] credential)
       throws Exception {
diff --git a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerSource.java b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerSource.java
index 2bb72bef1ae..56b92056a02 100644
--- a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerSource.java
+++ b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerSource.java
@@ -54,7 +54,7 @@ public interface MetricsRegionServerSource extends BaseSource, JvmPauseMonitorSo
   void updatePut(long t);
 
   /**
-   * Update the PutBatch time histogram if a batch contains a Put op n
+   * Update the PutBatch time histogram if a batch contains a Put op
    */
   void updatePutBatch(long t);
 
diff --git a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/rest/MetricsRESTSource.java b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/rest/MetricsRESTSource.java
index 1de3a34bfeb..05f967731a5 100644
--- a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/rest/MetricsRESTSource.java
+++ b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/rest/MetricsRESTSource.java
@@ -80,7 +80,7 @@ public interface MetricsRESTSource extends BaseSource, JvmPauseMonitorSource {
   void incrementSucessfulPutRequests(int inc);
 
   /**
-   * Increment the number of successful Delete requests. n
+   * Increment the number of successful Delete requests.
    */
   void incrementSucessfulDeleteRequests(int inc);
 
diff --git a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/thrift/MetricsThriftServerSource.java b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/thrift/MetricsThriftServerSource.java
index 214626204e7..3d938bdd539 100644
--- a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/thrift/MetricsThriftServerSource.java
+++ b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/hbase/thrift/MetricsThriftServerSource.java
@@ -36,7 +36,7 @@ public interface MetricsThriftServerSource extends ExceptionTrackingSource, JvmP
   String ACTIVE_WORKER_COUNT_KEY = "numActiveWorkers";
 
   /**
-   * Add how long an operation was in the queue. n
+   * Add how long an operation was in the queue.
    */
   void incTimeInQueue(long time);
 
diff --git a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/MetricHistogram.java b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/MetricHistogram.java
index 66d5e3d87a4..0581d431ebf 100644
--- a/hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/MetricHistogram.java
+++ b/hbase-hadoop-compat/src/main/java/org/apache/hadoop/metrics2/MetricHistogram.java
@@ -41,7 +41,7 @@ public interface MetricHistogram {
   String NINETY_NINE_POINT_NINETH_PERCENTILE_METRIC_NAME = "_99.9th_percentile";
 
   /**
-   * Add a single value to a histogram's stream of values. n
+   * Add a single value to a histogram's stream of values.
    */
   void add(long value);
 
diff --git a/hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/util/MetricSampleQuantiles.java b/hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/util/MetricSampleQuantiles.java
index cf01b099bb8..d4cc4ba6f4d 100644
--- a/hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/util/MetricSampleQuantiles.java
+++ b/hbase-hadoop2-compat/src/main/java/org/apache/hadoop/metrics2/util/MetricSampleQuantiles.java
@@ -67,7 +67,7 @@ public class MetricSampleQuantiles {
   /**
    * Specifies the allowable error for this rank, depending on which quantiles are being targeted.
    * This is the f(r_i, n) function from the CKMS paper. It's basically how wide the range of this
-   * rank can be. n * the index in the list of samples
+   * rank can be. the index in the list of samples
    */
   private double allowableError(int rank) {
     int size = samples.size();
@@ -207,7 +207,7 @@ public class MetricSampleQuantiles {
 
   /**
    * Get a snapshot of the current values of all the tracked quantiles.
-   * @return snapshot of the tracked quantiles n * if no items have been added to the estimator
+   * @return snapshot of the tracked quantiles if no items have been added to the estimator
    */
   synchronized public Map<MetricQuantile, Long> snapshot() throws IOException {
     // flush the buffer first for best results
diff --git a/hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java b/hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java
index 8b4890fa54a..b7d10444675 100644
--- a/hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java
+++ b/hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java
@@ -239,10 +239,10 @@ public class HttpServer implements FilterContainer {
     private int port = -1;
 
     /**
-     * Add an endpoint that the HTTP server should listen to. n * the endpoint of that the HTTP
-     * server should listen to. The scheme specifies the protocol (i.e. HTTP / HTTPS), the host
-     * specifies the binding address, and the port specifies the listening port. Unspecified or zero
-     * port means that the server can listen to any port.
+     * Add an endpoint that the HTTP server should listen to. the endpoint of that the HTTP server
+     * should listen to. The scheme specifies the protocol (i.e. HTTP / HTTPS), the host specifies
+     * the binding address, and the port specifies the listening port. Unspecified or zero port
+     * means that the server can listen to any port.
      */
     public Builder addEndpoint(URI endpoint) {
       endpoints.add(endpoint);
diff --git a/hbase-http/src/main/java/org/apache/hadoop/hbase/http/ProxyUserAuthenticationFilter.java b/hbase-http/src/main/java/org/apache/hadoop/hbase/http/ProxyUserAuthenticationFilter.java
index c8456a461bb..494a30c3e77 100644
--- a/hbase-http/src/main/java/org/apache/hadoop/hbase/http/ProxyUserAuthenticationFilter.java
+++ b/hbase-http/src/main/java/org/apache/hadoop/hbase/http/ProxyUserAuthenticationFilter.java
@@ -141,7 +141,7 @@ public class ProxyUserAuthenticationFilter extends AuthenticationFilter {
 
   /**
    * The purpose of this function is to get the doAs parameter of a http request case insensitively
-   * n * @return doAs parameter if exists or null otherwise
+   * @return doAs parameter if exists or null otherwise
    */
   public static String getDoasFromHeader(final HttpServletRequest request) {
     String doas = null;
diff --git a/hbase-http/src/main/java/org/apache/hadoop/hbase/http/jmx/JMXJsonServlet.java b/hbase-http/src/main/java/org/apache/hadoop/hbase/http/jmx/JMXJsonServlet.java
index c68250e8d94..d6dfbc2173d 100644
--- a/hbase-http/src/main/java/org/apache/hadoop/hbase/http/jmx/JMXJsonServlet.java
+++ b/hbase-http/src/main/java/org/apache/hadoop/hbase/http/jmx/JMXJsonServlet.java
@@ -142,8 +142,8 @@ public class JMXJsonServlet extends HttpServlet {
   }
 
   /**
-   * Process a GET request for the specified resource. n * The servlet request we are processing n *
-   * The servlet response we are creating
+   * Process a GET request for the specified resource. The servlet request we are processing The
+   * servlet response we are creating
    */
   @Override
   public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
diff --git a/hbase-http/src/main/java/org/apache/hadoop/hbase/util/JSONMetricUtil.java b/hbase-http/src/main/java/org/apache/hadoop/hbase/util/JSONMetricUtil.java
index 760f4c0a2b0..1c5387fdaf8 100644
--- a/hbase-http/src/main/java/org/apache/hadoop/hbase/util/JSONMetricUtil.java
+++ b/hbase-http/src/main/java/org/apache/hadoop/hbase/util/JSONMetricUtil.java
@@ -109,7 +109,7 @@ public final class JSONMetricUtil {
    * Method for building map used for constructing ObjectName. Mapping is done with arrays indices
    * @param keys   Map keys
    * @param values Map values
-   * @return Map or null if arrays are empty * or have different number of elements
+   * @return Map or null if arrays are empty or have different number of elements
    */
   public static Hashtable<String, String> buldKeyValueTable(String[] keys, String[] values) {
     if (keys.length != values.length) {
diff --git a/hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestHttpServerLifecycle.java b/hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestHttpServerLifecycle.java
index e517a5ffedb..c0bfbb4e56b 100644
--- a/hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestHttpServerLifecycle.java
+++ b/hbase-http/src/test/java/org/apache/hadoop/hbase/http/TestHttpServerLifecycle.java
@@ -120,7 +120,7 @@ public class TestHttpServerLifecycle extends HttpServerFunctionalTest {
   }
 
   /**
-   * Test that the server is alive once started n * on failure
+   * Test that the server is alive once started on failure
    */
   @Ignore("Hangs on occasion; see HBASE-14430")
   @Test
diff --git a/hbase-it/src/test/java/org/apache/hadoop/hbase/DistributedHBaseCluster.java b/hbase-it/src/test/java/org/apache/hadoop/hbase/DistributedHBaseCluster.java
index 40fd27a27c9..556cd216d34 100644
--- a/hbase-it/src/test/java/org/apache/hadoop/hbase/DistributedHBaseCluster.java
+++ b/hbase-it/src/test/java/org/apache/hadoop/hbase/DistributedHBaseCluster.java
@@ -76,7 +76,7 @@ public class DistributedHBaseCluster extends HBaseCluster {
   }
 
   /**
-   * Returns a ClusterStatus for this HBase cluster n
+   * Returns a ClusterStatus for this HBase cluster
    */
   @Override
   public ClusterMetrics getClusterMetrics() throws IOException {
diff --git a/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java b/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java
index 89439101deb..a5d3d75555d 100644
--- a/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java
+++ b/hbase-it/src/test/java/org/apache/hadoop/hbase/mapreduce/IntegrationTestBulkLoad.java
@@ -669,7 +669,7 @@ public class IntegrationTestBulkLoad extends IntegrationTestBase {
   }
 
   /**
-   * After adding data to the table start a mr job to nnn
+   * After adding data to the table start a mr job to
    */
   private void runCheck() throws IOException, ClassNotFoundException, InterruptedException {
     LOG.info("Running check");
diff --git a/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.java b/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.java
index 798f6d66fac..4356f06a131 100644
--- a/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.java
+++ b/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestBigLinkedList.java
@@ -1147,8 +1147,8 @@ public class IntegrationTestBigLinkedList extends IntegrationTestBase {
       }
 
       /**
-       * nn * @return Return new byte array that has <code>ordinal</code> as prefix on front taking
-       * up Bytes.SIZEOF_SHORT bytes followed by <code>r</code>
+       * Returns new byte array that has <code>ordinal</code> as prefix on front taking up
+       * Bytes.SIZEOF_SHORT bytes followed by <code>r</code>
        */
       public static byte[] addPrefixFlag(final int ordinal, final byte[] r) {
         byte[] prefix = Bytes.toBytes((short) ordinal);
@@ -1162,7 +1162,7 @@ public class IntegrationTestBigLinkedList extends IntegrationTestBase {
       }
 
       /**
-       * n * @return Type from the Counts enum of this row. Reads prefix added by
+       * Returns type from the Counts enum of this row. Reads prefix added by
        * {@link #addPrefixFlag(int, byte[])}
        */
       public static Counts whichType(final byte[] bs) {
@@ -1170,9 +1170,7 @@ public class IntegrationTestBigLinkedList extends IntegrationTestBase {
         return Counts.values()[ordinal];
       }
 
-      /**
-       * n * @return Row bytes minus the type flag.
-       */
+      /** Returns Row bytes minus the type flag. */
       public static byte[] getRowOnly(BytesWritable bw) {
         byte[] bytes = new byte[bw.getLength() - Bytes.SIZEOF_SHORT];
         System.arraycopy(bw.getBytes(), Bytes.SIZEOF_SHORT, bytes, 0, bytes.length);
@@ -1261,7 +1259,7 @@ public class IntegrationTestBigLinkedList extends IntegrationTestBase {
 
       /**
        * Dump out extra info around references if there are any. Helps debugging.
-       * @return StringBuilder filled with references if any. n
+       * @return StringBuilder filled with references if any.
        */
       private StringBuilder dumpExtraInfoOnRefs(final BytesWritable key, final Context context,
         final List<byte[]> refs) throws IOException {
@@ -1412,8 +1410,8 @@ public class IntegrationTestBigLinkedList extends IntegrationTestBase {
     }
 
     /**
-     * Verify the values in the Counters against the expected number of entries written. n *
-     * Expected number of referenced entrires n * The Job's Counters object
+     * Verify the values in the Counters against the expected number of entries written. Expected
+     * number of referenced entrires The Job's Counters object
      * @return True if the values match what's expected, false otherwise
      */
     protected boolean verifyExpectedValues(long expectedReferenced, Counters counters) {
@@ -1441,7 +1439,7 @@ public class IntegrationTestBigLinkedList extends IntegrationTestBase {
 
     /**
      * Verify that the Counters don't contain values which indicate an outright failure from the
-     * Reducers. n * The Job's counters
+     * Reducers. The Job's counters
      * @return True if the "bad" counter objects are 0, false otherwise
      */
     protected boolean verifyUnexpectedValues(Counters counters) {
diff --git a/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestReplication.java b/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestReplication.java
index 740a22f0f4d..7cd7ed15342 100644
--- a/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestReplication.java
+++ b/hbase-it/src/test/java/org/apache/hadoop/hbase/test/IntegrationTestReplication.java
@@ -171,7 +171,7 @@ public class IntegrationTestReplication extends IntegrationTestBigLinkedList {
     /**
      * This tears down any tables that existed from before and rebuilds the tables and schemas on
      * the source cluster. It then sets up replication from the source to the sink cluster by using
-     * the {@link org.apache.hadoop.hbase.client.replication.ReplicationAdmin} connection. n
+     * the {@link org.apache.hadoop.hbase.client.replication.ReplicationAdmin} connection.
      */
     protected void setupTablesAndReplication() throws Exception {
       TableName tableName = getTableName(source.getConfiguration());
@@ -247,7 +247,7 @@ public class IntegrationTestReplication extends IntegrationTestBigLinkedList {
 
     /**
      * Run the {@link org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList.Generator} in the
-     * source cluster. This assumes that the tables have been setup via setupTablesAndReplication. n
+     * source cluster. This assumes that the tables have been setup via setupTablesAndReplication.
      */
     protected void runGenerator() throws Exception {
       Path outputPath = new Path(outputDir);
@@ -268,7 +268,7 @@ public class IntegrationTestReplication extends IntegrationTestBigLinkedList {
      * Run the {@link org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList.Verify} in the sink
      * cluster. If replication is working properly the data written at the source cluster should be
      * available in the sink cluster after a reasonable gap
-     * @param expectedNumNodes the number of nodes we are expecting to see in the sink cluster n
+     * @param expectedNumNodes the number of nodes we are expecting to see in the sink cluster
      */
     protected void runVerify(long expectedNumNodes) throws Exception {
       Path outputPath = new Path(outputDir);
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/Driver.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/Driver.java
index 60e24be5128..63dc0bb28c8 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/Driver.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/Driver.java
@@ -36,9 +36,6 @@ public class Driver {
     pgd = pgd0;
   }
 
-  /**
-   * nn
-   */
   public static void main(String[] args) throws Throwable {
     pgd.addClass(RowCounter.NAME, RowCounter.class, "Count rows in HBase table");
     ProgramDriver.class.getMethod("driver", new Class[] { String[].class }).invoke(pgd,
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/GroupingTableMap.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/GroupingTableMap.java
index 3d609ffd73b..58d8f49839f 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/GroupingTableMap.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/GroupingTableMap.java
@@ -74,7 +74,7 @@ public class GroupingTableMap extends MapReduceBase
 
   /**
    * Extract the grouping columns from value to construct a new key. Pass the new key and value to
-   * reduce. If any of the grouping columns are not found in the value, the record is skipped. nnnnn
+   * reduce. If any of the grouping columns are not found in the value, the record is skipped.
    */
   public void map(ImmutableBytesWritable key, Result value,
     OutputCollector<ImmutableBytesWritable, Result> output, Reporter reporter) throws IOException {
@@ -88,8 +88,8 @@ public class GroupingTableMap extends MapReduceBase
 
   /**
    * Extract columns values from the current record. This method returns null if any of the columns
-   * are not found. Override this method if you want to deal with nulls differently. n * @return
-   * array of byte values
+   * are not found. Override this method if you want to deal with nulls differently.
+   * @return array of byte values
    */
   protected byte[][] extractKeyValues(Result r) {
     byte[][] keyVals = null;
@@ -115,8 +115,8 @@ public class GroupingTableMap extends MapReduceBase
 
   /**
    * Create a key by concatenating multiple column values. Override this function in order to
-   * produce different types of keys. n * @return key generated by concatenating multiple column
-   * values
+   * produce different types of keys.
+   * @return key generated by concatenating multiple column values
    */
   protected ImmutableBytesWritable createGroupKey(byte[][] vals) {
     if (vals == null) {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableMap.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableMap.java
index 16256942d72..8af0b4b4749 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableMap.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableMap.java
@@ -53,7 +53,7 @@ public class IdentityTableMap extends MapReduceBase
   }
 
   /**
-   * Pass the key, value to reduce nnnnn
+   * Pass the key, value to reduce
    */
   public void map(ImmutableBytesWritable key, Result value,
     OutputCollector<ImmutableBytesWritable, Result> output, Reporter reporter) throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableReduce.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableReduce.java
index 79d5f3dc8c0..29f9478da10 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableReduce.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/IdentityTableReduce.java
@@ -38,7 +38,7 @@ public class IdentityTableReduce extends MapReduceBase
   private static final Logger LOG = LoggerFactory.getLogger(IdentityTableReduce.class.getName());
 
   /**
-   * No aggregation, output pairs of (key, record) nnnnn
+   * No aggregation, output pairs of (key, record)
    */
   public void reduce(ImmutableBytesWritable key, Iterator<Put> values,
     OutputCollector<ImmutableBytesWritable, Put> output, Reporter reporter) throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/MultiTableSnapshotInputFormat.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/MultiTableSnapshotInputFormat.java
index 24e9da0f28d..0e9f0deaf67 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/MultiTableSnapshotInputFormat.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/MultiTableSnapshotInputFormat.java
@@ -105,7 +105,6 @@ public class MultiTableSnapshotInputFormat extends TableSnapshotInputFormat
    * restoreDir. Sets:
    * {@link org.apache.hadoop.hbase.mapreduce.MultiTableSnapshotInputFormatImpl#RESTORE_DIRS_KEY},
    * {@link org.apache.hadoop.hbase.mapreduce.MultiTableSnapshotInputFormatImpl#SNAPSHOT_TO_SCANS_KEY}
-   * nnnn
    */
   public static void setInput(Configuration conf, Map<String, Collection<Scan>> snapshotScans,
     Path restoreDir) throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/RowCounter.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/RowCounter.java
index 4f95950589c..2f6324a7ac5 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/RowCounter.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/RowCounter.java
@@ -65,9 +65,7 @@ public class RowCounter extends Configured implements Tool {
     }
   }
 
-  /**
-   * n * @return the JobConf n
-   */
+  /** Returns the JobConf */
   public JobConf createSubmittableJob(String[] args) throws IOException {
     JobConf c = new JobConf(getConf(), getClass());
     c.setJobName(NAME);
@@ -104,9 +102,6 @@ public class RowCounter extends Configured implements Tool {
     return 0;
   }
 
-  /**
-   * nn
-   */
   public static void main(String[] args) throws Exception {
     int errCode = ToolRunner.run(HBaseConfiguration.create(), new RowCounter(), args);
     System.exit(errCode);
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableInputFormatBase.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableInputFormatBase.java
index 34736bd6a3d..667629016d3 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableInputFormatBase.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableInputFormatBase.java
@@ -210,7 +210,7 @@ public abstract class TableInputFormatBase implements InputFormat<ImmutableBytes
   /**
    * Allows subclasses to initialize the table information.
    * @param connection The Connection to the HBase cluster. MUST be unmanaged. We will close.
-   * @param tableName  The {@link TableName} of the table to process. n
+   * @param tableName  The {@link TableName} of the table to process.
    */
   protected void initializeTable(Connection connection, TableName tableName) throws IOException {
     if (this.table != null || this.connection != null) {
@@ -240,7 +240,7 @@ public abstract class TableInputFormatBase implements InputFormat<ImmutableBytes
   }
 
   /**
-   * Allows subclasses to set the {@link TableRecordReader}. n * to provide other
+   * Allows subclasses to set the {@link TableRecordReader}. to provide other
    * {@link TableRecordReader} implementations.
    */
   protected void setTableRecordReader(TableRecordReader tableRecordReader) {
@@ -248,7 +248,7 @@ public abstract class TableInputFormatBase implements InputFormat<ImmutableBytes
   }
 
   /**
-   * Allows subclasses to set the {@link Filter} to be used. n
+   * Allows subclasses to set the {@link Filter} to be used.
    */
   protected void setRowFilter(Filter rowFilter) {
     this.rowFilter = rowFilter;
@@ -272,7 +272,7 @@ public abstract class TableInputFormatBase implements InputFormat<ImmutableBytes
 
   /**
    * Close the Table and related objects that were initialized via
-   * {@link #initializeTable(Connection, TableName)}. n
+   * {@link #initializeTable(Connection, TableName)}.
    */
   protected void closeTable() throws IOException {
     close(table, connection);
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableOutputFormat.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableOutputFormat.java
index 270aeb186a4..0f217ad5801 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableOutputFormat.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableOutputFormat.java
@@ -105,7 +105,8 @@ public class TableOutputFormat extends FileOutputFormat<ImmutableBytesWritable,
    * Failure to do so will drop writes.
    * @param ignored Ignored filesystem
    * @param job     Current JobConf
-   * @param name    Name of the job n * @return The newly created writer instance.
+   * @param name    Name of the job
+   * @return The newly created writer instance.
    * @throws IOException When creating the writer fails.
    */
   @Override
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReader.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReader.java
index e8765c44854..414403534a9 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReader.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReader.java
@@ -34,14 +34,14 @@ public class TableRecordReader implements RecordReader<ImmutableBytesWritable, R
   private TableRecordReaderImpl recordReaderImpl = new TableRecordReaderImpl();
 
   /**
-   * Restart from survivable exceptions by creating a new scanner. nn
+   * Restart from survivable exceptions by creating a new scanner.
    */
   public void restart(byte[] firstRow) throws IOException {
     this.recordReaderImpl.restart(firstRow);
   }
 
   /**
-   * Build the scanner. Not done in constructor to allow for extension. n
+   * Build the scanner. Not done in constructor to allow for extension.
    */
   public void init() throws IOException {
     this.recordReaderImpl.restart(this.recordReaderImpl.getStartRow());
@@ -82,26 +82,28 @@ public class TableRecordReader implements RecordReader<ImmutableBytesWritable, R
     this.recordReaderImpl.setRowFilter(rowFilter);
   }
 
+  @Override
   public void close() {
     this.recordReaderImpl.close();
   }
 
   /**
-   * n *
    * @see org.apache.hadoop.mapred.RecordReader#createKey()
    */
+  @Override
   public ImmutableBytesWritable createKey() {
     return this.recordReaderImpl.createKey();
   }
 
   /**
-   * n *
    * @see org.apache.hadoop.mapred.RecordReader#createValue()
    */
+  @Override
   public Result createValue() {
     return this.recordReaderImpl.createValue();
   }
 
+  @Override
   public long getPos() {
 
     // This should be the ordinal tuple in the range;
@@ -109,6 +111,7 @@ public class TableRecordReader implements RecordReader<ImmutableBytesWritable, R
     return this.recordReaderImpl.getPos();
   }
 
+  @Override
   public float getProgress() {
     // Depends on the total number of tuples and getPos
     return this.recordReaderImpl.getPos();
@@ -117,8 +120,9 @@ public class TableRecordReader implements RecordReader<ImmutableBytesWritable, R
   /**
    * @param key   HStoreKey as input key.
    * @param value MapWritable as input value
-   * @return true if there was more data n
+   * @return true if there was more data
    */
+  @Override
   public boolean next(ImmutableBytesWritable key, Result value) throws IOException {
     return this.recordReaderImpl.next(key, value);
   }
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java
index 4d2131467c0..2b0f6d4458c 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java
@@ -153,7 +153,6 @@ public class TableRecordReaderImpl {
   }
 
   /**
-   * n *
    * @see org.apache.hadoop.mapred.RecordReader#createKey()
    */
   public ImmutableBytesWritable createKey() {
@@ -161,7 +160,6 @@ public class TableRecordReaderImpl {
   }
 
   /**
-   * n *
    * @see org.apache.hadoop.mapred.RecordReader#createValue()
    */
   public Result createValue() {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableSplit.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableSplit.java
index 2cb63ba7a6a..0bcb559ae3c 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableSplit.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapred/TableSplit.java
@@ -43,7 +43,7 @@ public class TableSplit implements InputSplit, Comparable<TableSplit> {
   }
 
   /**
-   * Constructor nnnn
+   * Constructor
    */
   public TableSplit(TableName tableName, byte[] startRow, byte[] endRow, final String location) {
     this.m_tableName = tableName;
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CellCreator.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CellCreator.java
index a48ba49058a..8d12fe5d720 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CellCreator.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/CellCreator.java
@@ -59,7 +59,7 @@ public class CellCreator {
    * @param value     column value
    * @param voffset   value offset
    * @param vlength   value length
-   * @return created Cell n
+   * @return created Cell
    */
   public Cell create(byte[] row, int roffset, int rlength, byte[] family, int foffset, int flength,
     byte[] qualifier, int qoffset, int qlength, long timestamp, byte[] value, int voffset,
@@ -83,7 +83,8 @@ public class CellCreator {
    * @param voffset       value offset
    * @param vlength       value length
    * @param visExpression visibility expression to be associated with cell
-   * @return created Cell n * @deprecated since 0.98.9
+   * @return created Cell
+   * @deprecated since 0.98.9
    * @see <a href="https://issues.apache.org/jira/browse/HBASE-10560">HBASE-10560</a>
    */
   @Deprecated
@@ -111,7 +112,8 @@ public class CellCreator {
    * @param timestamp version timestamp
    * @param value     column value
    * @param voffset   value offset
-   * @param vlength   value length n * @return created Cell n
+   * @param vlength   value length
+   * @return created Cell
    */
   public Cell create(byte[] row, int roffset, int rlength, byte[] family, int foffset, int flength,
     byte[] qualifier, int qoffset, int qlength, long timestamp, byte[] value, int voffset,
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HashTable.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HashTable.java
index e09e7be98eb..ccbd826c91d 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HashTable.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HashTable.java
@@ -330,7 +330,7 @@ public class HashTable extends Configured implements Tool {
     }
 
     /**
-     * Open a TableHash.Reader starting at the first hash at or after the given key. n
+     * Open a TableHash.Reader starting at the first hash at or after the given key.
      */
     public Reader newReader(Configuration conf, ImmutableBytesWritable startKey)
       throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/ImportTsv.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/ImportTsv.java
index fd30f8fa7ef..2c1a2ddae24 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/ImportTsv.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/ImportTsv.java
@@ -147,7 +147,7 @@ public class ImportTsv extends Configured implements Tool {
 
     /**
      * @param columnsSpecification the list of columns to parser out, comma separated. The row key
-     *                             should be the special token TsvParser.ROWKEY_COLUMN_SPEC n
+     *                             should be the special token TsvParser.ROWKEY_COLUMN_SPEC
      */
     public TsvParser(String columnsSpecification, String separatorStr) {
       // Configure separator
@@ -415,8 +415,8 @@ public class ImportTsv extends Configured implements Tool {
     }
 
     /**
-     * Return starting position and length of row key from the specified line bytes. nn * @return
-     * Pair of row key offset and length. n
+     * Return starting position and length of row key from the specified line bytes.
+     * @return Pair of row key offset and length.
      */
     public Pair<Integer, Integer> parseRowKey(byte[] lineBytes, int length)
       throws BadTsvLineException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableHFileOutputFormat.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableHFileOutputFormat.java
index fb42e332833..ef3179830f9 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableHFileOutputFormat.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableHFileOutputFormat.java
@@ -72,7 +72,7 @@ public class MultiTableHFileOutputFormat extends HFileOutputFormat2 {
    * function will configure the requisite number of reducers to write HFiles for multple tables
    * simultaneously
    * @param job                   See {@link org.apache.hadoop.mapreduce.Job}
-   * @param multiTableDescriptors Table descriptor and region locator pairs n
+   * @param multiTableDescriptors Table descriptor and region locator pairs
    */
   public static void configureIncrementalLoad(Job job, List<TableInfo> multiTableDescriptors)
     throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableOutputFormat.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableOutputFormat.java
index 5a5d1149755..35c12672dea 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableOutputFormat.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableOutputFormat.java
@@ -76,8 +76,8 @@ public class MultiTableOutputFormat extends OutputFormat<ImmutableBytesWritable,
     boolean useWriteAheadLogging;
 
     /**
-     * n * HBaseConfiguration to used n * whether to use write ahead logging. This can be turned off
-     * ( <tt>false</tt>) to improve performance when bulk loading data.
+     * HBaseConfiguration to used whether to use write ahead logging. This can be turned off (
+     * <tt>false</tt>) to improve performance when bulk loading data.
      */
     public MultiTableRecordWriter(Configuration conf, boolean useWriteAheadLogging)
       throws IOException {
@@ -88,8 +88,8 @@ public class MultiTableOutputFormat extends OutputFormat<ImmutableBytesWritable,
     }
 
     /**
-     * n * the name of the table, as a string
-     * @return the named mutator n * if there is a problem opening a table
+     * the name of the table, as a string
+     * @return the named mutator if there is a problem opening a table
      */
     BufferedMutator getBufferedMutator(ImmutableBytesWritable tableName) throws IOException {
       if (this.connection == null) {
@@ -115,8 +115,8 @@ public class MultiTableOutputFormat extends OutputFormat<ImmutableBytesWritable,
     }
 
     /**
-     * Writes an action (Put or Delete) to the specified table. n * the table being updated. n * the
-     * update, either a put or a delete. n * if the action is not a put or a delete.
+     * Writes an action (Put or Delete) to the specified table. the table being updated. the update,
+     * either a put or a delete. if the action is not a put or a delete.
      */
     @Override
     public void write(ImmutableBytesWritable tableName, Mutation action) throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableSnapshotInputFormatImpl.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableSnapshotInputFormatImpl.java
index 93dac05101c..7fdd68c3ad8 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableSnapshotInputFormatImpl.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/MultiTableSnapshotInputFormatImpl.java
@@ -78,7 +78,7 @@ public class MultiTableSnapshotInputFormatImpl {
    * Return the list of splits extracted from the scans/snapshots pushed to conf by
    * {@link #setInput(Configuration, Map, Path)}
    * @param conf Configuration to determine splits from
-   * @return Return the list of splits extracted from the scans/snapshots pushed to conf n
+   * @return Return the list of splits extracted from the scans/snapshots pushed to conf
    */
   public List<TableSnapshotInputFormatImpl.InputSplit> getSplits(Configuration conf)
     throws IOException {
@@ -112,7 +112,7 @@ public class MultiTableSnapshotInputFormatImpl {
    * Retrieve the snapshot name -&gt; list&lt;scan&gt; mapping pushed to configuration by
    * {@link #setSnapshotToScans(Configuration, Map)}
    * @param conf Configuration to extract name -&gt; list&lt;scan&gt; mappings from.
-   * @return the snapshot name -&gt; list&lt;scan&gt; mapping pushed to configuration n
+   * @return the snapshot name -&gt; list&lt;scan&gt; mapping pushed to configuration
    */
   public Map<String, Collection<Scan>> getSnapshotsToScans(Configuration conf) throws IOException {
 
@@ -136,7 +136,7 @@ public class MultiTableSnapshotInputFormatImpl {
   }
 
   /**
-   * Push snapshotScans to conf (under the key {@link #SNAPSHOT_TO_SCANS_KEY}) nnn
+   * Push snapshotScans to conf (under the key {@link #SNAPSHOT_TO_SCANS_KEY})
    */
   public void setSnapshotToScans(Configuration conf, Map<String, Collection<Scan>> snapshotScans)
     throws IOException {
@@ -161,7 +161,7 @@ public class MultiTableSnapshotInputFormatImpl {
    * Retrieve the directories into which snapshots have been restored from
    * ({@link #RESTORE_DIRS_KEY})
    * @param conf Configuration to extract restore directories from
-   * @return the directories into which snapshots have been restored from n
+   * @return the directories into which snapshots have been restored from
    */
   public Map<String, Path> getSnapshotDirs(Configuration conf) throws IOException {
     List<Map.Entry<String, String>> kvps = ConfigurationUtil.getKeyValues(conf, RESTORE_DIRS_KEY);
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/RowCounter.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/RowCounter.java
index 6258399472d..6d163e82e8c 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/RowCounter.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/RowCounter.java
@@ -248,7 +248,7 @@ public class RowCounter extends AbstractHBaseTool {
    * Sets filter {@link FilterBase} to the {@link Scan} instance. If provided rowRangeList contains
    * more than one element, method sets filter which is instance of {@link MultiRowRangeFilter}.
    * Otherwise, method sets filter which is instance of {@link FirstKeyOnlyFilter}. If rowRangeList
-   * contains exactly one element, startRow and stopRow are set to the scan. nn
+   * contains exactly one element, startRow and stopRow are set to the scan.
    */
   private static void setScanFilter(Scan scan, List<MultiRowRangeFilter.RowRange> rowRangeList) {
     final int size = rowRangeList == null ? 0 : rowRangeList.size();
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java
index da796e12738..b02517451bc 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.java
@@ -362,8 +362,7 @@ public abstract class TableInputFormatBase extends InputFormat<ImmutableBytesWri
    * @param split A TableSplit corresponding to a range of rowkeys
    * @param n     Number of ranges after splitting. Pass 1 means no split for the range Pass 2 if
    *              you want to split the range in two;
-   * @return A list of TableSplit, the size of the list is n
-   * @throws IllegalArgumentIOException throws IllegalArgumentIOException
+   * @return A list of TableSplit, the size of the list is {@code n}
    */
   protected List<InputSplit> createNInputSplitsUniform(InputSplit split, int n)
     throws IllegalArgumentIOException {
@@ -581,7 +580,7 @@ public abstract class TableInputFormatBase extends InputFormat<ImmutableBytesWri
   /**
    * Allows subclasses to initialize the table information.
    * @param connection The Connection to the HBase cluster. MUST be unmanaged. We will close.
-   * @param tableName  The {@link TableName} of the table to process. n
+   * @param tableName  The {@link TableName} of the table to process.
    */
   protected void initializeTable(Connection connection, TableName tableName) throws IOException {
     if (this.table != null || this.connection != null) {
@@ -642,7 +641,7 @@ public abstract class TableInputFormatBase extends InputFormat<ImmutableBytesWri
 
   /**
    * Close the Table and related objects that were initialized via
-   * {@link #initializeTable(Connection, TableName)}. n
+   * {@link #initializeTable(Connection, TableName)}.
    */
   protected void closeTable() throws IOException {
     close(admin, table, regionLocator, connection);
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableMapReduceUtil.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableMapReduceUtil.java
index ddcb6d573af..076d282c0d0 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableMapReduceUtil.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableMapReduceUtil.java
@@ -848,7 +848,7 @@ public class TableMapReduceUtil {
    * @param my_class        the class to find.
    * @param fs              the FileSystem with which to qualify the returned path.
    * @param packagedClasses a map of class name to path.
-   * @return a jar file that contains the class. n
+   * @return a jar file that contains the class.
    */
   private static Path findOrCreateJar(Class<?> my_class, FileSystem fs,
     Map<String, String> packagedClasses) throws IOException {
@@ -897,7 +897,7 @@ public class TableMapReduceUtil {
    * that is not the first thing on the class path that has a class with the same name. Looks first
    * on the classpath and then in the <code>packagedClasses</code> map.
    * @param my_class the class to find.
-   * @return a jar file that contains the class, or null. n
+   * @return a jar file that contains the class, or null.
    */
   private static String findContainingJar(Class<?> my_class, Map<String, String> packagedClasses)
     throws IOException {
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableOutputFormat.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableOutputFormat.java
index e8316c5016f..17c6c0e4551 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableOutputFormat.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableOutputFormat.java
@@ -90,7 +90,8 @@ public class TableOutputFormat<KEY> extends OutputFormat<KEY, Mutation> implemen
     private BufferedMutator mutator;
 
     /**
-     * n *
+     *
+    *
      */
     public TableRecordWriter() throws IOException {
       String tableName = conf.get(OUTPUT_TABLE);
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableRecordReader.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableRecordReader.java
index a0df98796b4..6b22ad1bb0f 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableRecordReader.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TableRecordReader.java
@@ -70,7 +70,8 @@ public class TableRecordReader extends RecordReader<ImmutableBytesWritable, Resu
 
   /**
    * Returns the current key.
-   * @return The current key. n * @throws InterruptedException When the job is aborted.
+   * @return The current key.
+   * @throws InterruptedException When the job is aborted.
    * @see org.apache.hadoop.mapreduce.RecordReader#getCurrentKey()
    */
   @Override
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TextSortReducer.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TextSortReducer.java
index 79dfe752be0..2fba0197858 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TextSortReducer.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TextSortReducer.java
@@ -92,7 +92,7 @@ public class TextSortReducer
    * Handles initializing this class with objects specific to it (i.e., the parser). Common
    * initialization that might be leveraged by a subsclass is done in <code>doSetup</code>. Hence a
    * subclass may choose to override this method and call <code>doSetup</code> as well before
-   * handling it's own custom params. n
+   * handling it's own custom params.
    */
   @Override
   protected void setup(Context context) {
@@ -107,7 +107,7 @@ public class TextSortReducer
   }
 
   /**
-   * Handles common parameter initialization that a subclass might want to leverage. nn
+   * Handles common parameter initialization that a subclass might want to leverage.
    */
   protected void doSetup(Context context, Configuration conf) {
     // If a custom separator has been used,
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterMapper.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterMapper.java
index 04c7e87d3b4..fe3077fcf22 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterMapper.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterMapper.java
@@ -93,7 +93,7 @@ public class TsvImporterMapper extends Mapper<LongWritable, Text, ImmutableBytes
    * Handles initializing this class with objects specific to it (i.e., the parser). Common
    * initialization that might be leveraged by a subsclass is done in <code>doSetup</code>. Hence a
    * subclass may choose to override this method and call <code>doSetup</code> as well before
-   * handling it's own custom params. n
+   * handling it's own custom params.
    */
   @Override
   protected void setup(Context context) {
@@ -109,7 +109,7 @@ public class TsvImporterMapper extends Mapper<LongWritable, Text, ImmutableBytes
   }
 
   /**
-   * Handles common parameter initialization that a subclass might want to leverage. n
+   * Handles common parameter initialization that a subclass might want to leverage.
    */
   protected void doSetup(Context context) {
     Configuration conf = context.getConfiguration();
diff --git a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterTextMapper.java b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterTextMapper.java
index 3ee760af74d..87ef096ad9e 100644
--- a/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterTextMapper.java
+++ b/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/TsvImporterTextMapper.java
@@ -61,7 +61,7 @@ public class TsvImporterTextMapper
    * Handles initializing this class with objects specific to it (i.e., the parser). Common
    * initialization that might be leveraged by a subclass is done in <code>doSetup</code>. Hence a
    * subclass may choose to override this method and call <code>doSetup</code> as well before
-   * handling it's own custom params. n
+   * handling it's own custom params.
    */
   @Override
   protected void setup(Context context) {
@@ -76,7 +76,7 @@ public class TsvImporterTextMapper
   }
 
   /**
-   * Handles common parameter initialization that a subclass might want to leverage. n
+   * Handles common parameter initialization that a subclass might want to leverage.
    */
   protected void doSetup(Context context) {
     Configuration conf = context.getConfiguration();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
index ae749f1e870..6a9db659e3d 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/PerformanceEvaluation.java
@@ -264,7 +264,7 @@ public class PerformanceEvaluation extends Configured implements Tool {
   interface Status {
     /**
      * Sets status
-     * @param msg status message n
+     * @param msg status message
      */
     void setStatus(final String msg) throws IOException;
   }
@@ -542,7 +542,7 @@ public class PerformanceEvaluation extends Configured implements Tool {
   /*
    * Run a mapreduce job. Run as many maps as asked-for clients. Before we start up the job, write
    * out an input file with instruction per client regards which row they are to start on.
-   * @param cmd Command to run. n
+   * @param cmd Command to run.
    */
   static Job doMapReduce(TestOptions opts, final Configuration conf)
     throws IOException, InterruptedException, ClassNotFoundException {
@@ -593,7 +593,7 @@ public class PerformanceEvaluation extends Configured implements Tool {
   /*
    * Write input file of offsets-per-client for the mapreduce job.
    * @param c Configuration
-   * @return Directory that contains file written whose name is JOB_INPUT_FILENAME n
+   * @return Directory that contains file written whose name is JOB_INPUT_FILENAME
    */
   static Path writeInputFile(final Configuration c, final TestOptions opts) throws IOException {
     return writeInputFile(c, opts, new Path("."));
@@ -1355,7 +1355,7 @@ public class PerformanceEvaluation extends Configured implements Tool {
 
     /*
      * Run test
-     * @return Elapsed time. n
+     * @return Elapsed time.
      */
     long test() throws IOException, InterruptedException {
       testSetup();
@@ -2447,8 +2447,9 @@ public class PerformanceEvaluation extends Configured implements Tool {
   }
 
   /*
-   * Format passed integer. n * @return Returns zero-prefixed ROW_LENGTH-byte wide decimal version
-   * of passed number (Does absolute in case number is negative).
+   * Format passed integer.
+   * @return Returns zero-prefixed ROW_LENGTH-byte wide decimal version of passed number (Does
+   * absolute in case number is negative).
    */
   public static byte[] format(final int number) {
     byte[] b = new byte[ROW_LENGTH];
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java
index f9891067e6b..40a785abfb8 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapred/TestTableInputFormat.java
@@ -110,15 +110,15 @@ public class TestTableInputFormat {
   /**
    * Setup a table with two rows and values.
    * @param tableName the name of the table to create
-   * @return A Table instance for the created table. n
+   * @return A Table instance for the created table.
    */
   public static Table createTable(byte[] tableName) throws IOException {
     return createTable(tableName, new byte[][] { FAMILY });
   }
 
   /**
-   * Setup a table with two rows and values per column family. n * @return A Table instance for the
-   * created table. n
+   * Setup a table with two rows and values per column family.
+   * @return A Table instance for the created table.
    */
   public static Table createTable(byte[] tableName, byte[][] families) throws IOException {
     Table table = UTIL.createTable(TableName.valueOf(tableName), families);
@@ -153,7 +153,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Create table data and run tests on specified htable using the o.a.h.hbase.mapred API. nn
+   * Create table data and run tests on specified htable using the o.a.h.hbase.mapred API.
    */
   static void runTestMapred(Table table) throws IOException {
     org.apache.hadoop.hbase.mapred.TableRecordReader trr =
@@ -181,7 +181,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Create a table that IOE's on first scanner next call n
+   * Create a table that IOE's on first scanner next call
    */
   static Table createIOEScannerTable(byte[] name, final int failCnt) throws IOException {
     // build up a mock scanner stuff to fail the first time
@@ -212,7 +212,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Create a table that throws a DoNoRetryIOException on first scanner next call n
+   * Create a table that throws a DoNoRetryIOException on first scanner next call
    */
   static Table createDNRIOEScannerTable(byte[] name, final int failCnt) throws IOException {
     // build up a mock scanner stuff to fail the first time
@@ -245,7 +245,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming no errors using mapred api. n
+   * Run test assuming no errors using mapred api.
    */
   @Test
   public void testTableRecordReader() throws IOException {
@@ -254,7 +254,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming Scanner IOException failure using mapred api, n
+   * Run test assuming Scanner IOException failure using mapred api,
    */
   @Test
   public void testTableRecordReaderScannerFail() throws IOException {
@@ -263,7 +263,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming Scanner IOException failure using mapred api, n
+   * Run test assuming Scanner IOException failure using mapred api,
    */
   @Test(expected = IOException.class)
   public void testTableRecordReaderScannerFailTwice() throws IOException {
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatTestBase.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatTestBase.java
index 285b3339373..a9d9c4974f2 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatTestBase.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatTestBase.java
@@ -200,7 +200,7 @@ public abstract class MultiTableInputFormatTestBase {
   }
 
   /**
-   * Tests a MR scan using specific start and stop rows. nnn
+   * Tests a MR scan using specific start and stop rows.
    */
   private void testScan(String start, String stop, String last)
     throws IOException, InterruptedException, ClassNotFoundException {
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedHFileOutputFormat2.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedHFileOutputFormat2.java
index 2e2d7d1f167..40de2387388 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedHFileOutputFormat2.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedHFileOutputFormat2.java
@@ -776,7 +776,7 @@ public class TestCellBasedHFileOutputFormat2 {
   /**
    * Test for {@link HFileOutputFormat2#configureCompression(Configuration, HTableDescriptor)} and
    * {@link HFileOutputFormat2#createFamilyCompressionMap(Configuration)}. Tests that the
-   * compression map is correctly serialized into and deserialized from configuration n
+   * compression map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
@@ -839,7 +839,7 @@ public class TestCellBasedHFileOutputFormat2 {
   /**
    * Test for {@link HFileOutputFormat2#configureBloomType(HTableDescriptor, Configuration)} and
    * {@link HFileOutputFormat2#createFamilyBloomTypeMap(Configuration)}. Tests that the compression
-   * map is correctly serialized into and deserialized from configuration n
+   * map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
@@ -899,7 +899,7 @@ public class TestCellBasedHFileOutputFormat2 {
   /**
    * Test for {@link HFileOutputFormat2#configureBlockSize(HTableDescriptor, Configuration)} and
    * {@link HFileOutputFormat2#createFamilyBlockSizeMap(Configuration)}. Tests that the compression
-   * map is correctly serialized into and deserialized from configuration n
+   * map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
@@ -962,7 +962,7 @@ public class TestCellBasedHFileOutputFormat2 {
   /**
    * Test for {@link HFileOutputFormat2#configureDataBlockEncoding(HTableDescriptor, Configuration)}
    * and {@link HFileOutputFormat2#createFamilyDataBlockEncodingMap(Configuration)}. Tests that the
-   * compression map is correctly serialized into and deserialized from configuration n
+   * compression map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedImportExport2.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedImportExport2.java
index cfa961327ed..34323e46940 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedImportExport2.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedImportExport2.java
@@ -153,8 +153,8 @@ public class TestCellBasedImportExport2 {
   }
 
   /**
-   * Runs an export job with the specified command line args n * @return true if job completed
-   * successfully nnn
+   * Runs an export job with the specified command line args
+   * @return true if job completed successfully
    */
   protected boolean runExport(String[] args) throws Throwable {
     // need to make a copy of the configuration because to make sure different temp dirs are used.
@@ -167,8 +167,8 @@ public class TestCellBasedImportExport2 {
   }
 
   /**
-   * Runs an import job with the specified command line args n * @return true if job completed
-   * successfully nnn
+   * Runs an import job with the specified command line args
+   * @return true if job completed successfully
    */
   boolean runImport(String[] args) throws Throwable {
     // need to make a copy of the configuration because to make sure different temp dirs are used.
@@ -177,7 +177,7 @@ public class TestCellBasedImportExport2 {
   }
 
   /**
-   * Test simple replication case with column mapping n
+   * Test simple replication case with column mapping
    */
   @Test
   public void testSimpleCase() throws Throwable {
@@ -229,7 +229,7 @@ public class TestCellBasedImportExport2 {
   }
 
   /**
-   * Test export hbase:meta table n
+   * Test export hbase:meta table
    */
   @Test
   public void testMetaExport() throws Throwable {
@@ -239,7 +239,7 @@ public class TestCellBasedImportExport2 {
   }
 
   /**
-   * Test import data from 0.94 exported file n
+   * Test import data from 0.94 exported file
    */
   @Test
   public void testImport94Table() throws Throwable {
@@ -488,7 +488,7 @@ public class TestCellBasedImportExport2 {
   }
 
   /**
-   * Count the number of keyvalues in the specified table for the given timerange nnn
+   * Count the number of keyvalues in the specified table for the given timerange
    */
   private int getCount(Table table, Filter filter) throws IOException {
     Scan scan = new Scan();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedWALPlayer2.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedWALPlayer2.java
index 4bbacf04210..283acbabf6e 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedWALPlayer2.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCellBasedWALPlayer2.java
@@ -107,7 +107,7 @@ public class TestCellBasedWALPlayer2 {
   }
 
   /**
-   * Simple end-to-end test n
+   * Simple end-to-end test
    */
   @Test
   public void testWALPlayer() throws Exception {
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCopyTable.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCopyTable.java
index efe5abb3a5a..b1bb14bb712 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCopyTable.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestCopyTable.java
@@ -179,7 +179,7 @@ public class TestCopyTable {
   }
 
   /**
-   * Simple end-to-end test n
+   * Simple end-to-end test
    */
   @Test
   public void testCopyTable() throws Exception {
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
index 52cf4849f83..534b552a581 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHFileOutputFormat2.java
@@ -810,7 +810,7 @@ public class TestHFileOutputFormat2 {
 
   /**
    * Test for {@link HFileOutputFormat2#createFamilyCompressionMap(Configuration)}. Tests that the
-   * family compression map is correctly serialized into and deserialized from configuration n
+   * family compression map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
@@ -872,7 +872,7 @@ public class TestHFileOutputFormat2 {
 
   /**
    * Test for {@link HFileOutputFormat2#createFamilyBloomTypeMap(Configuration)}. Tests that the
-   * family bloom type map is correctly serialized into and deserialized from configuration n
+   * family bloom type map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
@@ -931,7 +931,7 @@ public class TestHFileOutputFormat2 {
 
   /**
    * Test for {@link HFileOutputFormat2#createFamilyBlockSizeMap(Configuration)}. Tests that the
-   * family block size map is correctly serialized into and deserialized from configuration n
+   * family block size map is correctly serialized into and deserialized from configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
@@ -994,7 +994,7 @@ public class TestHFileOutputFormat2 {
   /**
    * Test for {@link HFileOutputFormat2#createFamilyDataBlockEncodingMap(Configuration)}. Tests that
    * the family data block encoding map is correctly serialized into and deserialized from
-   * configuration n
+   * configuration
    */
   @Ignore("Goes zombie too frequently; needs work. See HBASE-14563")
   @Test
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportExport.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportExport.java
index 305695c83c0..81c847b2ab8 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportExport.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportExport.java
@@ -172,8 +172,8 @@ public class TestImportExport {
   }
 
   /**
-   * Runs an export job with the specified command line args n * @return true if job completed
-   * successfully nnn
+   * Runs an export job with the specified command line args
+   * @return true if job completed successfully
    */
   protected boolean runExport(String[] args) throws Throwable {
     // need to make a copy of the configuration because to make sure different temp dirs are used.
@@ -186,8 +186,8 @@ public class TestImportExport {
   }
 
   /**
-   * Runs an import job with the specified command line args n * @return true if job completed
-   * successfully nnn
+   * Runs an import job with the specified command line args
+   * @return true if job completed successfully
    */
   boolean runImport(String[] args) throws Throwable {
     // need to make a copy of the configuration because to make sure different temp dirs are used.
@@ -196,7 +196,7 @@ public class TestImportExport {
   }
 
   /**
-   * Test simple replication case with column mapping n
+   * Test simple replication case with column mapping
    */
   @Test
   public void testSimpleCase() throws Throwable {
@@ -248,7 +248,7 @@ public class TestImportExport {
   }
 
   /**
-   * Test export hbase:meta table n
+   * Test export hbase:meta table
    */
   @Test
   public void testMetaExport() throws Throwable {
@@ -258,7 +258,7 @@ public class TestImportExport {
   }
 
   /**
-   * Test import data from 0.94 exported file n
+   * Test import data from 0.94 exported file
    */
   @Test
   public void testImport94Table() throws Throwable {
@@ -509,7 +509,7 @@ public class TestImportExport {
   /**
    * Count the number of keyvalues in the specified table with the given filter
    * @param table the table to scan
-   * @return the number of keyvalues found n
+   * @return the number of keyvalues found
    */
   private int getCount(Table table, Filter filter) throws IOException {
     Scan scan = new Scan();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithOperationAttributes.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithOperationAttributes.java
index 3ce402accd6..936cf90372b 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithOperationAttributes.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithOperationAttributes.java
@@ -154,9 +154,9 @@ public class TestImportTSVWithOperationAttributes implements Configurable {
   /**
    * Run an ImportTsv job and perform basic validation on the results. Returns the ImportTsv
    * <code>Tool</code> instance so that other tests can inspect it for further validation as
-   * necessary. This method is static to insure non-reliance on instance's util/conf facilities. n *
-   * Any arguments to pass BEFORE inputFile path is appended. n * @return The Tool instance used to
-   * run the test.
+   * necessary. This method is static to insure non-reliance on instance's util/conf facilities. Any
+   * arguments to pass BEFORE inputFile path is appended.
+   * @return The Tool instance used to run the test.
    */
   private Tool doMROnTableTest(HBaseTestingUtility util, String family, String data, String[] args,
     int valueMultiplier, boolean dataAvailable) throws Exception {
@@ -193,7 +193,7 @@ public class TestImportTSVWithOperationAttributes implements Configurable {
   }
 
   /**
-   * Confirm ImportTsv via data in online table. n
+   * Confirm ImportTsv via data in online table.
    */
   private static void validateTable(Configuration conf, TableName tableName, String family,
     int valueMultiplier, boolean dataAvailable) throws IOException {
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithVisibilityLabels.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithVisibilityLabels.java
index a14f60b2fba..63b9ef4f3ca 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithVisibilityLabels.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTSVWithVisibilityLabels.java
@@ -315,8 +315,8 @@ public class TestImportTSVWithVisibilityLabels implements Configurable {
   /**
    * Run an ImportTsv job and perform basic validation on the results. Returns the ImportTsv
    * <code>Tool</code> instance so that other tests can inspect it for further validation as
-   * necessary. This method is static to insure non-reliance on instance's util/conf facilities. n *
-   * Any arguments to pass BEFORE inputFile path is appended.
+   * necessary. This method is static to insure non-reliance on instance's util/conf facilities. Any
+   * arguments to pass BEFORE inputFile path is appended.
    * @param expectedKVCount Expected KV count. pass -1 to skip the kvcount check
    * @return The Tool instance used to run the test.
    */
@@ -460,7 +460,7 @@ public class TestImportTSVWithVisibilityLabels implements Configurable {
    * Method returns the total KVs in given hfile
    * @param fs File System
    * @param p  HFile path
-   * @return KV count in the given hfile n
+   * @return KV count in the given hfile
    */
   private static int getKVCountFromHfile(FileSystem fs, Path p) throws IOException {
     Configuration conf = util.getConfiguration();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTsv.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTsv.java
index 00bb81d0bb8..43516f20e84 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTsv.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportTsv.java
@@ -540,7 +540,7 @@ public class TestImportTsv implements Configurable {
    * Method returns the total KVs in given hfile
    * @param fs File System
    * @param p  HFile path
-   * @return KV count in the given hfile n
+   * @return KV count in the given hfile
    */
   private static int getKVCountFromHfile(FileSystem fs, Path p) throws IOException {
     Configuration conf = util.getConfiguration();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormatBase.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormatBase.java
index 4ff1d1acad0..32da37f1f4f 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormatBase.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultiTableInputFormatBase.java
@@ -79,7 +79,7 @@ public class TestMultiTableInputFormatBase {
   /**
    * Test getSplits only puts up one Connection. In past it has put up many Connections. Each
    * Connection setup comes with a fresh new cache so we have to do fresh hit on hbase:meta. Should
-   * only do one Connection when doing getSplits even if a MultiTableInputFormat. n
+   * only do one Connection when doing getSplits even if a MultiTableInputFormat.
    */
   @Test
   public void testMRSplitsConnectionCount() throws IOException {
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultithreadedTableMapper.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultithreadedTableMapper.java
index 647f243aed0..3c8e5b6f16c 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultithreadedTableMapper.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestMultithreadedTableMapper.java
@@ -93,7 +93,7 @@ public class TestMultithreadedTableMapper {
   public static class ProcessContentsMapper extends TableMapper<ImmutableBytesWritable, Put> {
 
     /**
-     * Pass the key, and reversed value to reduce nnnn
+     * Pass the key, and reversed value to reduce
      */
     @Override
     public void map(ImmutableBytesWritable key, Result value, Context context)
@@ -118,7 +118,7 @@ public class TestMultithreadedTableMapper {
   }
 
   /**
-   * Test multithreadedTableMappper map/reduce against a multi-region table nnn
+   * Test multithreadedTableMappper map/reduce against a multi-region table
    */
   @Test
   public void testMultithreadedTableMapper()
@@ -184,7 +184,8 @@ public class TestMultithreadedTableMapper {
   /**
    * Looks at every value of the mapreduce output and verifies that indeed the values have been
    * reversed.
-   * @param table Table to scan. n * @throws NullPointerException if we failed to find a cell value
+   * @param table Table to scan.
+   * @throws NullPointerException if we failed to find a cell value
    */
   private void verifyAttempt(final Table table) throws IOException, NullPointerException {
     Scan scan = new Scan();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestRowCounter.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestRowCounter.java
index 6c282b4be8f..55e26fb233a 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestRowCounter.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestRowCounter.java
@@ -86,7 +86,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when no column was specified in command line arguments. n
+   * Test a case when no column was specified in command line arguments.
    */
   @Test
   public void testRowCounterNoColumn() throws Exception {
@@ -95,7 +95,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when the column specified in command line arguments is exclusive for few rows. n
+   * Test a case when the column specified in command line arguments is exclusive for few rows.
    */
   @Test
   public void testRowCounterExclusiveColumn() throws Exception {
@@ -105,7 +105,7 @@ public class TestRowCounter {
 
   /**
    * Test a case when the column specified in command line arguments is one for which the qualifier
-   * contains colons. n
+   * contains colons.
    */
   @Test
   public void testRowCounterColumnWithColonInQualifier() throws Exception {
@@ -115,7 +115,7 @@ public class TestRowCounter {
 
   /**
    * Test a case when the column specified in command line arguments is not part of first KV for a
-   * row. n
+   * row.
    */
   @Test
   public void testRowCounterHiddenColumn() throws Exception {
@@ -125,7 +125,7 @@ public class TestRowCounter {
 
   /**
    * Test a case when the column specified in command line arguments is exclusive for few rows and
-   * also a row range filter is specified n
+   * also a row range filter is specified
    */
   @Test
   public void testRowCounterColumnAndRowRange() throws Exception {
@@ -134,7 +134,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when a range is specified with single range of start-end keys n
+   * Test a case when a range is specified with single range of start-end keys
    */
   @Test
   public void testRowCounterRowSingleRange() throws Exception {
@@ -143,7 +143,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when a range is specified with single range with end key only n
+   * Test a case when a range is specified with single range with end key only
    */
   @Test
   public void testRowCounterRowSingleRangeUpperBound() throws Exception {
@@ -152,7 +152,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when a range is specified with two ranges where one range is with end key only n
+   * Test a case when a range is specified with two ranges where one range is with end key only
    */
   @Test
   public void testRowCounterRowMultiRangeUpperBound() throws Exception {
@@ -161,7 +161,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when a range is specified with multiple ranges of start-end keys n
+   * Test a case when a range is specified with multiple ranges of start-end keys
    */
   @Test
   public void testRowCounterRowMultiRange() throws Exception {
@@ -171,7 +171,7 @@ public class TestRowCounter {
 
   /**
    * Test a case when a range is specified with multiple ranges of start-end keys; one range is
-   * filled, another two are not n
+   * filled, another two are not
    */
   @Test
   public void testRowCounterRowMultiEmptyRange() throws Exception {
@@ -192,7 +192,7 @@ public class TestRowCounter {
   }
 
   /**
-   * Test a case when the timerange is specified with --starttime and --endtime options n
+   * Test a case when the timerange is specified with --starttime and --endtime options
    */
   @Test
   public void testRowCounterTimeRange() throws Exception {
@@ -240,7 +240,7 @@ public class TestRowCounter {
   /**
    * Run the RowCounter map reduce job and verify the row count.
    * @param args          the command line arguments to be used for rowcounter job.
-   * @param expectedCount the expected row count (result of map reduce job). n
+   * @param expectedCount the expected row count (result of map reduce job).
    */
   private void runRowCount(String[] args, int expectedCount) throws Exception {
     RowCounter rowCounter = new RowCounter();
@@ -432,7 +432,7 @@ public class TestRowCounter {
 
   /**
    * Writes TOTAL_ROWS number of distinct rows in to the table. Few rows have two columns, Few have
-   * one. nn
+   * one.
    */
   private static void writeRows(Table table, int totalRows, int rowsWithOneCol) throws IOException {
     final byte[] family = Bytes.toBytes(COL_FAM);
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableInputFormat.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableInputFormat.java
index 1986200c187..8d29415612f 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableInputFormat.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableInputFormat.java
@@ -105,15 +105,16 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Setup a table with two rows and values. n * @return A Table instance for the created table. n
+   * Setup a table with two rows and values.
+   * @return A Table instance for the created table.
    */
   public static Table createTable(byte[] tableName) throws IOException {
     return createTable(tableName, new byte[][] { FAMILY });
   }
 
   /**
-   * Setup a table with two rows and values per column family. n * @return A Table instance for the
-   * created table. n
+   * Setup a table with two rows and values per column family.
+   * @return A Table instance for the created table.
    */
   public static Table createTable(byte[] tableName, byte[][] families) throws IOException {
     Table table = UTIL.createTable(TableName.valueOf(tableName), families);
@@ -148,7 +149,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Create table data and run tests on specified htable using the o.a.h.hbase.mapreduce API. nnn
+   * Create table data and run tests on specified htable using the o.a.h.hbase.mapreduce API.
    */
   static void runTestMapreduce(Table table) throws IOException, InterruptedException {
     org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl trr =
@@ -182,7 +183,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Create a table that IOE's on first scanner next call n
+   * Create a table that IOE's on first scanner next call
    */
   static Table createIOEScannerTable(byte[] name, final int failCnt) throws IOException {
     // build up a mock scanner stuff to fail the first time
@@ -213,7 +214,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Create a table that throws a NotServingRegionException on first scanner next call n
+   * Create a table that throws a NotServingRegionException on first scanner next call
    */
   static Table createDNRIOEScannerTable(byte[] name, final int failCnt) throws IOException {
     // build up a mock scanner stuff to fail the first time
@@ -246,7 +247,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming no errors using newer mapreduce api nn
+   * Run test assuming no errors using newer mapreduce api
    */
   @Test
   public void testTableRecordReaderMapreduce() throws IOException, InterruptedException {
@@ -255,7 +256,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming Scanner IOException failure using newer mapreduce api nn
+   * Run test assuming Scanner IOException failure using newer mapreduce api
    */
   @Test
   public void testTableRecordReaderScannerFailMapreduce() throws IOException, InterruptedException {
@@ -264,7 +265,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming Scanner IOException failure using newer mapreduce api nn
+   * Run test assuming Scanner IOException failure using newer mapreduce api
    */
   @Test(expected = IOException.class)
   public void testTableRecordReaderScannerFailMapreduceTwice()
@@ -274,8 +275,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming NotServingRegionException using newer mapreduce api n * @throws
-   * org.apache.hadoop.hbase.DoNotRetryIOException
+   * Run test assuming NotServingRegionException using newer mapreduce api
    */
   @Test
   public void testTableRecordReaderScannerTimeoutMapreduce()
@@ -285,8 +285,7 @@ public class TestTableInputFormat {
   }
 
   /**
-   * Run test assuming NotServingRegionException using newer mapreduce api n * @throws
-   * org.apache.hadoop.hbase.NotServingRegionException
+   * Run test assuming NotServingRegionException using newer mapreduce api
    */
   @Test(expected = org.apache.hadoop.hbase.NotServingRegionException.class)
   public void testTableRecordReaderScannerTimeoutMapreduceTwice()
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduce.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduce.java
index e1bd1626870..99606050667 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduce.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduce.java
@@ -76,7 +76,7 @@ public class TestTableMapReduce extends TestTableMapReduceBase {
   static class ProcessContentsMapper extends TableMapper<ImmutableBytesWritable, Put> {
 
     /**
-     * Pass the key, and reversed value to reduce nnnn
+     * Pass the key, and reversed value to reduce
      */
     @Override
     public void map(ImmutableBytesWritable key, Result value, Context context)
@@ -136,7 +136,7 @@ public class TestTableMapReduce extends TestTableMapReduceBase {
   }
 
   /**
-   * Verify scan counters are emitted from the job nn
+   * Verify scan counters are emitted from the job
    */
   private void verifyJobCountersAreEmitted(Job job) throws IOException {
     Counters counters = job.getCounters();
diff --git a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduceBase.java b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduceBase.java
index 536aa5d4cbc..3ff8bafea48 100644
--- a/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduceBase.java
+++ b/hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestTableMapReduceBase.java
@@ -83,7 +83,7 @@ public abstract class TestTableMapReduceBase {
   }
 
   /**
-   * Test a map/reduce against a multi-region table n
+   * Test a map/reduce against a multi-region table
    */
   @Test
   public void testMultiRegionTable() throws IOException {
@@ -152,7 +152,8 @@ public abstract class TestTableMapReduceBase {
   /**
    * Looks at every value of the mapreduce output and verifies that indeed the values have been
    * reversed.
-   * @param table Table to scan. n * @throws NullPointerException if we failed to find a cell value
+   * @param table Table to scan.
+   * @throws NullPointerException if we failed to find a cell value
    */
   private void verifyAttempt(final Table table) throws IOException, NullPointerException {
     Scan scan = new Scan();
diff --git a/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.java b/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.java
index f11c97c1952..0813d8fe5f8 100644
--- a/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.java
+++ b/hbase-procedure/src/main/java/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALPrettyPrinter.java
@@ -144,8 +144,7 @@ public class ProcedureWALPrettyPrinter extends Configured implements Tool {
 
   /**
    * Pass one or more log file names and formatting options and it will dump out a text version of
-   * the contents on <code>stdout</code>. n * Command line arguments n * Thrown upon file system
-   * errors etc.
+   * the contents on <code>stdout</code>. Command line arguments Thrown upon file system errors etc.
    */
   @Override
   public int run(final String[] args) throws IOException {
diff --git a/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeers.java b/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeers.java
index f852066ed90..72bfe5daa55 100644
--- a/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeers.java
+++ b/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeers.java
@@ -65,7 +65,7 @@ public class ReplicationPeers {
    * Method called after a peer has been connected. It will create a ReplicationPeer to track the
    * newly connected cluster.
    * @param peerId a short that identifies the cluster
-   * @return whether a ReplicationPeer was successfully created n
+   * @return whether a ReplicationPeer was successfully created
    */
   public boolean addPeer(String peerId) throws ReplicationException {
     if (this.peerCache.containsKey(peerId)) {
diff --git a/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationTracker.java b/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationTracker.java
index c04245d4c15..9e0099001d9 100644
--- a/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationTracker.java
+++ b/hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationTracker.java
@@ -33,7 +33,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface ReplicationTracker {
 
   /**
-   * Register a replication listener to receive replication events. n
+   * Register a replication listener to receive replication events.
    */
   void registerListener(ReplicationListener listener);
 
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ExistsResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ExistsResource.java
index 61dede2ae83..47852f4df2b 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ExistsResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ExistsResource.java
@@ -41,7 +41,7 @@ public class ExistsResource extends ResourceBase {
   TableResource tableResource;
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public ExistsResource(TableResource tableResource) throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/MultiRowResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/MultiRowResource.java
index 68d774e420c..cc5fb22265c 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/MultiRowResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/MultiRowResource.java
@@ -44,7 +44,7 @@ public class MultiRowResource extends ResourceBase implements Constants {
   String[] columns = null;
 
   /**
-   * Constructor nn * @throws java.io.IOException
+   * Constructor
    */
   public MultiRowResource(TableResource tableResource, String versions, String columnsStr)
     throws IOException {
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesInstanceResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesInstanceResource.java
index b661e46f928..355dac23c44 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesInstanceResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesInstanceResource.java
@@ -60,14 +60,14 @@ public class NamespacesInstanceResource extends ResourceBase {
   boolean queryTables = false;
 
   /**
-   * Constructor for standard NamespaceInstanceResource. n
+   * Constructor for standard NamespaceInstanceResource.
    */
   public NamespacesInstanceResource(String namespace) throws IOException {
     this(namespace, false);
   }
 
   /**
-   * Constructor for querying namespace table list via NamespaceInstanceResource. n
+   * Constructor for querying namespace table list via NamespaceInstanceResource.
    */
   public NamespacesInstanceResource(String namespace, boolean queryTables) throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesResource.java
index a3c0e2d2f1a..aeccda24f19 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/NamespacesResource.java
@@ -44,7 +44,7 @@ public class NamespacesResource extends ResourceBase {
   private static final Logger LOG = LoggerFactory.getLogger(NamespacesResource.class);
 
   /**
-   * Constructor n
+   * Constructor
    */
   public NamespacesResource() throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ProtobufMessageHandler.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ProtobufMessageHandler.java
index 39a7ba71dd6..2e01ff24d47 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ProtobufMessageHandler.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ProtobufMessageHandler.java
@@ -32,7 +32,7 @@ public interface ProtobufMessageHandler {
   /**
    * Initialize the model from a protobuf representation.
    * @param message the raw bytes of the protobuf message
-   * @return reference to self for convenience n
+   * @return reference to self for convenience
    */
   ProtobufMessageHandler getObjectFromMessage(byte[] message) throws IOException;
 }
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RESTServlet.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RESTServlet.java
index 79760aead9d..7212993fb8d 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RESTServlet.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RESTServlet.java
@@ -90,7 +90,7 @@ public class RESTServlet implements Constants {
   /**
    * Constructor with existing configuration
    * @param conf         existing configuration
-   * @param userProvider the login user provider n
+   * @param userProvider the login user provider
    */
   RESTServlet(final Configuration conf, final UserProvider userProvider) throws IOException {
     this.realUser = userProvider.getCurrent().getUGI();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RegionsResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RegionsResource.java
index 21c97302603..17beae40f7b 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RegionsResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RegionsResource.java
@@ -55,7 +55,7 @@ public class RegionsResource extends ResourceBase {
   TableResource tableResource;
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public RegionsResource(TableResource tableResource) throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RootResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RootResource.java
index 9baf7aa7c04..babb3d1152c 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RootResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RootResource.java
@@ -48,7 +48,7 @@ public class RootResource extends ResourceBase {
   }
 
   /**
-   * Constructor n
+   * Constructor
    */
   public RootResource() throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RowResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RowResource.java
index 16259c34167..df4664b76c5 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RowResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/RowResource.java
@@ -69,7 +69,7 @@ public class RowResource extends ResourceBase {
   private boolean returnResult = false;
 
   /**
-   * Constructor nnnnnn
+   * Constructor
    */
   public RowResource(TableResource tableResource, String rowspec, String versions, String check,
     String returnResult) throws IOException {
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ScannerResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ScannerResource.java
index 1c2929aab7a..d15537b1c87 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ScannerResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/ScannerResource.java
@@ -52,7 +52,7 @@ public class ScannerResource extends ResourceBase {
   TableResource tableResource;
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public ScannerResource(TableResource tableResource) throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/SchemaResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/SchemaResource.java
index ee15cecccd3..8ead5a6f464 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/SchemaResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/SchemaResource.java
@@ -61,7 +61,7 @@ public class SchemaResource extends ResourceBase {
   TableResource tableResource;
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public SchemaResource(TableResource tableResource) throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterStatusResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterStatusResource.java
index 85b3b3f6556..fe07c93c8a9 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterStatusResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterStatusResource.java
@@ -51,7 +51,7 @@ public class StorageClusterStatusResource extends ResourceBase {
   }
 
   /**
-   * Constructor n
+   * Constructor
    */
   public StorageClusterStatusResource() throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterVersionResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterVersionResource.java
index ea7641e54cd..00c243aec72 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterVersionResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/StorageClusterVersionResource.java
@@ -45,7 +45,7 @@ public class StorageClusterVersionResource extends ResourceBase {
   }
 
   /**
-   * Constructor n
+   * Constructor
    */
   public StorageClusterVersionResource() throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/TableResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/TableResource.java
index c40165c8254..24ced31d36a 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/TableResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/TableResource.java
@@ -46,7 +46,7 @@ public class TableResource extends ResourceBase {
   private static final Logger LOG = LoggerFactory.getLogger(TableResource.class);
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public TableResource(String table) throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/VersionResource.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/VersionResource.java
index 8b71f708645..d78ba90cd8c 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/VersionResource.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/VersionResource.java
@@ -53,7 +53,7 @@ public class VersionResource extends ResourceBase {
   }
 
   /**
-   * Constructor n
+   * Constructor
    */
   public VersionResource() throws IOException {
     super();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/client/Client.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/client/Client.java
index 20a6db113af..97586b96825 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/client/Client.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/client/Client.java
@@ -254,7 +254,7 @@ public class Client {
    * @param method  the transaction method
    * @param headers HTTP header values to send
    * @param path    the properly urlencoded path
-   * @return the HTTP response code n
+   * @return the HTTP response code
    */
   public HttpResponse executePathOnly(Cluster cluster, HttpUriRequest method, Header[] headers,
     String path) throws IOException {
@@ -308,7 +308,7 @@ public class Client {
    * @param method  the transaction method
    * @param headers HTTP header values to send
    * @param uri     a properly urlencoded URI
-   * @return the HTTP response code n
+   * @return the HTTP response code
    */
   public HttpResponse executeURI(HttpUriRequest method, Header[] headers, String uri)
     throws IOException {
@@ -347,7 +347,7 @@ public class Client {
    * @param method  the HTTP method
    * @param headers HTTP header values to send
    * @param path    the properly urlencoded path or URI
-   * @return the HTTP response code n
+   * @return the HTTP response code
    */
   public HttpResponse execute(Cluster cluster, HttpUriRequest method, Header[] headers, String path)
     throws IOException {
@@ -406,7 +406,7 @@ public class Client {
   /**
    * Send a HEAD request
    * @param path the path or URI
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response head(String path) throws IOException {
     return head(cluster, path, null);
@@ -417,7 +417,7 @@ public class Client {
    * @param cluster the cluster definition
    * @param path    the path or URI
    * @param headers the HTTP headers to include in the request
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response head(Cluster cluster, String path, Header[] headers) throws IOException {
     HttpHead method = new HttpHead(path);
@@ -432,7 +432,7 @@ public class Client {
   /**
    * Send a GET request
    * @param path the path or URI
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response get(String path) throws IOException {
     return get(cluster, path);
@@ -442,7 +442,7 @@ public class Client {
    * Send a GET request
    * @param cluster the cluster definition
    * @param path    the path or URI
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response get(Cluster cluster, String path) throws IOException {
     return get(cluster, path, EMPTY_HEADER_ARRAY);
@@ -452,7 +452,7 @@ public class Client {
    * Send a GET request
    * @param path   the path or URI
    * @param accept Accept header value
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response get(String path, String accept) throws IOException {
     return get(cluster, path, accept);
@@ -463,7 +463,7 @@ public class Client {
    * @param cluster the cluster definition
    * @param path    the path or URI
    * @param accept  Accept header value
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response get(Cluster cluster, String path, String accept) throws IOException {
     Header[] headers = new Header[1];
@@ -475,7 +475,7 @@ public class Client {
    * Send a GET request
    * @param path    the path or URI
    * @param headers the HTTP headers to include in the request, <tt>Accept</tt> must be supplied
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response get(String path, Header[] headers) throws IOException {
     return get(cluster, path, headers);
@@ -521,7 +521,7 @@ public class Client {
    * @param c       the cluster definition
    * @param path    the path or URI
    * @param headers the HTTP headers to include in the request
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response get(Cluster c, String path, Header[] headers) throws IOException {
     if (httpGet != null) {
@@ -538,7 +538,7 @@ public class Client {
    * @param path        the path or URI
    * @param contentType the content MIME type
    * @param content     the content bytes
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response put(String path, String contentType, byte[] content) throws IOException {
     return put(cluster, path, contentType, content);
@@ -550,7 +550,7 @@ public class Client {
    * @param contentType the content MIME type
    * @param content     the content bytes
    * @param extraHdr    extra Header to send
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response put(String path, String contentType, byte[] content, Header extraHdr)
     throws IOException {
@@ -599,7 +599,7 @@ public class Client {
    * @param path    the path or URI
    * @param headers the HTTP headers to include, <tt>Content-Type</tt> must be supplied
    * @param content the content bytes
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response put(String path, Header[] headers, byte[] content) throws IOException {
     return put(cluster, path, headers, content);
@@ -611,7 +611,7 @@ public class Client {
    * @param path    the path or URI
    * @param headers the HTTP headers to include, <tt>Content-Type</tt> must be supplied
    * @param content the content bytes
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response put(Cluster cluster, String path, Header[] headers, byte[] content)
     throws IOException {
@@ -632,7 +632,7 @@ public class Client {
    * @param path        the path or URI
    * @param contentType the content MIME type
    * @param content     the content bytes
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response post(String path, String contentType, byte[] content) throws IOException {
     return post(cluster, path, contentType, content);
@@ -644,7 +644,7 @@ public class Client {
    * @param contentType the content MIME type
    * @param content     the content bytes
    * @param extraHdr    additional Header to send
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response post(String path, String contentType, byte[] content, Header extraHdr)
     throws IOException {
@@ -693,7 +693,7 @@ public class Client {
    * @param path    the path or URI
    * @param headers the HTTP headers to include, <tt>Content-Type</tt> must be supplied
    * @param content the content bytes
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response post(String path, Header[] headers, byte[] content) throws IOException {
     return post(cluster, path, headers, content);
@@ -705,7 +705,7 @@ public class Client {
    * @param path    the path or URI
    * @param headers the HTTP headers to include, <tt>Content-Type</tt> must be supplied
    * @param content the content bytes
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response post(Cluster cluster, String path, Header[] headers, byte[] content)
     throws IOException {
@@ -724,7 +724,7 @@ public class Client {
   /**
    * Send a DELETE request
    * @param path the path or URI
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response delete(String path) throws IOException {
     return delete(cluster, path);
@@ -734,7 +734,7 @@ public class Client {
    * Send a DELETE request
    * @param path     the path or URI
    * @param extraHdr additional Header to send
-   * @return a Response object with response detail n
+   * @return a Response object with response detail
    */
   public Response delete(String path, Header extraHdr) throws IOException {
     return delete(cluster, path, extraHdr);
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/filter/RestCsrfPreventionFilter.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/filter/RestCsrfPreventionFilter.java
index 47e67dbea5a..9071c31614c 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/filter/RestCsrfPreventionFilter.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/filter/RestCsrfPreventionFilter.java
@@ -139,7 +139,7 @@ public class RestCsrfPreventionFilter implements Filter {
     String getHeader(String header);
 
     /**
-     * Returns the method. n
+     * Returns the method.
      */
     String getMethod();
 
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/CellModel.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/CellModel.java
index 6e2391546bb..349d2a2c328 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/CellModel.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/CellModel.java
@@ -80,21 +80,21 @@ public class CellModel implements ProtobufMessageHandler, Serializable {
   }
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public CellModel(byte[] column, byte[] value) {
     this(column, HConstants.LATEST_TIMESTAMP, value);
   }
 
   /**
-   * Constructor nnn
+   * Constructor
    */
   public CellModel(byte[] column, byte[] qualifier, byte[] value) {
     this(column, qualifier, HConstants.LATEST_TIMESTAMP, value);
   }
 
   /**
-   * Constructor from KeyValue n
+   * Constructor from KeyValue
    */
   public CellModel(org.apache.hadoop.hbase.Cell cell) {
     this(CellUtil.cloneFamily(cell), CellUtil.cloneQualifier(cell), cell.getTimestamp(),
@@ -102,7 +102,7 @@ public class CellModel implements ProtobufMessageHandler, Serializable {
   }
 
   /**
-   * Constructor nnn
+   * Constructor
    */
   public CellModel(byte[] column, long timestamp, byte[] value) {
     this.column = column;
@@ -111,7 +111,7 @@ public class CellModel implements ProtobufMessageHandler, Serializable {
   }
 
   /**
-   * Constructor nnnn
+   * Constructor
    */
   public CellModel(byte[] column, byte[] qualifier, long timestamp, byte[] value) {
     this.column = CellUtil.makeColumn(column, qualifier);
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesInstanceModel.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesInstanceModel.java
index 475f9185976..39ea0b7c39b 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesInstanceModel.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesInstanceModel.java
@@ -63,7 +63,7 @@ public class NamespacesInstanceModel implements Serializable, ProtobufMessageHan
 
   /**
    * Constructor to use if namespace does not exist in HBASE.
-   * @param namespaceName the namespace name. n
+   * @param namespaceName the namespace name.
    */
   public NamespacesInstanceModel(String namespaceName) throws IOException {
     this(null, namespaceName);
@@ -72,7 +72,7 @@ public class NamespacesInstanceModel implements Serializable, ProtobufMessageHan
   /**
    * Constructor
    * @param admin         the administrative API
-   * @param namespaceName the namespace name. n
+   * @param namespaceName the namespace name.
    */
   public NamespacesInstanceModel(Admin admin, String namespaceName) throws IOException {
     this.namespaceName = namespaceName;
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesModel.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesModel.java
index 3b0e2d1e58b..76a7b32e137 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesModel.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/NamespacesModel.java
@@ -57,7 +57,7 @@ public class NamespacesModel implements Serializable, ProtobufMessageHandler {
 
   /**
    * Constructor
-   * @param admin the administrative API n
+   * @param admin the administrative API
    */
   public NamespacesModel(Admin admin) throws IOException {
     NamespaceDescriptor[] nds = admin.listNamespaceDescriptors();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/ScannerModel.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/ScannerModel.java
index 2eba8d4cad8..831c7849abb 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/ScannerModel.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/ScannerModel.java
@@ -505,7 +505,7 @@ public class ScannerModel implements ProtobufMessageHandler, Serializable {
 
   /**
    * @param s the JSON representation of the filter
-   * @return the filter n
+   * @return the filter
    */
   public static Filter buildFilter(String s) throws Exception {
     FilterModel model =
@@ -516,7 +516,7 @@ public class ScannerModel implements ProtobufMessageHandler, Serializable {
 
   /**
    * @param filter the filter
-   * @return the JSON representation of the filter n
+   * @return the JSON representation of the filter
    */
   public static String stringifyFilter(final Filter filter) throws Exception {
     return getJasonProvider().locateMapper(FilterModel.class, MediaType.APPLICATION_JSON_TYPE)
@@ -526,7 +526,7 @@ public class ScannerModel implements ProtobufMessageHandler, Serializable {
   private static final byte[] COLUMN_DIVIDER = Bytes.toBytes(":");
 
   /**
-   * @param scan the scan specification n
+   * @param scan the scan specification
    */
   public static ScannerModel fromScan(Scan scan) throws Exception {
     ScannerModel model = new ScannerModel();
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableInfoModel.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableInfoModel.java
index 37f7f79f89f..6b39daaacd6 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableInfoModel.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableInfoModel.java
@@ -58,7 +58,7 @@ public class TableInfoModel implements Serializable, ProtobufMessageHandler {
   }
 
   /**
-   * Constructor n
+   * Constructor
    */
   public TableInfoModel(String name) {
     this.name = name;
diff --git a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableModel.java b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableModel.java
index 51a2bc567cd..32459738002 100644
--- a/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableModel.java
+++ b/hbase-rest/src/main/java/org/apache/hadoop/hbase/rest/model/TableModel.java
@@ -48,7 +48,7 @@ public class TableModel implements Serializable {
   }
 
   /**
-   * Constructor n
+   * Constructor
    */
   public TableModel(String name) {
     super();
diff --git a/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/RemoteAdmin.java b/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/RemoteAdmin.java
index 9e076d433f0..610eb31cfee 100644
--- a/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/RemoteAdmin.java
+++ b/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/RemoteAdmin.java
@@ -52,7 +52,7 @@ public class RemoteAdmin {
   private static volatile Unmarshaller versionClusterUnmarshaller;
 
   /**
-   * Constructor nn
+   * Constructor
    */
   public RemoteAdmin(Client client, Configuration conf) {
     this(client, conf, null);
@@ -69,7 +69,7 @@ public class RemoteAdmin {
   }
 
   /**
-   * Constructor nnn
+   * Constructor
    */
   public RemoteAdmin(Client client, Configuration conf, String accessToken) {
     this.client = client;
@@ -89,8 +89,8 @@ public class RemoteAdmin {
   }
 
   /**
-   * @return string representing the rest api's version n * if the endpoint does not exist, there is
-   *         a timeout, or some other general failure mode
+   * @return string representing the rest api's version if the endpoint does not exist, there is a
+   *         timeout, or some other general failure mode
    */
   public VersionModel getRestVersion() throws IOException {
 
@@ -169,8 +169,8 @@ public class RemoteAdmin {
   }
 
   /**
-   * @return string representing the cluster's version n * if the endpoint does not exist, there is
-   *         a timeout, or some other general failure mode
+   * @return string representing the cluster's version if the endpoint does not exist, there is a
+   *         timeout, or some other general failure mode
    */
   public StorageClusterVersionModel getClusterVersion() throws IOException {
 
@@ -336,8 +336,8 @@ public class RemoteAdmin {
   }
 
   /**
-   * @return string representing the cluster's version n * if the endpoint does not exist, there is
-   *         a timeout, or some other general failure mode
+   * @return string representing the cluster's version if the endpoint does not exist, there is a
+   *         timeout, or some other general failure mode
    */
   public TableListModel getTableList() throws IOException {
 
diff --git a/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/TestRemoteTable.java b/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/TestRemoteTable.java
index 06c672c5a2f..a6b40d040b8 100644
--- a/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/TestRemoteTable.java
+++ b/hbase-rest/src/test/java/org/apache/hadoop/hbase/rest/client/TestRemoteTable.java
@@ -573,6 +573,47 @@ public class TestRemoteTable {
     assertTrue(response.hasBody());
   }
 
+  /**
+   * Tests scanner with limitation limit the number of rows each scanner scan fetch at life time The
+   * number of rows returned should be equal to the limit
+   */
+  @Test
+  public void testLimitedScan() throws Exception {
+    int numTrials = 100;
+    int limit = 60;
+
+    // Truncate the test table for inserting test scenarios rows keys
+    TEST_UTIL.getAdmin().disableTable(TABLE);
+    TEST_UTIL.getAdmin().truncateTable(TABLE, false);
+    String row = "testrow";
+
+    try (Table table = TEST_UTIL.getConnection().getTable(TABLE)) {
+      List<Put> puts = new ArrayList<>();
+      Put put = null;
+      for (int i = 1; i <= numTrials; i++) {
+        put = new Put(Bytes.toBytes(row + i));
+        put.addColumn(COLUMN_1, QUALIFIER_1, TS_2, Bytes.toBytes("testvalue" + i));
+        puts.add(put);
+      }
+      table.put(puts);
+    }
+
+    remoteTable =
+      new RemoteHTable(new Client(new Cluster().add("localhost", REST_TEST_UTIL.getServletPort())),
+        TEST_UTIL.getConfiguration(), TABLE.toBytes());
+
+    Scan scan = new Scan();
+    scan.setLimit(limit);
+    ResultScanner scanner = remoteTable.getScanner(scan);
+    Iterator<Result> resultIterator = scanner.iterator();
+    int counter = 0;
+    while (resultIterator.hasNext()) {
+      resultIterator.next();
+      counter++;
+    }
+    assertEquals(limit, counter);
+  }
+
   /**
    * Tests keeping a HBase scanner alive for long periods of time. Each call to next() should reset
    * the ConnectionCache timeout for the scanner's connection.
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/HealthReport.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/HealthReport.java
index 44498200991..5eca7afd28b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/HealthReport.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/HealthReport.java
@@ -34,7 +34,7 @@ class HealthReport {
   }
 
   /**
-   * Gets the status of the region server. n
+   * Gets the status of the region server.
    */
   HealthCheckerExitStatus getStatus() {
     return status;
@@ -46,7 +46,7 @@ class HealthReport {
   }
 
   /**
-   * Gets the health report of the region server. n
+   * Gets the health report of the region server.
    */
   String getHealthReport() {
     return healthReport;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/LocalHBaseCluster.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/LocalHBaseCluster.java
index a803b6aee9d..816ef997cbd 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/LocalHBaseCluster.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/LocalHBaseCluster.java
@@ -66,7 +66,7 @@ public class LocalHBaseCluster {
   private final Class<? extends HRegionServer> regionServerClass;
 
   /**
-   * Constructor. nn
+   * Constructor.
    */
   public LocalHBaseCluster(final Configuration conf) throws IOException {
     this(conf, DEFAULT_NO);
@@ -75,7 +75,7 @@ public class LocalHBaseCluster {
   /**
    * Constructor.
    * @param conf            Configuration to use. Post construction has the master's address.
-   * @param noRegionServers Count of regionservers to start. n
+   * @param noRegionServers Count of regionservers to start.
    */
   public LocalHBaseCluster(final Configuration conf, final int noRegionServers) throws IOException {
     this(conf, 1, 0, noRegionServers, getMasterImplementation(conf),
@@ -86,7 +86,7 @@ public class LocalHBaseCluster {
    * Constructor.
    * @param conf            Configuration to use. Post construction has the active master address.
    * @param noMasters       Count of masters to start.
-   * @param noRegionServers Count of regionservers to start. n
+   * @param noRegionServers Count of regionservers to start.
    */
   public LocalHBaseCluster(final Configuration conf, final int noMasters, final int noRegionServers)
     throws IOException {
@@ -116,7 +116,7 @@ public class LocalHBaseCluster {
    * Constructor.
    * @param conf            Configuration to use. Post construction has the master's address.
    * @param noMasters       Count of masters to start.
-   * @param noRegionServers Count of regionservers to start. nnn
+   * @param noRegionServers Count of regionservers to start.
    */
   @SuppressWarnings("unchecked")
   public LocalHBaseCluster(final Configuration conf, final int noMasters,
@@ -240,9 +240,7 @@ public class LocalHBaseCluster {
     });
   }
 
-  /**
-   * n * @return region server
-   */
+  /** Returns region server */
   public HRegionServer getRegionServer(int serverNumber) {
     return regionThreads.get(serverNumber).getRegionServer();
   }
@@ -427,7 +425,7 @@ public class LocalHBaseCluster {
   }
 
   /**
-   * Test things basically work. nn
+   * Test things basically work.
    */
   public static void main(String[] args) throws IOException {
     Configuration conf = HBaseConfiguration.create();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/RegionStateListener.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/RegionStateListener.java
index 47f6938652d..62da616acb5 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/RegionStateListener.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/RegionStateListener.java
@@ -30,7 +30,7 @@ public interface RegionStateListener {
   // state than introduce a whole new listening mechanism? St.Ack
   /**
    * Process region split event.
-   * @param hri An instance of RegionInfo n
+   * @param hri An instance of RegionInfo
    */
   void onRegionSplit(RegionInfo hri) throws IOException;
 
@@ -42,7 +42,7 @@ public interface RegionStateListener {
   void onRegionSplitReverted(RegionInfo hri) throws IOException;
 
   /**
-   * Process region merge event. n
+   * Process region merge event.
    */
   void onRegionMerged(RegionInfo mergedRegion) throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/SplitLogTask.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/SplitLogTask.java
index 280ad3b7c47..d9bec2e3d81 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/SplitLogTask.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/SplitLogTask.java
@@ -146,8 +146,8 @@ public class SplitLogTask {
 
   /**
    * @param data Serialized date to parse.
-   * @return An SplitLogTaskState instance made of the passed <code>data</code> n * @see
-   *         #toByteArray()
+   * @return An SplitLogTaskState instance made of the passed <code>data</code>
+   * @see #toByteArray()
    */
   public static SplitLogTask parseFrom(final byte[] data) throws DeserializationException {
     ProtobufUtil.expectPBMagicPrefix(data);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/backup/HFileArchiver.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/backup/HFileArchiver.java
index 68dc87502e0..8615efe6a7e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/backup/HFileArchiver.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/backup/HFileArchiver.java
@@ -692,12 +692,12 @@ public class HFileArchiver {
 
     /**
      * @return if this is a directory, returns all the children in the directory, otherwise returns
-     *         an empty list n
+     *         an empty list
      */
     abstract Collection<File> getChildren() throws IOException;
 
     /**
-     * close any outside readers of the file n
+     * close any outside readers of the file
      */
     abstract void close() throws IOException;
 
@@ -708,7 +708,8 @@ public class HFileArchiver {
     abstract Path getPath();
 
     /**
-     * Move the file to the given destination n * @return <tt>true</tt> on success n
+     * Move the file to the given destination
+     * @return <tt>true</tt> on success
      */
     public boolean moveAndClose(Path dest) throws IOException {
       this.close();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/client/VersionInfoUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/client/VersionInfoUtil.java
index e9703cb8cb2..f9ef4326f7f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/client/VersionInfoUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/client/VersionInfoUtil.java
@@ -71,8 +71,7 @@ public final class VersionInfoUtil {
   }
 
   /**
-   * n * @return the passed-in <code>version</code> int as a version String (e.g. 0x0103004 is
-   * 1.3.4)
+   * Returns the passed-in <code>version</code> int as a version String (e.g. 0x0103004 is 1.3.4)
    */
   public static String versionNumberToString(final int version) {
     return String.format("%d.%d.%d", ((version >> 20) & 0xff), ((version >> 12) & 0xff),
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/constraint/Constraints.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/constraint/Constraints.java
index 25182fd457b..47c1e4d6dcb 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/constraint/Constraints.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/constraint/Constraints.java
@@ -74,8 +74,8 @@ public final class Constraints {
    * Enable constraints on a table.
    * <p>
    * Currently, if you attempt to add a constraint to the table, then Constraints will automatically
-   * be turned on. n * table description to add the processor n * If the {@link ConstraintProcessor}
-   * CP couldn't be added to the table.
+   * be turned on. table description to add the processor If the {@link ConstraintProcessor} CP
+   * couldn't be added to the table.
    */
   public static void enable(HTableDescriptor desc) throws IOException {
     // if the CP has already been loaded, do nothing
@@ -90,7 +90,7 @@ public final class Constraints {
 
   /**
    * Turn off processing constraints for a given table, even if constraints have been turned on or
-   * added. n * {@link HTableDescriptor} where to disable {@link Constraint Constraints}.
+   * added. {@link HTableDescriptor} where to disable {@link Constraint Constraints}.
    */
   public static void disable(HTableDescriptor desc) {
     desc.removeCoprocessor(ConstraintProcessor.class.getName());
@@ -100,8 +100,8 @@ public final class Constraints {
    * Remove all {@link Constraint Constraints} that have been added to the table and turn off the
    * constraint processing.
    * <p>
-   * All {@link Configuration Configurations} and their associated {@link Constraint} are removed. n
-   * * {@link HTableDescriptor} to remove {@link Constraint Constraints} from.
+   * All {@link Configuration Configurations} and their associated {@link Constraint} are removed.
+   * @param desc {@link HTableDescriptor} to remove {@link Constraint Constraints} from.
    */
   public static void remove(HTableDescriptor desc) {
     // disable constraints
@@ -124,7 +124,7 @@ public final class Constraints {
   }
 
   /**
-   * Check to see if the Constraint is currently set. n * {@link HTableDescriptor} to check n *
+   * Check to see if the Constraint is currently set. {@link HTableDescriptor} to check
    * {@link Constraint} class to check for.
    * @return <tt>true</tt> if the {@link Constraint} is present, even if it is disabled.
    *         <tt>false</tt> otherwise.
@@ -158,10 +158,9 @@ public final class Constraints {
    * Each constraint, when added to the table, will have a specific priority, dictating the order in
    * which the {@link Constraint} will be run. A {@link Constraint} earlier in the list will be run
    * before those later in the list. The same logic applies between two Constraints over time
-   * (earlier added is run first on the regionserver). n * {@link HTableDescriptor} to add
-   * {@link Constraint Constraints} n * {@link Constraint Constraints} to add. All constraints are
-   * considered automatically enabled on add n * If constraint could not be serialized/added to
-   * table
+   * (earlier added is run first on the regionserver). {@link HTableDescriptor} to add
+   * {@link Constraint Constraints} {@link Constraint Constraints} to add. All constraints are
+   * considered automatically enabled on add If constraint could not be serialized/added to table
    */
   public static void add(HTableDescriptor desc, Class<? extends Constraint>... constraints)
     throws IOException {
@@ -184,10 +183,10 @@ public final class Constraints {
    * Each constraint, when added to the table, will have a specific priority, dictating the order in
    * which the {@link Constraint} will be run. A {@link Constraint} earlier in the list will be run
    * before those later in the list. The same logic applies between two Constraints over time
-   * (earlier added is run first on the regionserver). n * {@link HTableDescriptor} to add a
-   * {@link Constraint} n * {@link Pair} of a {@link Constraint} and its associated
+   * (earlier added is run first on the regionserver). {@link HTableDescriptor} to add a
+   * {@link Constraint} {@link Pair} of a {@link Constraint} and its associated
    * {@link Configuration}. The Constraint will be configured on load with the specified
-   * configuration.All constraints are considered automatically enabled on add n * if any constraint
+   * configuration.All constraints are considered automatically enabled on add if any constraint
    * could not be deserialized. Assumes if 1 constraint is not loaded properly, something has gone
    * terribly wrong and that all constraints need to be enforced.
    */
@@ -206,10 +205,10 @@ public final class Constraints {
    * <p>
    * Each constraint, when added to the table, will have a specific priority, dictating the order in
    * which the {@link Constraint} will be run. A {@link Constraint} added will run on the
-   * regionserver before those added to the {@link HTableDescriptor} later. n * table descriptor to
-   * the constraint to n * to be added n * configuration associated with the constraint n * if any
-   * constraint could not be deserialized. Assumes if 1 constraint is not loaded properly, something
-   * has gone terribly wrong and that all constraints need to be enforced.
+   * regionserver before those added to the {@link HTableDescriptor} later. table descriptor to the
+   * constraint to to be added configuration associated with the constraint if any constraint could
+   * not be deserialized. Assumes if 1 constraint is not loaded properly, something has gone
+   * terribly wrong and that all constraints need to be enforced.
    */
   public static void add(HTableDescriptor desc, Class<? extends Constraint> constraint,
     Configuration conf) throws IOException {
@@ -234,9 +233,8 @@ public final class Constraints {
   }
 
   /**
-   * Setup the configuration for a constraint as to whether it is enabled and its priority n * on
-   * which to base the new configuration n * <tt>true</tt> if it should be run n * relative to other
-   * constraints
+   * Setup the configuration for a constraint as to whether it is enabled and its priority on which
+   * to base the new configuration <tt>true</tt> if it should be run relative to other constraints
    * @return a new configuration, storable in the {@link HTableDescriptor}
    */
   private static Configuration configure(Configuration conf, boolean enabled, long priority) {
@@ -257,7 +255,7 @@ public final class Constraints {
 
   /**
    * Just write the class to a String representation of the class as a key for the
-   * {@link HTableDescriptor} n * Constraint class to convert to a {@link HTableDescriptor} key
+   * {@link HTableDescriptor} Constraint class to convert to a {@link HTableDescriptor} key
    * @return key to store in the {@link HTableDescriptor}
    */
   private static String serializeConstraintClass(Class<? extends Constraint> clazz) {
@@ -275,8 +273,8 @@ public final class Constraints {
   }
 
   /**
-   * Write the configuration to a String n * to write
-   * @return String representation of that configuration n
+   * Write the configuration to a String to write
+   * @return String representation of that configuration
    */
   private static String serializeConfiguration(Configuration conf) throws IOException {
     // write the configuration out to the data stream
@@ -289,7 +287,7 @@ public final class Constraints {
   }
 
   /**
-   * Read the {@link Configuration} stored in the byte stream. n * to read from
+   * Read the {@link Configuration} stored in the byte stream. to read from
    * @return A valid configuration
    */
   private static Configuration readConfiguration(byte[] bytes) throws IOException {
@@ -300,8 +298,8 @@ public final class Constraints {
   }
 
   /**
-   * Read in the configuration from the String encoded configuration n * to read from
-   * @return A valid configuration n * if the configuration could not be read
+   * Read in the configuration from the String encoded configuration to read from
+   * @return A valid configuration if the configuration could not be read
    */
   private static Configuration readConfiguration(String bytes) throws IOException {
     return readConfiguration(Bytes.toBytes(bytes));
@@ -328,9 +326,9 @@ public final class Constraints {
 
   /**
    * Update the configuration for the {@link Constraint}; does not change the order in which the
-   * constraint is run. n * {@link HTableDescriptor} to update n * {@link Constraint} to update n *
-   * to update the {@link Constraint} with. n * if the Constraint was not stored correctly n * if
-   * the Constraint was not present on this table.
+   * constraint is run. {@link HTableDescriptor} to update {@link Constraint} to update to update
+   * the {@link Constraint} with. if the Constraint was not stored correctly if the Constraint was
+   * not present on this table.
    */
   public static void setConfiguration(HTableDescriptor desc, Class<? extends Constraint> clazz,
     Configuration configuration) throws IOException, IllegalArgumentException {
@@ -357,8 +355,8 @@ public final class Constraints {
   }
 
   /**
-   * Remove the constraint (and associated information) for the table descriptor. n *
-   * {@link HTableDescriptor} to modify n * {@link Constraint} class to remove
+   * Remove the constraint (and associated information) for the table descriptor.
+   * {@link HTableDescriptor} to modify {@link Constraint} class to remove
    */
   public static void remove(HTableDescriptor desc, Class<? extends Constraint> clazz) {
     String key = serializeConstraintClass(clazz);
@@ -367,9 +365,8 @@ public final class Constraints {
 
   /**
    * Enable the given {@link Constraint}. Retains all the information (e.g. Configuration) for the
-   * {@link Constraint}, but makes sure that it gets loaded on the table. n *
-   * {@link HTableDescriptor} to modify n * {@link Constraint} to enable n * If the constraint
-   * cannot be properly deserialized
+   * {@link Constraint}, but makes sure that it gets loaded on the table. {@link HTableDescriptor}
+   * to modify {@link Constraint} to enable If the constraint cannot be properly deserialized
    */
   public static void enableConstraint(HTableDescriptor desc, Class<? extends Constraint> clazz)
     throws IOException {
@@ -378,9 +375,9 @@ public final class Constraints {
 
   /**
    * Disable the given {@link Constraint}. Retains all the information (e.g. Configuration) for the
-   * {@link Constraint}, but it just doesn't load the {@link Constraint} on the table. n *
-   * {@link HTableDescriptor} to modify n * {@link Constraint} to disable. n * if the constraint
-   * cannot be found
+   * {@link Constraint}, but it just doesn't load the {@link Constraint} on the table.
+   * {@link HTableDescriptor} to modify {@link Constraint} to disable. if the constraint cannot be
+   * found
    */
   public static void disableConstraint(HTableDescriptor desc, Class<? extends Constraint> clazz)
     throws IOException {
@@ -410,10 +407,10 @@ public final class Constraints {
   }
 
   /**
-   * Check to see if the given constraint is enabled. n * {@link HTableDescriptor} to check. n *
+   * Check to see if the given constraint is enabled. {@link HTableDescriptor} to check.
    * {@link Constraint} to check for
    * @return <tt>true</tt> if the {@link Constraint} is present and enabled. <tt>false</tt>
-   *         otherwise. n * If the constraint has improperly stored in the table
+   *         otherwise. If the constraint has improperly stored in the table
    */
   public static boolean enabled(HTableDescriptor desc, Class<? extends Constraint> clazz)
     throws IOException {
@@ -431,11 +428,11 @@ public final class Constraints {
   }
 
   /**
-   * Get the constraints stored in the table descriptor n * To read from n * To use when loading
-   * classes. If a special classloader is used on a region, for instance, then that should be the
-   * classloader used to load the constraints. This could also apply to unit-testing situation,
-   * where want to ensure that class is reloaded or not.
-   * @return List of configured {@link Constraint Constraints} n * if any part of reading/arguments
+   * Get the constraints stored in the table descriptor To read from To use when loading classes. If
+   * a special classloader is used on a region, for instance, then that should be the classloader
+   * used to load the constraints. This could also apply to unit-testing situation, where want to
+   * ensure that class is reloaded or not.
+   * @return List of configured {@link Constraint Constraints} if any part of reading/arguments
    *         fails
    */
   static List<? extends Constraint> getConstraints(TableDescriptor desc, ClassLoader classloader)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/SplitLogManagerCoordination.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/SplitLogManagerCoordination.java
index 29aa273b2b3..a7f813aeea0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/SplitLogManagerCoordination.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/SplitLogManagerCoordination.java
@@ -131,7 +131,7 @@ public interface SplitLogManagerCoordination {
   void deleteTask(String taskName);
 
   /**
-   * Support method to init constants such as timeout. Mostly required for UTs. n
+   * Support method to init constants such as timeout. Mostly required for UTs.
    */
   void init() throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZKSplitLogManagerCoordination.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZKSplitLogManagerCoordination.java
index d08a7238e81..f5faabc7e2d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZKSplitLogManagerCoordination.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZKSplitLogManagerCoordination.java
@@ -139,7 +139,7 @@ public class ZKSplitLogManagerCoordination extends ZKListener
    * It is possible for a task to stay in UNASSIGNED state indefinitely - say SplitLogManager wants
    * to resubmit a task. It forces the task to UNASSIGNED state but it dies before it could create
    * the RESCAN task node to signal the SplitLogWorkers to pick up the task. To prevent this
-   * scenario the SplitLogManager resubmits all orphan and UNASSIGNED tasks at startup. n
+   * scenario the SplitLogManager resubmits all orphan and UNASSIGNED tasks at startup.
    */
   private void handleUnassignedTask(String path) {
     if (ZKSplitLog.isRescanNode(watcher, path)) {
@@ -551,7 +551,7 @@ public class ZKSplitLogManagerCoordination extends ZKListener
      * partially done tasks are present. taskname is the name of the task that was put up in
      * zookeeper.
      * <p>
-     * nn * @return DONE if task completed successfully, ERR otherwise
+     * @return DONE if task completed successfully, ERR otherwise
      */
     Status finish(ServerName workerName, String taskname);
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZkSplitLogWorkerCoordination.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZkSplitLogWorkerCoordination.java
index 7acb0891dbc..6def70f9714 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZkSplitLogWorkerCoordination.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coordination/ZkSplitLogWorkerCoordination.java
@@ -374,7 +374,7 @@ public class ZkSplitLogWorkerCoordination extends ZKListener implements SplitLog
    * in a cluster.
    * <p>
    * Synchronization using <code>taskReadySeq</code> ensures that it will try to grab every task
-   * that has been put up n
+   * that has been put up
    */
   @Override
   public void taskLoop() throws InterruptedException {
@@ -534,7 +534,7 @@ public class ZkSplitLogWorkerCoordination extends ZKListener implements SplitLog
    */
   /**
    * endTask() can fail and the only way to recover out of it is for the
-   * {@link org.apache.hadoop.hbase.master.SplitLogManager} to timeout the task node. nn
+   * {@link org.apache.hadoop.hbase.master.SplitLogManager} to timeout the task node.
    */
   @Override
   public void endTask(SplitLogTask slt, LongAdder ctr, SplitTaskDetails details) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
index cc8977f4581..c1ba9e274ad 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/CoprocessorHost.java
@@ -655,7 +655,7 @@ public abstract class CoprocessorHost<C extends Coprocessor, E extends Coprocess
    * may remain shutdown if any exception occurs during next coprocessor execution which prevent
    * master/regionserver stop or cluster shutdown. (Refer:
    * <a href="https://issues.apache.org/jira/browse/HBASE-16663">HBASE-16663</a>
-   * @return true if bypaas coprocessor execution, false if not. n
+   * @return true if bypaas coprocessor execution, false if not.
    */
   protected <O> boolean execShutdown(final ObserverOperation<O> observerOperation)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java
index da9f7747ae0..a0e23f53c37 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java
@@ -491,8 +491,8 @@ public interface MasterObserver {
 
   /**
    * Called prior to unassigning a given region.
-   * @param ctx the environment to interact with the framework and master n * @param force whether
-   *            to force unassignment or not
+   * @param ctx   the environment to interact with the framework and master
+   * @param force whether to force unassignment or not
    * @deprecated in 2.4.0. replaced by preUnassign(ctx, regionInfo). removed in hbase 3. until then
    *             safe to either leave implementation here or move it to the new method. default impl
    *             of that method calls this one.
@@ -503,7 +503,7 @@ public interface MasterObserver {
 
   /**
    * Called prior to unassigning a given region.
-   * @param ctx the environment to interact with the framework and master n
+   * @param ctx the environment to interact with the framework and master
    */
   default void preUnassign(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     final RegionInfo regionInfo) throws IOException {
@@ -512,8 +512,8 @@ public interface MasterObserver {
 
   /**
    * Called after the region unassignment has been requested.
-   * @param ctx the environment to interact with the framework and master n * @param force whether
-   *            to force unassignment or not
+   * @param ctx   the environment to interact with the framework and master
+   * @param force whether to force unassignment or not
    * @deprecated in 2.4.0. replaced by postUnassign(ctx, regionInfo). removed in hbase 3. until then
    *             safe to either leave implementation here or move it to the new method. default impl
    *             of that method calls this one.
@@ -524,7 +524,7 @@ public interface MasterObserver {
 
   /**
    * Called after the region unassignment has been requested.
-   * @param ctx the environment to interact with the framework and master n
+   * @param ctx the environment to interact with the framework and master
    */
   default void postUnassign(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     final RegionInfo regionInfo) throws IOException {
@@ -533,7 +533,7 @@ public interface MasterObserver {
 
   /**
    * Called prior to marking a given region as offline.
-   * @param ctx the environment to interact with the framework and master n
+   * @param ctx the environment to interact with the framework and master
    */
   default void preRegionOffline(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     final RegionInfo regionInfo) throws IOException {
@@ -541,7 +541,7 @@ public interface MasterObserver {
 
   /**
    * Called after the region has been marked offline.
-   * @param ctx the environment to interact with the framework and master n
+   * @param ctx the environment to interact with the framework and master
    */
   default void postRegionOffline(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     final RegionInfo regionInfo) throws IOException {
@@ -619,7 +619,7 @@ public interface MasterObserver {
 
   /**
    * This will be called before update META step as part of split transaction.
-   * @param ctx the environment to interact with the framework and master nn
+   * @param ctx the environment to interact with the framework and master
    */
   default void preSplitRegionBeforeMETAAction(
     final ObserverContext<MasterCoprocessorEnvironment> ctx, final byte[] splitKey,
@@ -1345,67 +1345,72 @@ public interface MasterObserver {
   }
 
   /**
-   * Called before remove a replication peer n * @param peerId a short name that identifies the peer
+   * Called before remove a replication peer
+   * @param peerId a short name that identifies the peer
    */
   default void preRemoveReplicationPeer(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called after remove a replication peer n * @param peerId a short name that identifies the peer
+   * Called after remove a replication peer
+   * @param peerId a short name that identifies the peer
    */
   default void postRemoveReplicationPeer(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called before enable a replication peer n * @param peerId a short name that identifies the peer
+   * Called before enable a replication peer
+   * @param peerId a short name that identifies the peer
    */
   default void preEnableReplicationPeer(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called after enable a replication peer n * @param peerId a short name that identifies the peer
+   * Called after enable a replication peer
+   * @param peerId a short name that identifies the peer
    */
   default void postEnableReplicationPeer(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called before disable a replication peer n * @param peerId a short name that identifies the
-   * peer
+   * Called before disable a replication peer
+   * @param peerId a short name that identifies the peer
    */
   default void preDisableReplicationPeer(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called after disable a replication peer n * @param peerId a short name that identifies the peer
+   * Called after disable a replication peer
+   * @param peerId a short name that identifies the peer
    */
   default void postDisableReplicationPeer(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called before get the configured ReplicationPeerConfig for the specified peer n * @param peerId
-   * a short name that identifies the peer
+   * Called before get the configured ReplicationPeerConfig for the specified peer
+   * @param peerId a short name that identifies the peer
    */
   default void preGetReplicationPeerConfig(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called after get the configured ReplicationPeerConfig for the specified peer n * @param peerId
-   * a short name that identifies the peer
+   * Called after get the configured ReplicationPeerConfig for the specified peer
+   * @param peerId a short name that identifies the peer
    */
   default void postGetReplicationPeerConfig(final ObserverContext<MasterCoprocessorEnvironment> ctx,
     String peerId) throws IOException {
   }
 
   /**
-   * Called before update peerConfig for the specified peer n * @param peerId a short name that
-   * identifies the peer
+   * Called before update peerConfig for the specified peer
+   * @param peerId a short name that identifies the peer
    */
   default void preUpdateReplicationPeerConfig(
     final ObserverContext<MasterCoprocessorEnvironment> ctx, String peerId,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java
index 3fde3a99b87..bb2655655b4 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionObserver.java
@@ -570,15 +570,15 @@ public interface RegionObserver {
 
   /**
    * This will be called for region operations where read lock is acquired in
-   * {@link Region#startRegionOperation()}. n * @param operation The operation is about to be taken
-   * on the region
+   * {@link Region#startRegionOperation()}.
+   * @param operation The operation is about to be taken on the region
    */
   default void postStartRegionOperation(ObserverContext<RegionCoprocessorEnvironment> ctx,
     Operation operation) throws IOException {
   }
 
   /**
-   * Called after releasing read lock in {@link Region#closeRegionOperation()}. nn
+   * Called after releasing read lock in {@link Region#closeRegionOperation()}.
    */
   default void postCloseRegionOperation(ObserverContext<RegionCoprocessorEnvironment> ctx,
     Operation operation) throws IOException {
@@ -589,8 +589,8 @@ public interface RegionObserver {
    * batch operation fails.
    * <p>
    * Note: Do not retain references to any Cells in Mutations beyond the life of this invocation. If
-   * need a Cell reference for later use, copy the cell and use that. nn * @param success true if
-   * batch operation is successful otherwise false.
+   * need a Cell reference for later use, copy the cell and use that.
+   * @param success true if batch operation is successful otherwise false.
    */
   default void postBatchMutateIndispensably(ObserverContext<RegionCoprocessorEnvironment> ctx,
     MiniBatchOperationInProgress<Mutation> miniBatchOp, boolean success) throws IOException {
@@ -1463,8 +1463,8 @@ public interface RegionObserver {
    * @param fs     fileystem to read from
    * @param p      path to the file
    * @param in     {@link FSDataInputStreamWrapper}
-   * @param size   Full size of the file n * @param r original reference file. This will be not null
-   *               only when reading a split file.
+   * @param size   Full size of the file
+   * @param r      original reference file. This will be not null only when reading a split file.
    * @param reader the base reader, if not {@code null}, from previous RegionObserver in the chain
    * @return a Reader instance to use instead of the base reader if overriding default behavior,
    *         null otherwise
@@ -1485,8 +1485,8 @@ public interface RegionObserver {
    * @param fs     fileystem to read from
    * @param p      path to the file
    * @param in     {@link FSDataInputStreamWrapper}
-   * @param size   Full size of the file n * @param r original reference file. This will be not null
-   *               only when reading a split file.
+   * @param size   Full size of the file
+   * @param r      original reference file. This will be not null only when reading a split file.
    * @param reader the base reader instance
    * @return The reader to use
    * @deprecated For Phoenix only, StoreFileReader is not a stable interface.
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignException.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignException.java
index 19fa8adc1e3..8c02b346f3c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignException.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignException.java
@@ -49,7 +49,7 @@ public class ForeignException extends IOException {
 
   /**
    * Create a new ForeignException that can be serialized. It is assumed that this came form a local
-   * source. nn
+   * source.
    */
   public ForeignException(String source, Throwable cause) {
     super(cause);
@@ -60,7 +60,7 @@ public class ForeignException extends IOException {
 
   /**
    * Create a new ForeignException that can be serialized. It is assumed that this is locally
-   * generated. nn
+   * generated.
    */
   public ForeignException(String source, String msg) {
     super(new IllegalArgumentException(msg));
@@ -146,8 +146,8 @@ public class ForeignException extends IOException {
   }
 
   /**
-   * Takes a series of bytes and tries to generate an ForeignException instance for it. n * @return
-   * the ForeignExcpetion instance
+   * Takes a series of bytes and tries to generate an ForeignException instance for it.
+   * @return the ForeignExcpetion instance
    * @throws InvalidProtocolBufferException if there was deserialization problem this is thrown.
    */
   public static ForeignException deserialize(byte[] bytes) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.java
index 3718900cc87..09fb78468dc 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.java
@@ -40,7 +40,7 @@ public interface ForeignExceptionSnare {
 
   /**
    * Rethrow an exception currently held by the {@link ForeignExceptionSnare}. If there is no
-   * exception this is a no-op n * all exceptions from remote sources are procedure exceptions
+   * exception this is a no-op all exceptions from remote sources are procedure exceptions
    */
   void rethrowException() throws ForeignException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
index b33147d1734..7176f530616 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java
@@ -102,7 +102,7 @@ public abstract class EventHandler implements Runnable, Comparable<EventHandler>
   }
 
   /**
-   * This method is the main processing loop to be implemented by the various subclasses. n
+   * This method is the main processing loop to be implemented by the various subclasses.
    */
   public abstract void process() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/ExecutorService.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/ExecutorService.java
index 55bf2165f78..22ad0fb692f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/ExecutorService.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/executor/ExecutorService.java
@@ -205,7 +205,7 @@ public class ExecutorService {
     }
 
     /**
-     * Submit the event to the queue for handling. n
+     * Submit the event to the queue for handling.
      */
     void submit(final EventHandler event) {
       // If there is a listener for this type, make sure we call the before
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
index a88ac3d0d84..f59b4348184 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodeAssignmentHelper.java
@@ -118,7 +118,7 @@ public class FavoredNodeAssignmentHelper {
   /**
    * Update meta table with favored nodes info
    * @param regionToFavoredNodes map of RegionInfo's to their favored nodes
-   * @param connection           connection to be used n
+   * @param connection           connection to be used
    */
   public static void updateMetaWithFavoredNodesInfo(
     Map<RegionInfo, List<ServerName>> regionToFavoredNodes, Connection connection)
@@ -135,7 +135,7 @@ public class FavoredNodeAssignmentHelper {
   }
 
   /**
-   * Update meta table with favored nodes info nnn
+   * Update meta table with favored nodes info
    */
   public static void updateMetaWithFavoredNodesInfo(
     Map<RegionInfo, List<ServerName>> regionToFavoredNodes, Configuration conf) throws IOException {
@@ -181,7 +181,7 @@ public class FavoredNodeAssignmentHelper {
 
   /**
    * @param favoredNodes The PB'ed bytes of favored nodes
-   * @return the array of {@link ServerName} for the byte array of favored nodes. n
+   * @return the array of {@link ServerName} for the byte array of favored nodes.
    */
   public static ServerName[] getFavoredNodesList(byte[] favoredNodes) throws IOException {
     FavoredNodes f = FavoredNodes.parseFrom(favoredNodes);
@@ -194,9 +194,7 @@ public class FavoredNodeAssignmentHelper {
     return servers;
   }
 
-  /**
-   * n * @return PB'ed bytes of {@link FavoredNodes} generated by the server list.
-   */
+  /** Returns PB'ed bytes of {@link FavoredNodes} generated by the server list. */
   public static byte[] getFavoredNodes(List<ServerName> serverAddrList) {
     FavoredNodes.Builder f = FavoredNodes.newBuilder();
     for (ServerName s : serverAddrList) {
@@ -329,8 +327,8 @@ public class FavoredNodeAssignmentHelper {
 
   /**
    * For regions that share the primary, avoid placing the secondary and tertiary on a same RS. Used
-   * for generating new assignments for the primary/secondary/tertiary RegionServers n * @return the
-   * map of regions to the servers the region-files should be hosted on
+   * for generating new assignments for the primary/secondary/tertiary RegionServers
+   * @return the map of regions to the servers the region-files should be hosted on
    */
   public Map<RegionInfo, ServerName[]>
     placeSecondaryAndTertiaryWithRestrictions(Map<RegionInfo, ServerName> primaryRSMap) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
index 91dba6044f9..43e5f55de19 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/favored/FavoredNodesPlan.java
@@ -78,7 +78,7 @@ public class FavoredNodesPlan {
 
   /**
    * Return the position of the server in the favoredNodes list. Assumes the favoredNodes list is of
-   * size 3. n
+   * size 3.
    */
   public static Position getFavoredServerPosition(List<ServerName> favoredNodes,
     ServerName server) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/Reference.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/Reference.java
index ed3986f5883..337fde60cf7 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/Reference.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/Reference.java
@@ -67,23 +67,19 @@ public class Reference {
     bottom
   }
 
-  /**
-   * n * @return A {@link Reference} that points at top half of a an hfile
-   */
+  /** Returns A {@link Reference} that points at top half of a an hfile */
   public static Reference createTopReference(final byte[] splitRow) {
     return new Reference(splitRow, Range.top);
   }
 
-  /**
-   * n * @return A {@link Reference} that points at the bottom half of a an hfile
-   */
+  /** Returns A {@link Reference} that points at the bottom half of a an hfile */
   public static Reference createBottomReference(final byte[] splitRow) {
     return new Reference(splitRow, Range.bottom);
   }
 
   /**
    * Constructor
-   * @param splitRow This is row we are splitting around. n
+   * @param splitRow This is row we are splitting around.
    */
   Reference(final byte[] splitRow, final Range fr) {
     this.splitkey = splitRow == null ? null : KeyValueUtil.createFirstOnRow(splitRow).getKey();
@@ -102,15 +98,13 @@ public class Reference {
   }
 
   /**
-   * n
-   */
+   *   */
   public Range getFileRegion() {
     return this.region;
   }
 
   /**
-   * n
-   */
+   *   */
   public byte[] getSplitKey() {
     return splitkey;
   }
@@ -151,7 +145,8 @@ public class Reference {
   }
 
   /**
-   * Read a Reference from FileSystem. nn * @return New Reference made from passed <code>p</code> n
+   * Read a Reference from FileSystem.
+   * @return New Reference made from passed <code>p</code>
    */
   public static Reference read(final FileSystem fs, final Path p) throws IOException {
     InputStream in = fs.open(p);
@@ -198,7 +193,7 @@ public class Reference {
   /**
    * Use this when writing to a stream and you want to use the pb mergeDelimitedFrom (w/o the
    * delimiter, pb reads to EOF which may not be what you want).
-   * @return This instance serialized as a delimited protobuf w/ a magic pb prefix. n
+   * @return This instance serialized as a delimited protobuf w/ a magic pb prefix.
    */
   byte[] toByteArray() throws IOException {
     return ProtobufUtil.prependPBMagic(convert().toByteArray());
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCache.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCache.java
index 1caa1b76f5f..6c05402f5a5 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCache.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCache.java
@@ -80,7 +80,7 @@ public interface BlockCache extends Iterable<CachedBlock> {
   int evictBlocksByHfileName(String hfileName);
 
   /**
-   * Get the statistics for this block cache. n
+   * Get the statistics for this block cache.
    */
   CacheStats getStats();
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCacheUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCacheUtil.java
index daa49d26a23..e6a4b609bc7 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCacheUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCacheUtil.java
@@ -74,9 +74,7 @@ public class BlockCacheUtil {
       }
     }).setPrettyPrinting().create();
 
-  /**
-   * n * @return The block content as String.
-   */
+  /** Returns The block content as String. */
   public static String toString(final CachedBlock cb, final long now) {
     return "filename=" + cb.getFilename() + ", " + toStringMinusFileName(cb, now);
   }
@@ -142,9 +140,7 @@ public class BlockCacheUtil {
     return GSON.toJson(bc);
   }
 
-  /**
-   * n * @return The block content of <code>bc</code> as a String minus the filename.
-   */
+  /** Returns The block content of <code>bc</code> as a String minus the filename. */
   public static String toStringMinusFileName(final CachedBlock cb, final long now) {
     return "offset=" + cb.getOffset() + ", size=" + cb.getSize() + ", age="
       + (now - cb.getCachedTime()) + ", type=" + cb.getBlockType() + ", priority="
@@ -281,9 +277,7 @@ public class BlockCacheUtil {
       new ConcurrentSkipListMap<>();
     FastLongHistogram hist = new FastLongHistogram();
 
-    /**
-     * n * @return True if full.... if we won't be adding any more.
-     */
+    /** Returns True if full.... if we won't be adding any more. */
     public boolean update(final CachedBlock cb) {
       if (isFull()) return true;
       NavigableSet<CachedBlock> set = this.cachedBlockByFile.get(cb.getFilename());
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CacheableDeserializer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CacheableDeserializer.java
index 2fe50381b77..4e5dfe34df6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CacheableDeserializer.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CacheableDeserializer.java
@@ -31,7 +31,7 @@ public interface CacheableDeserializer<T extends Cacheable> {
   /**
    * @param b         ByteBuff to deserialize the Cacheable.
    * @param allocator to manage NIO ByteBuffers for future allocation or de-allocation.
-   * @return T the deserialized object. n
+   * @return T the deserialized object.
    */
   T deserialize(ByteBuff b, ByteBuffAllocator allocator) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilter.java
index 0d39d09c969..26f39f6dc45 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilter.java
@@ -52,7 +52,7 @@ public class CompoundBloomFilter extends CompoundBloomFilterBase implements Bloo
   /**
    * De-serialization for compound Bloom filter metadata. Must be consistent with what
    * {@link CompoundBloomFilterWriter} does.
-   * @param meta serialized Bloom filter metadata without any magic blocks n
+   * @param meta serialized Bloom filter metadata without any magic blocks
    */
   public CompoundBloomFilter(DataInput meta, HFile.Reader reader) throws IOException {
     this.reader = reader;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilterWriter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilterWriter.java
index 84d120a5568..b0d02cb83dd 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilterWriter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CompoundBloomFilterWriter.java
@@ -82,9 +82,9 @@ public class CompoundBloomFilterWriter extends CompoundBloomFilterBase
   private BloomType bloomType;
 
   /**
-   * n * each chunk's size in bytes. The real chunk size might be different as required by the fold
-   * factor. n * target false positive rate n * hash function type to use n * maximum degree of
-   * folding allowed n * the bloom type
+   * each chunk's size in bytes. The real chunk size might be different as required by the fold
+   * factor. target false positive rate hash function type to use maximum degree of folding allowed
+   * the bloom type
    */
   public CompoundBloomFilterWriter(int chunkByteSizeHint, float errorRate, int hashType,
     int maxFold, boolean cacheOnWrite, CellComparator comparator, BloomType bloomType) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlockIndex.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlockIndex.java
index 0e886d9873c..e7aca93dc23 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlockIndex.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileBlockIndex.java
@@ -138,7 +138,7 @@ public class HFileBlockIndex {
     }
 
     /**
-     * n * from 0 to {@link #getRootBlockCount() - 1}
+     * from 0 to {@link #getRootBlockCount() - 1}
      */
     public byte[] getRootBlockKey(int i) {
       return blockKeys[i];
@@ -256,7 +256,7 @@ public class HFileBlockIndex {
     }
 
     /**
-     * n * from 0 to {@link #getRootBlockCount() - 1}
+     * from 0 to {@link #getRootBlockCount() - 1}
      */
     public Cell getRootBlockKey(int i) {
       return blockKeys[i];
@@ -524,12 +524,12 @@ public class HFileBlockIndex {
     /**
      * Return the data block which contains this key. This function will only be called when the
      * HFile version is larger than 1.
-     * @param key          the key we are looking for
-     * @param currentBlock the current block, to avoid re-reading the same block nnn * @param
-     *                     expectedDataBlockEncoding the data block encoding the caller is expecting
-     *                     the data block to be in, or null to not perform this check and return the
-     *                     block irrespective of the encoding
-     * @return reader a basic way to load blocks n
+     * @param key                       the key we are looking for
+     * @param currentBlock              the current block, to avoid re-reading the same block
+     * @param expectedDataBlockEncoding the data block encoding the caller is expecting the data
+     *                                  block to be in, or null to not perform this check and return
+     *                                  the block irrespective of the encoding
+     * @return reader a basic way to load blocks
      */
     public HFileBlock seekToDataBlock(final Cell key, HFileBlock currentBlock, boolean cacheBlocks,
       boolean pread, boolean isCompaction, DataBlockEncoding expectedDataBlockEncoding,
@@ -553,7 +553,7 @@ public class HFileBlockIndex {
      *                                  block to be in, or null to not perform this check and return
      *                                  the block irrespective of the encoding.
      * @return the BlockWithScanInfo which contains the DataBlock with other scan info such as
-     *         nextIndexedKey. n
+     *         nextIndexedKey.
      */
     public abstract BlockWithScanInfo loadDataBlockWithScanInfo(Cell key, HFileBlock currentBlock,
       boolean cacheBlocks, boolean pread, boolean isCompaction,
@@ -589,8 +589,8 @@ public class HFileBlockIndex {
     }
 
     /**
-     * Finds the root-level index block containing the given key. n * Key to find n * the comparator
-     * to be used
+     * Finds the root-level index block containing the given key. Key to find the comparator to be
+     * used
      * @return Offset of block containing <code>key</code> (between 0 and the number of blocks - 1)
      *         or -1 if this file does not contain the request.
      */
@@ -601,7 +601,7 @@ public class HFileBlockIndex {
       CellComparator comp);
 
     /**
-     * Finds the root-level index block containing the given key. n * Key to find
+     * Finds the root-level index block containing the given key. Key to find
      * @return Offset of block containing <code>key</code> (between 0 and the number of blocks - 1)
      *         or -1 if this file does not contain the request.
      */
@@ -614,13 +614,13 @@ public class HFileBlockIndex {
     }
 
     /**
-     * Finds the root-level index block containing the given key. n * Key to find
+     * Finds the root-level index block containing the given key. Key to find
      */
     public abstract int rootBlockContainingKey(final Cell key);
 
     /**
-     * The indexed key at the ith position in the nonRootIndex. The position starts at 0. n * @param
-     * i the ith position
+     * The indexed key at the ith position in the nonRootIndex. The position starts at 0.
+     * @param i the ith position
      * @return The indexed key at the ith position in the nonRootIndex.
      */
     protected byte[] getNonRootIndexedKey(ByteBuff nonRootIndex, int i) {
@@ -652,11 +652,11 @@ public class HFileBlockIndex {
 
     /**
      * Performs a binary search over a non-root level index block. Utilizes the secondary index,
-     * which records the offsets of (offset, onDiskSize, firstKey) tuples of all entries. n * the
-     * key we are searching for offsets to individual entries in the blockIndex buffer n * the
-     * non-root index block buffer, starting with the secondary index. The position is ignored.
+     * which records the offsets of (offset, onDiskSize, firstKey) tuples of all entries. the key we
+     * are searching for offsets to individual entries in the blockIndex buffer the non-root index
+     * block buffer, starting with the secondary index. The position is ignored.
      * @return the index i in [0, numEntries - 1] such that keys[i] <= key < keys[i + 1], if keys is
-     *         the array of all keys being searched, or -1 otherwise n
+     *         the array of all keys being searched, or -1 otherwise
      */
     static int binarySearchNonRootIndex(Cell key, ByteBuff nonRootIndex,
       CellComparator comparator) {
@@ -733,8 +733,8 @@ public class HFileBlockIndex {
     /**
      * Search for one key using the secondary index in a non-root block. In case of success,
      * positions the provided buffer at the entry of interest, where the file offset and the
-     * on-disk-size can be read. n * a non-root block without header. Initial position does not
-     * matter. n * the byte array containing the key
+     * on-disk-size can be read. a non-root block without header. Initial position does not matter.
+     * the byte array containing the key
      * @return the index position where the given key was found, otherwise return -1 in the case the
      *         given key is before the first key.
      */
@@ -762,7 +762,7 @@ public class HFileBlockIndex {
      * the root level by {@link BlockIndexWriter#writeIndexBlocks(FSDataOutputStream)} at the offset
      * that function returned.
      * @param in         the buffered input stream or wrapped byte input stream
-     * @param numEntries the number of root-level index entries n
+     * @param numEntries the number of root-level index entries
      */
     public void readRootIndex(DataInput in, final int numEntries) throws IOException {
       blockOffsets = new long[numEntries];
@@ -790,7 +790,7 @@ public class HFileBlockIndex {
      * that function returned.
      * @param blk        the HFile block
      * @param numEntries the number of root-level index entries
-     * @return the buffered input stream or wrapped byte input stream n
+     * @return the buffered input stream or wrapped byte input stream
      */
     public DataInputStream readRootIndex(HFileBlock blk, final int numEntries) throws IOException {
       DataInputStream in = blk.getByteStream();
@@ -803,7 +803,7 @@ public class HFileBlockIndex {
      * {@link #readRootIndex(DataInput, int)}, but also reads metadata necessary to compute the
      * mid-key in a multi-level index.
      * @param blk        the HFile block
-     * @param numEntries the number of root-level index entries n
+     * @param numEntries the number of root-level index entries
      */
     public void readMultiLevelIndexRoot(HFileBlock blk, final int numEntries) throws IOException {
       DataInputStream in = readRootIndex(blk, numEntries);
@@ -959,7 +959,7 @@ public class HFileBlockIndex {
      * there is no inline block index anymore, so we only write that level of block index to disk as
      * the root level.
      * @param out FSDataOutputStream
-     * @return position at which we entered the root-level index. n
+     * @return position at which we entered the root-level index.
      */
     public long writeIndexBlocks(FSDataOutputStream out) throws IOException {
       if (curInlineChunk != null && curInlineChunk.getNumEntries() != 0) {
@@ -1019,7 +1019,7 @@ public class HFileBlockIndex {
      * Writes the block index data as a single level only. Does not do any block framing.
      * @param out         the buffered output stream to write the index to. Typically a stream
      *                    writing into an {@link HFile} block.
-     * @param description a short description of the index being written. Used in a log message. n
+     * @param description a short description of the index being written. Used in a log message.
      */
     public void writeSingleLevelIndex(DataOutput out, String description) throws IOException {
       expectNumLevels(1);
@@ -1042,10 +1042,11 @@ public class HFileBlockIndex {
     /**
      * Split the current level of the block index into intermediate index blocks of permitted size
      * and write those blocks to disk. Return the next level of the block index referencing those
-     * intermediate-level blocks. n * @param currentLevel the current level of the block index, such
-     * as the a chunk referencing all leaf-level index blocks
+     * intermediate-level blocks.
+     * @param currentLevel the current level of the block index, such as the a chunk referencing all
+     *                     leaf-level index blocks
      * @return the parent level block index, which becomes the root index after a few (usually zero)
-     *         iterations n
+     *         iterations
      */
     private BlockIndexChunk writeIntermediateLevel(FSDataOutputStream out,
       BlockIndexChunk currentLevel) throws IOException {
@@ -1164,7 +1165,7 @@ public class HFileBlockIndex {
 
     /**
      * Write out the current inline index block. Inline blocks are non-root blocks, so the non-root
-     * index format is used. n
+     * index format is used.
      */
     @Override
     public void writeInlineBlock(DataOutput out) throws IOException {
@@ -1425,7 +1426,7 @@ public class HFileBlockIndex {
     /**
      * Writes the block index chunk in the non-root index block format. This format contains the
      * number of entries, an index of integer offsets for quick binary search on variable-length
-     * records, and tuples of block offset, on-disk block size, and the first key for each entry. nn
+     * records, and tuples of block offset, on-disk block size, and the first key for each entry.
      */
     void writeNonRoot(DataOutput out) throws IOException {
       // The number of entries in the block.
@@ -1466,7 +1467,7 @@ public class HFileBlockIndex {
      * similar to the {@link HFile} version 1 block index format, except that we store on-disk size
      * of the block instead of its uncompressed size.
      * @param out the data output stream to write the block index to. Typically a stream writing
-     *            into an {@link HFile} block. n
+     *            into an {@link HFile} block.
      */
     void writeRoot(DataOutput out) throws IOException {
       for (int i = 0; i < blockKeys.size(); ++i) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileDataBlockEncoder.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileDataBlockEncoder.java
index 7acc1a6c94a..e62646e464e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileDataBlockEncoder.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileDataBlockEncoder.java
@@ -38,20 +38,20 @@ public interface HFileDataBlockEncoder {
   /**
    * Starts encoding for a block of KeyValues. Call
    * {@link #endBlockEncoding(HFileBlockEncodingContext, DataOutputStream, byte[], BlockType)} to
-   * finish encoding of a block. nnn
+   * finish encoding of a block.
    */
   void startBlockEncoding(HFileBlockEncodingContext encodingCtx, DataOutputStream out)
     throws IOException;
 
   /**
-   * Encodes a KeyValue. nnnn
+   * Encodes a KeyValue.
    */
   void encode(Cell cell, HFileBlockEncodingContext encodingCtx, DataOutputStream out)
     throws IOException;
 
   /**
    * Ends encoding for a block of KeyValues. Gives a chance for the encoder to do the finishing
-   * stuff for the encoded block. It must be called at the end of block encoding. nnnnn
+   * stuff for the encoded block. It must be called at the end of block encoding.
    */
   void endBlockEncoding(HFileBlockEncodingContext encodingCtx, DataOutputStream out,
     byte[] uncompressedBytesWithHeader, BlockType blockType) throws IOException;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
index ec17f4fa477..c044a1179e0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
@@ -514,8 +514,8 @@ public abstract class HFileReaderImpl implements HFile.Reader, Configurable {
      * Within a loaded block, seek looking for the last key that is smaller than (or equal to?) the
      * key we are interested in. A note on the seekBefore: if you have seekBefore = true, AND the
      * first key in the block = key, then you'll get thrown exceptions. The caller has to check for
-     * that case and load the previous block as appropriate. n * the key to find n * find the key
-     * before the given key in case of exact match.
+     * that case and load the previous block as appropriate. the key to find find the key before the
+     * given key in case of exact match.
      * @return 0 in case of an exact key match, 1 in case of an inexact match, -2 in case of an
      *         inexact match and furthermore, the input key less than the first key of current
      *         block(e.g. using a faked index key)
@@ -1636,10 +1636,11 @@ public abstract class HFileReaderImpl implements HFile.Reader, Configurable {
   /**
    * Create a Scanner on this file. No seeks or reads are done on creation. Call
    * {@link HFileScanner#seekTo(Cell)} to position an start the read. There is nothing to clean up
-   * in a Scanner. Letting go of your references to the scanner is sufficient. n * True if we should
-   * cache blocks read in by this scanner. n * Use positional read rather than seek+read if true
-   * (pread is better for random reads, seek+read is better scanning). n * is scanner being used for
-   * a compaction?
+   * in a Scanner. Letting go of your references to the scanner is sufficient.
+   * @param cacheBlocks  True if we should cache blocks read in by this scanner.
+   * @param pread        Use positional read rather than seek+read if true (pread is better for
+   *                     random reads, seek+read is better scanning).
+   * @param isCompaction is scanner being used for a compaction?
    * @return Scanner on this file.
    */
   @Override
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileScanner.java
index e77b133523f..fd5c66b126b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileScanner.java
@@ -39,12 +39,13 @@ public interface HFileScanner extends Shipper, Closeable {
   /**
    * SeekTo or just before the passed <code>cell</code>. Examine the return code to figure whether
    * we found the cell or not. Consider the cell stream of all the cells in the file,
-   * <code>c[0] .. c[n]</code>, where there are n cells in the file. n * @return -1, if cell &lt;
-   * c[0], no position; 0, such that c[i] = cell and scanner is left in position i; and 1, such that
-   * c[i] &lt; cell, and scanner is left in position i. The scanner will position itself between
-   * c[i] and c[i+1] where c[i] &lt; cell &lt;= c[i+1]. If there is no cell c[i+1] greater than or
-   * equal to the input cell, then the scanner will position itself at the end of the file and
-   * next() will return false when it is called. n
+   * <code>c[0] .. c[n]</code>, where there are n cells in the file.
+   * @return -1, if cell &lt; c[0], no position; 0, such that c[i] = cell and scanner is left in
+   *         position i; and 1, such that c[i] &lt; cell, and scanner is left in position i. The
+   *         scanner will position itself between c[i] and c[i+1] where c[i] &lt; cell &lt;= c[i+1].
+   *         If there is no cell c[i+1] greater than or equal to the input cell, then the scanner
+   *         will position itself at the end of the file and next() will return false when it is
+   *         called.
    */
   int seekTo(Cell cell) throws IOException;
 
@@ -59,7 +60,7 @@ public interface HFileScanner extends Shipper, Closeable {
    * false when it is called.
    * @param cell Cell to find (should be non-null)
    * @return -1, if cell &lt; c[0], no position; 0, such that c[i] = cell and scanner is left in
-   *         position i; and 1, such that c[i] &lt; cell, and scanner is left in position i. n
+   *         position i; and 1, such that c[i] &lt; cell, and scanner is left in position i.
    */
   int reseekTo(Cell cell) throws IOException;
 
@@ -69,20 +70,20 @@ public interface HFileScanner extends Shipper, Closeable {
    * @param cell Cell to find
    * @return false if cell &lt;= c[0] or true with scanner in position 'i' such that: c[i] &lt;
    *         cell. Furthermore: there may be a c[i+1], such that c[i] &lt; cell &lt;= c[i+1] but
-   *         there may also NOT be a c[i+1], and next() will return false (EOF). n
+   *         there may also NOT be a c[i+1], and next() will return false (EOF).
    */
   boolean seekBefore(Cell cell) throws IOException;
 
   /**
    * Positions this scanner at the start of the file.
    * @return False if empty file; i.e. a call to next would return false and the current key and
-   *         value are undefined. n
+   *         value are undefined.
    */
   boolean seekTo() throws IOException;
 
   /**
    * Scans to the next entry in the file.
-   * @return Returns false if you are at the end otherwise true if more in file. n
+   * @return Returns false if you are at the end otherwise true if more in file.
    */
   boolean next() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterImpl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterImpl.java
index 2f6fb972648..3c59dc04dcc 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterImpl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileWriterImpl.java
@@ -558,8 +558,8 @@ public class HFileWriterImpl implements HFile.Writer {
    * Add a meta block to the end of the file. Call before close(). Metadata blocks are expensive.
    * Fill one with a bunch of serialized data rather than do a metadata block per metadata instance.
    * If metadata is small, consider adding to file info using
-   * {@link #appendFileInfo(byte[], byte[])} n * name of the block n * will call readFields to get
-   * data later (DO NOT REUSE)
+   * {@link #appendFileInfo(byte[], byte[])} name of the block will call readFields to get data
+   * later (DO NOT REUSE)
    */
   @Override
   public void appendMetaBlock(String metaBlockName, Writable content) {
@@ -705,7 +705,7 @@ public class HFileWriterImpl implements HFile.Writer {
 
   /**
    * Add key/value to file. Keys must be added in an order that agrees with the Comparator passed on
-   * construction. n * Cell to add. Cannot be empty nor null.
+   * construction. Cell to add. Cannot be empty nor null.
    */
   @Override
   public void append(final Cell cell) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/InlineBlockWriter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/InlineBlockWriter.java
index 6b0c913ca1b..58229639309 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/InlineBlockWriter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/InlineBlockWriter.java
@@ -30,16 +30,15 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface InlineBlockWriter {
 
   /**
-   * Determines whether there is a new block to be written out. n * whether the file is being
-   * closed, in which case we need to write out all available data and not wait to accumulate
-   * another block
+   * Determines whether there is a new block to be written out. whether the file is being closed, in
+   * which case we need to write out all available data and not wait to accumulate another block
    */
   boolean shouldWriteBlock(boolean closing);
 
   /**
    * Writes the block to the provided stream. Must not write any magic records. Called only if
-   * {@link #shouldWriteBlock(boolean)} returned true. n * a stream (usually a compressing stream)
-   * to write the block to
+   * {@link #shouldWriteBlock(boolean)} returned true. a stream (usually a compressing stream) to
+   * write the block to
    */
   void writeInlineBlock(DataOutput out) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.java
index 54032e79c6f..0b03656d701 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketAllocator.java
@@ -348,7 +348,7 @@ public final class BucketAllocator {
    * @param availableSpace capacity of cache
    * @param map            A map stores the block key and BucketEntry(block's meta data like offset,
    *                       length)
-   * @param realCacheSize  cached data size statistics for bucket cache n
+   * @param realCacheSize  cached data size statistics for bucket cache
    */
   BucketAllocator(long availableSpace, int[] bucketSizes, Map<BlockCacheKey, BucketEntry> map,
     LongAdder realCacheSize) throws BucketAllocatorException {
@@ -444,7 +444,8 @@ public final class BucketAllocator {
 
   /**
    * Allocate a block with specified size. Return the offset
-   * @param blockSize size of block nn * @return the offset in the IOEngine
+   * @param blockSize size of block
+   * @return the offset in the IOEngine
    */
   public synchronized long allocateBlock(int blockSize)
     throws CacheFullException, BucketAllocatorException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java
index 34e2690ab1f..8ac6e6ee331 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.java
@@ -367,7 +367,8 @@ public class BucketCache implements BlockCache, HeapSize {
   }
 
   /**
-   * Get the IOEngine from the IO engine name nnn * @return the IOEngine n
+   * Get the IOEngine from the IO engine name
+   * @return the IOEngine
    */
   private IOEngine getIOEngineFromName(String ioEngineName, long capacity, String persistencePath)
     throws IOException {
@@ -1521,7 +1522,7 @@ public class BucketCache implements BlockCache, HeapSize {
   }
 
   /**
-   * Only used in test n
+   * Only used in test
    */
   void stopWriterThreads() throws InterruptedException {
     for (WriterThread writerThread : writerThreads) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/ByteBufferIOEngine.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/ByteBufferIOEngine.java
index 78166e88ffd..6dc3742a660 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/ByteBufferIOEngine.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/ByteBufferIOEngine.java
@@ -64,8 +64,8 @@ public class ByteBufferIOEngine implements IOEngine {
   private final long capacity;
 
   /**
-   * Construct the ByteBufferIOEngine with the given capacity n * @throws IOException ideally here
-   * no exception to be thrown from the allocator
+   * Construct the ByteBufferIOEngine with the given capacity
+   * @throws IOException ideally here no exception to be thrown from the allocator
    */
   public ByteBufferIOEngine(long capacity) throws IOException {
     this.capacity = capacity;
@@ -80,7 +80,7 @@ public class ByteBufferIOEngine implements IOEngine {
   }
 
   /**
-   * Memory IO engine is always unable to support persistent storage for the cache n
+   * Memory IO engine is always unable to support persistent storage for the cache
    */
   @Override
   public boolean isPersistent() {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
index 511d8afff46..370343b1b25 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.java
@@ -110,7 +110,7 @@ public class FileIOEngine extends PersistentIOEngine {
   }
 
   /**
-   * File IO engine is always able to support persistent storage for the cache n
+   * File IO engine is always able to support persistent storage for the cache
    */
   @Override
   public boolean isPersistent() {
@@ -162,7 +162,7 @@ public class FileIOEngine extends PersistentIOEngine {
   /**
    * Transfers data from the given byte buffer to file
    * @param srcBuffer the given byte buffer from which bytes are to be read
-   * @param offset    The offset in the file where the first byte to be written n
+   * @param offset    The offset in the file where the first byte to be written
    */
   @Override
   public void write(ByteBuffer srcBuffer, long offset) throws IOException {
@@ -170,7 +170,7 @@ public class FileIOEngine extends PersistentIOEngine {
   }
 
   /**
-   * Sync the data to file after writing n
+   * Sync the data to file after writing
    */
   @Override
   public void sync() throws IOException {
@@ -254,8 +254,8 @@ public class FileIOEngine extends PersistentIOEngine {
   }
 
   /**
-   * Get the absolute offset in given file with the relative global offset. nn * @return the
-   * absolute offset
+   * Get the absolute offset in given file with the relative global offset.
+   * @return the absolute offset
    */
   private long getAbsoluteOffsetInFile(int fileNum, long globalOffset) {
     return globalOffset - fileNum * sizePerFile;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileMmapIOEngine.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileMmapIOEngine.java
index b09e0963ca2..b7066f149fd 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileMmapIOEngine.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/FileMmapIOEngine.java
@@ -95,7 +95,7 @@ public abstract class FileMmapIOEngine extends PersistentIOEngine {
   }
 
   /**
-   * File IO engine is always able to support persistent storage for the cache n
+   * File IO engine is always able to support persistent storage for the cache
    */
   @Override
   public boolean isPersistent() {
@@ -109,7 +109,7 @@ public abstract class FileMmapIOEngine extends PersistentIOEngine {
   /**
    * Transfers data from the given byte buffer to file
    * @param srcBuffer the given byte buffer from which bytes are to be read
-   * @param offset    The offset in the file where the first byte to be written n
+   * @param offset    The offset in the file where the first byte to be written
    */
   @Override
   public void write(ByteBuffer srcBuffer, long offset) throws IOException {
@@ -122,7 +122,7 @@ public abstract class FileMmapIOEngine extends PersistentIOEngine {
   }
 
   /**
-   * Sync the data to file after writing n
+   * Sync the data to file after writing
    */
   @Override
   public void sync() throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.java
index a7b73a5d886..46112da3f2c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.java
@@ -52,19 +52,19 @@ public interface IOEngine {
   /**
    * Transfers data from the given byte buffer to IOEngine
    * @param srcBuffer the given byte buffer from which bytes are to be read
-   * @param offset    The offset in the IO engine where the first byte to be written n
+   * @param offset    The offset in the IO engine where the first byte to be written
    */
   void write(ByteBuffer srcBuffer, long offset) throws IOException;
 
   /**
    * Transfers the data from the given MultiByteBuffer to IOEngine
    * @param srcBuffer the given MultiBytebufffers from which bytes are to be read
-   * @param offset    the offset in the IO engine where the first byte to be written n
+   * @param offset    the offset in the IO engine where the first byte to be written
    */
   void write(ByteBuff srcBuffer, long offset) throws IOException;
 
   /**
-   * Sync the data to IOEngine after writing n
+   * Sync the data to IOEngine after writing
    */
   void sync() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/util/MemorySizeUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/util/MemorySizeUtil.java
index 2b69bbce175..d281d805d6b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/io/util/MemorySizeUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/io/util/MemorySizeUtil.java
@@ -77,7 +77,7 @@ public class MemorySizeUtil {
 
   /**
    * Checks whether we have enough heap memory left out after portion for Memstore and Block cache.
-   * We need atleast 20% of heap left out for other RS functions. n
+   * We need atleast 20% of heap left out for other RS functions.
    */
   public static void checkForClusterFreeHeapMemoryLimit(Configuration conf) {
     if (conf.get(MEMSTORE_SIZE_OLD_KEY) != null) {
@@ -102,7 +102,7 @@ public class MemorySizeUtil {
   }
 
   /**
-   * Retrieve global memstore configured size as percentage of total heap. nn
+   * Retrieve global memstore configured size as percentage of total heap.
    */
   public static float getGlobalMemStoreHeapPercent(final Configuration c,
     final boolean logInvalid) {
@@ -178,7 +178,8 @@ public class MemorySizeUtil {
 
   /**
    * Returns the onheap global memstore limit based on the config
-   * 'hbase.regionserver.global.memstore.size'. n * @return the onheap global memstore limt
+   * 'hbase.regionserver.global.memstore.size'.
+   * @return the onheap global memstore limt
    */
   public static long getOnheapGlobalMemStoreSize(Configuration conf) {
     long max = -1L;
@@ -191,7 +192,7 @@ public class MemorySizeUtil {
   }
 
   /**
-   * Retrieve configured size for on heap block cache as percentage of total heap. n
+   * Retrieve configured size for on heap block cache as percentage of total heap.
    */
   public static float getBlockCacheHeapPercent(final Configuration conf) {
     // L1 block cache is always on heap
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/PriorityFunction.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/PriorityFunction.java
index ef19dea2dfb..2c9fb0b2a2e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/PriorityFunction.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/PriorityFunction.java
@@ -34,13 +34,15 @@ import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.RequestHeader
 public interface PriorityFunction {
   /**
    * Returns the 'priority type' of the specified request. The returned value is mainly used to
-   * select the dispatch queue. nnn * @return Priority of this request.
+   * select the dispatch queue.
+   * @return Priority of this request.
    */
   int getPriority(RequestHeader header, Message param, User user);
 
   /**
    * Returns the deadline of the specified request. The returned value is used to sort the dispatch
-   * queue. nn * @return Deadline of this request. 0 now, otherwise msec of 'delay'
+   * queue.
+   * @return Deadline of this request. 0 now, otherwise msec of 'delay'
    */
   long getDeadline(RequestHeader header, Message param);
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCall.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCall.java
index 59008cb08a4..197ddb71d7e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCall.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCall.java
@@ -96,7 +96,7 @@ public interface RpcCall extends RpcCallContext {
 
   /**
    * Send the response of this RPC call. Implementation provides the underlying facility
-   * (connection, etc) to send. n
+   * (connection, etc) to send.
    */
   void sendResponseIfReady() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCallContext.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCallContext.java
index 95843652abe..479a83f914a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCallContext.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcCallContext.java
@@ -68,7 +68,7 @@ public interface RpcCallContext {
 
   /**
    * Sets a callback which has to be executed at the end of this RPC call. Such a callback is an
-   * optional one for any Rpc call. n
+   * optional one for any Rpc call.
    */
   void setCallBack(RpcCallback callback);
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcSchedulerContext.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcSchedulerContext.java
index bab3e80d322..d8605bb122e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcSchedulerContext.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcSchedulerContext.java
@@ -25,8 +25,7 @@ class RpcSchedulerContext extends RpcScheduler.Context {
   private final RpcServer rpcServer;
 
   /**
-   * n
-   */
+   *   */
   RpcSchedulerContext(final RpcServer rpcServer) {
     this.rpcServer = rpcServer;
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java
index 66d5b8f43d8..daa71d5983c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java
@@ -255,11 +255,13 @@ public abstract class RpcServer implements RpcServerInterface, ConfigurationObse
 
   /**
    * Constructs a server listening on the named port and address.
-   * @param server      hosting instance of {@link Server}. We will do authentications if an
-   *                    instance else pass null for no authentication check.
-   * @param name        Used keying this rpc servers' metrics and for naming the Listener thread.
-   * @param services    A list of services.
-   * @param bindAddress Where to listen nn * @param reservoirEnabled Enable ByteBufferPool or not.
+   * @param server           hosting instance of {@link Server}. We will do authentications if an
+   *                         instance else pass null for no authentication check.
+   * @param name             Used keying this rpc servers' metrics and for naming the Listener
+   *                         thread.
+   * @param services         A list of services.
+   * @param bindAddress      Where to listen
+   * @param reservoirEnabled Enable ByteBufferPool or not.
    */
   public RpcServer(final Server server, final String name,
     final List<BlockingServiceAndInterface> services, final InetSocketAddress bindAddress,
@@ -765,7 +767,6 @@ public abstract class RpcServer implements RpcServerInterface, ConfigurationObse
 
   /**
    * Returns the remote side ip address when invoked inside an RPC Returns null incase of an error.
-   * n
    */
   public static InetAddress getRemoteIp() {
     RpcCall call = CurCall.get();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServerInterface.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServerInterface.java
index 0b06d792c8b..18bd09a5259 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServerInterface.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServerInterface.java
@@ -81,7 +81,7 @@ public interface RpcServerInterface {
   void addCallSize(long diff);
 
   /**
-   * Refresh authentication manager policy. n
+   * Refresh authentication manager policy.
    */
   void refreshAuthManager(Configuration conf, PolicyProvider pp);
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/ServerRpcConnection.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/ServerRpcConnection.java
index 8e7b44ec9f9..d10e81c4893 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/ServerRpcConnection.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/ServerRpcConnection.java
@@ -170,7 +170,7 @@ abstract class ServerRpcConnection implements Closeable {
   }
 
   /**
-   * Set up cell block codecs n
+   * Set up cell block codecs
    */
   private void setupCellBlockCodecs(final ConnectionHeader header) throws FatalConnectionException {
     // TODO: Plug in other supported decoders.
@@ -193,7 +193,7 @@ abstract class ServerRpcConnection implements Closeable {
   }
 
   /**
-   * Set up cipher for rpc encryption with Apache Commons Crypto n
+   * Set up cipher for rpc encryption with Apache Commons Crypto
    */
   private void setupCryptoCipher(final ConnectionHeader header,
     RPCProtos.ConnectionHeaderResponse.Builder chrBuilder) throws FatalConnectionException {
@@ -571,8 +571,10 @@ abstract class ServerRpcConnection implements Closeable {
   protected abstract void doRespond(RpcResponse resp) throws IOException;
 
   /**
-   * n * Has the request header and the request param and optionally encoded data buffer all in this
-   * one array. nn
+   * Has the request header and the request param and optionally encoded data buffer all in this one
+   * array.
+   * <p/>
+   * Will be overridden in tests.
    */
   protected void processRequest(ByteBuff buf) throws IOException, InterruptedException {
     long totalRequestSize = buf.limit();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcScheduler.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcScheduler.java
index 396817d3398..93a9e3ed798 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcScheduler.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcScheduler.java
@@ -55,10 +55,10 @@ public class SimpleRpcScheduler extends RpcScheduler implements ConfigurationObs
   private Abortable abortable = null;
 
   /**
-   * n * @param handlerCount the number of handler threads that will be used to process calls
+   * @param handlerCount            the number of handler threads that will be used to process calls
    * @param priorityHandlerCount    How many threads for priority handling.
-   * @param replicationHandlerCount How many threads for replication handling. n * @param priority
-   *                                Function to extract request priority.
+   * @param replicationHandlerCount How many threads for replication handling.
+   * @param priority                Function to extract request priority.
    */
   public SimpleRpcScheduler(Configuration conf, int handlerCount, int priorityHandlerCount,
     int replicationHandlerCount, int metaTransitionHandler, PriorityFunction priority,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServer.java
index 34b17197afb..186adeabfbb 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServer.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServer.java
@@ -360,11 +360,13 @@ public class SimpleRpcServer extends RpcServer {
 
   /**
    * Constructs a server listening on the named port and address.
-   * @param server      hosting instance of {@link Server}. We will do authentications if an
-   *                    instance else pass null for no authentication check.
-   * @param name        Used keying this rpc servers' metrics and for naming the Listener thread.
-   * @param services    A list of services.
-   * @param bindAddress Where to listen nn * @param reservoirEnabled Enable ByteBufferPool or not.
+   * @param server           hosting instance of {@link Server}. We will do authentications if an
+   *                         instance else pass null for no authentication check.
+   * @param name             Used keying this rpc servers' metrics and for naming the Listener
+   *                         thread.
+   * @param services         A list of services.
+   * @param bindAddress      Where to listen
+   * @param reservoirEnabled Enable ByteBufferPool or not.
    */
   public SimpleRpcServer(final Server server, final String name,
     final List<BlockingServiceAndInterface> services, final InetSocketAddress bindAddress,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServerResponder.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServerResponder.java
index b9d8d3dffc4..3043faf609e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServerResponder.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleRpcServerResponder.java
@@ -220,7 +220,7 @@ class SimpleRpcServerResponder extends Thread {
   /**
    * Process the response for this call. You need to have the lock on
    * {@link org.apache.hadoop.hbase.ipc.SimpleServerRpcConnection#responseWriteLock}
-   * @return true if we proceed the call fully, false otherwise. n
+   * @return true if we proceed the call fully, false otherwise.
    */
   private boolean processResponse(SimpleServerRpcConnection conn, RpcResponse resp)
     throws IOException {
@@ -255,8 +255,8 @@ class SimpleRpcServerResponder extends Thread {
 
   /**
    * Process all the responses for this connection
-   * @return true if all the calls were processed or that someone else is doing it. false if there *
-   *         is still some work to do. In this case, we expect the caller to delay us. n
+   * @return true if all the calls were processed or that someone else is doing it. false if there
+   *         is still some work to do. In this case, we expect the caller to delay us.
    */
   private boolean processAllResponses(final SimpleServerRpcConnection connection)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleServerRpcConnection.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleServerRpcConnection.java
index 51e1bedba57..d7c4b0317ac 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleServerRpcConnection.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/SimpleServerRpcConnection.java
@@ -145,7 +145,7 @@ class SimpleServerRpcConnection extends ServerRpcConnection {
   /**
    * Read off the wire. If there is not enough data to read, update the connection state with what
    * we have and returns.
-   * @return Returns -1 if failure (and caller will close connection), else zero or more. nn
+   * @return Returns -1 if failure (and caller will close connection), else zero or more.
    */
   public int readAndProcess() throws IOException, InterruptedException {
     // If we have not read the connection setup preamble, look to see if that is on the wire.
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
index ff4903026f6..e48fb23075f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentVerificationReport.java
@@ -295,7 +295,7 @@ public class AssignmentVerificationReport {
   }
 
   /**
-   * Use this to project the dispersion scores nnn
+   * Use this to project the dispersion scores
    */
   public void fillUpDispersion(TableName tableName, SnapshotOfRegionAssignmentFromMeta snapshot,
     FavoredNodesPlan newPlan) {
@@ -567,7 +567,8 @@ public class AssignmentVerificationReport {
 
   /**
    * Return the number of regions based on the position (primary/secondary/ tertiary) assigned to
-   * their favored nodes n * @return the number of regions
+   * their favored nodes
+   * @return the number of regions
    */
   int getNumRegionsOnFavoredNodeByPosition(FavoredNodesPlan.Position position) {
     return favoredNodes[position.ordinal()];
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/DrainingServerTracker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/DrainingServerTracker.java
index 28795eab28e..41f5709e911 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/DrainingServerTracker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/DrainingServerTracker.java
@@ -64,7 +64,7 @@ public class DrainingServerTracker extends ZKListener {
   /**
    * Starts the tracking of draining RegionServers.
    * <p>
-   * All Draining RSs will be tracked after this method is called. n
+   * All Draining RSs will be tracked after this method is called.
    */
   public void start() throws KeeperException, IOException {
     watcher.registerListener(this);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
index 5f43ee2e163..736b34b1870 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java
@@ -2905,7 +2905,8 @@ public class HMaster extends HRegionServer implements MasterServices {
   }
 
   /**
-   * Utility for constructing an instance of the passed HMaster class. n * @return HMaster instance.
+   * Utility for constructing an instance of the passed HMaster class.
+   * @return HMaster instance.
    */
   public static HMaster constructMaster(Class<? extends HMaster> masterClass,
     final Configuration conf) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/LoadBalancer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/LoadBalancer.java
index d2302e78853..725cf65c93d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/LoadBalancer.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/LoadBalancer.java
@@ -68,12 +68,12 @@ public interface LoadBalancer extends Configurable, Stoppable, ConfigurationObse
   ServerName BOGUS_SERVER_NAME = ServerName.valueOf("localhost,1,1");
 
   /**
-   * Set the current cluster status. This allows a LoadBalancer to map host name to a server n
+   * Set the current cluster status. This allows a LoadBalancer to map host name to a server
    */
   void setClusterMetrics(ClusterMetrics st);
 
   /**
-   * Set the master service. n
+   * Set the master service.
    */
   void setMasterServices(MasterServices masterServices);
 
@@ -99,14 +99,16 @@ public interface LoadBalancer extends Configurable, Stoppable, ConfigurationObse
     Map<ServerName, List<RegionInfo>> loadOfOneTable);
 
   /**
-   * Perform a Round Robin assignment of regions. nn * @return Map of servername to regioninfos
+   * Perform a Round Robin assignment of regions.
+   * @return Map of servername to regioninfos
    */
   @NonNull
   Map<ServerName, List<RegionInfo>> roundRobinAssignment(List<RegionInfo> regions,
     List<ServerName> servers) throws HBaseIOException;
 
   /**
-   * Assign regions to the previously hosting region server nn * @return List of plans
+   * Assign regions to the previously hosting region server
+   * @return List of plans
    */
   @NonNull
   Map<ServerName, List<RegionInfo>> retainAssignment(Map<RegionInfo, ServerName> regions,
@@ -114,28 +116,28 @@ public interface LoadBalancer extends Configurable, Stoppable, ConfigurationObse
 
   /**
    * Get a random region server from the list
-   * @param regionInfo Region for which this selection is being done. nn
+   * @param regionInfo Region for which this selection is being done.
    */
   ServerName randomAssignment(RegionInfo regionInfo, List<ServerName> servers)
     throws HBaseIOException;
 
   /**
-   * Initialize the load balancer. Must be called after setters. n
+   * Initialize the load balancer. Must be called after setters.
    */
   void initialize() throws HBaseIOException;
 
   /**
-   * Marks the region as online at balancer. nn
+   * Marks the region as online at balancer.
    */
   void regionOnline(RegionInfo regionInfo, ServerName sn);
 
   /**
-   * Marks the region as offline at balancer. n
+   * Marks the region as offline at balancer.
    */
   void regionOffline(RegionInfo regionInfo);
 
   /*
-   * Notification that config has changed n
+   * Notification that config has changed
    */
   @Override
   void onConfigurationChange(Configuration conf);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java
index 82fce7d9c9c..60468e38fda 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java
@@ -767,7 +767,7 @@ public class MasterCoprocessorHost
   /**
    * Invoked just before calling the split region procedure
    * @param tableName the table where the region belongs to
-   * @param splitRow  the split point n
+   * @param splitRow  the split point
    */
   public void preSplitRegion(final TableName tableName, final byte[] splitRow) throws IOException {
     execOperation(coprocEnvironments.isEmpty() ? null : new MasterObserverOperation() {
@@ -782,7 +782,7 @@ public class MasterCoprocessorHost
    * Invoked just before a split
    * @param tableName the table where the region belongs to
    * @param splitRow  the split point
-   * @param user      the user n
+   * @param user      the user
    */
   public void preSplitRegionAction(final TableName tableName, final byte[] splitRow,
     final User user) throws IOException {
@@ -798,7 +798,7 @@ public class MasterCoprocessorHost
    * Invoked just after a split
    * @param regionInfoA the new left-hand daughter region
    * @param regionInfoB the new right-hand daughter region
-   * @param user        the user n
+   * @param user        the user
    */
   public void postCompletedSplitRegionAction(final RegionInfo regionInfoA,
     final RegionInfo regionInfoB, final User user) throws IOException {
@@ -811,8 +811,8 @@ public class MasterCoprocessorHost
   }
 
   /**
-   * This will be called before update META step as part of split table region procedure. nn
-   * * @param user the user n
+   * This will be called before update META step as part of split table region procedure.
+   * @param user the user
    */
   public void preSplitBeforeMETAAction(final byte[] splitKey, final List<Mutation> metaEntries,
     final User user) throws IOException {
@@ -826,7 +826,7 @@ public class MasterCoprocessorHost
 
   /**
    * This will be called after update META step as part of split table region procedure.
-   * @param user the user n
+   * @param user the user
    */
   public void preSplitAfterMETAAction(final User user) throws IOException {
     execOperation(coprocEnvironments.isEmpty() ? null : new MasterObserverOperation(user) {
@@ -839,7 +839,7 @@ public class MasterCoprocessorHost
 
   /**
    * Invoked just after the rollback of a failed split
-   * @param user the user n
+   * @param user the user
    */
   public void postRollBackSplitRegionAction(final User user) throws IOException {
     execOperation(coprocEnvironments.isEmpty() ? null : new MasterObserverOperation(user) {
@@ -853,7 +853,7 @@ public class MasterCoprocessorHost
   /**
    * Invoked just before a merge
    * @param regionsToMerge the regions to merge
-   * @param user           the user n
+   * @param user           the user
    */
   public void preMergeRegionsAction(final RegionInfo[] regionsToMerge, final User user)
     throws IOException {
@@ -869,7 +869,7 @@ public class MasterCoprocessorHost
    * Invoked after completing merge regions operation
    * @param regionsToMerge the regions to merge
    * @param mergedRegion   the new merged region
-   * @param user           the user n
+   * @param user           the user
    */
   public void postCompletedMergeRegionsAction(final RegionInfo[] regionsToMerge,
     final RegionInfo mergedRegion, final User user) throws IOException {
@@ -885,7 +885,7 @@ public class MasterCoprocessorHost
    * Invoked before merge regions operation writes the new region to hbase:meta
    * @param regionsToMerge the regions to merge
    * @param metaEntries    the meta entry
-   * @param user           the user n
+   * @param user           the user
    */
   public void preMergeRegionsCommit(final RegionInfo[] regionsToMerge,
     final @MetaMutationAnnotation List<Mutation> metaEntries, final User user) throws IOException {
@@ -901,7 +901,7 @@ public class MasterCoprocessorHost
    * Invoked after merge regions operation writes the new region to hbase:meta
    * @param regionsToMerge the regions to merge
    * @param mergedRegion   the new merged region
-   * @param user           the user n
+   * @param user           the user
    */
   public void postMergeRegionsCommit(final RegionInfo[] regionsToMerge,
     final RegionInfo mergedRegion, final User user) throws IOException {
@@ -916,7 +916,7 @@ public class MasterCoprocessorHost
   /**
    * Invoked after rollback merge regions operation
    * @param regionsToMerge the regions to merge
-   * @param user           the user n
+   * @param user           the user
    */
   public void postRollBackMergeRegionsAction(final RegionInfo[] regionsToMerge, final User user)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
index 7803fbd9f11..f4664a98681 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterFileSystem.java
@@ -211,9 +211,9 @@ public class MasterFileSystem {
   }
 
   /**
-   * Get the rootdir. Make sure its wholesome and exists before returning. nnn * @return
-   * hbase.rootdir (after checks for existence and bootstrapping if needed populating the directory
-   * with necessary bootup files). n
+   * Get the rootdir. Make sure its wholesome and exists before returning.
+   * @return hbase.rootdir (after checks for existence and bootstrapping if needed populating the
+   *         directory with necessary bootup files).
    */
   private void checkRootDir(final Path rd, final Configuration c, final FileSystem fs)
     throws IOException {
@@ -305,7 +305,7 @@ public class MasterFileSystem {
   }
 
   /**
-   * Make sure the directories under rootDir have good permissions. Create if necessary. nn
+   * Make sure the directories under rootDir have good permissions. Create if necessary.
    */
   private void checkSubDir(final Path p, final String dirPermsConfName) throws IOException {
     FileSystem fs = p.getFileSystem(conf);
@@ -334,7 +334,7 @@ public class MasterFileSystem {
 
   /**
    * Check permissions for bulk load staging directory. This directory has special hidden
-   * permissions. Create it if necessary. n
+   * permissions. Create it if necessary.
    */
   private void checkStagingDir() throws IOException {
     Path p = new Path(this.rootdir, HConstants.BULKLOAD_STAGING_DIR_NAME);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java
index a861a7f612a..ca3b36d6d18 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java
@@ -1037,7 +1037,7 @@ public class MasterRpcServices extends RSRpcServices implements MasterService.Bl
   /**
    * Get the number of regions of the table that have been updated by the alter.
    * @return Pair indicating the number of regions updated Pair.getFirst is the regions that are yet
-   *         to be updated Pair.getSecond is the total number of regions of the table n
+   *         to be updated Pair.getSecond is the total number of regions of the table
    */
   @Override
   public GetSchemaAlterStatusResponse getSchemaAlterStatus(RpcController controller,
@@ -1064,7 +1064,7 @@ public class MasterRpcServices extends RSRpcServices implements MasterService.Bl
    * Get list of TableDescriptors for requested tables.
    * @param c   Unused (set to null).
    * @param req GetTableDescriptorsRequest that contains: - tableNames: requested tables, or if
-   *            empty, all are requested. nn
+   *            empty, all are requested.
    */
   @Override
   public GetTableDescriptorsResponse getTableDescriptors(RpcController c,
@@ -1101,7 +1101,7 @@ public class MasterRpcServices extends RSRpcServices implements MasterService.Bl
   /**
    * Get list of userspace table names
    * @param controller Unused (set to null).
-   * @param req        GetTableNamesRequest nn
+   * @param req        GetTableNamesRequest
    */
   @Override
   public GetTableNamesResponse getTableNames(RpcController controller, GetTableNamesRequest req)
@@ -1711,7 +1711,7 @@ public class MasterRpcServices extends RSRpcServices implements MasterService.Bl
   /**
    * Compact a region on the master.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -1789,7 +1789,7 @@ public class MasterRpcServices extends RSRpcServices implements MasterService.Bl
    * Compacts the mob files in the current table.
    * @param request   the request.
    * @param tableName the current table name.
-   * @return The response of the mob file compaction. n
+   * @return The response of the mob file compaction.
    */
   private CompactRegionResponse compactMob(final CompactRegionRequest request, TableName tableName)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterServices.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterServices.java
index 8f6819a65d1..2ac9cbe3125 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterServices.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterServices.java
@@ -111,7 +111,7 @@ public interface MasterServices extends Server {
 
   /**
    * Check table is modifiable; i.e. exists and is offline.
-   * @param tableName Name of table to check. nnn
+   * @param tableName Name of table to check.
    */
   // We actually throw the exceptions mentioned in the
   void checkTableModifiable(final TableName tableName)
@@ -120,8 +120,8 @@ public interface MasterServices extends Server {
   /**
    * Create a table using the given table definition.
    * @param desc      The table definition
-   * @param splitKeys Starting row keys for the initial table regions. If null nn * a single region
-   *                  is created.
+   * @param splitKeys Starting row keys for the initial table regions. If null a single region is
+   *                  created.
    */
   long createTable(final TableDescriptor desc, final byte[][] splitKeys, final long nonceGroup,
     final long nonce) throws IOException;
@@ -134,7 +134,7 @@ public interface MasterServices extends Server {
 
   /**
    * Delete a table
-   * @param tableName The table name nnn
+   * @param tableName The table name
    */
   long deleteTable(final TableName tableName, final long nonceGroup, final long nonce)
     throws IOException;
@@ -142,7 +142,7 @@ public interface MasterServices extends Server {
   /**
    * Truncate a table
    * @param tableName      The table name
-   * @param preserveSplits True if the splits should be preserved nnn
+   * @param preserveSplits True if the splits should be preserved
    */
   public long truncateTable(final TableName tableName, final boolean preserveSplits,
     final long nonceGroup, final long nonce) throws IOException;
@@ -150,21 +150,21 @@ public interface MasterServices extends Server {
   /**
    * Modify the descriptor of an existing table
    * @param tableName  The table name
-   * @param descriptor The updated table descriptor nnn
+   * @param descriptor The updated table descriptor
    */
   long modifyTable(final TableName tableName, final TableDescriptor descriptor,
     final long nonceGroup, final long nonce) throws IOException;
 
   /**
    * Enable an existing table
-   * @param tableName The table name nnn
+   * @param tableName The table name
    */
   long enableTable(final TableName tableName, final long nonceGroup, final long nonce)
     throws IOException;
 
   /**
    * Disable an existing table
-   * @param tableName The table name nnn
+   * @param tableName The table name
    */
   long disableTable(final TableName tableName, final long nonceGroup, final long nonce)
     throws IOException;
@@ -172,7 +172,7 @@ public interface MasterServices extends Server {
   /**
    * Add a new column to an existing table
    * @param tableName The table name
-   * @param column    The column definition nnn
+   * @param column    The column definition
    */
   long addColumn(final TableName tableName, final ColumnFamilyDescriptor column,
     final long nonceGroup, final long nonce) throws IOException;
@@ -180,7 +180,7 @@ public interface MasterServices extends Server {
   /**
    * Modify the column descriptor of an existing column in an existing table
    * @param tableName  The table name
-   * @param descriptor The updated column definition nnn
+   * @param descriptor The updated column definition
    */
   long modifyColumn(final TableName tableName, final ColumnFamilyDescriptor descriptor,
     final long nonceGroup, final long nonce) throws IOException;
@@ -188,7 +188,7 @@ public interface MasterServices extends Server {
   /**
    * Delete a column from an existing table
    * @param tableName  The table name
-   * @param columnName The column name nnn
+   * @param columnName The column name
    */
   long deleteColumn(final TableName tableName, final byte[] columnName, final long nonceGroup,
     final long nonce) throws IOException;
@@ -199,7 +199,7 @@ public interface MasterServices extends Server {
    * @param forcible       whether to force to merge even two regions are not adjacent
    * @param nonceGroup     used to detect duplicate
    * @param nonce          used to detect duplicate
-   * @return procedure Id n
+   * @return procedure Id
    */
   long mergeRegions(final RegionInfo[] regionsToMerge, final boolean forcible,
     final long nonceGroup, final long nonce) throws IOException;
@@ -210,7 +210,7 @@ public interface MasterServices extends Server {
    * @param splitRow   split point
    * @param nonceGroup used to detect duplicate
    * @param nonce      used to detect duplicate
-   * @return procedure Id n
+   * @return procedure Id
    */
   long splitRegion(final RegionInfo regionInfo, final byte[] splitRow, final long nonceGroup,
     final long nonce) throws IOException;
@@ -254,46 +254,46 @@ public interface MasterServices extends Server {
    * Abort a procedure.
    * @param procId                ID of the procedure
    * @param mayInterruptIfRunning if the proc completed at least one step, should it be aborted?
-   * @return true if aborted, false if procedure already completed or does not exist n
+   * @return true if aborted, false if procedure already completed or does not exist
    */
   public boolean abortProcedure(final long procId, final boolean mayInterruptIfRunning)
     throws IOException;
 
   /**
    * Get procedures
-   * @return procedure list n
+   * @return procedure list
    */
   public List<Procedure<?>> getProcedures() throws IOException;
 
   /**
    * Get locks
-   * @return lock list n
+   * @return lock list
    */
   public List<LockedResource> getLocks() throws IOException;
 
   /**
    * Get list of table descriptors by namespace
-   * @param name namespace name nn
+   * @param name namespace name
    */
   public List<TableDescriptor> listTableDescriptorsByNamespace(String name) throws IOException;
 
   /**
    * Get list of table names by namespace
    * @param name namespace name
-   * @return table names n
+   * @return table names
    */
   public List<TableName> listTableNamesByNamespace(String name) throws IOException;
 
   /**
    * @param table the table for which last successful major compaction time is queried
    * @return the timestamp of the last successful major compaction for the passed table, or 0 if no
-   *         HFile resulting from a major compaction exists n
+   *         HFile resulting from a major compaction exists
    */
   public long getLastMajorCompactionTimestamp(TableName table) throws IOException;
 
   /**
-   * n * @return the timestamp of the last successful major compaction for the passed region or 0 if
-   * no HFile resulting from a major compaction exists n
+   * Returns the timestamp of the last successful major compaction for the passed region or 0 if no
+   * HFile resulting from a major compaction exists
    */
   public long getLastMajorCompactionTimestampForRegion(byte[] regionName) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterWalManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterWalManager.java
index 3fba6442dae..29ffb05fbaf 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterWalManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterWalManager.java
@@ -155,8 +155,8 @@ public class MasterWalManager {
   }
 
   /**
-   * Get Servernames which are currently splitting; paths have a '-splitting' suffix. n * @throws
-   * IOException IOException
+   * Get Servernames which are currently splitting; paths have a '-splitting' suffix.
+   * @throws IOException IOException
    */
   public Set<ServerName> getSplittingServersFromWALDir() throws IOException {
     return getServerNamesFromWALDirPath(
@@ -165,7 +165,8 @@ public class MasterWalManager {
 
   /**
    * Get Servernames that COULD BE 'alive'; excludes those that have a '-splitting' suffix as these
-   * are already being split -- they cannot be 'alive'. n * @throws IOException IOException
+   * are already being split -- they cannot be 'alive'.
+   * @throws IOException IOException
    */
   public Set<ServerName> getLiveServersFromWALDir() throws IOException {
     return getServerNamesFromWALDirPath(
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MetricsAssignmentManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MetricsAssignmentManager.java
index eaf335e52ef..43407f447f1 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MetricsAssignmentManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/MetricsAssignmentManager.java
@@ -55,7 +55,7 @@ public class MetricsAssignmentManager {
   }
 
   /**
-   * set new value for number of regions in transition. n
+   * set new value for number of regions in transition.
    */
   public void updateRITCount(final int ritCount) {
     assignmentManagerSource.setRIT(ritCount);
@@ -63,21 +63,21 @@ public class MetricsAssignmentManager {
 
   /**
    * update RIT count that are in this state for more than the threshold as defined by the property
-   * rit.metrics.threshold.time. n
+   * rit.metrics.threshold.time.
    */
   public void updateRITCountOverThreshold(final int ritCountOverThreshold) {
     assignmentManagerSource.setRITCountOverThreshold(ritCountOverThreshold);
   }
 
   /**
-   * update the timestamp for oldest region in transition metrics. n
+   * update the timestamp for oldest region in transition metrics.
    */
   public void updateRITOldestAge(final long timestamp) {
     assignmentManagerSource.setRITOldestAge(timestamp);
   }
 
   /**
-   * update the duration metrics of region is transition n
+   * update the duration metrics of region is transition
    */
   public void updateRitDuration(long duration) {
     assignmentManagerSource.updateRitDuration(duration);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlacementMaintainer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlacementMaintainer.java
index c9876aeb83c..df224dd2a79 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlacementMaintainer.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/RegionPlacementMaintainer.java
@@ -137,7 +137,7 @@ public class RegionPlacementMaintainer {
   }
 
   /**
-   * Verify the region placement is consistent with the assignment plan nnn
+   * Verify the region placement is consistent with the assignment plan
    */
   public List<AssignmentVerificationReport> verifyRegionPlacement(boolean isDetailMode)
     throws IOException {
@@ -169,10 +169,11 @@ public class RegionPlacementMaintainer {
   }
 
   /**
-   * Generate the assignment plan for the existing table nnnn * @param
-   * munkresForSecondaryAndTertiary if set on true the assignment plan for the tertiary and
-   * secondary will be generated with Munkres algorithm, otherwise will be generated using
-   * placeSecondaryAndTertiaryRS n
+   * Generate the assignment plan for the existing table
+   * @param munkresForSecondaryAndTertiary if set on true the assignment plan for the tertiary and
+   *                                       secondary will be generated with Munkres algorithm,
+   *                                       otherwise will be generated using
+   *                                       placeSecondaryAndTertiaryRS
    */
   private void genAssignmentPlan(TableName tableName,
     SnapshotOfRegionAssignmentFromMeta assignmentSnapshot,
@@ -571,7 +572,7 @@ public class RegionPlacementMaintainer {
   }
 
   /**
-   * Print the assignment plan to the system output stream n
+   * Print the assignment plan to the system output stream
    */
   public static void printAssignmentPlan(FavoredNodesPlan plan) {
     if (plan == null) return;
@@ -614,7 +615,7 @@ public class RegionPlacementMaintainer {
   }
 
   /**
-   * Update the assignment plan to all the region servers nn
+   * Update the assignment plan to all the region servers
    */
   private void updateAssignmentPlanToRegionServers(FavoredNodesPlan plan) throws IOException {
     LOG.info("Start to update the region servers with the new assignment plan");
@@ -730,7 +731,7 @@ public class RegionPlacementMaintainer {
    * as a string) also prints the baseline locality
    * @param movesPerTable     - how many primary regions will move per table
    * @param regionLocalityMap - locality map from FS
-   * @param newPlan           - new assignment plan n
+   * @param newPlan           - new assignment plan
    */
   public void checkDifferencesWithOldPlan(Map<TableName, Integer> movesPerTable,
     Map<String, Map<String, Float>> regionLocalityMap, FavoredNodesPlan newPlan)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
index 0267eff9d51..98a12e69217 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java
@@ -180,7 +180,7 @@ public class ServerManager {
    * @param versionNumber the version number of the new regionserver
    * @param version       the version of the new regionserver, could contain strings like "SNAPSHOT"
    * @param ia            the InetAddress from which request is received
-   * @return The ServerName we know this server as. n
+   * @return The ServerName we know this server as.
    */
   ServerName regionServerStartup(RegionServerStartupRequest request, int versionNumber,
     String version, InetAddress ia) throws IOException {
@@ -205,7 +205,7 @@ public class ServerManager {
   }
 
   /**
-   * Updates last flushed sequence Ids for the regions on server sn nn
+   * Updates last flushed sequence Ids for the regions on server sn
    */
   private void updateLastFlushedSequenceIds(ServerName sn, ServerMetrics hsl) {
     for (Entry<byte[], RegionMetrics> entry : hsl.getRegionMetrics().entrySet()) {
@@ -320,8 +320,8 @@ public class ServerManager {
    * Checks if the clock skew between the server and the master. If the clock skew exceeds the
    * configured max, it will throw an exception; if it exceeds the configured warning threshold, it
    * will log a warning but start normally.
-   * @param serverName Incoming servers's name n * @throws ClockOutOfSyncException if the skew
-   *                   exceeds the configured max value
+   * @param serverName Incoming servers's name
+   * @throws ClockOutOfSyncException if the skew exceeds the configured max value
    */
   private void checkClockSkew(final ServerName serverName, final long serverCurrentTime)
     throws ClockOutOfSyncException {
@@ -412,9 +412,7 @@ public class ServerManager {
     return builder.build();
   }
 
-  /**
-   * n * @return ServerMetrics if serverName is known else null
-   */
+  /** Returns ServerMetrics if serverName is known else null */
   public ServerMetrics getLoad(final ServerName serverName) {
     return this.onlineServers.get(serverName);
   }
@@ -616,8 +614,8 @@ public class ServerManager {
   }
 
   /**
-   * Add the server to the drain list. n * @return True if the server is added or the server is
-   * already on the drain list.
+   * Add the server to the drain list.
+   * @return True if the server is added or the server is already on the drain list.
    */
   public synchronized boolean addServerToDrainList(final ServerName sn) {
     // Warn if the server (sn) is not online. ServerName is of the form:
@@ -705,8 +703,8 @@ public class ServerManager {
   }
 
   /**
-   * n * @return Admin interface for the remote regionserver named <code>sn</code> n * @throws
-   * RetriesExhaustedException wrapping a ConnectException if failed
+   * @return Admin interface for the remote regionserver named <code>sn</code>
+   * @throws RetriesExhaustedException wrapping a ConnectException if failed
    */
   public AdminService.BlockingInterface getRsAdmin(final ServerName sn) throws IOException {
     AdminService.BlockingInterface admin = this.rsAdmins.get(sn);
@@ -753,7 +751,7 @@ public class ServerManager {
    * the master is stopped - the 'hbase.master.wait.on.regionservers.maxtostart' number of region
    * servers is reached - the 'hbase.master.wait.on.regionservers.mintostart' is reached AND there
    * have been no new region server in for 'hbase.master.wait.on.regionservers.interval' time AND
-   * the 'hbase.master.wait.on.regionservers.timeout' is reached n
+   * the 'hbase.master.wait.on.regionservers.timeout' is reached
    */
   public void waitForRegionServers(MonitoredTask status) throws InterruptedException {
     final long interval =
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java
index 5a7f7f12fb2..05b888b1806 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SnapshotOfRegionAssignmentFromMeta.java
@@ -96,7 +96,7 @@ public class SnapshotOfRegionAssignmentFromMeta {
   }
 
   /**
-   * Initialize the region assignment snapshot by scanning the hbase:meta table n
+   * Initialize the region assignment snapshot by scanning the hbase:meta table
    */
   public void initialize() throws IOException {
     LOG.info("Start to scan the hbase:meta for the current region assignment " + "snappshot");
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
index b1f067bfd82..8c91c58dbbe 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/SplitLogManager.java
@@ -110,7 +110,7 @@ public class SplitLogManager {
    * Its OK to construct this object even when region-servers are not online. It does lookup the
    * orphan tasks in coordination engine but it doesn't block waiting for them to be done.
    * @param master the master services
-   * @param conf   the HBase configuration n
+   * @param conf   the HBase configuration
    */
   public SplitLogManager(MasterServices master, Configuration conf) throws IOException {
     this.server = master;
@@ -180,7 +180,7 @@ public class SplitLogManager {
   /**
    * @param logDir one region sever wal dir path in .logs
    * @throws IOException if there was an error while splitting any log file
-   * @return cumulative size of the logfiles split n
+   * @return cumulative size of the logfiles split
    */
   public long splitLogDistributed(final Path logDir) throws IOException {
     List<Path> logDirs = new ArrayList<>();
@@ -377,9 +377,7 @@ public class SplitLogManager {
 
   }
 
-  /**
-   * nn * @return null on success, existing task on error
-   */
+  /** Returns null on success, existing task on error */
   private Task createTaskIfAbsent(String path, TaskBatch batch) {
     Task oldtask;
     // batch.installed is only changed via this function and
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/TableNamespaceManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/TableNamespaceManager.java
index e3fb960f6c8..305c2480a93 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/TableNamespaceManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/TableNamespaceManager.java
@@ -226,7 +226,7 @@ public class TableNamespaceManager implements Stoppable {
   }
 
   /**
-   * An ugly utility to be removed when refactor TableNamespaceManager. n
+   * An ugly utility to be removed when refactor TableNamespaceManager.
    */
   private static void block(final MasterServices services, final long procId)
     throws TimeoutIOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java
index 97e2d7ab7fb..cd9a33e0f3a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java
@@ -708,7 +708,7 @@ public class MergeTableRegionsProcedure
   /**
    * The procedure could be restarted from a different machine. If the variable is null, we need to
    * retrieve it.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private ServerName getServerName(final MasterProcedureEnv env) {
     if (regionLocation == null) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/LoadBalancerFactory.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/LoadBalancerFactory.java
index 912f7facffc..f0964e56fb4 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/LoadBalancerFactory.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/LoadBalancerFactory.java
@@ -38,7 +38,8 @@ public class LoadBalancerFactory {
   }
 
   /**
-   * Create a loadbalancer from the given conf. n * @return A {@link LoadBalancer}
+   * Create a loadbalancer from the given conf.
+   * @return A {@link LoadBalancer}
    */
   public static LoadBalancer getLoadBalancer(Configuration conf) {
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
index f745984add3..855ff79aa2d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/RegionLocationFinder.java
@@ -199,7 +199,7 @@ class RegionLocationFinder {
 
   /**
    * return TableDescriptor for a given tableName
-   * @param tableName the table name nn
+   * @param tableName the table name
    */
   protected TableDescriptor getTableDescriptor(TableName tableName) throws IOException {
     TableDescriptor tableDescriptor = null;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
index f74f881d1f5..13f330044f3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/cleaner/CleanerChore.java
@@ -373,9 +373,6 @@ public abstract class CleanerChore<T extends FileCleanerDelegate> extends Schedu
     return pool.getSize();
   }
 
-  /**
-   * n
-   */
   public boolean setEnabled(final boolean enabled) {
     return this.enabled.getAndSet(enabled);
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.java
index 3cdd99c032e..a513f96e50b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CloneSnapshotProcedure.java
@@ -335,7 +335,7 @@ public class CloneSnapshotProcedure extends AbstractStateMachineTableProcedure<C
 
   /**
    * Action before cloning from snapshot.
-   * @param env MasterProcedureEnv nn
+   * @param env MasterProcedureEnv
    */
   private void preCloneSnapshot(final MasterProcedureEnv env)
     throws IOException, InterruptedException {
@@ -359,7 +359,7 @@ public class CloneSnapshotProcedure extends AbstractStateMachineTableProcedure<C
 
   /**
    * Action after cloning from snapshot.
-   * @param env MasterProcedureEnv nn
+   * @param env MasterProcedureEnv
    */
   private void postCloneSnapshot(final MasterProcedureEnv env)
     throws IOException, InterruptedException {
@@ -373,7 +373,7 @@ public class CloneSnapshotProcedure extends AbstractStateMachineTableProcedure<C
 
   /**
    * Create regions in file system.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private List<RegionInfo> createFilesystemLayout(final MasterProcedureEnv env,
     final TableDescriptor tableDescriptor, final List<RegionInfo> newRegions) throws IOException {
@@ -430,7 +430,7 @@ public class CloneSnapshotProcedure extends AbstractStateMachineTableProcedure<C
 
   /**
    * Create region layout in file system.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private List<RegionInfo> createFsLayout(final MasterProcedureEnv env,
     final TableDescriptor tableDescriptor, List<RegionInfo> newRegions,
@@ -490,7 +490,7 @@ public class CloneSnapshotProcedure extends AbstractStateMachineTableProcedure<C
 
   /**
    * Add regions to hbase:meta table.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void addRegionsToMeta(final MasterProcedureEnv env) throws IOException {
     newRegions = CreateTableProcedure.addTableToMeta(env, tableDescriptor, newRegions);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateNamespaceProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateNamespaceProcedure.java
index 3a737185b76..5b1016a7809 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateNamespaceProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/CreateNamespaceProcedure.java
@@ -198,7 +198,7 @@ public class CreateNamespaceProcedure
 
   /**
    * Action before any real action of creating namespace.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private boolean prepareCreate(final MasterProcedureEnv env) throws IOException {
     if (getTableNamespaceManager(env).doesNamespaceExist(nsDescriptor.getName())) {
@@ -213,7 +213,7 @@ public class CreateNamespaceProcedure
   /**
    * Create the namespace directory
    * @param env          MasterProcedureEnv
-   * @param nsDescriptor NamespaceDescriptor n
+   * @param nsDescriptor NamespaceDescriptor
    */
   protected static void createDirectory(final MasterProcedureEnv env,
     final NamespaceDescriptor nsDescriptor) throws IOException {
@@ -225,7 +225,7 @@ public class CreateNamespaceProcedure
   /**
    * Insert the row into ns table
    * @param env          MasterProcedureEnv
-   * @param nsDescriptor NamespaceDescriptor n
+   * @param nsDescriptor NamespaceDescriptor
    */
   protected static void insertIntoNSTable(final MasterProcedureEnv env,
     final NamespaceDescriptor nsDescriptor) throws IOException {
@@ -235,7 +235,7 @@ public class CreateNamespaceProcedure
   /**
    * Update ZooKeeper.
    * @param env          MasterProcedureEnv
-   * @param nsDescriptor NamespaceDescriptor n
+   * @param nsDescriptor NamespaceDescriptor
    */
   protected static void updateZKNamespaceManager(final MasterProcedureEnv env,
     final NamespaceDescriptor nsDescriptor) throws IOException {
@@ -245,7 +245,7 @@ public class CreateNamespaceProcedure
   /**
    * Set quota for the namespace
    * @param env          MasterProcedureEnv
-   * @param nsDescriptor NamespaceDescriptor n
+   * @param nsDescriptor NamespaceDescriptor
    **/
   protected static void setNamespaceQuota(final MasterProcedureEnv env,
     final NamespaceDescriptor nsDescriptor) throws IOException {
@@ -260,7 +260,7 @@ public class CreateNamespaceProcedure
 
   /**
    * The procedure could be restarted from a different machine. If the variable is null, we need to
-   * retrieve it. n
+   * retrieve it.
    */
   private Boolean isTraceEnabled() {
     if (traceEnabled == null) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DeleteNamespaceProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DeleteNamespaceProcedure.java
index a9b2c6b8388..da13971b40a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DeleteNamespaceProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/DeleteNamespaceProcedure.java
@@ -189,7 +189,7 @@ public class DeleteNamespaceProcedure
 
   /**
    * Action before any real action of deleting namespace.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private boolean prepareDelete(final MasterProcedureEnv env) throws IOException {
     if (getTableNamespaceManager(env).doesNamespaceExist(namespaceName) == false) {
@@ -224,7 +224,7 @@ public class DeleteNamespaceProcedure
   /**
    * delete the row from namespace table
    * @param env           MasterProcedureEnv
-   * @param namespaceName name of the namespace in string format n
+   * @param namespaceName name of the namespace in string format
    */
   protected static void deleteFromNSTable(final MasterProcedureEnv env, final String namespaceName)
     throws IOException {
@@ -233,7 +233,7 @@ public class DeleteNamespaceProcedure
 
   /**
    * undo the delete
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void undoDeleteFromNSTable(final MasterProcedureEnv env) {
     try {
@@ -249,7 +249,7 @@ public class DeleteNamespaceProcedure
   /**
    * remove from ZooKeeper.
    * @param env           MasterProcedureEnv
-   * @param namespaceName name of the namespace in string format n
+   * @param namespaceName name of the namespace in string format
    */
   protected static void removeFromZKNamespaceManager(final MasterProcedureEnv env,
     final String namespaceName) throws IOException {
@@ -258,7 +258,7 @@ public class DeleteNamespaceProcedure
 
   /**
    * undo the remove from ZooKeeper
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void undoRemoveFromZKNamespaceManager(final MasterProcedureEnv env) {
     try {
@@ -274,7 +274,7 @@ public class DeleteNamespaceProcedure
   /**
    * Delete the namespace directories from the file system
    * @param env           MasterProcedureEnv
-   * @param namespaceName name of the namespace in string format n
+   * @param namespaceName name of the namespace in string format
    */
   protected static void deleteDirectory(final MasterProcedureEnv env, final String namespaceName)
     throws IOException {
@@ -299,7 +299,7 @@ public class DeleteNamespaceProcedure
 
   /**
    * undo delete directory
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void rollbackDeleteDirectory(final MasterProcedureEnv env) throws IOException {
     try {
@@ -313,7 +313,7 @@ public class DeleteNamespaceProcedure
   /**
    * remove quota for the namespace
    * @param env           MasterProcedureEnv
-   * @param namespaceName name of the namespace in string format n
+   * @param namespaceName name of the namespace in string format
    **/
   protected static void removeNamespaceQuota(final MasterProcedureEnv env,
     final String namespaceName) throws IOException {
@@ -322,7 +322,7 @@ public class DeleteNamespaceProcedure
 
   /**
    * undo remove quota for the namespace
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    **/
   private void rollbacRemoveNamespaceQuota(final MasterProcedureEnv env) throws IOException {
     try {
@@ -339,7 +339,7 @@ public class DeleteNamespaceProcedure
 
   /**
    * The procedure could be restarted from a different machine. If the variable is null, we need to
-   * retrieve it. n
+   * retrieve it.
    */
   private Boolean isTraceEnabled() {
     if (traceEnabled == null) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/EnableTableProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/EnableTableProcedure.java
index 3466bf68843..bfa2a52067b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/EnableTableProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/EnableTableProcedure.java
@@ -242,7 +242,7 @@ public class EnableTableProcedure extends AbstractStateMachineTableProcedure<Ena
    * Action before any real action of enabling table. Set the exception in the procedure instead of
    * throwing it. This approach is to deal with backward compatible with 1.0.
    * @param env MasterProcedureEnv
-   * @return whether the table passes the necessary checks n
+   * @return whether the table passes the necessary checks
    */
   private boolean prepareEnable(final MasterProcedureEnv env) throws IOException {
     boolean canTableBeEnabled = true;
@@ -278,7 +278,7 @@ public class EnableTableProcedure extends AbstractStateMachineTableProcedure<Ena
   /**
    * Action before enabling table.
    * @param env   MasterProcedureEnv
-   * @param state the procedure state nn
+   * @param state the procedure state
    */
   private void preEnable(final MasterProcedureEnv env, final EnableTableState state)
     throws IOException, InterruptedException {
@@ -288,7 +288,7 @@ public class EnableTableProcedure extends AbstractStateMachineTableProcedure<Ena
   /**
    * Mark table state to Enabling
    * @param env       MasterProcedureEnv
-   * @param tableName the target table n
+   * @param tableName the target table
    */
   protected static void setTableStateToEnabling(final MasterProcedureEnv env,
     final TableName tableName) throws IOException {
@@ -300,7 +300,7 @@ public class EnableTableProcedure extends AbstractStateMachineTableProcedure<Ena
 
   /**
    * Mark table state to Enabled
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   protected static void setTableStateToEnabled(final MasterProcedureEnv env,
     final TableName tableName) throws IOException {
@@ -313,7 +313,7 @@ public class EnableTableProcedure extends AbstractStateMachineTableProcedure<Ena
   /**
    * Action after enabling table.
    * @param env   MasterProcedureEnv
-   * @param state the procedure state nn
+   * @param state the procedure state
    */
   private void postEnable(final MasterProcedureEnv env, final EnableTableState state)
     throws IOException, InterruptedException {
@@ -323,7 +323,7 @@ public class EnableTableProcedure extends AbstractStateMachineTableProcedure<Ena
   /**
    * Coprocessor Action.
    * @param env   MasterProcedureEnv
-   * @param state the procedure state nn
+   * @param state the procedure state
    */
   private void runCoprocessorAction(final MasterProcedureEnv env, final EnableTableState state)
     throws IOException, InterruptedException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyNamespaceProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyNamespaceProcedure.java
index f42473ba7ab..7fc7b9d7256 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyNamespaceProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyNamespaceProcedure.java
@@ -179,7 +179,7 @@ public class ModifyNamespaceProcedure
 
   /**
    * Action before any real action of adding namespace.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private boolean prepareModify(final MasterProcedureEnv env) throws IOException {
     if (getTableNamespaceManager(env).doesNamespaceExist(newNsDescriptor.getName()) == false) {
@@ -201,7 +201,7 @@ public class ModifyNamespaceProcedure
 
   /**
    * Insert/update the row into namespace table
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void insertIntoNSTable(final MasterProcedureEnv env) throws IOException {
     getTableNamespaceManager(env).insertIntoNSTable(newNsDescriptor);
@@ -209,7 +209,7 @@ public class ModifyNamespaceProcedure
 
   /**
    * Update ZooKeeper.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void updateZKNamespaceManager(final MasterProcedureEnv env) throws IOException {
     getTableNamespaceManager(env).updateZKNamespaceManager(newNsDescriptor);
@@ -221,7 +221,7 @@ public class ModifyNamespaceProcedure
 
   /**
    * The procedure could be restarted from a different machine. If the variable is null, we need to
-   * retrieve it. n
+   * retrieve it.
    */
   private Boolean isTraceEnabled() {
     if (traceEnabled == null) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
index b77cf87c3c8..82fbac4a966 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/ModifyTableProcedure.java
@@ -278,7 +278,7 @@ public class ModifyTableProcedure extends AbstractStateMachineTableProcedure<Mod
 
   /**
    * Check conditions before any real action of modifying a table.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void prepareModify(final MasterProcedureEnv env) throws IOException {
     // Checks whether the table exists
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java
index db7ed7e0220..65786c36e6e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/RestoreSnapshotProcedure.java
@@ -94,7 +94,7 @@ public class RestoreSnapshotProcedure
    * Constructor
    * @param env             MasterProcedureEnv
    * @param tableDescriptor the table to operate on
-   * @param snapshot        snapshot to restore from n
+   * @param snapshot        snapshot to restore from
    */
   public RestoreSnapshotProcedure(final MasterProcedureEnv env,
     final TableDescriptor tableDescriptor, final SnapshotDescription snapshot,
@@ -318,7 +318,7 @@ public class RestoreSnapshotProcedure
 
   /**
    * Action before any real action of restoring from snapshot.
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    */
   private void prepareRestore(final MasterProcedureEnv env) throws IOException {
     final TableName tableName = getTableName();
@@ -355,7 +355,7 @@ public class RestoreSnapshotProcedure
 
   /**
    * Update descriptor
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    **/
   private void updateTableDescriptor(final MasterProcedureEnv env) throws IOException {
     env.getMasterServices().getTableDescriptors().update(modifiedTableDescriptor);
@@ -363,7 +363,7 @@ public class RestoreSnapshotProcedure
 
   /**
    * Execute the on-disk Restore
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    **/
   private void restoreSnapshot(final MasterProcedureEnv env) throws IOException {
     MasterFileSystem fileSystemManager = env.getMasterServices().getMasterFileSystem();
@@ -397,7 +397,7 @@ public class RestoreSnapshotProcedure
 
   /**
    * Apply changes to hbase:meta
-   * @param env MasterProcedureEnv n
+   * @param env MasterProcedureEnv
    **/
   private void updateMETA(final MasterProcedureEnv env) throws IOException {
     try {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/SnapshotManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/SnapshotManager.java
index acab9cefe67..a4c9d0204c5 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/SnapshotManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/snapshot/SnapshotManager.java
@@ -304,9 +304,9 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
   }
 
   /**
-   * Delete the specified snapshot n * @throws SnapshotDoesNotExistException If the specified
-   * snapshot does not exist.
-   * @throws IOException For filesystem IOExceptions
+   * Delete the specified snapshot
+   * @throws SnapshotDoesNotExistException If the specified snapshot does not exist.
+   * @throws IOException                   For filesystem IOExceptions
    */
   public void deleteSnapshot(SnapshotDescription snapshot) throws IOException {
     // check to see if it is completed
@@ -344,8 +344,8 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
   }
 
   /**
-   * Check if the specified snapshot is done n * @return true if snapshot is ready to be restored,
-   * false if it is still being taken.
+   * Check if the specified snapshot is done
+   * @return true if snapshot is ready to be restored, false if it is still being taken.
    * @throws IOException              IOException if error from HDFS or RPC
    * @throws UnknownSnapshotException if snapshot is invalid or does not exist.
    */
@@ -577,9 +577,9 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
   }
 
   /**
-   * Take a snapshot based on the enabled/disabled state of the table. n * @throws
-   * HBaseSnapshotException when a snapshot specific exception occurs.
-   * @throws IOException when some sort of generic IO exception occurs.
+   * Take a snapshot based on the enabled/disabled state of the table.
+   * @throws HBaseSnapshotException when a snapshot specific exception occurs.
+   * @throws IOException            when some sort of generic IO exception occurs.
    */
   public void takeSnapshot(SnapshotDescription snapshot) throws IOException {
     this.takingSnapshotLock.readLock().lock();
@@ -681,8 +681,9 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
   /**
    * Set the handler for the current snapshot
    * <p>
-   * Exposed for TESTING n * @param handler handler the master should use TODO get rid of this if
-   * possible, repackaging, modify tests.
+   * Exposed for TESTING
+   * @param handler handler the master should use TODO get rid of this if possible, repackaging,
+   *                modify tests.
    */
   public synchronized void setSnapshotHandlerForTesting(final TableName tableName,
     final SnapshotSentinel handler) {
@@ -726,7 +727,7 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
    * @param snapshot          Snapshot Descriptor
    * @param snapshotTableDesc Table Descriptor
    * @param nonceKey          unique identifier to prevent duplicated RPC
-   * @return procId the ID of the clone snapshot procedure n
+   * @return procId the ID of the clone snapshot procedure
    */
   private long cloneSnapshot(final SnapshotDescription reqSnapshot, final TableName tableName,
     final SnapshotDescription snapshot, final TableDescriptor snapshotTableDesc,
@@ -793,8 +794,8 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
   }
 
   /**
-   * Restore or Clone the specified snapshot n * @param nonceKey unique identifier to prevent
-   * duplicated RPC n
+   * Restore or Clone the specified snapshot
+   * @param nonceKey unique identifier to prevent duplicated RPC
    */
   public long restoreOrCloneSnapshot(final SnapshotDescription reqSnapshot, final NonceKey nonceKey,
     final boolean restoreAcl) throws IOException {
@@ -846,7 +847,7 @@ public class SnapshotManager extends MasterProcedureManager implements Stoppable
    * @param snapshotTableDesc Table Descriptor
    * @param nonceKey          unique identifier to prevent duplicated RPC
    * @param restoreAcl        true to restore acl of snapshot
-   * @return procId the ID of the restore snapshot procedure n
+   * @return procId the ID of the restore snapshot procedure
    */
   private long restoreSnapshot(final SnapshotDescription reqSnapshot, final TableName tableName,
     final SnapshotDescription snapshot, final TableDescriptor snapshotTableDesc,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/DefaultMobStoreFlusher.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/DefaultMobStoreFlusher.java
index af39a52d60c..e52c52d5a4b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/DefaultMobStoreFlusher.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/DefaultMobStoreFlusher.java
@@ -155,7 +155,7 @@ public class DefaultMobStoreFlusher extends DefaultStoreFlusher {
    * @param writer               The store file writer.
    * @param status               Task that represents the flush operation and may be updated with
    *                             status.
-   * @param throughputController A controller to avoid flush too fast. n
+   * @param throughputController A controller to avoid flush too fast.
    */
   protected void performMobFlush(MemStoreSnapshot snapshot, long cacheFlushId,
     InternalScanner scanner, StoreFileWriter writer, MonitoredTask status,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFile.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFile.java
index 755f7bb4c3f..3293208771a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFile.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFile.java
@@ -49,7 +49,7 @@ public class MobFile {
 
   /**
    * Internal use only. This is used by the sweeper.
-   * @return The store file scanner. n
+   * @return The store file scanner.
    */
   public StoreFileScanner getScanner() throws IOException {
     List<HStoreFile> sfs = new ArrayList<>();
@@ -64,7 +64,7 @@ public class MobFile {
    * Reads a cell from the mob file.
    * @param search         The cell need to be searched in the mob file.
    * @param cacheMobBlocks Should this scanner cache blocks.
-   * @return The cell in the mob file. n
+   * @return The cell in the mob file.
    */
   public MobCell readCell(Cell search, boolean cacheMobBlocks) throws IOException {
     return readCell(search, cacheMobBlocks, sf.getMaxMemStoreTS());
@@ -75,7 +75,7 @@ public class MobFile {
    * @param search         The cell need to be searched in the mob file.
    * @param cacheMobBlocks Should this scanner cache blocks.
    * @param readPt         the read point.
-   * @return The cell in the mob file. n
+   * @return The cell in the mob file.
    */
   public MobCell readCell(Cell search, boolean cacheMobBlocks, long readPt) throws IOException {
     StoreFileScanner scanner = null;
@@ -108,7 +108,7 @@ public class MobFile {
   }
 
   /**
-   * Opens the underlying reader. It's not thread-safe. Use MobFileCache.openFile() instead. n
+   * Opens the underlying reader. It's not thread-safe. Use MobFileCache.openFile() instead.
    */
   public void open() throws IOException {
     sf.initReader();
@@ -116,7 +116,7 @@ public class MobFile {
 
   /**
    * Closes the underlying reader, but do no evict blocks belonging to this file. It's not
-   * thread-safe. Use MobFileCache.closeFile() instead. n
+   * thread-safe. Use MobFileCache.closeFile() instead.
    */
   public void close() throws IOException {
     if (sf != null) {
@@ -131,7 +131,7 @@ public class MobFile {
    * @param path      The path of the underlying StoreFile.
    * @param conf      The configuration.
    * @param cacheConf The CacheConfig.
-   * @return An instance of the MobFile. n
+   * @return An instance of the MobFile.
    */
   public static MobFile create(FileSystem fs, Path path, Configuration conf, CacheConfig cacheConf)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileCache.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileCache.java
index dc2bf5c14e3..ed1803cb38d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileCache.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileCache.java
@@ -195,7 +195,7 @@ public class MobFileCache {
    * @param fs        The current file system.
    * @param path      The file path.
    * @param cacheConf The current MobCacheConfig
-   * @return A opened mob file. n
+   * @return A opened mob file.
    */
   public MobFile openFile(FileSystem fs, Path path, CacheConfig cacheConf) throws IOException {
     if (!isCacheEnabled) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileName.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileName.java
index 85f2ba480bf..cec381a1d8c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileName.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobFileName.java
@@ -48,8 +48,9 @@ public final class MobFileName {
   private static final int UUID_END_INDEX = 72;
 
   /**
-   * n * The start key. n * The string of the latest timestamp of cells in this file, the format is
-   * yyyymmdd. n * The uuid
+   * @param startKey The start key.
+   * @paran Date The string of the latest timestamp of cells in this file, the format is yyyymmdd.
+   * @param uuid The uuid
    */
   private MobFileName(byte[] startKey, String date, String uuid) {
     this.startKey = MD5Hash.getMD5AsHex(startKey, 0, startKey.length);
@@ -59,8 +60,10 @@ public final class MobFileName {
   }
 
   /**
-   * n * The md5 hex string of the start key. n * The string of the latest timestamp of cells in
-   * this file, the format is yyyymmdd. n * The uuid
+   * @param startKey The md5 hex string of the start key.
+   * @param date     The string of the latest timestamp of cells in this file, the format is
+   *                 yyyymmdd.
+   * @param uuid     The uuid
    */
   private MobFileName(String startKey, String date, String uuid) {
     this.startKey = startKey;
@@ -70,9 +73,11 @@ public final class MobFileName {
   }
 
   /**
-   * Creates an instance of MobFileName n * The md5 hex string of the start key. n * The string of
-   * the latest timestamp of cells in this file, the format is yyyymmdd.
-   * @param uuid The uuid.
+   * Creates an instance of MobFileName
+   * @param startKey The md5 hex string of the start key.
+   * @param date     The string of the latest timestamp of cells in this file, the format is
+   *                 yyyymmdd.
+   * @param uuid     The uuid.
    * @return An instance of a MobFileName.
    */
   public static MobFileName create(byte[] startKey, String date, String uuid) {
@@ -80,9 +85,11 @@ public final class MobFileName {
   }
 
   /**
-   * Creates an instance of MobFileName n * The md5 hex string of the start key. n * The string of
-   * the latest timestamp of cells in this file, the format is yyyymmdd.
-   * @param uuid The uuid.
+   * Creates an instance of MobFileName
+   * @param startKey The md5 hex string of the start key.
+   * @param date     The string of the latest timestamp of cells in this file, the format is
+   *                 yyyymmdd.
+   * @param uuid     The uuid.
    * @return An instance of a MobFileName.
    */
   public static MobFileName create(String startKey, String date, String uuid) {
@@ -105,7 +112,7 @@ public final class MobFileName {
 
   /**
    * get startKey from MobFileName.
-   * @param fileName file name. n
+   * @param fileName file name.
    */
   public static String getStartKeyFromName(final String fileName) {
     return fileName.substring(0, STARTKEY_END_INDEX);
@@ -113,7 +120,7 @@ public final class MobFileName {
 
   /**
    * get date from MobFileName.
-   * @param fileName file name. n
+   * @param fileName file name.
    */
   public static String getDateFromName(final String fileName) {
     return fileName.substring(STARTKEY_END_INDEX, DATE_END_INDEX);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobUtils.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobUtils.java
index 6a981c61f16..be6af9fe572 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobUtils.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/MobUtils.java
@@ -264,9 +264,9 @@ public final class MobUtils {
   }
 
   /**
-   * Sets the attribute of caching blocks in the scan. n * The current scan. n * True, set the
-   * attribute of caching blocks into the scan, the scanner with this scan caches blocks. False, the
-   * scanner doesn't cache blocks for this scan.
+   * Sets the attribute of caching blocks in the scan. The current scan. True, set the attribute of
+   * caching blocks into the scan, the scanner with this scan caches blocks. False, the scanner
+   * doesn't cache blocks for this scan.
    */
   public static void setCacheMobBlocks(Scan scan, boolean cacheBlocks) {
     scan.setAttribute(MobConstants.MOB_CACHE_BLOCKS, Bytes.toBytes(cacheBlocks));
@@ -451,8 +451,8 @@ public final class MobUtils {
 
   /**
    * Gets the RegionInfo of the mob files. This is a dummy region. The mob files are not saved in a
-   * region in HBase. This is only used in mob snapshot. It's internally used only. n * @return A
-   * dummy mob region info.
+   * region in HBase. This is only used in mob snapshot. It's internally used only.
+   * @return A dummy mob region info.
    */
   public static RegionInfo getMobRegionInfo(TableName tableName) {
     return RegionInfoBuilder.newBuilder(tableName).setStartKey(MobConstants.MOB_REGION_NAME_BYTES)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/MobCompactor.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/MobCompactor.java
index 998eaafaf00..bdc7157da1d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/MobCompactor.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/mob/compactions/MobCompactor.java
@@ -59,7 +59,7 @@ public abstract class MobCompactor {
 
   /**
    * Compacts the mob files for the current column family.
-   * @return The paths of new mob files generated in the compaction. n
+   * @return The paths of new mob files generated in the compaction.
    */
   public List<Path> compact() throws IOException {
     return compact(false);
@@ -68,7 +68,7 @@ public abstract class MobCompactor {
   /**
    * Compacts the mob files by compaction type for the current column family.
    * @param allFiles Whether add all mob files into the compaction.
-   * @return The paths of new mob files generated in the compaction. n
+   * @return The paths of new mob files generated in the compaction.
    */
   public List<Path> compact(boolean allFiles) throws IOException {
     return compact(Arrays.asList(fs.listStatus(mobFamilyDir)), allFiles);
@@ -78,7 +78,7 @@ public abstract class MobCompactor {
    * Compacts the candidate mob files.
    * @param files    The candidate mob files.
    * @param allFiles Whether add all mob files into the compaction.
-   * @return The paths of new mob files generated in the compaction. n
+   * @return The paths of new mob files generated in the compaction.
    */
   public abstract List<Path> compact(List<FileStatus> files, boolean allFiles) throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/monitoring/ThreadMonitoring.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/monitoring/ThreadMonitoring.java
index c08a462ed0b..321fb7e5c21 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/monitoring/ThreadMonitoring.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/monitoring/ThreadMonitoring.java
@@ -44,7 +44,7 @@ public abstract class ThreadMonitoring {
   }
 
   /**
-   * Print all of the thread's information and stack traces. nnn
+   * Print all of the thread's information and stack traces.
    */
   public static void appendThreadInfo(StringBuilder sb, ThreadInfo info, String indent) {
     boolean contention = threadBean.isThreadContentionMonitoringEnabled();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/namespace/NamespaceStateManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/namespace/NamespaceStateManager.java
index e54ea3febde..d95378f9b86 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/namespace/NamespaceStateManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/namespace/NamespaceStateManager.java
@@ -70,8 +70,8 @@ class NamespaceStateManager {
   }
 
   /**
-   * Check if adding a region violates namespace quota, if not update namespace cache. nnn * @return
-   * true, if region can be added to table.
+   * Check if adding a region violates namespace quota, if not update namespace cache.
+   * @return true, if region can be added to table.
    * @throws IOException Signals that an I/O exception has occurred.
    */
   synchronized boolean checkAndUpdateNamespaceRegionCount(TableName name, byte[] regionName,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/MasterProcedureManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/MasterProcedureManager.java
index 91bceacae09..3fe09e848d3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/MasterProcedureManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/MasterProcedureManager.java
@@ -53,14 +53,14 @@ import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.ProcedureDe
 public abstract class MasterProcedureManager extends ProcedureManager implements Stoppable {
   /**
    * Initialize a globally barriered procedure for master.
-   * @param master Master service interface nnn
+   * @param master Master service interface
    */
   public abstract void initialize(MasterServices master, MetricsMaster metricsMaster)
     throws KeeperException, IOException, UnsupportedOperationException;
 
   /**
    * Execute a distributed procedure on cluster
-   * @param desc Procedure description n
+   * @param desc Procedure description
    */
   public void execProcedure(ProcedureDescription desc) throws IOException {
   }
@@ -68,7 +68,7 @@ public abstract class MasterProcedureManager extends ProcedureManager implements
   /**
    * Execute a distributed procedure on cluster with return data.
    * @param desc Procedure description
-   * @return data returned from the procedure execution, null if no data n
+   * @return data returned from the procedure execution, null if no data
    */
   public byte[] execProcedureWithRet(ProcedureDescription desc) throws IOException {
     return null;
@@ -84,7 +84,7 @@ public abstract class MasterProcedureManager extends ProcedureManager implements
   /**
    * Check if the procedure is finished successfully
    * @param desc Procedure description
-   * @return true if the specified procedure is finished successfully n
+   * @return true if the specified procedure is finished successfully
    */
   public abstract boolean isProcedureDone(ProcedureDescription desc) throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Procedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Procedure.java
index 8eb477fb846..d823fac1aa3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Procedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Procedure.java
@@ -234,7 +234,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
 
   /**
    * Sends a message to Members to create a new {@link Subprocedure} for this Procedure and execute
-   * the {@link Subprocedure#acquireBarrier} step. n
+   * the {@link Subprocedure#acquireBarrier} step.
    */
   public void sendGlobalBarrierStart() throws ForeignException {
     // start the procedure
@@ -255,7 +255,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
    * Sends a message to all members that the global barrier condition has been satisfied. This
    * should only be executed after all members have completed its
    * {@link Subprocedure#acquireBarrier()} call successfully. This triggers the member
-   * {@link Subprocedure#insideBarrier} method. n
+   * {@link Subprocedure#insideBarrier} method.
    */
   public void sendGlobalBarrierReached() throws ForeignException {
     try {
@@ -285,7 +285,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
   //
 
   /**
-   * Call back triggered by an individual member upon successful local barrier acquisition n
+   * Call back triggered by an individual member upon successful local barrier acquisition
    */
   public void barrierAcquiredByMember(String member) {
     LOG.debug("member: '" + member + "' joining acquired barrier for procedure '" + procName
@@ -307,7 +307,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
 
   /**
    * Call back triggered by a individual member upon successful local in-barrier execution and
-   * release nn
+   * release
    */
   public void barrierReleasedByMember(String member, byte[] dataFromMember) {
     boolean removed = false;
@@ -329,7 +329,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
 
   /**
    * Waits until the entire procedure has globally completed, or has been aborted. If an exception
-   * is thrown the procedure may or not have run cleanup to trigger the completion latch yet. nn
+   * is thrown the procedure may or not have run cleanup to trigger the completion latch yet.
    */
   public void waitForCompleted() throws ForeignException, InterruptedException {
     waitForLatch(completedLatch, monitor, wakeFrequency, procName + " completed");
@@ -338,7 +338,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
   /**
    * Waits until the entire procedure has globally completed, or has been aborted. If an exception
    * is thrown the procedure may or not have run cleanup to trigger the completion latch yet.
-   * @return data returned from procedure members upon successfully completing subprocedure. nn
+   * @return data returned from procedure members upon successfully completing subprocedure.
    */
   public HashMap<String, byte[]> waitForCompletedWithRet()
     throws ForeignException, InterruptedException {
@@ -347,7 +347,7 @@ public class Procedure implements Callable<Void>, ForeignExceptionListener {
   }
 
   /**
-   * Check if the entire procedure has globally completed, or has been aborted. n
+   * Check if the entire procedure has globally completed, or has been aborted.
    */
   public boolean isCompleted() throws ForeignException {
     // Rethrow exception if any
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinator.java
index 908419a42b4..538018567c2 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinator.java
@@ -86,16 +86,16 @@ public class ProcedureCoordinator {
   }
 
   /**
-   * Default thread pool for the procedure n * @param opThreads the maximum number of threads to
-   * allow in the pool
+   * Default thread pool for the procedure
+   * @param opThreads the maximum number of threads to allow in the pool
    */
   public static ThreadPoolExecutor defaultPool(String coordName, int opThreads) {
     return defaultPool(coordName, opThreads, KEEP_ALIVE_MILLIS_DEFAULT);
   }
 
   /**
-   * Default thread pool for the procedure n * @param opThreads the maximum number of threads to
-   * allow in the pool
+   * Default thread pool for the procedure
+   * @param opThreads       the maximum number of threads to allow in the pool
    * @param keepAliveMillis the maximum time (ms) that excess idle threads will wait for new tasks
    */
   public static ThreadPoolExecutor defaultPool(String coordName, int opThreads,
@@ -107,7 +107,7 @@ public class ProcedureCoordinator {
   }
 
   /**
-   * Shutdown the thread pools and release rpc resources n
+   * Shutdown the thread pools and release rpc resources
    */
   public void close() throws IOException {
     // have to use shutdown now to break any latch waiting
@@ -220,7 +220,8 @@ public class ProcedureCoordinator {
   }
 
   /**
-   * Exposed for hooking with unit tests. nnn * @return the newly created procedure
+   * Exposed for hooking with unit tests.
+   * @return the newly created procedure
    */
   Procedure createProcedure(ForeignExceptionDispatcher fed, String procName, byte[] procArgs,
     List<String> expectedMembers) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinatorRpcs.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinatorRpcs.java
index e24f1ba1ba7..41354c2c8bc 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinatorRpcs.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureCoordinatorRpcs.java
@@ -32,8 +32,8 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface ProcedureCoordinatorRpcs extends Closeable {
 
   /**
-   * Initialize and start threads necessary to connect an implementation's rpc mechanisms. n
-   * * @return true if succeed, false if encountered initialization errors.
+   * Initialize and start threads necessary to connect an implementation's rpc mechanisms.
+   * @return true if succeed, false if encountered initialization errors.
    */
   boolean start(final ProcedureCoordinator listener);
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureMember.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureMember.java
index e2024312f2c..8f16e157898 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureMember.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ProcedureMember.java
@@ -66,16 +66,16 @@ public class ProcedureMember implements Closeable {
   }
 
   /**
-   * Default thread pool for the procedure n * @param procThreads the maximum number of threads to
-   * allow in the pool
+   * Default thread pool for the procedure
+   * @param procThreads the maximum number of threads to allow in the pool
    */
   public static ThreadPoolExecutor defaultPool(String memberName, int procThreads) {
     return defaultPool(memberName, procThreads, KEEP_ALIVE_MILLIS_DEFAULT);
   }
 
   /**
-   * Default thread pool for the procedure n * @param procThreads the maximum number of threads to
-   * allow in the pool
+   * Default thread pool for the procedure
+   * @param procThreads     the maximum number of threads to allow in the pool
    * @param keepAliveMillis the maximum time (ms) that excess idle threads will wait for new tasks
    */
   public static ThreadPoolExecutor defaultPool(String memberName, int procThreads,
@@ -97,7 +97,7 @@ public class ProcedureMember implements Closeable {
   /**
    * This is separated from execution so that we can detect and handle the case where the
    * subprocedure is invalid and inactionable due to bad info (like DISABLED snapshot type being
-   * sent here) nnn
+   * sent here)
    */
   public Subprocedure createSubprocedure(String opName, byte[] data) {
     return builder.buildSubprocedure(opName, data);
@@ -188,7 +188,7 @@ public class ProcedureMember implements Closeable {
   /**
    * Shutdown the threadpool, and wait for upto timeoutMs millis before bailing
    * @param timeoutMs timeout limit in millis
-   * @return true if successfully, false if bailed due to timeout. n
+   * @return true if successfully, false if bailed due to timeout.
    */
   boolean closeAndWait(long timeoutMs) throws InterruptedException {
     pool.shutdown();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/RegionServerProcedureManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/RegionServerProcedureManager.java
index f0b534d49ca..c298185d9e0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/RegionServerProcedureManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/RegionServerProcedureManager.java
@@ -31,7 +31,7 @@ import org.apache.zookeeper.KeeperException;
 public abstract class RegionServerProcedureManager extends ProcedureManager {
   /**
    * Initialize a globally barriered procedure for region servers.
-   * @param rss Region Server service interface n
+   * @param rss Region Server service interface
    */
   public abstract void initialize(RegionServerServices rss) throws KeeperException;
 
@@ -42,7 +42,7 @@ public abstract class RegionServerProcedureManager extends ProcedureManager {
 
   /**
    * Close <tt>this</tt> and all running procedure tasks
-   * @param force forcefully stop all running tasks n
+   * @param force forcefully stop all running tasks
    */
   public abstract void stop(boolean force) throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Subprocedure.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Subprocedure.java
index 654c89aa359..06c80742739 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Subprocedure.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/Subprocedure.java
@@ -230,7 +230,7 @@ abstract public class Subprocedure implements Callable<Void> {
    * etc) to satisfy the Procedures barrier condition. For example, this would be where to make all
    * the regions on a RS on the quiescent for an procedure that required all regions to be globally
    * quiesed. Users should override this method. If a quiescent is not required, this is overkill
-   * but can still be used to execute a procedure on all members and to propagate any exceptions. n
+   * but can still be used to execute a procedure on all members and to propagate any exceptions.
    */
   abstract public void acquireBarrier() throws ForeignException;
 
@@ -240,19 +240,19 @@ abstract public class Subprocedure implements Callable<Void> {
    * have been quiesced, and procedures that require this precondition could be implemented here.
    * The implementation should also collect the result of the subprocedure as data to be returned to
    * the coordinator upon successful completion. Users should override this method.
-   * @return the data the subprocedure wants to return to coordinator side. n
+   * @return the data the subprocedure wants to return to coordinator side.
    */
   abstract public byte[] insideBarrier() throws ForeignException;
 
   /**
    * Users should override this method. This implementation of this method should rollback and
    * cleanup any temporary or partially completed state that the {@link #acquireBarrier()} may have
-   * created. n
+   * created.
    */
   abstract public void cleanup(Exception e);
 
   /**
-   * Method to cancel the Subprocedure by injecting an exception from and external source. n
+   * Method to cancel the Subprocedure by injecting an exception from and external source.
    */
   public void cancel(String msg, Throwable cause) {
     LOG.error(msg, cause);
@@ -278,7 +278,7 @@ abstract public class Subprocedure implements Callable<Void> {
   //
 
   /**
-   * Wait for the reached global barrier notification. Package visibility for testing nn
+   * Wait for the reached global barrier notification. Package visibility for testing
    */
   void waitForReachedGlobalBarrier() throws ForeignException, InterruptedException {
     Procedure.waitForLatch(inGlobalBarrier, monitor, wakeFrequency,
@@ -286,7 +286,7 @@ abstract public class Subprocedure implements Callable<Void> {
   }
 
   /**
-   * Waits until the entire procedure has globally completed, or has been aborted. nn
+   * Waits until the entire procedure has globally completed, or has been aborted.
    */
   public void waitForLocallyCompleted() throws ForeignException, InterruptedException {
     Procedure.waitForLatch(releasedLocalBarrier, monitor, wakeFrequency,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ZKProcedureUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ZKProcedureUtil.java
index 5863da80140..33167ef4e0a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ZKProcedureUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/ZKProcedureUtil.java
@@ -218,7 +218,7 @@ public abstract class ZKProcedureUtil extends ZKListener implements Closeable {
   // --------------------------------------------------------------------------
   /**
    * Recursively print the current state of ZK (non-transactional)
-   * @param root name of the root directory in zk to print n
+   * @param root name of the root directory in zk to print
    */
   void logZKTree(String root) {
     if (!LOG.isDebugEnabled()) return;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.java
index 0daec3b711d..9c4473163c7 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/procedure/flush/RegionServerFlushTableProcedureManager.java
@@ -109,7 +109,7 @@ public class RegionServerFlushTableProcedureManager extends RegionServerProcedur
 
   /**
    * Close <tt>this</tt> and all running tasks
-   * @param force forcefully stop all running tasks n
+   * @param force forcefully stop all running tasks
    */
   @Override
   public void stop(boolean force) throws IOException {
@@ -132,7 +132,6 @@ public class RegionServerFlushTableProcedureManager extends RegionServerProcedur
    * @return Subprocedure to submit to the ProcedureMember.
    */
   public Subprocedure buildSubprocedure(String table, String family) {
-
     // don't run the subprocedure if the parent is stop(ping)
     if (rss.isStopping() || rss.isStopped()) {
       throw new IllegalStateException("Can't start flush region subprocedure on RS: "
@@ -166,8 +165,8 @@ public class RegionServerFlushTableProcedureManager extends RegionServerProcedur
 
   /**
    * Get the list of regions to flush for the table on this server It is possible that if a region
-   * moves somewhere between the calls we'll miss the region. n * @return the list of online
-   * regions. Empty list is returned if no regions. n
+   * moves somewhere between the calls we'll miss the region.
+   * @return the list of online regions. Empty list is returned if no regions.
    */
   private List<HRegion> getRegionsToFlush(String table) throws IOException {
     return (List<HRegion>) rss.getRegions(TableName.valueOf(table));
@@ -237,7 +236,7 @@ public class RegionServerFlushTableProcedureManager extends RegionServerProcedur
     /**
      * Wait for all of the currently outstanding tasks submitted via {@link #submitTask(Callable)}.
      * This *must* be called after all tasks are submitted via submitTask.
-     * @return <tt>true</tt> on success, <tt>false</tt> otherwise n
+     * @return <tt>true</tt> on success, <tt>false</tt> otherwise
      */
     boolean waitForOutstandingTasks() throws ForeignException, InterruptedException {
       LOG.debug("Waiting for local region flush to finish.");
@@ -281,7 +280,7 @@ public class RegionServerFlushTableProcedureManager extends RegionServerProcedur
 
     /**
      * This attempts to cancel out all pending and in progress tasks. Does not interrupt the running
-     * tasks itself. An ongoing HRegion.flush() should not be interrupted (see HBASE-13877). n
+     * tasks itself. An ongoing HRegion.flush() should not be interrupted (see HBASE-13877).
      */
     void cancelTasks() throws InterruptedException {
       Collection<Future<Void>> tasks = futures;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/ReplicationProtbufUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/ReplicationProtbufUtil.java
index b773bf198c1..36f2fdab0be 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/ReplicationProtbufUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/ReplicationProtbufUtil.java
@@ -136,9 +136,7 @@ public class ReplicationProtbufUtil {
     return new Pair<>(builder.build(), getCellScanner(allCells, size));
   }
 
-  /**
-   * n * @return <code>cells</code> packaged as a CellScanner
-   */
+  /** Returns <code>cells</code> packaged as a CellScanner */
   static CellScanner getCellScanner(final List<List<? extends Cell>> cells, final int size) {
     return new SizedCellScanner() {
       private final Iterator<List<? extends Cell>> entries = cells.iterator();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java
index 179c617462f..5cd3a92e5b6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AbstractMemStore.java
@@ -282,7 +282,7 @@ public abstract class AbstractMemStore implements MemStore {
   }
 
   /*
-   * nn * @return Return lowest of a or b or null if both a and b are null
+   * @return Return lowest of a or b or null if both a and b are null
    */
   protected Cell getLowest(final Cell a, final Cell b) {
     if (a == null) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AnnotationReadingPriorityFunction.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AnnotationReadingPriorityFunction.java
index cec2f483f8f..6e8c8cc3282 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AnnotationReadingPriorityFunction.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/AnnotationReadingPriorityFunction.java
@@ -90,7 +90,7 @@ public class AnnotationReadingPriorityFunction implements PriorityFunction {
 
   /**
    * Calls {@link #AnnotationReadingPriorityFunction(RSRpcServices, Class)} using the result of
-   * {@code rpcServices#getClass()} n * The RPC server implementation
+   * {@code rpcServices#getClass()} The RPC server implementation
    */
   public AnnotationReadingPriorityFunction(final RSRpcServices rpcServices) {
     this(rpcServices, rpcServices.getClass());
@@ -98,8 +98,8 @@ public class AnnotationReadingPriorityFunction implements PriorityFunction {
 
   /**
    * Constructs the priority function given the RPC server implementation and the annotations on the
-   * methods in the provided {@code clz}. n * The RPC server implementation n * The concrete RPC
-   * server implementation's class
+   * methods in the provided {@code clz}. The RPC server implementation The concrete RPC server
+   * implementation's class
    */
   public AnnotationReadingPriorityFunction(final RSRpcServices rpcServices,
     Class<? extends RSRpcServices> clz) {
@@ -158,8 +158,9 @@ public class AnnotationReadingPriorityFunction implements PriorityFunction {
   }
 
   /**
-   * See if the method has an annotation. n * @return Return the priority from the annotation. If
-   * there isn't an annotation, this returns something below zero.
+   * See if the method has an annotation.
+   * @return Return the priority from the annotation. If there isn't an annotation, this returns
+   *         something below zero.
    */
   protected int getAnnotatedPriority(RequestHeader header) {
     String methodName = header.getMethodName();
@@ -232,8 +233,8 @@ public class AnnotationReadingPriorityFunction implements PriorityFunction {
   }
 
   /**
-   * Based on the request content, returns the deadline of the request. nn * @return Deadline of
-   * this request. 0 now, otherwise msec of 'delay'
+   * Based on the request content, returns the deadline of the request.
+   * @return Deadline of this request. 0 now, otherwise msec of 'delay'
    */
   @Override
   public long getDeadline(RequestHeader header, Message param) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CellSink.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CellSink.java
index e8878a04b47..c7587a147a6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CellSink.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CellSink.java
@@ -31,7 +31,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface CellSink {
   /**
    * Append the given cell
-   * @param cell the cell to be added n
+   * @param cell the cell to be added
    */
   void append(Cell cell) throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ChunkCreator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ChunkCreator.java
index 1ea692ba5a5..054b5d0e503 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ChunkCreator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ChunkCreator.java
@@ -394,7 +394,7 @@ public class ChunkCreator {
 
     /**
      * Add the chunks to the pool, when the pool achieves the max size, it will skip the remaining
-     * chunks n
+     * chunks
      */
     private void putbackChunks(Chunk c) {
       int toAdd = this.maxCount - reclaimedChunks.size();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactingMemStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactingMemStore.java
index 9754bbee7bb..1a2cbc6bdab 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactingMemStore.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompactingMemStore.java
@@ -543,7 +543,7 @@ public class CompactingMemStore extends AbstractMemStore {
    * cells to currActive.cellSet,so for
    * {@link CompactingMemStore#flushInMemory(MutableSegment)},checkEmpty parameter is false. But if
    * {@link CompactingMemStore#snapshot} called this method,because there is no pending
-   * write,checkEmpty parameter could be true. nn
+   * write,checkEmpty parameter could be true.
    */
   protected void pushActiveToPipeline(MutableSegment currActive, boolean checkEmpty) {
     if (!checkEmpty || !currActive.isEmpty()) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FavoredNodesForRegion.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FavoredNodesForRegion.java
index 27fb3761de3..f6fc2250eff 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FavoredNodesForRegion.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FavoredNodesForRegion.java
@@ -30,14 +30,14 @@ import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.ServerName;
 @InterfaceAudience.Private
 public interface FavoredNodesForRegion {
   /**
-   * Used to update the favored nodes mapping when required. nn
+   * Used to update the favored nodes mapping when required.
    */
   void updateRegionFavoredNodesMapping(String encodedRegionName, List<ServerName> favoredNodes);
 
   /**
    * Get the favored nodes mapping for this region. Used when the HDFS create API is invoked to pass
-   * in favored nodes hints for new region files. n * @return array containing the favored nodes'
-   * InetSocketAddresses
+   * in favored nodes hints for new region files.
+   * @return array containing the favored nodes' InetSocketAddresses
    */
   InetSocketAddress[] getFavoredNodesForRegion(String encodedRegionName);
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FlushRequester.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FlushRequester.java
index b263a6d3f59..f8e68ce8629 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FlushRequester.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/FlushRequester.java
@@ -49,18 +49,18 @@ public interface FlushRequester {
   boolean requestDelayedFlush(HRegion region, long delay);
 
   /**
-   * Register a FlushRequestListener n
+   * Register a FlushRequestListener
    */
   void registerFlushRequestListener(final FlushRequestListener listener);
 
   /**
-   * Unregister the given FlushRequestListener n * @return true when passed listener is unregistered
-   * successfully.
+   * Unregister the given FlushRequestListener
+   * @return true when passed listener is unregistered successfully.
    */
   public boolean unregisterFlushRequestListener(final FlushRequestListener listener);
 
   /**
-   * Sets the global memstore limit to a new size. n
+   * Sets the global memstore limit to a new size.
    */
   public void setGlobalMemStoreLimit(long globalMemStoreSize);
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java
index 41737e6dd54..abefd9b40ae 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HMobStore.java
@@ -175,7 +175,7 @@ public class HMobStore extends HStore {
    * @param compression  The compression algorithm.
    * @param startKey     The start key.
    * @param isCompaction If the writer is used in compaction.
-   * @return The writer for the mob file. n
+   * @return The writer for the mob file.
    */
   public StoreFileWriter createWriterInTmp(Date date, long maxKeyCount,
     Compression.Algorithm compression, byte[] startKey, boolean isCompaction) throws IOException {
@@ -194,7 +194,7 @@ public class HMobStore extends HStore {
    * @param maxKeyCount The key count.
    * @param compression The compression algorithm.
    * @param startKey    The start key.
-   * @return The writer for the del file. n
+   * @return The writer for the del file.
    */
   public StoreFileWriter createDelFileWriterInTmp(Date date, long maxKeyCount,
     Compression.Algorithm compression, byte[] startKey) throws IOException {
@@ -215,7 +215,7 @@ public class HMobStore extends HStore {
    * @param compression  The compression algorithm.
    * @param startKey     The start key.
    * @param isCompaction If the writer is used in compaction.
-   * @return The writer for the mob file. n
+   * @return The writer for the mob file.
    */
   public StoreFileWriter createWriterInTmp(String date, Path basePath, long maxKeyCount,
     Compression.Algorithm compression, byte[] startKey, boolean isCompaction) throws IOException {
@@ -231,7 +231,7 @@ public class HMobStore extends HStore {
    * @param maxKeyCount  The key count.
    * @param compression  The compression algorithm.
    * @param isCompaction If the writer is used in compaction.
-   * @return The writer for the mob file. n
+   * @return The writer for the mob file.
    */
   public StoreFileWriter createWriterInTmp(MobFileName mobFileName, Path basePath, long maxKeyCount,
     Compression.Algorithm compression, boolean isCompaction) throws IOException {
@@ -245,7 +245,7 @@ public class HMobStore extends HStore {
   /**
    * Commits the mob file.
    * @param sourceFile The source file.
-   * @param targetPath The directory path where the source file is renamed to. n
+   * @param targetPath The directory path where the source file is renamed to.
    */
   public void commitFile(final Path sourceFile, Path targetPath) throws IOException {
     if (sourceFile == null) {
@@ -289,7 +289,7 @@ public class HMobStore extends HStore {
    * DefaultMobStoreCompactor where we can read empty value for the missing cell.
    * @param reference   The cell found in the HBase, its value is a path to a mob file.
    * @param cacheBlocks Whether the scanner should cache blocks.
-   * @return The cell found in the mob file. n
+   * @return The cell found in the mob file.
    */
   public MobCell resolve(Cell reference, boolean cacheBlocks) throws IOException {
     return resolve(reference, cacheBlocks, -1, true);
@@ -303,7 +303,7 @@ public class HMobStore extends HStore {
    * @param readPt                      the read point.
    * @param readEmptyValueOnMobCellMiss Whether return null value when the mob file is missing or
    *                                    corrupt.
-   * @return The cell found in the mob file. n
+   * @return The cell found in the mob file.
    */
   public MobCell resolve(Cell reference, boolean cacheBlocks, long readPt,
     boolean readEmptyValueOnMobCellMiss) throws IOException {
@@ -363,7 +363,7 @@ public class HMobStore extends HStore {
    * @param readPt                      the read point.
    * @param readEmptyValueOnMobCellMiss Whether return null value when the mob file is missing or
    *                                    corrupt.
-   * @return The found cell. Null if there's no such a cell. n
+   * @return The found cell. Null if there's no such a cell.
    */
   private MobCell readCell(List<Path> locations, String fileName, Cell search,
     boolean cacheMobBlocks, long readPt, boolean readEmptyValueOnMobCellMiss) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
index ebf9569b7a1..2250b8cee1a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
@@ -1085,7 +1085,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   }
 
   /**
-   * Open all Stores. nn * @return Highest sequenceId found out in a Store. n
+   * Open all Stores.
+   * @return Highest sequenceId found out in a Store.
    */
   private long initializeStores(CancelableProgressable reporter, MonitoredTask status)
     throws IOException {
@@ -1260,7 +1261,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * @param tableDescriptor TableDescriptor of the table
    * @param regionInfo      encoded name of the region
    * @param tablePath       the table directory
-   * @return The HDFS blocks distribution for the given region. n
+   * @return The HDFS blocks distribution for the given region.
    */
   public static HDFSBlocksDistribution computeHDFSBlocksDistribution(Configuration conf,
     TableDescriptor tableDescriptor, RegionInfo regionInfo, Path tablePath) throws IOException {
@@ -2104,7 +2105,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   // upkeep.
   //////////////////////////////////////////////////////////////////////////////
   /**
-   * Do preparation for pending compaction. n
+   * Do preparation for pending compaction.
    */
   protected void doRegionCompactionPrep() throws IOException {
   }
@@ -2118,7 +2119,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * activities. The regionserver does not normally compact and split in parallel. However by
    * calling this method you may introduce unexpected and unhandled concurrency. Don't do this
    * unless you know what you are doing.
-   * @param majorCompaction True to force a major compaction regardless of thresholds n
+   * @param majorCompaction True to force a major compaction regardless of thresholds
    */
   public void compact(boolean majorCompaction) throws IOException {
     if (majorCompaction) {
@@ -2173,8 +2174,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * that no locking is necessary at this level because compaction only conflicts with a region
    * split, and that cannot happen because the region server does them sequentially and not in
    * parallel.
-   * @param compaction Compaction details, obtained by requestCompaction() n * @return whether the
-   *                   compaction completed
+   * @param compaction Compaction details, obtained by requestCompaction()
+   * @return whether the compaction completed
    */
   public boolean compact(CompactionContext compaction, HStore store,
     ThroughputController throughputController) throws IOException {
@@ -2786,8 +2787,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * Writes a marker to WAL indicating a flush is requested but cannot be complete due to various
-   * reasons. Ignores exceptions from WAL. Returns whether the write succeeded. n * @return whether
-   * WAL write was successful
+   * reasons. Ignores exceptions from WAL. Returns whether the write succeeded.
+   * @return whether WAL write was successful
    */
   private boolean writeFlushRequestMarkerToWAL(WAL wal, boolean writeFlushWalMarker) {
     if (writeFlushWalMarker && wal != null && !writestate.readOnly) {
@@ -2958,7 +2959,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * Method to safely get the next sequence number.
-   * @return Next sequence number unassociated with any actual edit. n
+   * @return Next sequence number unassociated with any actual edit.
    */
   protected long getNextSequenceId(final WAL wal) throws IOException {
     WriteEntry we = mvcc.begin();
@@ -3021,7 +3022,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * Prepare a delete for a row mutation processor
-   * @param delete The passed delete is modified by this method. WARNING! n
+   * @param delete The passed delete is modified by this method. WARNING!
    */
   public void prepareDelete(Delete delete) throws IOException {
     // Check to see if this is a deleteRow insert
@@ -3060,7 +3061,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * This is used only by unit tests. Not required to be a public API.
-   * @param familyMap map of family to edits for the given family. n
+   * @param familyMap map of family to edits for the given family.
    */
   void delete(NavigableMap<byte[], List<Cell>> familyMap, Durability durability)
     throws IOException {
@@ -3073,7 +3074,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   /**
    * Set up correct timestamps in the KVs in Delete object.
    * <p>
-   * Caller should have the row and region locks. nnnn
+   * Caller should have the row and region locks.
    */
   public void prepareDeleteTimestamps(Mutation mutation, Map<byte[], List<Cell>> familyMap,
     byte[] byteNow) throws IOException {
@@ -4895,7 +4896,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * Replace any cell timestamps set to {@link org.apache.hadoop.hbase.HConstants#LATEST_TIMESTAMP}
-   * provided current timestamp. nn
+   * provided current timestamp.
    */
   private static void updateCellTimestamps(final Iterable<List<Cell>> cellItr, final byte[] now)
     throws IOException {
@@ -4991,7 +4992,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   /**
    * Add updates first to the wal and then add values to memstore. Warning: Assumption is caller has
    * lock on passed in row.
-   * @param edits Cell updates by column n
+   * @param edits Cell updates by column
    */
   void put(final byte[] row, byte[] family, List<Cell> edits) throws IOException {
     NavigableMap<byte[], List<Cell>> familyMap;
@@ -5034,7 +5035,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   }
 
   /**
-   * Check the collection of families for validity. nn
+   * Check the collection of families for validity.
    */
   public void checkFamilies(Collection<byte[]> families) throws NoSuchColumnFamilyException {
     for (byte[] family : families) {
@@ -5043,7 +5044,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   }
 
   /**
-   * Check the collection of families for valid timestamps n * @param now current timestamp n
+   * Check the collection of families for valid timestamps
+   * @param now current timestamp
    */
   public void checkTimestamps(final Map<byte[], List<Cell>> familyMap, long now)
     throws FailedSanityCheckException {
@@ -5069,7 +5071,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   }
 
   /*
-   * n * @return True if size is over the flush threshold
+   * @return True if size is over the flush threshold
    */
   private boolean isFlushSize(MemStoreSize size) {
     return size.getHeapSize() + size.getOffHeapSize() > getMemStoreFlushSize();
@@ -5808,7 +5810,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * Replays the given flush descriptor by opening the flush files in stores and dropping the
-   * memstore snapshots if requested. nnnn
+   * memstore snapshots if requested.
    */
   private void replayFlushInStores(FlushDescriptor flush, PrepareFlushResult prepareFlushResult,
     boolean dropMemstoreSnapshot) throws IOException {
@@ -5901,7 +5903,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
 
   /**
    * Drops the memstore contents after replaying a flush descriptor or region open event replay if
-   * the memstore edits have seqNums smaller than the given seq id n
+   * the memstore edits have seqNums smaller than the given seq id
    */
   private MemStoreSize dropMemStoreContentsForSeqId(long seqId, HStore store) throws IOException {
     MemStoreSizing totalFreedSize = new NonThreadSafeMemStoreSizing();
@@ -6343,7 +6345,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * make sure have been through lease recovery before get file status, so the file length can be
    * trusted.
    * @param p File to check.
-   * @return True if file was zero-length (and if so, we'll delete it in here). n
+   * @return True if file was zero-length (and if so, we'll delete it in here).
    */
   private static boolean isZeroLengthThenDelete(final FileSystem fs, final FileStatus stat,
     final Path p) throws IOException {
@@ -6428,7 +6430,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   /**
    * Get an exclusive ( write lock ) lock on a given row.
    * @param row Which row to lock.
-   * @return A locked RowLock. The lock is exclusive and already aqquired. n
+   * @return A locked RowLock. The lock is exclusive and already aqquired.
    */
   public RowLock getRowLock(byte[] row) throws IOException {
     return getRowLock(row, false);
@@ -6656,8 +6658,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * column families atomically.
    * @param familyPaths      List of Pair&lt;byte[] column family, String hfilePath&gt;
    * @param bulkLoadListener Internal hooks enabling massaging/preparation of a file about to be
-   *                         bulk loaded n * @return Map from family to List of store file paths if
-   *                         successful, null if failed recoverably
+   *                         bulk loaded
+   * @return Map from family to List of store file paths if successful, null if failed recoverably
    * @throws IOException if failed unrecoverably.
    */
   public Map<byte[], List<Path>> bulkLoadHFiles(Collection<Pair<byte[], String>> familyPaths,
@@ -6674,21 +6676,21 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
      * Called before an HFile is actually loaded
      * @param family  family being loaded to
      * @param srcPath path of HFile
-     * @return final path to be used for actual loading n
+     * @return final path to be used for actual loading
      */
     String prepareBulkLoad(byte[] family, String srcPath, boolean copyFile) throws IOException;
 
     /**
      * Called after a successful HFile load
      * @param family  family being loaded to
-     * @param srcPath path of HFile n
+     * @param srcPath path of HFile
      */
     void doneBulkLoad(byte[] family, String srcPath) throws IOException;
 
     /**
      * Called after a failed HFile load
      * @param family  family being loaded to
-     * @param srcPath path of HFile n
+     * @param srcPath path of HFile
      */
     void failedBulkLoad(byte[] family, String srcPath) throws IOException;
   }
@@ -6696,11 +6698,11 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
   /**
    * Attempts to atomically load a group of hfiles. This is critical for loading rows with multiple
    * column families atomically.
-   * @param familyPaths List of Pair&lt;byte[] column family, String hfilePath&gt; n * @param
-   *                    bulkLoadListener Internal hooks enabling massaging/preparation of a file
-   *                    about to be bulk loaded
-   * @param copyFile    always copy hfiles if true
-   * @param clusterIds  ids from clusters that had already handled the given bulkload event.
+   * @param familyPaths      List of Pair&lt;byte[] column family, String hfilePath&gt;
+   * @param bulkLoadListener Internal hooks enabling massaging/preparation of a file about to be
+   *                         bulk loaded
+   * @param copyFile         always copy hfiles if true
+   * @param clusterIds       ids from clusters that had already handled the given bulkload event.
    * @return Map from family to List of store file paths if successful, null if failed recoverably
    * @throws IOException if failed unrecoverably.
    */
@@ -7174,7 +7176,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
      * Fetches records with currentRow into results list, until next row, batchLimit (if not -1) is
      * reached, or remainingResultSize (if not -1) is reaced
      * @param heap KeyValueHeap to fetch data from.It must be positioned on correct row before call.
-     *             nn * @return state of last call to {@link KeyValueHeap#next()}
+     * @return state of last call to {@link KeyValueHeap#next()}
      */
     private boolean populateResult(List<Cell> results, KeyValueHeap heap,
       ScannerContext scannerContext, Cell currentRowCell) throws IOException {
@@ -7216,8 +7218,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
     /**
      * Based on the nextKv in the heap, and the current row, decide whether or not there are more
      * cells to be read in the heap. If the row of the nextKv in the heap matches the current row
-     * then there are more cells to be read in the row. nn * @return true When there are more cells
-     * in the row to be read
+     * then there are more cells to be read in the row.
+     * @return true When there are more cells in the row to be read
      */
     private boolean moreCellsInRow(final Cell nextKv, Cell currentRowCell) {
       return nextKv != null && CellUtil.matchingRows(nextKv, currentRowCell);
@@ -7483,9 +7485,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
       scannerContext.getMetrics().countOfRowsScanned.incrementAndGet();
     }
 
-    /**
-     * n * @return true when the joined heap may have data for the current row n
-     */
+    /** Returns true when the joined heap may have data for the current row */
     private boolean joinedHeapMayHaveData(Cell currentRowCell) throws IOException {
       Cell nextJoinedKv = joinedHeap.peek();
       boolean matchCurrentRow =
@@ -7717,7 +7717,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * @param wal  WAL for region to use. This method will call WAL#setSequenceNumber(long) passing
    *             the result of the call to HRegion#getMinSequenceId() to ensure the wal id is
    *             properly kept up. HRegionStore does this every time it opens a new region.
-   * @return new HRegion n
+   * @return new HRegion
    */
   public static HRegion openHRegion(final RegionInfo info, final TableDescriptor htd, final WAL wal,
     final Configuration conf) throws IOException {
@@ -7735,7 +7735,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * @param conf       The Configuration object to use.
    * @param rsServices An interface we can request flushes against.
    * @param reporter   An interface we can report progress against.
-   * @return new HRegion n
+   * @return new HRegion
    */
   public static HRegion openHRegion(final RegionInfo info, final TableDescriptor htd, final WAL wal,
     final Configuration conf, final RegionServerServices rsServices,
@@ -7752,7 +7752,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    *                the result of the call to HRegion#getMinSequenceId() to ensure the wal id is
    *                properly kept up. HRegionStore does this every time it opens a new region.
    * @param conf    The Configuration object to use.
-   * @return new HRegion n
+   * @return new HRegion
    */
   public static HRegion openHRegion(Path rootDir, final RegionInfo info, final TableDescriptor htd,
     final WAL wal, final Configuration conf) throws IOException {
@@ -7771,7 +7771,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * @param conf       The Configuration object to use.
    * @param rsServices An interface we can request flushes against.
    * @param reporter   An interface we can report progress against.
-   * @return new HRegion n
+   * @return new HRegion
    */
   public static HRegion openHRegion(final Path rootDir, final RegionInfo info,
     final TableDescriptor htd, final WAL wal, final Configuration conf,
@@ -8108,7 +8108,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
    * @param nonceGroup Optional nonce group of the operation (client Id)
    * @param nonce      Optional nonce of the operation (unique random id to ensure "more
    *                   idempotence") If multiple rows are locked care should be taken that
-   *                   <code>rowsToLock</code> is sorted in order to avoid deadlocks. n
+   *                   <code>rowsToLock</code> is sorted in order to avoid deadlocks.
    */
   @Override
   public void mutateRowsWithLocks(Collection<Mutation> mutations, Collection<byte[]> rowsToLock,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java
index bb084e6daf3..4555c2dc110 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionFileSystem.java
@@ -345,7 +345,7 @@ public class HRegionFileSystem {
   /**
    * Returns true if the specified family has reference files
    * @param familyName Column Family Name
-   * @return true if family contains reference files n
+   * @return true if family contains reference files
    */
   public boolean hasReferences(final String familyName) throws IOException {
     Path storeDir = getStoreDir(familyName);
@@ -367,7 +367,7 @@ public class HRegionFileSystem {
   /**
    * Check whether region has Reference file
    * @param htd table desciptor of the region
-   * @return true if region has reference file n
+   * @return true if region has reference file
    */
   public boolean hasReferences(final TableDescriptor htd) throws IOException {
     for (ColumnFamilyDescriptor family : htd.getColumnFamilies()) {
@@ -450,7 +450,7 @@ public class HRegionFileSystem {
    * Move the file from a build/temp location to the main family store directory.
    * @param familyName Family that will gain the file
    * @param buildPath  {@link Path} to the file to commit.
-   * @return The new {@link Path} of the committed file n
+   * @return The new {@link Path} of the committed file
    */
   public Path commitStoreFile(final String familyName, final Path buildPath) throws IOException {
     Path dstPath = preCommitStoreFile(familyName, buildPath, -1, false);
@@ -465,7 +465,7 @@ public class HRegionFileSystem {
    * @param seqNum          Sequence Number to append to the file name (less then 0 if no sequence
    *                        number)
    * @param generateNewName False if you want to keep the buildPath name
-   * @return The new {@link Path} of the to be committed file n
+   * @return The new {@link Path} of the to be committed file
    */
   private Path preCommitStoreFile(final String familyName, final Path buildPath, final long seqNum,
     final boolean generateNewName) throws IOException {
@@ -491,7 +491,7 @@ public class HRegionFileSystem {
    * Moves file from staging dir to region dir
    * @param buildPath {@link Path} to the file to commit.
    * @param dstPath {@link Path} to the file under region dir
-   * @return The {@link Path} of the committed file n
+   * @return The {@link Path} of the committed file
    */
   Path commitStoreFile(final Path buildPath, Path dstPath) throws IOException {
     // buildPath exists, therefore not doing an exists() check.
@@ -531,7 +531,7 @@ public class HRegionFileSystem {
    * @param familyName Family that will gain the file
    * @param srcPath    {@link Path} to the file to import
    * @param seqNum     Bulk Load sequence number
-   * @return The destination {@link Path} of the bulk loaded file n
+   * @return The destination {@link Path} of the bulk loaded file
    */
   Pair<Path, Path> bulkLoadStoreFile(final String familyName, Path srcPath, long seqNum)
     throws IOException {
@@ -577,7 +577,7 @@ public class HRegionFileSystem {
 
   /**
    * Clean up any split detritus that may have been left around from previous split attempts. Call
-   * this method on initial region deploy. n
+   * this method on initial region deploy.
    */
   void cleanupAnySplitDetritus() throws IOException {
     Path splitdir = this.getSplitsDir();
@@ -604,7 +604,7 @@ public class HRegionFileSystem {
 
   /**
    * Remove daughter region
-   * @param regionInfo daughter {@link RegionInfo} n
+   * @param regionInfo daughter {@link RegionInfo}
    */
   void cleanupDaughterRegion(final RegionInfo regionInfo) throws IOException {
     Path regionDir = new Path(this.tableDir, regionInfo.getEncodedName());
@@ -616,7 +616,7 @@ public class HRegionFileSystem {
   /**
    * Commit a daughter region, moving it from the split temporary directory to the proper location
    * in the filesystem.
-   * @param regionInfo daughter {@link org.apache.hadoop.hbase.client.RegionInfo} n
+   * @param regionInfo daughter {@link org.apache.hadoop.hbase.client.RegionInfo}
    */
   public Path commitDaughterRegion(final RegionInfo regionInfo) throws IOException {
     Path regionDir = new Path(this.tableDir, regionInfo.getEncodedName());
@@ -673,7 +673,7 @@ public class HRegionFileSystem {
    * @param splitPolicy A split policy instance; be careful! May not be full populated; e.g. if this
    *                    method is invoked on the Master side, then the RegionSplitPolicy will NOT
    *                    have a reference to a Region.
-   * @return Path to created reference. n
+   * @return Path to created reference.
    */
   public Path splitStoreFile(RegionInfo hri, String familyName, HStoreFile f, byte[] splitRow,
     boolean top, RegionSplitPolicy splitPolicy) throws IOException {
@@ -783,7 +783,7 @@ public class HRegionFileSystem {
 
   /**
    * Remove merged region
-   * @param mergedRegion {@link RegionInfo} n
+   * @param mergedRegion {@link RegionInfo}
    */
   public void cleanupMergedRegion(final RegionInfo mergedRegion) throws IOException {
     Path regionDir = new Path(this.tableDir, mergedRegion.getEncodedName());
@@ -826,7 +826,8 @@ public class HRegionFileSystem {
    * out of regionserver.
    * @param mergedRegion {@link RegionInfo} of the merged region
    * @param familyName   Column Family Name
-   * @param f            File to create reference. n * @return Path to created reference. n
+   * @param f            File to create reference.
+   * @return Path to created reference.
    */
   public Path mergeStoreFile(RegionInfo mergedRegion, String familyName, HStoreFile f,
     Path mergedDir) throws IOException {
@@ -847,7 +848,7 @@ public class HRegionFileSystem {
   /**
    * Commit a merged region, moving it from the merges temporary directory to the proper location in
    * the filesystem.
-   * @param mergedRegionInfo merged region {@link RegionInfo} n
+   * @param mergedRegionInfo merged region {@link RegionInfo}
    */
   public void commitMergedRegion(final RegionInfo mergedRegionInfo) throws IOException {
     Path regionDir = new Path(this.tableDir, mergedRegionInfo.getEncodedName());
@@ -878,9 +879,7 @@ public class HRegionFileSystem {
     CommonFSUtils.logFileSystemState(fs, this.getRegionDir(), LOG);
   }
 
-  /**
-   * n * @return Content of the file we write out to the filesystem under a region n
-   */
+  /** Returns Content of the file we write out to the filesystem under a region */
   private static byte[] getRegionInfoFileContent(final RegionInfo hri) throws IOException {
     return RegionInfo.toDelimitedByteArray(hri);
   }
@@ -1116,9 +1115,9 @@ public class HRegionFileSystem {
   }
 
   /**
-   * Creates a directory. Assumes the user has already checked for this directory existence. n
-   * * @return the result of fs.mkdirs(). In case underlying fs throws an IOException, it checks
-   * whether the directory exists or not, and returns true if it exists. n
+   * Creates a directory. Assumes the user has already checked for this directory existence.
+   * @return the result of fs.mkdirs(). In case underlying fs throws an IOException, it checks
+   *         whether the directory exists or not, and returns true if it exists.
    */
   boolean createDir(Path dir) throws IOException {
     int i = 0;
@@ -1140,8 +1139,8 @@ public class HRegionFileSystem {
   }
 
   /**
-   * Renames a directory. Assumes the user has already checked for this directory existence. nn
-   * * @return true if rename is successful. n
+   * Renames a directory. Assumes the user has already checked for this directory existence.
+   * @return true if rename is successful.
    */
   boolean rename(Path srcpath, Path dstPath) throws IOException {
     IOException lastIOE = null;
@@ -1165,8 +1164,8 @@ public class HRegionFileSystem {
   }
 
   /**
-   * Deletes a directory. Assumes the user has already checked for this directory existence. n
-   * * @return true if the directory is deleted. n
+   * Deletes a directory. Assumes the user has already checked for this directory existence.
+   * @return true if the directory is deleted.
    */
   boolean deleteDir(Path dir) throws IOException {
     IOException lastIOE = null;
@@ -1198,9 +1197,9 @@ public class HRegionFileSystem {
 
   /**
    * Creates a directory for a filesystem and configuration object. Assumes the user has already
-   * checked for this directory existence. nnn * @return the result of fs.mkdirs(). In case
-   * underlying fs throws an IOException, it checks whether the directory exists or not, and returns
-   * true if it exists. n
+   * checked for this directory existence.
+   * @return the result of fs.mkdirs(). In case underlying fs throws an IOException, it checks
+   *         whether the directory exists or not, and returns true if it exists.
    */
   private static boolean createDirOnFileSystem(FileSystem fs, Configuration conf, Path dir)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
index 12df23fc4de..51bd5911e1f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
@@ -864,7 +864,7 @@ public class HRegionServer extends Thread
   }
 
   /**
-   * Run test on configured codecs to make sure supporting libs are in place. nn
+   * Run test on configured codecs to make sure supporting libs are in place.
    */
   private static void checkCodecs(final Configuration c) throws IOException {
     // check to see if the codec list is available:
@@ -883,7 +883,7 @@ public class HRegionServer extends Thread
   }
 
   /**
-   * Setup our cluster connection if not already initialized. n
+   * Setup our cluster connection if not already initialized.
    */
   protected synchronized void setupClusterConnection() throws IOException {
     if (clusterConnection == null) {
@@ -1540,7 +1540,7 @@ public class HRegionServer extends Thread
   }
 
   /**
-   * get NamedQueue Provider to add different logs to ringbuffer n
+   * get NamedQueue Provider to add different logs to ringbuffer
    */
   public NamedQueueRecorder getNamedQueueRecorder() {
     return this.namedQueueRecorder;
@@ -2526,8 +2526,8 @@ public class HRegionServer extends Thread
   /**
    * Cause the server to exit without closing the regions it is serving, the log it is using and
    * without notifying the master. Used unit testing and on catastrophic events such as HDFS is
-   * yanked out from under hbase or we OOME. n * the reason we are aborting n * the exception that
-   * caused the abort, or null
+   * yanked out from under hbase or we OOME. the reason we are aborting the exception that caused
+   * the abort, or null
    */
   @Override
   public void abort(String reason, Throwable cause) {
@@ -2788,7 +2788,7 @@ public class HRegionServer extends Thread
   /*
    * Let the master know we're here Run initialization using parameters passed us by the master.
    * @return A Map of key/value configurations we got from the Master else null if we failed to
-   * register. n
+   * register.
    */
   private RegionServerStartupResponse reportForDuty() throws IOException {
     if (this.masterless) return RegionServerStartupResponse.getDefaultInstance();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStoreFile.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStoreFile.java
index 551bd684b67..29203b26e77 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStoreFile.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStoreFile.java
@@ -198,7 +198,7 @@ public class HStoreFile implements StoreFile {
    *                       actually present in the HFile, because column family configuration might
    *                       change. If this is {@link BloomType#NONE}, the existing Bloom filter is
    *                       ignored.
-   * @param primaryReplica true if this is a store file for primary replica, otherwise false. n
+   * @param primaryReplica true if this is a store file for primary replica, otherwise false.
    */
   public HStoreFile(FileSystem fs, Path p, Configuration conf, CacheConfig cacheConf,
     BloomType cfBloomType, boolean primaryReplica) throws IOException {
@@ -295,7 +295,8 @@ public class HStoreFile implements StoreFile {
   }
 
   /**
-   * Only used by the Striped Compaction Policy n * @return value associated with the metadata key
+   * Only used by the Striped Compaction Policy
+   * @return value associated with the metadata key
    */
   public byte[] getMetadataValue(byte[] key) {
     return metadataMap.get(key);
@@ -532,7 +533,7 @@ public class HStoreFile implements StoreFile {
   }
 
   /**
-   * @param evictOnClose whether to evict blocks belonging to this file n
+   * @param evictOnClose whether to evict blocks belonging to this file
    */
   public synchronized void closeStoreFile(boolean evictOnClose) throws IOException {
     if (this.initialReader != null) {
@@ -542,7 +543,7 @@ public class HStoreFile implements StoreFile {
   }
 
   /**
-   * Delete this file n
+   * Delete this file
    */
   public void deleteStoreFile() throws IOException {
     boolean evictOnClose = cacheConf != null ? cacheConf.shouldEvictOnClose() : true;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryTuner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryTuner.java
index cd6281729c7..563adecd1ae 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryTuner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HeapMemoryTuner.java
@@ -32,8 +32,8 @@ import org.apache.yetus.audience.InterfaceStability;
 public interface HeapMemoryTuner extends Configurable {
 
   /**
-   * Perform the heap memory tuning operation. n * @return <code>TunerResult</code> including the
-   * heap percentage for memstore and block cache
+   * Perform the heap memory tuning operation.
+   * @return <code>TunerResult</code> including the heap percentage for memstore and block cache
    */
   TunerResult tune(TunerContext context);
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScan.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScan.java
index 045407c7cf1..795abd107e1 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScan.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScan.java
@@ -46,7 +46,7 @@ public class InternalScan extends Scan {
   }
 
   /**
-   * @param scan - original scan object n
+   * @param scan - original scan object
    */
   public InternalScan(Scan scan) throws IOException {
     super(scan);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScanner.java
index c6ff029c5e6..47ff5c38d39 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/InternalScanner.java
@@ -51,14 +51,14 @@ public interface InternalScanner extends Closeable {
 
   /**
    * Grab the next row's worth of values.
-   * @param result return output array n * @return true if more rows exist after this one, false if
-   *               scanner is done
+   * @param result return output array
+   * @return true if more rows exist after this one, false if scanner is done
    * @throws IOException e
    */
   boolean next(List<Cell> result, ScannerContext scannerContext) throws IOException;
 
   /**
-   * Closes the scanner and releases any resources it has allocated n
+   * Closes the scanner and releases any resources it has allocated
    */
   @Override
   void close() throws IOException;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
index 7041e6c7914..1fe80bc58b0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueHeap.java
@@ -65,7 +65,7 @@ public class KeyValueHeap extends NonReversedNonLazyKeyValueScanner
   protected KVScannerComparator comparator;
 
   /**
-   * Constructor. This KeyValueHeap will handle closing of passed in KeyValueScanners. nn
+   * Constructor. This KeyValueHeap will handle closing of passed in KeyValueScanners.
    */
   public KeyValueHeap(List<? extends KeyValueScanner> scanners, CellComparator comparator)
     throws IOException {
@@ -73,7 +73,7 @@ public class KeyValueHeap extends NonReversedNonLazyKeyValueScanner
   }
 
   /**
-   * Constructor. nnn
+   * Constructor.
    */
   KeyValueHeap(List<? extends KeyValueScanner> scanners, KVScannerComparator comparator)
     throws IOException {
@@ -170,7 +170,7 @@ public class KeyValueHeap extends NonReversedNonLazyKeyValueScanner
     protected CellComparator kvComparator;
 
     /**
-     * Constructor n
+     * Constructor
      */
     public KVScannerComparator(CellComparator kvComparator) {
       this.kvComparator = kvComparator;
@@ -190,15 +190,15 @@ public class KeyValueHeap extends NonReversedNonLazyKeyValueScanner
     }
 
     /**
-     * Compares two KeyValue nn * @return less than 0 if left is smaller, 0 if equal etc..
+     * Compares two KeyValue
+     * @return less than 0 if left is smaller, 0 if equal etc..
      */
     public int compare(Cell left, Cell right) {
       return this.kvComparator.compare(left, right);
     }
 
     /**
-     * n
-     */
+     *     */
     public CellComparator getComparator() {
       return this.kvComparator;
     }
@@ -232,7 +232,7 @@ public class KeyValueHeap extends NonReversedNonLazyKeyValueScanner
    * This function (and {@link #reseek(Cell)}) does not do multi-column Bloom filter and lazy-seek
    * optimizations. To enable those, call {@link #requestSeek(Cell, boolean, boolean)}.
    * @param seekKey KeyValue to seek at or after
-   * @return true if KeyValues exist at or after specified key, false if not n
+   * @return true if KeyValues exist at or after specified key, false if not
    */
   @Override
   public boolean seek(Cell seekKey) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueScanner.java
index ac2cb7aef12..d90cf78dda5 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueScanner.java
@@ -152,7 +152,7 @@ public interface KeyValueScanner extends Shipper, Closeable {
 
   /**
    * Seek the scanner at the first KeyValue of last row
-   * @return true if scanner has values left, false if the underlying data is empty n
+   * @return true if scanner has values left, false if the underlying data is empty
    */
   public boolean seekToLastRow() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStore.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStore.java
index 164615c089e..947944baf91 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStore.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStore.java
@@ -41,7 +41,8 @@ public interface MemStore {
   MemStoreSnapshot snapshot();
 
   /**
-   * Clears the current snapshot of the Memstore. nn * @see #snapshot()
+   * Clears the current snapshot of the Memstore.
+   * @see #snapshot()
    */
   void clearSnapshot(long id) throws UnexpectedStateException;
 
@@ -59,14 +60,16 @@ public interface MemStore {
   MemStoreSize getSnapshotSize();
 
   /**
-   * Write an update n * @param memstoreSizing The delta in memstore size will be passed back via
-   * this. This will include both data size and heap overhead delta.
+   * Write an update
+   * @param memstoreSizing The delta in memstore size will be passed back via this. This will
+   *                       include both data size and heap overhead delta.
    */
   void add(final Cell cell, MemStoreSizing memstoreSizing);
 
   /**
-   * Write the updates n * @param memstoreSizing The delta in memstore size will be passed back via
-   * this. This will include both data size and heap overhead delta.
+   * Write the updates
+   * @param memstoreSizing The delta in memstore size will be passed back via this. This will
+   *                       include both data size and heap overhead delta.
    */
   void add(Iterable<Cell> cells, MemStoreSizing memstoreSizing);
 
@@ -83,8 +86,8 @@ public interface MemStore {
    * visible. May want to change this so it is atomic across all KeyValues.
    * <p>
    * This is called under row lock, so Get operations will still see updates atomically. Scans will
-   * only see each KeyValue update as atomic. n * @param readpoint readpoint below which we can
-   * safely remove duplicate Cells.
+   * only see each KeyValue update as atomic.
+   * @param readpoint      readpoint below which we can safely remove duplicate Cells.
    * @param memstoreSizing The delta in memstore size will be passed back via this. This will
    *                       include both data size and heap overhead delta.
    */
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
index 8efed0f4907..cd8de093c2d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MemStoreFlusher.java
@@ -108,8 +108,7 @@ class MemStoreFlusher implements FlushRequester {
   };
 
   /**
-   * nn
-   */
+   *   */
   public MemStoreFlusher(final Configuration conf, final HRegionServer server) {
     super();
     this.conf = conf;
@@ -518,8 +517,9 @@ class MemStoreFlusher implements FlushRequester {
 
   /**
    * A flushRegion that checks store file count. If too many, puts the flush on delay queue to retry
-   * later. n * @return true if the region was successfully flushed, false otherwise. If false,
-   * there will be accompanying log messages explaining why the region was not flushed.
+   * later.
+   * @return true if the region was successfully flushed, false otherwise. If false, there will be
+   *         accompanying log messages explaining why the region was not flushed.
    */
   private boolean flushRegion(final FlushRegionEntry fqe) {
     HRegion region = fqe.region;
@@ -768,7 +768,7 @@ class MemStoreFlusher implements FlushRequester {
   }
 
   /**
-   * Register a MemstoreFlushListener n
+   * Register a MemstoreFlushListener
    */
   @Override
   public void registerFlushRequestListener(final FlushRequestListener listener) {
@@ -776,8 +776,8 @@ class MemStoreFlusher implements FlushRequester {
   }
 
   /**
-   * Unregister the listener from MemstoreFlushListeners n * @return true when passed listener is
-   * unregistered successfully.
+   * Unregister the listener from MemstoreFlushListeners
+   * @return true when passed listener is unregistered successfully.
    */
   @Override
   public boolean unregisterFlushRequestListener(final FlushRequestListener listener) {
@@ -785,7 +785,7 @@ class MemStoreFlusher implements FlushRequester {
   }
 
   /**
-   * Sets the global memstore limit to a new size. n
+   * Sets the global memstore limit to a new size.
    */
   @Override
   public void setGlobalMemStoreLimit(long globalMemStoreSize) {
@@ -821,9 +821,7 @@ class MemStoreFlusher implements FlushRequester {
       this.tracker = tracker;
     }
 
-    /**
-     * n * @return True if we have been delayed > <code>maximumWait</code> milliseconds.
-     */
+    /** Returns True if we have been delayed > <code>maximumWait</code> milliseconds. */
     public boolean isMaximumWait(final long maximumWait) {
       return (EnvironmentEdgeManager.currentTime() - this.createTime) > maximumWait;
     }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MiniBatchOperationInProgress.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MiniBatchOperationInProgress.java
index 10579dd31f1..bd071141729 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MiniBatchOperationInProgress.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MiniBatchOperationInProgress.java
@@ -66,9 +66,7 @@ public class MiniBatchOperationInProgress<T> {
     return this.lastIndexExclusive - this.firstIndex;
   }
 
-  /**
-   * n * @return The operation(Mutation) at the specified position.
-   */
+  /** Returns The operation(Mutation) at the specified position. */
   public T getOperation(int index) {
     return operations[getAbsoluteIndex(index)];
   }
@@ -76,29 +74,25 @@ public class MiniBatchOperationInProgress<T> {
   /**
    * Sets the status code for the operation(Mutation) at the specified position. By setting this
    * status, {@link org.apache.hadoop.hbase.coprocessor.RegionObserver} can make HRegion to skip
-   * Mutations. nn
+   * Mutations.
    */
   public void setOperationStatus(int index, OperationStatus opStatus) {
     this.retCodeDetails[getAbsoluteIndex(index)] = opStatus;
   }
 
-  /**
-   * n * @return Gets the status code for the operation(Mutation) at the specified position.
-   */
+  /** Returns Gets the status code for the operation(Mutation) at the specified position. */
   public OperationStatus getOperationStatus(int index) {
     return this.retCodeDetails[getAbsoluteIndex(index)];
   }
 
   /**
-   * Sets the walEdit for the operation(Mutation) at the specified position. nn
+   * Sets the walEdit for the operation(Mutation) at the specified position.
    */
   public void setWalEdit(int index, WALEdit walEdit) {
     this.walEditsFromCoprocessors[getAbsoluteIndex(index)] = walEdit;
   }
 
-  /**
-   * n * @return Gets the walEdit for the operation(Mutation) at the specified position.
-   */
+  /** Returns Gets the walEdit for the operation(Mutation) at the specified position. */
   public WALEdit getWalEdit(int index) {
     return this.walEditsFromCoprocessors[getAbsoluteIndex(index)];
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
index 48420c3c052..bc8f6620da0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MultiVersionConcurrencyControl.java
@@ -72,7 +72,7 @@ public class MultiVersionConcurrencyControl {
   }
 
   /**
-   * Step the MVCC forward on to a new read/write basis. n
+   * Step the MVCC forward on to a new read/write basis.
    */
   public void advanceTo(long newStartPoint) {
     while (true) {
@@ -172,7 +172,7 @@ public class MultiVersionConcurrencyControl {
    * this even if the write has FAILED (AFTER backing out the write transaction changes completely)
    * so we can clean up the outstanding transaction. How much is the read point advanced? Let S be
    * the set of all write numbers that are completed. Set the read point to the highest numbered
-   * write of S. n *
+   * write of S.
    * @return true if e is visible to MVCC readers (that is, readpoint >= e.writeNumber)
    */
   public boolean complete(WriteEntry writeEntry) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MutableOnlineRegions.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MutableOnlineRegions.java
index 7a1dc1c382f..5c619b83a26 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MutableOnlineRegions.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MutableOnlineRegions.java
@@ -28,7 +28,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface MutableOnlineRegions extends OnlineRegions {
 
   /**
-   * Add to online regions. n
+   * Add to online regions.
    */
   void addRegion(final HRegion r);
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OnlineRegions.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OnlineRegions.java
index 51566611652..d16e409a2fd 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OnlineRegions.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OnlineRegions.java
@@ -33,13 +33,15 @@ public interface OnlineRegions {
 
   /**
    * Return {@link Region} instance. Only works if caller is in same context, in same JVM. Region is
-   * not serializable. n * @return Region for the passed encoded <code>encodedRegionName</code> or
-   * null if named region is not member of the online regions.
+   * not serializable.
+   * @return Region for the passed encoded <code>encodedRegionName</code> or null if named region is
+   *         not member of the online regions.
    */
   Region getRegion(String encodedRegionName);
 
   /**
-   * Get all online regions of a table in this RS. n * @return List of Region
+   * Get all online regions of a table in this RS.
+   * @return List of Region
    * @throws java.io.IOException
    */
   List<? extends Region> getRegions(TableName tableName) throws IOException;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OperationStatus.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OperationStatus.java
index bf9b89dd65d..61b6bd0cf1b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OperationStatus.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/OperationStatus.java
@@ -66,22 +66,19 @@ public class OperationStatus {
   }
 
   /**
-   * n
-   */
+   *   */
   public OperationStatusCode getOperationStatusCode() {
     return code;
   }
 
   /**
-   * n
-   */
+   *   */
   public Result getResult() {
     return result;
   }
 
   /**
-   * n
-   */
+   *   */
   public String getExceptionMsg() {
     return exceptionMsg;
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
index 37e0135f080..157b3d6bd7d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
@@ -937,7 +937,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   }
 
   /**
-   * Execute a list of mutations. nnn
+   * Execute a list of mutations.
    */
   private void doBatchOp(final RegionActionResult.Builder builder, final HRegion region,
     final OperationQuota quota, final List<ClientProtos.Action> mutations, final CellScanner cells,
@@ -1109,9 +1109,9 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
 
   /**
    * Execute a list of Put/Delete mutations. The function returns OperationStatus instead of
-   * constructing MultiResponse to save a possible loop if caller doesn't need MultiResponse. nnn
-   * * @return an array of OperationStatus which internally contains the OperationStatusCode and the
-   * exceptionMessage if any n
+   * constructing MultiResponse to save a possible loop if caller doesn't need MultiResponse.
+   * @return an array of OperationStatus which internally contains the OperationStatusCode and the
+   *         exceptionMessage if any
    */
   private OperationStatus[] doReplayBatchOp(final HRegion region,
     final List<MutationReplay> mutations, long replaySeqId) throws IOException {
@@ -1574,7 +1574,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   }
 
   /*
-   * Check if an OOME and, if so, abort immediately to avoid creating more objects. n *
+   * Check if an OOME and, if so, abort immediately to avoid creating more objects.
    * @return True if we OOME'd and are aborting.
    */
   @Override
@@ -1605,7 +1605,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Close a region on the region server.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -1637,7 +1637,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Compact a region on the region server.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -1701,7 +1701,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Flush a region on the region server.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -1880,7 +1880,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Get some information of the region server.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -1981,7 +1981,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
    * errors are put in the response as FAILED_OPENING.
    * </p>
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -2162,7 +2162,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
    * that the given mutations will be durable on the receiving RS if this method returns without any
    * exception.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.REPLAY_QOS)
@@ -2291,7 +2291,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Roll the WAL writer of the region server.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   public RollWALWriterResponse rollWALWriter(final RpcController controller,
@@ -2312,7 +2312,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Stop the region server.
    * @param controller the RPC controller
-   * @param request    the request n
+   * @param request    the request
    */
   @Override
   @QosPriority(priority = HConstants.ADMIN_QOS)
@@ -2501,7 +2501,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Get data from a table.
    * @param controller the RPC controller
-   * @param request    the get request n
+   * @param request    the get request
    */
   @Override
   public GetResponse get(final RpcController controller, final GetRequest request)
@@ -2682,7 +2682,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Execute multiple actions on a table: get, mutate, and/or execCoprocessor
    * @param rpcc    the RPC controller
-   * @param request the multi request n
+   * @param request the multi request
    */
   @Override
   public MultiResponse multi(final RpcController rpcc, final MultiRequest request)
@@ -3477,7 +3477,7 @@ public class RSRpcServices implements HBaseRPCErrorHandler, AdminService.Blockin
   /**
    * Scan data in a table.
    * @param controller the RPC controller
-   * @param request    the scan request n
+   * @param request    the scan request
    */
   @Override
   public ScanResponse scan(final RpcController controller, final ScanRequest request)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java
index 786b012d2f1..11cf99b9dee 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Region.java
@@ -106,7 +106,7 @@ public interface Region extends ConfigurationObserver {
 
   /**
    * Check the region's underlying store files, open the files that have not been opened yet, and
-   * remove the store file readers for store files no longer available. n
+   * remove the store file readers for store files no longer available.
    */
   boolean refreshStoreFiles() throws IOException;
 
@@ -216,7 +216,7 @@ public interface Region extends ConfigurationObserver {
    * read lock and checks if the region is closing or closed.
    * <p>
    * {@link #closeRegionOperation} MUST then always be called after the operation has completed,
-   * whether it succeeded or failed. n
+   * whether it succeeded or failed.
    */
   // TODO Exposing this and closeRegionOperation() as we have getRowLock() exposed.
   // Remove if we get rid of exposing getRowLock().
@@ -228,18 +228,18 @@ public interface Region extends ConfigurationObserver {
    * <p>
    * {@link #closeRegionOperation} MUST then always be called after the operation has completed,
    * whether it succeeded or failed.
-   * @param op The operation is about to be taken on the region n
+   * @param op The operation is about to be taken on the region
    */
   void startRegionOperation(Operation op) throws IOException;
 
   /**
-   * Closes the region operation lock. n
+   * Closes the region operation lock.
    */
   void closeRegionOperation() throws IOException;
 
   /**
    * Closes the region operation lock. This needs to be called in the finally block corresponding to
-   * the try block of {@link #startRegionOperation(Operation)} n
+   * the try block of {@link #startRegionOperation(Operation)}
    */
   void closeRegionOperation(Operation op) throws IOException;
 
@@ -281,7 +281,8 @@ public interface Region extends ConfigurationObserver {
   // Region operations
 
   /**
-   * Perform one or more append operations on a row. n * @return result of the operation n
+   * Perform one or more append operations on a row.
+   * @return result of the operation
    */
   Result append(Append append) throws IOException;
 
@@ -292,7 +293,7 @@ public interface Region extends ConfigurationObserver {
    * previous operation in the same batch when performing the operations in the batch.
    * @param mutations the list of mutations
    * @return an array of OperationStatus which internally contains the OperationStatusCode and the
-   *         exceptionMessage if any. n
+   *         exceptionMessage if any.
    */
   OperationStatus[] batchMutate(Mutation[] mutations) throws IOException;
 
@@ -452,7 +453,7 @@ public interface Region extends ConfigurationObserver {
   CheckAndMutateResult checkAndMutate(CheckAndMutate checkAndMutate) throws IOException;
 
   /**
-   * Deletes the specified cells/row. nn
+   * Deletes the specified cells/row.
    */
   void delete(Delete delete) throws IOException;
 
@@ -476,7 +477,8 @@ public interface Region extends ConfigurationObserver {
    * specified by the {@link Scan}.
    * <p>
    * This Iterator must be closed by the caller.
-   * @param scan configured {@link Scan} n * @throws IOException read exceptions
+   * @param scan configured {@link Scan}
+   * @throws IOException read exceptions
    */
   RegionScanner getScanner(Scan scan) throws IOException;
 
@@ -488,8 +490,8 @@ public interface Region extends ConfigurationObserver {
    * <p>
    * This Iterator must be closed by the caller.
    * @param scan               configured {@link Scan}
-   * @param additionalScanners Any additional scanners to be used n * @throws IOException read
-   *                           exceptions
+   * @param additionalScanners Any additional scanners to be used
+   * @throws IOException read exceptions
    */
   RegionScanner getScanner(Scan scan, List<KeyValueScanner> additionalScanners) throws IOException;
 
@@ -497,7 +499,8 @@ public interface Region extends ConfigurationObserver {
   CellComparator getCellComparator();
 
   /**
-   * Perform one or more increment operations on a row. n * @return result of the operation n
+   * Perform one or more increment operations on a row.
+   * @return result of the operation
    */
   Result increment(Increment increment) throws IOException;
 
@@ -505,7 +508,7 @@ public interface Region extends ConfigurationObserver {
    * Performs multiple mutations atomically on a single row.
    * @param mutations object that specifies the set of mutations to perform atomically
    * @return results of Increment/Append operations. If no Increment/Append operations, it returns
-   *         null n
+   *         null
    */
   Result mutateRow(RowMutations mutations) throws IOException;
 
@@ -518,7 +521,7 @@ public interface Region extends ConfigurationObserver {
    * @param nonceGroup Optional nonce group of the operation (client Id)
    * @param nonce      Optional nonce of the operation (unique random id to ensure "more
    *                   idempotence") If multiple rows are locked care should be taken that
-   *                   <code>rowsToLock</code> is sorted in order to avoid deadlocks. n
+   *                   <code>rowsToLock</code> is sorted in order to avoid deadlocks.
    */
   // TODO Should not be exposing with params nonceGroup, nonce. Change when doing the jira for
   // Changing processRowsWithLocks and RowProcessor
@@ -567,7 +570,7 @@ public interface Region extends ConfigurationObserver {
     throws IOException;
 
   /**
-   * Puts some data in the table. nn
+   * Puts some data in the table.
    */
   void put(Put put) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
index 74c2e7cd4d0..0e608fc8dcd 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionCoprocessorHost.java
@@ -330,7 +330,7 @@ public class RegionCoprocessorHost
 
   /**
    * Sanity check the table coprocessor attributes of the supplied schema. Will throw an exception
-   * if there is a problem. nnn
+   * if there is a problem.
    */
   public static void testTableCoprocessorAttrs(final Configuration conf, final TableDescriptor htd)
     throws IOException {
@@ -568,7 +568,7 @@ public class RegionCoprocessorHost
    * @param store      The store where compaction is being requested
    * @param candidates The currently available store files
    * @param tracker    used to track the life cycle of a compaction
-   * @param user       the user n
+   * @param user       the user
    */
   public boolean preCompactSelection(final HStore store, final List<HStoreFile> candidates,
     final CompactionLifeCycleTracker tracker, final User user) throws IOException {
@@ -633,7 +633,7 @@ public class RegionCoprocessorHost
    * @param tracker  used to track the life cycle of a compaction
    * @param request  the compaction request
    * @param user     the user
-   * @return Scanner to use (cannot be null!) n
+   * @return Scanner to use (cannot be null!)
    */
   public InternalScanner preCompact(final HStore store, final InternalScanner scanner,
     final ScanType scanType, final CompactionLifeCycleTracker tracker,
@@ -662,7 +662,7 @@ public class RegionCoprocessorHost
    * @param resultFile the new store file written during compaction
    * @param tracker    used to track the life cycle of a compaction
    * @param request    the compaction request
-   * @param user       the user n
+   * @param user       the user
    */
   public void postCompact(final HStore store, final HStoreFile resultFile,
     final CompactionLifeCycleTracker tracker, final CompactionRequest request, final User user)
@@ -696,7 +696,7 @@ public class RegionCoprocessorHost
 
   /**
    * Invoked before a memstore flush
-   * @return Scanner to use (cannot be null!) n
+   * @return Scanner to use (cannot be null!)
    */
   public InternalScanner preFlush(HStore store, InternalScanner scanner,
     FlushLifeCycleTracker tracker) throws IOException {
@@ -717,7 +717,7 @@ public class RegionCoprocessorHost
   }
 
   /**
-   * Invoked before a memstore flush n
+   * Invoked before a memstore flush
    */
   public void preFlush(FlushLifeCycleTracker tracker) throws IOException {
     execOperation(coprocEnvironments.isEmpty() ? null : new RegionObserverOperationWithoutResult() {
@@ -729,7 +729,7 @@ public class RegionCoprocessorHost
   }
 
   /**
-   * Invoked after a memstore flush n
+   * Invoked after a memstore flush
    */
   public void postFlush(FlushLifeCycleTracker tracker) throws IOException {
     execOperation(coprocEnvironments.isEmpty() ? null : new RegionObserverOperationWithoutResult() {
@@ -796,7 +796,7 @@ public class RegionCoprocessorHost
   }
 
   /**
-   * Invoked after a memstore flush n
+   * Invoked after a memstore flush
    */
   public void postFlush(HStore store, HStoreFile storeFile, FlushLifeCycleTracker tracker)
     throws IOException {
@@ -1278,8 +1278,8 @@ public class RegionCoprocessorHost
   /**
    * @param s       the scanner
    * @param results the result set returned by the region server
-   * @param limit   the maximum number of results to return n * @return 'has more' indication to
-   *                give to client
+   * @param limit   the maximum number of results to return
+   * @return 'has more' indication to give to client
    * @exception IOException Exception
    */
   public boolean postScannerNext(final InternalScanner s, final List<Result> results,
@@ -1301,7 +1301,7 @@ public class RegionCoprocessorHost
    * filter.
    * @param s          the scanner
    * @param curRowCell The cell in the current row which got filtered out
-   * @return whether more rows are available for the scanner or not n
+   * @return whether more rows are available for the scanner or not
    */
   public boolean postScannerFilterRow(final InternalScanner s, final Cell curRowCell)
     throws IOException {
@@ -1462,7 +1462,7 @@ public class RegionCoprocessorHost
 
   /**
    * @param familyPaths pairs of { CF, file path } submitted for bulk load
-   * @param map         Map of CF to List of file paths for the final loaded files n
+   * @param map         Map of CF to List of file paths for the final loaded files
    */
   public void postBulkLoadHFile(final List<Pair<byte[], String>> familyPaths,
     Map<byte[], List<Path>> map) throws IOException {
@@ -1499,10 +1499,10 @@ public class RegionCoprocessorHost
    * @param fs   fileystem to read from
    * @param p    path to the file
    * @param in   {@link FSDataInputStreamWrapper}
-   * @param size Full size of the file n * @param r original reference file. This will be not null
-   *             only when reading a split file.
+   * @param size Full size of the file
+   * @param r    original reference file. This will be not null only when reading a split file.
    * @return a Reader instance to use instead of the base reader if overriding default behavior,
-   *         null otherwise n
+   *         null otherwise
    */
   public StoreFileReader preStoreFileReaderOpen(final FileSystem fs, final Path p,
     final FSDataInputStreamWrapper in, final long size, final CacheConfig cacheConf,
@@ -1523,10 +1523,10 @@ public class RegionCoprocessorHost
    * @param fs     fileystem to read from
    * @param p      path to the file
    * @param in     {@link FSDataInputStreamWrapper}
-   * @param size   Full size of the file n * @param r original reference file. This will be not null
-   *               only when reading a split file.
+   * @param size   Full size of the file
+   * @param r      original reference file. This will be not null only when reading a split file.
    * @param reader the base reader instance
-   * @return The reader to use n
+   * @return The reader to use
    */
   public StoreFileReader postStoreFileReaderOpen(final FileSystem fs, final Path p,
     final FSDataInputStreamWrapper in, final long size, final CacheConfig cacheConf,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScanner.java
index 0fc62c2710a..63fa962b078 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionScanner.java
@@ -42,7 +42,7 @@ public interface RegionScanner extends InternalScanner {
 
   /**
    * Do a reseek to the required row. Should not be used to seek to a key which may come before the
-   * current position. Always seeks to the beginning of a row boundary. nn * if row is null
+   * current position. Always seeks to the beginning of a row boundary. if row is null
    */
   boolean reseek(byte[] row) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.java
index 99c77d62172..68e2922a0f1 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionSplitPolicy.java
@@ -93,7 +93,8 @@ public abstract class RegionSplitPolicy extends Configured {
   }
 
   /**
-   * Create the RegionSplitPolicy configured for the given table. nn * @return a RegionSplitPolicy n
+   * Create the RegionSplitPolicy configured for the given table.
+   * @return a RegionSplitPolicy
    */
   public static RegionSplitPolicy create(HRegion region, Configuration conf) throws IOException {
     Preconditions.checkNotNull(region, "Region should not be null.");
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReplicationSinkService.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReplicationSinkService.java
index b0dc152d129..5f893efd88f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReplicationSinkService.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReplicationSinkService.java
@@ -39,7 +39,6 @@ public interface ReplicationSinkService extends ReplicationService {
    * @param sourceBaseNamespaceDirPath Path that point to the source cluster base namespace
    *                                   directory required for replicating hfiles
    * @param sourceHFileArchiveDirPath  Path that point to the source cluster hfile archive directory
-   *                                   n
    */
   void replicateLogEntries(List<WALEntry> entries, CellScanner cells, String replicationClusterId,
     String sourceBaseNamespaceDirPath, String sourceHFileArchiveDirPath) throws IOException;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedKeyValueHeap.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedKeyValueHeap.java
index b6fdd21b09c..60c634578aa 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedKeyValueHeap.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedKeyValueHeap.java
@@ -36,8 +36,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public class ReversedKeyValueHeap extends KeyValueHeap {
 
   /**
-   * nnn
-   */
+   *   */
   public ReversedKeyValueHeap(List<? extends KeyValueScanner> scanners, CellComparator comparator)
     throws IOException {
     super(scanners, new ReversedKVScannerComparator(comparator));
@@ -150,7 +149,7 @@ public class ReversedKeyValueHeap extends KeyValueHeap {
   private static class ReversedKVScannerComparator extends KVScannerComparator {
 
     /**
-     * Constructor n
+     * Constructor
      */
     public ReversedKVScannerComparator(CellComparator kvComparator) {
       super(kvComparator);
@@ -166,7 +165,8 @@ public class ReversedKeyValueHeap extends KeyValueHeap {
     }
 
     /**
-     * Compares rows of two KeyValue nn * @return less than 0 if left is smaller, 0 if equal etc..
+     * Compares rows of two KeyValue
+     * @return less than 0 if left is smaller, 0 if equal etc..
      */
     public int compareRows(Cell left, Cell right) {
       return super.kvComparator.compareRows(left, right);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedRegionScannerImpl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedRegionScannerImpl.java
index 263c2d163c3..ab8feecb1de 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedRegionScannerImpl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedRegionScannerImpl.java
@@ -36,8 +36,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 class ReversedRegionScannerImpl extends RegionScannerImpl {
 
   /**
-   * nnnn
-   */
+   *   */
   ReversedRegionScannerImpl(Scan scan, List<KeyValueScanner> additionalScanners, HRegion region)
     throws IOException {
     region.super(scan, additionalScanners, region);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.java
index eb1df834c7f..d0ea2e08d17 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ReversedStoreScanner.java
@@ -36,8 +36,9 @@ public class ReversedStoreScanner extends StoreScanner implements KeyValueScanne
   /**
    * Opens a scanner across memstore, snapshot, and all StoreFiles. Assumes we are not in a
    * compaction.
-   * @param store   who we scan n * @param scan the spec
-   * @param columns which columns we are scanning n
+   * @param store   who we scan
+   * @param scan    the spec
+   * @param columns which columns we are scanning
    */
   public ReversedStoreScanner(HStore store, ScanInfo scanInfo, Scan scan,
     NavigableSet<byte[]> columns, long readPt) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RowProcessor.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RowProcessor.java
index 7a7df45860c..6a252e6ff11 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RowProcessor.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RowProcessor.java
@@ -118,13 +118,13 @@ public interface RowProcessor<S extends Message, T extends Message> {
    * This method should return any additional data that is needed on the server side to construct
    * the RowProcessor. The server will pass this to the {@link #initialize(Message msg)} method. If
    * there is no RowProcessor specific data then null should be returned.
-   * @return the PB message n
+   * @return the PB message
    */
   S getRequestData() throws IOException;
 
   /**
    * This method should initialize any field(s) of the RowProcessor with a parsing of the passed
-   * message bytes (used on the server side). nn
+   * message bytes (used on the server side).
    */
   void initialize(S msg) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanInfo.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanInfo.java
index 7376854ccbd..b0c49711032 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanInfo.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScanInfo.java
@@ -53,7 +53,7 @@ public class ScanInfo {
       + (4 * Bytes.SIZEOF_LONG) + (4 * Bytes.SIZEOF_BOOLEAN));
 
   /**
-   * n * @param family {@link ColumnFamilyDescriptor} describing the column family
+   * @param family             {@link ColumnFamilyDescriptor} describing the column family
    * @param ttl                Store's TTL (in ms)
    * @param timeToPurgeDeletes duration in ms after which a delete marker can be purged during a
    *                           major compaction.
@@ -75,7 +75,7 @@ public class ScanInfo {
   }
 
   /**
-   * n * @param family Name of this store's column family
+   * @param family             Name of this store's column family
    * @param minVersions        Store's MIN_VERSIONS setting
    * @param maxVersions        Store's VERSIONS setting
    * @param ttl                Store's TTL (in ms)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScannerContext.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScannerContext.java
index 4e8e71db216..6bfaeaf3e41 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScannerContext.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ScannerContext.java
@@ -245,8 +245,8 @@ public class ScannerContext {
    * Note that this is not a typical setter. This setter returns the {@link NextState} that was
    * passed in so that methods can be invoked against the new state. Furthermore, this pattern
    * allows the {@link NoLimitScannerContext} to cleanly override this setter and simply return the
-   * new state, thus preserving the immutability of {@link NoLimitScannerContext} n * @return The
-   * state that was passed in.
+   * new state, thus preserving the immutability of {@link NoLimitScannerContext}
+   * @return The state that was passed in.
    */
   NextState setScannerState(NextState state) {
     if (!NextState.isValidState(state)) {
@@ -267,32 +267,24 @@ public class ScannerContext {
       || scannerState == NextState.BATCH_LIMIT_REACHED;
   }
 
-  /**
-   * n * @return true if the batch limit can be enforced in the checker's scope
-   */
+  /** Returns true if the batch limit can be enforced in the checker's scope */
   boolean hasBatchLimit(LimitScope checkerScope) {
     return limits.canEnforceBatchLimitFromScope(checkerScope) && limits.getBatch() > 0;
   }
 
-  /**
-   * n * @return true if the size limit can be enforced in the checker's scope
-   */
+  /** Returns true if the size limit can be enforced in the checker's scope */
   boolean hasSizeLimit(LimitScope checkerScope) {
     return limits.canEnforceSizeLimitFromScope(checkerScope)
       && (limits.getDataSize() > 0 || limits.getHeapSize() > 0);
   }
 
-  /**
-   * n * @return true if the time limit can be enforced in the checker's scope
-   */
+  /** Returns true if the time limit can be enforced in the checker's scope */
   boolean hasTimeLimit(LimitScope checkerScope) {
     return limits.canEnforceTimeLimitFromScope(checkerScope)
       && (limits.getTime() > 0 || returnImmediately);
   }
 
-  /**
-   * n * @return true if any limit can be enforced within the checker's scope
-   */
+  /** Returns true if any limit can be enforced within the checker's scope */
   boolean hasAnyLimit(LimitScope checkerScope) {
     return hasBatchLimit(checkerScope) || hasSizeLimit(checkerScope) || hasTimeLimit(checkerScope);
   }
@@ -609,9 +601,7 @@ public class ScannerContext {
       this.batch = batch;
     }
 
-    /**
-     * n * @return true when the limit can be enforced from the scope of the checker
-     */
+    /** Returns true when the limit can be enforced from the scope of the checker */
     boolean canEnforceBatchLimitFromScope(LimitScope checkerScope) {
       return LimitScope.BETWEEN_CELLS.canEnforceLimitFromScope(checkerScope);
     }
@@ -644,9 +634,7 @@ public class ScannerContext {
       this.sizeScope = scope;
     }
 
-    /**
-     * n * @return true when the limit can be enforced from the scope of the checker
-     */
+    /** Returns true when the limit can be enforced from the scope of the checker */
     boolean canEnforceSizeLimitFromScope(LimitScope checkerScope) {
       return this.sizeScope.canEnforceLimitFromScope(checkerScope);
     }
@@ -671,9 +659,7 @@ public class ScannerContext {
       this.timeScope = scope;
     }
 
-    /**
-     * n * @return true when the limit can be enforced from the scope of the checker
-     */
+    /** Returns true when the limit can be enforced from the scope of the checker */
     boolean canEnforceTimeLimitFromScope(LimitScope checkerScope) {
       return this.timeScope.canEnforceLimitFromScope(checkerScope);
     }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SecureBulkLoadManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SecureBulkLoadManager.java
index 76f0beadc28..847b86fc966 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SecureBulkLoadManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SecureBulkLoadManager.java
@@ -444,8 +444,8 @@ public class SecureBulkLoadManager {
     }
 
     /**
-     * Check if the path is referencing a file. This is mainly needed to avoid symlinks. n * @return
-     * true if the p is a file n
+     * Check if the path is referencing a file. This is mainly needed to avoid symlinks.
+     * @return true if the p is a file
      */
     private boolean isFile(Path p) throws IOException {
       FileStatus status = srcFs.getFileStatus(p);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SegmentFactory.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SegmentFactory.java
index 4a392b86a96..a05ac364fc0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SegmentFactory.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SegmentFactory.java
@@ -62,7 +62,7 @@ public final class SegmentFactory {
    * create empty immutable segment for initializations This ImmutableSegment is used as a place
    * holder for snapshot in Memstore. It won't flush later, So it is not necessary to record the
    * initial size for it.
-   * @param comparator comparator n
+   * @param comparator comparator
    */
   public ImmutableSegment createImmutableSegment(CellComparator comparator) {
     MutableSegment segment = generateMutableSegment(null, comparator, null, null);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShipperListener.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShipperListener.java
index 0881a80d510..fc85b5fa22a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShipperListener.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShipperListener.java
@@ -28,7 +28,7 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface ShipperListener {
 
   /**
-   * The action that needs to be performed before {@link Shipper#shipped()} is performed n
+   * The action that needs to be performed before {@link Shipper#shipped()} is performed
    */
   void beforeShipped() throws IOException;
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShutdownHook.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShutdownHook.java
index d84bf1c2d24..7bf4f3d2957 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShutdownHook.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ShutdownHook.java
@@ -67,8 +67,8 @@ public class ShutdownHook {
    * <p>
    * To suppress all shutdown hook handling -- both the running of the regionserver hook and of the
    * hdfs hook code -- set {@link ShutdownHook#RUN_SHUTDOWN_HOOK} in {@link Configuration} to
-   * <code>false</code>. This configuration value is checked when the hook code runs. n * @param fs
-   * Instance of Filesystem used by the RegionServer
+   * <code>false</code>. This configuration value is checked when the hook code runs.
+   * @param fs           Instance of Filesystem used by the RegionServer
    * @param stop         Installed shutdown hook will call stop against this passed
    *                     <code>Stoppable</code> instance.
    * @param threadToJoin After calling stop on <code>stop</code> will then join this thread.
@@ -241,7 +241,7 @@ public class ShutdownHook {
   /**
    * Main to test basic functionality. Run with clean hadoop 0.20 and hadoop 0.21 and cloudera
    * patched hadoop to make sure our shutdown hook handling works for all compbinations. Pass
-   * '-Dhbase.shutdown.hook=false' to test turning off the running of shutdown hooks. nn
+   * '-Dhbase.shutdown.hook=false' to test turning off the running of shutdown hooks.
    */
   public static void main(final String[] args) throws IOException {
     Configuration conf = HBaseConfiguration.create();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
index 5f9cfc09432..cd9348c43e6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/Store.java
@@ -201,7 +201,7 @@ public interface Store {
   /**
    * Checks the underlying store files, and opens the files that have not been opened, and removes
    * the store file readers for store files no longer available. Mainly used by secondary region
-   * replicas to keep up to date with the primary region files. n
+   * replicas to keep up to date with the primary region files.
    */
   void refreshStoreFiles() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileInfo.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileInfo.java
index 87d1762af8f..e014230ddf3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileInfo.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileInfo.java
@@ -232,14 +232,14 @@ public class StoreFileInfo {
   }
 
   /**
-   * Size of the Hfile n
+   * Size of the Hfile
    */
   public long getSize() {
     return size;
   }
 
   /**
-   * Sets the region coprocessor env. n
+   * Sets the region coprocessor env.
    */
   public void setRegionCoprocessorHost(RegionCoprocessorHost coprocessorHost) {
     this.coprocessorHost = coprocessorHost;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileManager.java
index 4ab1468fbff..c98bbb77f8d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileManager.java
@@ -60,7 +60,7 @@ public interface StoreFileManager {
 
   /**
    * Remove the compacted files
-   * @param compactedFiles the list of compacted files n
+   * @param compactedFiles the list of compacted files
    */
   void removeCompactedFiles(Collection<HStoreFile> compactedFiles) throws IOException;
 
@@ -137,7 +137,7 @@ public interface StoreFileManager {
 
   /**
    * Gets the split point for the split of this set of store files (approx. middle).
-   * @return The mid-point if possible. n
+   * @return The mid-point if possible.
    */
   Optional<byte[]> getSplitPoint() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java
index 4b20374acb9..a7039f9d6f6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileReader.java
@@ -191,8 +191,8 @@ public class StoreFileReader {
    * @deprecated since 2.0.0 and will be removed in 3.0.0. Do not write further code which depends
    *             on this call. Instead use getStoreFileScanner() which uses the StoreFileScanner
    *             class/interface which is the preferred way to scan a store with higher level
-   *             concepts. n * should we cache the blocks? n * use pread (for concurrent small
-   *             readers) n * is scanner being used for compaction?
+   *             concepts. should we cache the blocks? use pread (for concurrent small readers) is
+   *             scanner being used for compaction?
    * @return the underlying HFileScanner
    * @see <a href="https://issues.apache.org/jira/browse/HBASE-15296">HBASE-15296</a>
    */
@@ -311,7 +311,7 @@ public class StoreFileReader {
 
   /**
    * A method for checking Bloom filters. Called directly from StoreFileScanner in case of a
-   * multi-column query. n * the cell to check if present in BloomFilter
+   * multi-column query. the cell to check if present in BloomFilter
    * @return True if passes
    */
   public boolean passesGeneralRowColBloomFilter(Cell cell) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java
index ce2a3d6f249..74147f8ec05 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFileScanner.java
@@ -299,9 +299,7 @@ public class StoreFileScanner implements KeyValueScanner {
     closed = true;
   }
 
-  /**
-   * nn * @return false if not found or if k is after the end. n
-   */
+  /** Returns false if not found or if k is after the end. */
   public static boolean seekAtOrAfter(HFileScanner s, Cell k) throws IOException {
     int result = s.seekTo(k);
     if (result < 0) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlushContext.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlushContext.java
index c750167d2ae..9e748e4e7d9 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlushContext.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlushContext.java
@@ -46,7 +46,7 @@ interface StoreFlushContext {
   /**
    * Commit the flush - add the store file to the store and clear the memstore snapshot. Requires
    * pausing scans. A very short operation
-   * @return whether compaction is required n
+   * @return whether compaction is required
    */
   boolean commit(MonitoredTask status) throws IOException;
 
@@ -55,12 +55,12 @@ interface StoreFlushContext {
    * primary region. Adds the new files to the store, and drops the snapshot depending on
    * dropMemstoreSnapshot argument.
    * @param fileNames            names of the flushed files
-   * @param dropMemstoreSnapshot whether to drop the prepared memstore snapshot n
+   * @param dropMemstoreSnapshot whether to drop the prepared memstore snapshot
    */
   void replayFlush(List<String> fileNames, boolean dropMemstoreSnapshot) throws IOException;
 
   /**
-   * Abort the snapshot preparation. Drops the snapshot if any. n
+   * Abort the snapshot preparation. Drops the snapshot if any.
    */
   void abort() throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
index be5bffeaea3..eb8e58a7776 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
@@ -69,8 +69,8 @@ abstract class StoreFlusher {
   }
 
   /**
-   * Creates the scanner for flushing snapshot. Also calls coprocessors. n * @return The scanner;
-   * null if coprocessor is canceling the flush.
+   * Creates the scanner for flushing snapshot. Also calls coprocessors.
+   * @return The scanner; null if coprocessor is canceling the flush.
    */
   protected final InternalScanner createScanner(List<KeyValueScanner> snapshotScanners,
     FlushLifeCycleTracker tracker) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
index 93d2a752b9c..bf95289440f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java
@@ -225,7 +225,7 @@ public class StoreScanner extends NonReversedNonLazyKeyValueScanner
    * compaction.
    * @param store   who we scan
    * @param scan    the spec
-   * @param columns which columns we are scanning n
+   * @param columns which columns we are scanning
    */
   public StoreScanner(HStore store, ScanInfo scanInfo, Scan scan, NavigableSet<byte[]> columns,
     long readPt) throws IOException {
@@ -384,8 +384,9 @@ public class StoreScanner extends NonReversedNonLazyKeyValueScanner
   }
 
   /**
-   * Seek the specified scanners with the given key nn * @param isLazy true if using lazy seek
-   * @param isParallelSeek true if using parallel seek n
+   * Seek the specified scanners with the given key
+   * @param isLazy         true if using lazy seek
+   * @param isParallelSeek true if using parallel seek
    */
   protected void seekScanners(List<? extends KeyValueScanner> scanners, Cell seekKey,
     boolean isLazy, boolean isParallelSeek) throws IOException {
@@ -530,8 +531,8 @@ public class StoreScanner extends NonReversedNonLazyKeyValueScanner
   }
 
   /**
-   * Get the next row of values from this Store. nn * @return true if there are more rows, false if
-   * scanner is done
+   * Get the next row of values from this Store.
+   * @return true if there are more rows, false if scanner is done
    */
   @Override
   public boolean next(List<Cell> outResult, ScannerContext scannerContext) throws IOException {
@@ -1050,7 +1051,7 @@ public class StoreScanner extends NonReversedNonLazyKeyValueScanner
   }
 
   /**
-   * Check whether scan as expected order nnnn
+   * Check whether scan as expected order
    */
   protected void checkScanOrder(Cell prevKV, Cell kv, CellComparator comparator)
     throws IOException {
@@ -1064,8 +1065,8 @@ public class StoreScanner extends NonReversedNonLazyKeyValueScanner
   }
 
   /**
-   * Do a reseek in a normal StoreScanner(scan forward) n * @return true if scanner has values left,
-   * false if end of scanner n
+   * Do a reseek in a normal StoreScanner(scan forward)
+   * @return true if scanner has values left, false if end of scanner
    */
   protected boolean seekAsDirection(Cell kv) throws IOException {
     return reseek(kv);
@@ -1156,7 +1157,7 @@ public class StoreScanner extends NonReversedNonLazyKeyValueScanner
   /**
    * Seek storefiles in parallel to optimize IO latency as much as possible
    * @param scanners the list {@link KeyValueScanner}s to be read from
-   * @param kv       the KeyValue on which the operation is being requested n
+   * @param kv       the KeyValue on which the operation is being requested
    */
   private void parallelSeek(final List<? extends KeyValueScanner> scanners, final Cell kv)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/TimeRangeTracker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/TimeRangeTracker.java
index 74d7ee248c9..7fc79642d91 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/TimeRangeTracker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/TimeRangeTracker.java
@@ -183,7 +183,7 @@ public abstract class TimeRangeTracker {
   /**
    * @param data the serialization data. It can't be null!
    * @return An instance of NonSyncTimeRangeTracker filled w/ the content of serialized
-   *         NonSyncTimeRangeTracker in <code>timeRangeTrackerBytes</code>. n
+   *         NonSyncTimeRangeTracker in <code>timeRangeTrackerBytes</code>.
    */
   public static TimeRangeTracker parseFrom(final byte[] data) throws IOException {
     return parseFrom(data, Type.NON_SYNC);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactionProgress.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactionProgress.java
index 55c498447a4..0c9df200b1d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactionProgress.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/CompactionProgress.java
@@ -47,7 +47,7 @@ public class CompactionProgress {
   }
 
   /**
-   * getter for calculated percent complete n
+   * getter for calculated percent complete
    */
   public float getProgressPct() {
     return (float) currentCompactedKVs / getTotalCompactingKVs();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/DefaultCompactor.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/DefaultCompactor.java
index cde8db5b230..8cfb8d738b2 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/DefaultCompactor.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/DefaultCompactor.java
@@ -72,7 +72,7 @@ public class DefaultCompactor extends Compactor<StoreFileWriter> {
    *                       generated {@link CompactionRequestImpl}.
    * @param isMajor        true to major compact (prune all deletes, max versions, etc)
    * @return Product of compaction or an empty list if all cells expired or deleted and nothing \
-   *         made it through the compaction. n
+   *         made it through the compaction.
    */
   public List<Path> compactForTesting(Collection<HStoreFile> filesToCompact, boolean isMajor)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.java
index 2b54081642f..142ee02b5da 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/ExploringCompactionPolicy.java
@@ -165,8 +165,12 @@ public class ExploringCompactionPolicy extends RatioBasedCompactionPolicy {
   }
 
   /**
-   * Check that all files satisfy the constraint FileSize(i) <= ( Sum(0,N,FileSize(_)) - FileSize(i)
-   * ) * Ratio.
+   * Check that all files satisfy the constraint
+   *
+   * <pre>
+   * FileSize(i) <= ( Sum(0,N,FileSize(_)) - FileSize(i)) * Ratio.
+   * </pre>
+   *
    * @param files        List of store files to consider as a compaction candidate.
    * @param currentRatio The ratio to use.
    * @return a boolean if these files satisfy the ratio constraints.
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/SortedCompactionPolicy.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/SortedCompactionPolicy.java
index 1d039de96fb..d83107a10b9 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/SortedCompactionPolicy.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/compactions/SortedCompactionPolicy.java
@@ -118,9 +118,7 @@ public abstract class SortedCompactionPolicy extends CompactionPolicy {
   public abstract boolean shouldPerformMajorCompaction(Collection<HStoreFile> filesToCompact)
     throws IOException;
 
-  /**
-   * n * @return When to run next major compaction
-   */
+  /** Returns When to run next major compaction */
   public long getNextMajorCompactTime(Collection<HStoreFile> filesToCompact) {
     /** Default to {@link org.apache.hadoop.hbase.HConstants#DEFAULT_MAJOR_COMPACTION_PERIOD}. */
     long period = comConf.getMajorCompactionPeriod();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ColumnTracker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ColumnTracker.java
index af02d71788f..db4d8050862 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ColumnTracker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ColumnTracker.java
@@ -104,20 +104,21 @@ public interface ColumnTracker extends ShipperListener {
   ColumnCount getColumnHint();
 
   /**
-   * Retrieve the MatchCode for the next row or column n
+   * Retrieve the MatchCode for the next row or column
    */
   MatchCode getNextRowOrNextColumn(Cell cell);
 
   /**
    * Give the tracker a chance to declare it's done based on only the timestamp to allow an early
-   * out. n * @return <code>true</code> to early out based on timestamp.
+   * out.
+   * @return <code>true</code> to early out based on timestamp.
    */
   boolean isDone(long timestamp);
 
   /**
    * This method is used to inform the column tracker that we are done with this column. We may get
    * this information from external filters or timestamp range and we then need to indicate this
-   * information to tracker. It is currently implemented for ExplicitColumnTracker. n
+   * information to tracker. It is currently implemented for ExplicitColumnTracker.
    */
   default void doneWithColumn(Cell cell) {
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanDeleteTracker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanDeleteTracker.java
index 3557973aae5..8fdee2da524 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanDeleteTracker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanDeleteTracker.java
@@ -96,7 +96,7 @@ public class ScanDeleteTracker implements DeleteTracker {
 
   /**
    * Check if the specified Cell buffer has been deleted by a previously seen delete.
-   * @param cell - current cell to check if deleted by a previously seen delete n
+   * @param cell - current cell to check if deleted by a previously seen delete
    */
   @Override
   public DeleteResult isDeleted(Cell cell) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.java
index ec6632730e4..2ab3d68fca1 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanQueryMatcher.java
@@ -137,9 +137,7 @@ public abstract class ScanQueryMatcher implements ShipperListener {
     this.columns = columns;
   }
 
-  /**
-   * nn * @return true if the cell is expired
-   */
+  /** Returns true if the cell is expired */
   private static boolean isCellTTLExpired(final Cell cell, final long oldestTimestamp,
     final long now) {
     // Look for a TTL tag first. Use it instead of the family setting if
@@ -261,7 +259,7 @@ public abstract class ScanQueryMatcher implements ShipperListener {
   protected abstract void reset();
 
   /**
-   * Set the row when there is change in row n
+   * Set the row when there is change in row
    */
   public void setToNewRow(Cell currentRow) {
     this.currentRow = currentRow;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanWildcardColumnTracker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanWildcardColumnTracker.java
index 4d84e5a0fdf..ea0afee2178 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanWildcardColumnTracker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/querymatcher/ScanWildcardColumnTracker.java
@@ -184,7 +184,7 @@ public class ScanWildcardColumnTracker implements ColumnTracker {
   }
 
   /**
-   * We can never know a-priori if we are done, so always return false. n
+   * We can never know a-priori if we are done, so always return false.
    */
   @Override
   public boolean done() {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.java
index 2cb5b7e6f47..8d26583a0df 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/snapshot/RegionServerSnapshotManager.java
@@ -129,7 +129,7 @@ public class RegionServerSnapshotManager extends RegionServerProcedureManager {
 
   /**
    * Close <tt>this</tt> and all running snapshot tasks
-   * @param force forcefully stop all running tasks n
+   * @param force forcefully stop all running tasks
    */
   @Override
   public void stop(boolean force) throws IOException {
@@ -147,7 +147,8 @@ public class RegionServerSnapshotManager extends RegionServerProcedureManager {
    * If in a running state, creates the specified subprocedure for handling an online snapshot.
    * Because this gets the local list of regions to snapshot and not the set the master had, there
    * is a possibility of a race where regions may be missed. This detected by the master in the
-   * snapshot verification step. n * @return Subprocedure to submit to the ProcedureMember.
+   * snapshot verification step.
+   * @return Subprocedure to submit to the ProcedureMember.
    */
   public Subprocedure buildSubprocedure(SnapshotDescription snapshot) {
 
@@ -209,8 +210,9 @@ public class RegionServerSnapshotManager extends RegionServerProcedureManager {
    * miss some regions. For example, a region move during a snapshot could result in a region to be
    * skipped or done twice. This is manageable because the {@link MasterSnapshotVerifier} will
    * double check the region lists after the online portion of the snapshot completes and will
-   * explicitly fail the snapshot. n * @return the list of online regions. Empty list is returned if
-   * no regions are responsible for the given snapshot. n
+   * explicitly fail the snapshot.
+   * @return the list of online regions. Empty list is returned if no regions are responsible for
+   *         the given snapshot.
    */
   private List<HRegion> getRegionsToSnapshot(SnapshotDescription snapshot) throws IOException {
     List<HRegion> onlineRegions =
@@ -292,8 +294,8 @@ public class RegionServerSnapshotManager extends RegionServerProcedureManager {
     /**
      * Wait for all of the currently outstanding tasks submitted via {@link #submitTask(Callable)}.
      * This *must* be called after all tasks are submitted via submitTask.
-     * @return <tt>true</tt> on success, <tt>false</tt> otherwise n * @throws
-     *         SnapshotCreationException if the snapshot failed while we were waiting
+     * @return <tt>true</tt> on success, <tt>false</tt> otherwise
+     * @throws SnapshotCreationException if the snapshot failed while we were waiting
      */
     boolean waitForOutstandingTasks() throws ForeignException, InterruptedException {
       LOG.debug("Waiting for local region snapshots to finish.");
@@ -336,7 +338,7 @@ public class RegionServerSnapshotManager extends RegionServerProcedureManager {
     }
 
     /**
-     * This attempts to cancel out all pending and in progress tasks (interruptions issues) n
+     * This attempts to cancel out all pending and in progress tasks (interruptions issues)
      */
     void cancelTasks() throws InterruptedException {
       Collection<Future<Void>> tasks = futures;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
index ef8e171701b..5c8a536d0f3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AbstractFSWAL.java
@@ -549,7 +549,7 @@ public abstract class AbstractFSWAL<W extends WriterBase> implements WAL {
 
   /**
    * This is a convenience method that computes a new filename with a given file-number.
-   * @param filenum to use n
+   * @param filenum to use
    */
   protected Path computeFilename(final long filenum) {
     if (filenum < 0) {
@@ -561,7 +561,7 @@ public abstract class AbstractFSWAL<W extends WriterBase> implements WAL {
 
   /**
    * This is a convenience method that computes a new filename with a given using the current WAL
-   * file-number n
+   * file-number
    */
   public Path getCurrentFileName() {
     return computeFilename(this.filenum.get());
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
index a0c6bdb5b03..72920d5f467 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/ProtobufLogReader.java
@@ -259,7 +259,7 @@ public class ProtobufLogReader extends ReaderBase {
    * </ul>
    * <p>
    * In case the trailer size > this.trailerMaxSize, it is read after a WARN message.
-   * @return true if a valid trailer is present n
+   * @return true if a valid trailer is present
    */
   private boolean setTrailerIfPresent() {
     try {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.java
index 64fe638eca7..dad49cb205e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SequenceIdAccounting.java
@@ -161,7 +161,8 @@ class SequenceIdAccounting {
   /**
    * We've been passed a new sequenceid for the region. Set it as highest seen for this region and
    * if we are to record oldest, or lowest sequenceids, save it as oldest seen if nothing currently
-   * older. nnn * @param lowest Whether to keep running account of oldest sequence id.
+   * older.
+   * @param lowest Whether to keep running account of oldest sequence id.
    */
   void update(byte[] encodedRegionName, Set<byte[]> families, long sequenceid,
     final boolean lowest) {
@@ -259,8 +260,8 @@ class SequenceIdAccounting {
   }
 
   /**
-   * n * @return New Map that has same keys as <code>src</code> but instead of a Map for a value, it
-   * instead has found the smallest sequence id and it returns that as the value instead.
+   * @return New Map that has same keys as <code>src</code> but instead of a Map for a value, it
+   *         instead has found the smallest sequence id and it returns that as the value instead.
    */
   private <T extends Map<?, Long>> Map<byte[], Long> flattenToLowestSequenceId(Map<byte[], T> src) {
     if (src == null || src.isEmpty()) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
index 90825d4884c..954c4c87820 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/SyncFuture.java
@@ -93,7 +93,7 @@ class SyncFuture {
 
   /**
    * Call this method to clear old usage and get it ready for new deploy.
-   * @param txid the new transaction id n
+   * @param txid the new transaction id
    */
   SyncFuture reset(long txid, boolean forceSync) {
     if (t != null && t != Thread.currentThread()) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALActionsListener.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALActionsListener.java
index 9117d03cab2..729b571a6f9 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALActionsListener.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/WALActionsListener.java
@@ -96,9 +96,10 @@ public interface WALActionsListener {
   }
 
   /**
-   * n * @param logEdit TODO: Retire this in favor of
-   * {@link #visitLogEntryBeforeWrite(RegionInfo, WALKey, WALEdit)} It only exists to get scope when
-   * replicating. Scope should be in the WALKey and not need us passing in a <code>htd</code>.
+   * @param logEdit TODO: Retire this in favor of
+   *                {@link #visitLogEntryBeforeWrite(RegionInfo, WALKey, WALEdit)} It only exists to
+   *                get scope when replicating. Scope should be in the WALKey and not need us
+   *                passing in a <code>htd</code>.
    * @throws IOException If failed to parse the WALEdit
    */
   default void visitLogEntryBeforeWrite(WALKey logKey, WALEdit logEdit) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/HBaseReplicationEndpoint.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/HBaseReplicationEndpoint.java
index b6d4fbb5488..9172262096e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/HBaseReplicationEndpoint.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/HBaseReplicationEndpoint.java
@@ -58,7 +58,7 @@ public abstract class HBaseReplicationEndpoint extends BaseReplicationEndpoint
   }
 
   /**
-   * A private method used to re-establish a zookeeper session with a peer cluster. n
+   * A private method used to re-establish a zookeeper session with a peer cluster.
    */
   protected void reconnect(KeeperException ke) {
     if (
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/DumpReplicationQueues.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/DumpReplicationQueues.java
index 8db7c610dfe..d95776c9304 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/DumpReplicationQueues.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/DumpReplicationQueues.java
@@ -146,7 +146,7 @@ public class DumpReplicationQueues extends Configured implements Tool {
   }
 
   /**
-   * Main nn
+   * Main
    */
   public static void main(String[] args) throws Exception {
     Configuration conf = HBaseConfiguration.create();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSink.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSink.java
index a1b530b039f..80b97c1713b 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSink.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSink.java
@@ -61,7 +61,7 @@ public class MetricsSink {
   }
 
   /**
-   * Convience method to change metrics when a batch of operations are applied. n
+   * Convience method to change metrics when a batch of operations are applied.
    */
   public void applyBatch(long batchSize) {
     mss.incrAppliedBatches(1);
@@ -86,14 +86,14 @@ public class MetricsSink {
   }
 
   /**
-   * Get the count of the failed bathes n
+   * Get the count of the failed bathes
    */
   protected long getFailedBatches() {
     return mss.getFailedBatches();
   }
 
   /**
-   * Get the Age of Last Applied Op n
+   * Get the Age of Last Applied Op
    */
   public long getAgeOfLastAppliedOp() {
     return mss.getLastAppliedOpAge();
@@ -121,14 +121,14 @@ public class MetricsSink {
   }
 
   /**
-   * Gets the time stamp from when the Sink was initialized. n
+   * Gets the time stamp from when the Sink was initialized.
    */
   public long getStartTimestamp() {
     return this.startTimestamp;
   }
 
   /**
-   * Gets the total number of OPs delivered to this sink. n
+   * Gets the total number of OPs delivered to this sink.
    */
   public long getAppliedOps() {
     return this.mss.getSinkAppliedOps();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSource.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSource.java
index 463e618752e..69671c13b61 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSource.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/MetricsSource.java
@@ -127,7 +127,7 @@ public class MetricsSource implements BaseSource {
 
   /**
    * get age of last shipped op of given wal group. If the walGroup is null, return 0
-   * @param walGroup which group we are getting n
+   * @param walGroup which group we are getting
    */
   public long getAgeOfLastShippedOp(String walGroup) {
     return this.ageOfLastShippedOp.get(walGroup) == null ? 0 : ageOfLastShippedOp.get(walGroup);
@@ -283,22 +283,22 @@ public class MetricsSource implements BaseSource {
   }
 
   /**
-   * Get AgeOfLastShippedOp n
+   * Get AgeOfLastShippedOp
    */
   public Long getAgeOfLastShippedOp() {
     return singleSourceSource.getLastShippedAge();
   }
 
   /**
-   * Get the sizeOfLogQueue n
+   * Get the sizeOfLogQueue
    */
   public int getSizeOfLogQueue() {
     return singleSourceSource.getSizeOfLogQueue();
   }
 
   /**
-   * Get the timeStampsOfLastShippedOp, if there are multiple groups, return the latest one n
-   * * @deprecated Since 2.0.0. Removed in 3.0.0.
+   * Get the timeStampsOfLastShippedOp, if there are multiple groups, return the latest one
+   * @deprecated Since 2.0.0. Removed in 3.0.0.
    * @see #getTimestampOfLastShippedOp()
    */
   @Deprecated
@@ -307,14 +307,14 @@ public class MetricsSource implements BaseSource {
   }
 
   /**
-   * Get the value of uncleanlyClosedWAL counter n
+   * Get the value of uncleanlyClosedWAL counter
    */
   public long getUncleanlyClosedWALs() {
     return singleSourceSource.getUncleanlyClosedWALs();
   }
 
   /**
-   * Get the timestampsOfLastShippedOp, if there are multiple groups, return the latest one n
+   * Get the timestampsOfLastShippedOp, if there are multiple groups, return the latest one
    */
   public long getTimestampOfLastShippedOp() {
     long lastTimestamp = 0L;
@@ -361,7 +361,7 @@ public class MetricsSource implements BaseSource {
   }
 
   /**
-   * Get the slave peer ID n
+   * Get the slave peer ID
    */
   public String getPeerID() {
     return id;
@@ -507,7 +507,7 @@ public class MetricsSource implements BaseSource {
   }
 
   /**
-   * Returns the amount of memory in bytes used in this RegionServer by edits pending replication. n
+   * Returns the amount of memory in bytes used in this RegionServer by edits pending replication.
    */
   public long getWALReaderEditsBufferUsage() {
     return globalSourceSource.getWALReaderEditsBufferBytes();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/Replication.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/Replication.java
index a5940655cac..a71ee9e4b50 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/Replication.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/Replication.java
@@ -175,7 +175,6 @@ public class Replication implements ReplicationSourceService, ReplicationSinkSer
    * @param sourceBaseNamespaceDirPath Path that point to the source cluster base namespace
    *                                   directory required for replicating hfiles
    * @param sourceHFileArchiveDirPath  Path that point to the source cluster hfile archive directory
-   *                                   n
    */
   @Override
   public void replicateLogEntries(List<WALEntry> entries, CellScanner cells,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationLoad.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationLoad.java
index 6cfe61f3943..4282579cb99 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationLoad.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationLoad.java
@@ -45,7 +45,7 @@ public class ReplicationLoad {
 
   /**
    * buildReplicationLoad
-   * @param sources List of ReplicationSource instances for which metrics should be reported n
+   * @param sources List of ReplicationSource instances for which metrics should be reported
    */
 
   public void buildReplicationLoad(final List<ReplicationSourceInterface> sources,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSink.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSink.java
index 616dcfeb8cc..cac885dcafc 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSink.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSink.java
@@ -346,9 +346,7 @@ public class ReplicationSink {
       .append(Bytes.toString(family)).append(Path.SEPARATOR).append(storeFile).toString();
   }
 
-  /**
-   * nn * @return True if we have crossed over onto a new row or type
-   */
+  /** Returns True if we have crossed over onto a new row or type */
   private boolean isNewRowOrType(final Cell previousCell, final Cell cell) {
     return previousCell == null || previousCell.getTypeByte() != cell.getTypeByte()
       || !CellUtil.matchingRows(previousCell, cell);
@@ -359,8 +357,8 @@ public class ReplicationSink {
   }
 
   /**
-   * Simple helper to a map from key to (a list of) values TODO: Make a general utility method nnnn
-   * * @return the list of values corresponding to key1 and key2
+   * Simple helper to a map from key to (a list of) values TODO: Make a general utility method
+   * @return the list of values corresponding to key1 and key2
    */
   private <K1, K2, V> List<V> addToHashMultiMap(Map<K1, Map<K2, List<V>>> map, K1 key1, K2 key2,
     V value) {
@@ -457,7 +455,7 @@ public class ReplicationSink {
   }
 
   /**
-   * Get replication Sink Metrics n
+   * Get replication Sink Metrics
    */
   public MetricsSink getSinkMetrics() {
     return this.metrics;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSinkManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSinkManager.java
index 72209cd89c1..e8b4c46e055 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSinkManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSinkManager.java
@@ -121,7 +121,7 @@ public class ReplicationSinkManager {
   /**
    * Report a {@code SinkPeer} as being bad (i.e. an attempt to replicate to it failed). If a single
    * SinkPeer is reported as bad more than replication.bad.sink.threshold times, it will be removed
-   * from the pool of potential replication targets. n * The SinkPeer that had a failed replication
+   * from the pool of potential replication targets. The SinkPeer that had a failed replication
    * attempt on it
    */
   public synchronized void reportBadSink(SinkPeer sinkPeer) {
@@ -138,8 +138,8 @@ public class ReplicationSinkManager {
   }
 
   /**
-   * Report that a {@code SinkPeer} successfully replicated a chunk of data. n * The SinkPeer that
-   * had a failed replication attempt on it
+   * Report that a {@code SinkPeer} successfully replicated a chunk of data. The SinkPeer that had a
+   * failed replication attempt on it
    */
   public synchronized void reportSinkSuccess(SinkPeer sinkPeer) {
     badReportCounts.remove(sinkPeer.getServerName());
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
index 128d5b290e5..4c488e1abcf 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java
@@ -394,7 +394,7 @@ public class ReplicationSourceManager implements ReplicationListener {
    * Close the previous replication sources of this peer id and open new sources to trigger the new
    * replication state changes or new replication config changes. Here we don't need to change
    * replication queue storage and only to enqueue all logs to the new replication source
-   * @param peerId the id of the replication peer n
+   * @param peerId the id of the replication peer
    */
   public void refreshSources(String peerId) throws IOException {
     String terminateMessage = "Peer " + peerId
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessChecker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessChecker.java
index 8912c34c51b..57d156ab1c2 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessChecker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessChecker.java
@@ -458,7 +458,7 @@ public class AccessChecker {
 
   /**
    * Retrieve the groups of the given user.
-   * @param user User name n
+   * @param user User name
    */
   public static List<String> getUserGroups(String user) {
     try {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java
index 27bd5e98f4f..f8ab32973f1 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AccessController.java
@@ -426,7 +426,7 @@ public class AccessController implements MasterCoprocessor, RegionCoprocessor,
 
   /**
    * Determine if cell ACLs covered by the operation grant access. This is expensive.
-   * @return false if cell ACLs failed to grant access, true otherwise n
+   * @return false if cell ACLs failed to grant access, true otherwise
    */
   private boolean checkCoveringPermission(User user, OpType request, RegionCoprocessorEnvironment e,
     byte[] row, Map<byte[], ? extends Collection<?>> familyMap, long opTs, Action... actions)
@@ -1007,7 +1007,7 @@ public class AccessController implements MasterCoprocessor, RegionCoprocessor,
   }
 
   /**
-   * Create the ACL table n
+   * Create the ACL table
    */
   private static void createACLTable(Admin admin) throws IOException {
     /** Table descriptor for ACL table */
@@ -1808,7 +1808,7 @@ public class AccessController implements MasterCoprocessor, RegionCoprocessor,
 
   /**
    * Authorization check for SecureBulkLoadProtocol.prepareBulkLoad()
-   * @param ctx the context n
+   * @param ctx the context
    */
   @Override
   public void prePrepareBulkLoad(ObserverContext<RegionCoprocessorEnvironment> ctx)
@@ -1820,7 +1820,7 @@ public class AccessController implements MasterCoprocessor, RegionCoprocessor,
 
   /**
    * Authorization security check for SecureBulkLoadProtocol.cleanupBulkLoad()
-   * @param ctx the context n
+   * @param ctx the context
    */
   @Override
   public void preCleanupBulkLoad(ObserverContext<RegionCoprocessorEnvironment> ctx)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AuthManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AuthManager.java
index a24e9d66ced..023eccbd27d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AuthManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/AuthManager.java
@@ -490,7 +490,7 @@ public final class AuthManager {
   }
 
   /**
-   * Last modification logical time n
+   * Last modification logical time
    */
   public long getMTime() {
     return mtime.get();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/ZKPermissionWatcher.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/ZKPermissionWatcher.java
index 5d674c78cdc..7bdef4b6649 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/ZKPermissionWatcher.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/access/ZKPermissionWatcher.java
@@ -254,7 +254,7 @@ public class ZKPermissionWatcher extends ZKListener implements Closeable {
   }
 
   /***
-   * Write a table's access controls to the permissions mirror in zookeeper nn
+   * Write a table's access controls to the permissions mirror in zookeeper
    */
   public void writeToZookeeper(byte[] entry, byte[] permsData) {
     String entryName = Bytes.toString(entry);
@@ -271,7 +271,7 @@ public class ZKPermissionWatcher extends ZKListener implements Closeable {
   }
 
   /***
-   * Delete the acl notify node of table n
+   * Delete the acl notify node of table
    */
   public void deleteTableACLNode(final TableName tableName) {
     String zkNode = ZNodePaths.joinZNode(watcher.getZNodePaths().baseZNode, ACL_NODE);
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/DefaultVisibilityLabelServiceImpl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/DefaultVisibilityLabelServiceImpl.java
index b6163123cbf..9d9f90765c7 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/DefaultVisibilityLabelServiceImpl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/DefaultVisibilityLabelServiceImpl.java
@@ -320,7 +320,8 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
   /**
    * Adds the mutations to labels region and set the results to the finalOpStatus. finalOpStatus
    * might have some entries in it where the OpStatus is FAILURE. We will leave those and set in
-   * others in the order. nn * @return whether we need a ZK update or not.
+   * others in the order.
+   * @return whether we need a ZK update or not.
    */
   private boolean mutateLabelsRegion(List<Mutation> mutations, OperationStatus[] finalOpStatus)
     throws IOException {
@@ -687,7 +688,7 @@ public class DefaultVisibilityLabelServiceImpl implements VisibilityLabelService
   }
 
   /**
-   * n * - all the visibility tags associated with the current Cell
+   * - all the visibility tags associated with the current Cell
    * @return - the modified visibility expression as byte[]
    */
   private byte[] createModifiedVisExpression(final List<Tag> tags) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ScanLabelGenerator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ScanLabelGenerator.java
index 3f969ef64f4..d635e43e27f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ScanLabelGenerator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ScanLabelGenerator.java
@@ -30,7 +30,8 @@ import org.apache.yetus.audience.InterfaceAudience;
 public interface ScanLabelGenerator extends Configurable {
 
   /**
-   * Helps to get a list of lables associated with an UGI nn * @return The labels
+   * Helps to get a list of lables associated with an UGI
+   * @return The labels
    */
   public List<String> getLabels(User user, Authorizations authorizations);
 }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityController.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityController.java
index 77403d975b4..0996969380c 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityController.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityController.java
@@ -1020,9 +1020,7 @@ public class VisibilityController implements MasterCoprocessor, RegionCoprocesso
     }
   }
 
-  /**
-   * n * @return NameValuePair of the exception name to stringified version os exception.
-   */
+  /** Returns NameValuePair of the exception name to stringified version os exception. */
   // Copied from ResponseConverter and made private. Only used in here.
   private static NameBytesPair buildException(final Throwable t) {
     NameBytesPair.Builder parameterBuilder = NameBytesPair.newBuilder();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelService.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelService.java
index a55ab2aae22..ecf19a52dff 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelService.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelService.java
@@ -36,40 +36,40 @@ public interface VisibilityLabelService extends Configurable {
 
   /**
    * System calls this after opening of regions. Gives a chance for the VisibilityLabelService to so
-   * any initialization logic. n * the region coprocessor env
+   * any initialization logic. the region coprocessor env
    */
   void init(RegionCoprocessorEnvironment e) throws IOException;
 
   /**
-   * Adds the set of labels into the system. n * Labels to add to the system.
+   * Adds the set of labels into the system. Labels to add to the system.
    * @return OperationStatus for each of the label addition
    */
   OperationStatus[] addLabels(List<byte[]> labels) throws IOException;
 
   /**
-   * Sets given labels globally authorized for the user. n * The authorizing user n * Labels which
-   * are getting authorized for the user
+   * Sets given labels globally authorized for the user. The authorizing user Labels which are
+   * getting authorized for the user
    * @return OperationStatus for each of the label auth addition
    */
   OperationStatus[] setAuths(byte[] user, List<byte[]> authLabels) throws IOException;
 
   /**
-   * Removes given labels from user's globally authorized list of labels. n * The user whose
-   * authorization to be removed n * Labels which are getting removed from authorization set
+   * Removes given labels from user's globally authorized list of labels. The user whose
+   * authorization to be removed Labels which are getting removed from authorization set
    * @return OperationStatus for each of the label auth removal
    */
   OperationStatus[] clearAuths(byte[] user, List<byte[]> authLabels) throws IOException;
 
   /**
-   * Retrieve the visibility labels for the user. n * Name of the user whose authorization to be
-   * retrieved n * Whether a system or user originated call.
+   * Retrieve the visibility labels for the user. Name of the user whose authorization to be
+   * retrieved Whether a system or user originated call.
    * @return Visibility labels authorized for the given user.
    */
   List<String> getUserAuths(byte[] user, boolean systemCall) throws IOException;
 
   /**
-   * Retrieve the visibility labels for the groups. n * Name of the groups whose authorization to be
-   * retrieved n * Whether a system or user originated call.
+   * Retrieve the visibility labels for the groups. Name of the groups whose authorization to be
+   * retrieved Whether a system or user originated call.
    * @return Visibility labels authorized for the given group.
    */
   List<String> getGroupAuths(String[] groups, boolean systemCall) throws IOException;
@@ -101,7 +101,7 @@ public interface VisibilityLabelService extends Configurable {
   /**
    * Creates VisibilityExpEvaluator corresponding to given Authorizations. <br>
    * Note: This will be concurrently called from multiple threads and implementation should take
-   * care of thread safety. n * Authorizations for the read request
+   * care of thread safety. Authorizations for the read request
    * @return The VisibilityExpEvaluator corresponding to the given set of authorization labels.
    */
   VisibilityExpEvaluator getVisibilityExpEvaluator(Authorizations authorizations)
@@ -110,8 +110,8 @@ public interface VisibilityLabelService extends Configurable {
   /**
    * System checks for user auth during admin operations. (ie. Label add, set/clear auth). The
    * operation is allowed only for users having system auth. Also during read, if the requesting
-   * user has system auth, he can view all the data irrespective of its labels. n * User for whom
-   * system auth check to be done.
+   * user has system auth, he can view all the data irrespective of its labels. User for whom system
+   * auth check to be done.
    * @return true if the given user is having system/super auth
    */
   boolean havingSystemAuth(User user) throws IOException;
@@ -121,12 +121,11 @@ public interface VisibilityLabelService extends Configurable {
    * in Delete mutation and the cell in consideration. Also system passes the serialization format
    * of visibility tags in Put and Delete.<br>
    * Note: This will be concurrently called from multiple threads and implementation should take
-   * care of thread safety. n * The visibility tags present in the Put mutation n * The
-   * serialization format for the Put visibility tags. A <code>null</code> value for this format
-   * means the tags are written with unsorted label ordinals n * - The visibility tags in the delete
-   * mutation (the specified Cell Visibility) n * The serialization format for the Delete visibility
-   * tags. A <code>null</code> value for this format means the tags are written with unsorted label
-   * ordinals
+   * care of thread safety. The visibility tags present in the Put mutation The serialization format
+   * for the Put visibility tags. A <code>null</code> value for this format means the tags are
+   * written with unsorted label ordinals - The visibility tags in the delete mutation (the
+   * specified Cell Visibility) The serialization format for the Delete visibility tags. A
+   * <code>null</code> value for this format means the tags are written with unsorted label ordinals
    * @return true if matching tags are found
    * @see VisibilityConstants#SORTED_ORDINAL_SERIALIZATION_FORMAT
    */
@@ -138,9 +137,9 @@ public interface VisibilityLabelService extends Configurable {
    * are part of the cell created from the WALEdits that are prepared for replication while calling
    * {@link org.apache.hadoop.hbase.replication.ReplicationEndpoint} .replicate().
    * {@link org.apache.hadoop.hbase.security.visibility.VisibilityReplicationEndpoint} calls this
-   * API to provide an opportunity to modify the visibility tags before replicating. n * the
-   * visibility tags associated with the cell n * the serialization format associated with the tag
-   * @return the modified visibility expression in the form of byte[] n
+   * API to provide an opportunity to modify the visibility tags before replicating. the visibility
+   * tags associated with the cell the serialization format associated with the tag
+   * @return the modified visibility expression in the form of byte[]
    */
   byte[] encodeVisibilityForReplication(final List<Tag> visTags, final Byte serializationFormat)
     throws IOException;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelServiceManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelServiceManager.java
index ec009116a6b..490f18a2e5e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelServiceManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelServiceManager.java
@@ -48,9 +48,8 @@ public class VisibilityLabelServiceManager {
   }
 
   /**
-   * n * @return singleton instance of {@link VisibilityLabelService}. The FQCN of the
-   * implementation class can be specified using
-   * "hbase.regionserver.visibility.label.service.class".
+   * @return singleton instance of {@link VisibilityLabelService}. The FQCN of the implementation
+   *         class can be specified using "hbase.regionserver.visibility.label.service.class".
    * @throws IOException When VLS implementation, as specified in conf, can not be loaded.
    */
   public VisibilityLabelService getVisibilityLabelService(Configuration conf) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelsCache.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelsCache.java
index 2060223e69f..ebc1738aad8 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelsCache.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityLabelsCache.java
@@ -94,7 +94,7 @@ public class VisibilityLabelsCache implements VisibilityLabelOrdinalProvider {
   }
 
   /**
-   * @return Singleton instance of VisibilityLabelsCache n * when this is called before calling
+   * @return Singleton instance of VisibilityLabelsCache when this is called before calling
    *         {@link #createAndGet(ZKWatcher, Configuration)}
    */
   @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "MS_EXPOSE_REP",
@@ -249,8 +249,8 @@ public class VisibilityLabelsCache implements VisibilityLabelOrdinalProvider {
   }
 
   /**
-   * Returns the list of ordinals of labels associated with the groups n * @return the list of
-   * ordinals
+   * Returns the list of ordinals of labels associated with the groups
+   * @return the list of ordinals
    */
   public Set<Integer> getGroupAuthsAsOrdinals(String[] groups) {
     this.lock.readLock().lock();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityUtils.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityUtils.java
index 05e9f0f03ec..513e29377cb 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityUtils.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/VisibilityUtils.java
@@ -84,8 +84,8 @@ public class VisibilityUtils {
   private static final ExpressionExpander EXP_EXPANDER = new ExpressionExpander();
 
   /**
-   * Creates the labels data to be written to zookeeper. n * @return Bytes form of labels and their
-   * ordinal details to be written to zookeeper.
+   * Creates the labels data to be written to zookeeper.
+   * @return Bytes form of labels and their ordinal details to be written to zookeeper.
    */
   public static byte[] getDataToWriteToZooKeeper(Map<String, Integer> existingLabels) {
     VisibilityLabelsRequest.Builder visReqBuilder = VisibilityLabelsRequest.newBuilder();
@@ -99,8 +99,8 @@ public class VisibilityUtils {
   }
 
   /**
-   * Creates the user auth data to be written to zookeeper. n * @return Bytes form of user auths
-   * details to be written to zookeeper.
+   * Creates the user auth data to be written to zookeeper.
+   * @return Bytes form of user auths details to be written to zookeeper.
    */
   public static byte[] getUserAuthsDataToWriteToZooKeeper(Map<String, List<Integer>> userAuths) {
     MultiUserAuthorizations.Builder builder = MultiUserAuthorizations.newBuilder();
@@ -117,8 +117,8 @@ public class VisibilityUtils {
 
   /**
    * Reads back from the zookeeper. The data read here is of the form written by
-   * writeToZooKeeper(Map&lt;byte[], Integer&gt; entries). n * @return Labels and their ordinal
-   * details n
+   * writeToZooKeeper(Map&lt;byte[], Integer&gt; entries).
+   * @return Labels and their ordinal details
    */
   public static List<VisibilityLabel> readLabelsFromZKData(byte[] data)
     throws DeserializationException {
@@ -136,7 +136,8 @@ public class VisibilityUtils {
   }
 
   /**
-   * Reads back User auth data written to zookeeper. n * @return User auth details n
+   * Reads back User auth data written to zookeeper.
+   * @return User auth details
    */
   public static MultiUserAuthorizations readUserAuthsFromZKData(byte[] data)
     throws DeserializationException {
@@ -157,8 +158,8 @@ public class VisibilityUtils {
    * @param conf The configuration to use
    * @return Stack of ScanLabelGenerator instances. ScanLabelGenerator classes can be specified in
    *         Configuration as comma separated list using key
-   *         "hbase.regionserver.scan.visibility.label.generator.class" n * when any of the
-   *         specified ScanLabelGenerator class can not be loaded.
+   *         "hbase.regionserver.scan.visibility.label.generator.class" when any of the specified
+   *         ScanLabelGenerator class can not be loaded.
    */
   public static List<ScanLabelGenerator> getScanLabelGenerators(Configuration conf) {
     // There can be n SLG specified as comma separated in conf
@@ -216,8 +217,8 @@ public class VisibilityUtils {
   /**
    * Extracts and partitions the visibility tags and nonVisibility Tags
    * @param cell       - the cell for which we would extract and partition the visibility and non
-   *                   visibility tags n * - all the visibilty tags of type
-   *                   TagType.VISIBILITY_TAG_TYPE would be added to this list
+   *                   visibility tags - all the visibilty tags of type TagType.VISIBILITY_TAG_TYPE
+   *                   would be added to this list
    * @param nonVisTags - all the non visibility tags would be added to this list
    * @return - the serailization format of the tag. Can be null if no tags are found or if there is
    *         no visibility tag found
@@ -361,8 +362,8 @@ public class VisibilityUtils {
 
   /**
    * This will sort the passed labels in ascending oder and then will write one after the other to
-   * the passed stream. n * Unsorted label ordinals n * Stream where to write the labels. n * When
-   * IOE during writes to Stream.
+   * the passed stream. Unsorted label ordinals Stream where to write the labels. When IOE during
+   * writes to Stream.
    */
   private static void writeLabelOrdinalsToStream(List<Integer> labelOrdinals, DataOutputStream dos)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ZKVisibilityLabelWatcher.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ZKVisibilityLabelWatcher.java
index 3150dc448f9..4092036c2f6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ZKVisibilityLabelWatcher.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/security/visibility/ZKVisibilityLabelWatcher.java
@@ -131,8 +131,8 @@ public class ZKVisibilityLabelWatcher extends ZKListener {
   }
 
   /**
-   * Write a labels mirror or user auths mirror into zookeeper n * @param labelsOrUserAuths true for
-   * writing labels and false for user auths.
+   * Write a labels mirror or user auths mirror into zookeeper
+   * @param labelsOrUserAuths true for writing labels and false for user auths.
    */
   public void writeToZookeeper(byte[] data, boolean labelsOrUserAuths) {
     String znode = this.labelZnode;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.java
index fcba6ccfb08..da1bb822998 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.java
@@ -616,7 +616,7 @@ public class RestoreSnapshotHelper {
    * Clone region directory content from the snapshot info. Each region is encoded with the table
    * name, so the cloned region will have a different region name. Instead of copying the hfiles a
    * HFileLink is created.
-   * @param regionDir {@link Path} cloned dir n
+   * @param regionDir {@link Path} cloned dir
    */
   private void cloneRegion(final Path regionDir, final RegionInfo snapshotRegionInfo,
     final SnapshotRegionManifest manifest) throws IOException {
@@ -636,7 +636,7 @@ public class RestoreSnapshotHelper {
    * Clone region directory content from the snapshot info. Each region is encoded with the table
    * name, so the cloned region will have a different region name. Instead of copying the hfiles a
    * HFileLink is created.
-   * @param region {@link HRegion} cloned n
+   * @param region {@link HRegion} cloned
    */
   private void cloneRegion(final HRegion region, final RegionInfo snapshotRegionInfo,
     final SnapshotRegionManifest manifest) throws IOException {
@@ -800,7 +800,7 @@ public class RestoreSnapshotHelper {
   }
 
   /**
-   * Copy the snapshot files for a snapshot scanner, discards meta changes. nnnnnn
+   * Copy the snapshot files for a snapshot scanner, discards meta changes.
    */
   public static RestoreMetaChanges copySnapshotForScanner(Configuration conf, FileSystem fs,
     Path rootDir, Path restoreDir, String snapshotName) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotDescriptionUtils.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotDescriptionUtils.java
index fb54b57ba17..9d49e3113af 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotDescriptionUtils.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/snapshot/SnapshotDescriptionUtils.java
@@ -93,8 +93,7 @@ public final class SnapshotDescriptionUtils {
   public static class CompletedSnaphotDirectoriesFilter extends FSUtils.BlackListDirFilter {
 
     /**
-     * n
-     */
+     *     */
     public CompletedSnaphotDirectoriesFilter(FileSystem fs) {
       super(fs, Collections.singletonList(SNAPSHOT_TMP_DIR_NAME));
     }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomContext.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomContext.java
index f0453b01112..94c58dde4e0 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomContext.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomContext.java
@@ -42,7 +42,7 @@ public abstract class BloomContext {
   }
 
   /**
-   * Bloom information from the cell is retrieved nn
+   * Bloom information from the cell is retrieved
    */
   public void writeBloom(Cell cell) throws IOException {
     // only add to the bloom filter on a new, unique key
@@ -62,7 +62,7 @@ public abstract class BloomContext {
   }
 
   /**
-   * Adds the last bloom key to the HFile Writer as part of StorefileWriter close. nn
+   * Adds the last bloom key to the HFile Writer as part of StorefileWriter close.
    */
   public abstract void addLastBloomKey(HFile.Writer writer) throws IOException;
 
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilter.java
index 9478a99c9b7..e57c302e6b6 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilter.java
@@ -46,8 +46,8 @@ import org.apache.yetus.audience.InterfaceAudience;
  * number of bits in the Bloom filter (bitSize) n denotes the number of elements inserted into the
  * Bloom filter (maxKeys) k represents the number of hash functions used (nbHash) e represents the
  * desired false positive rate for the bloom (err) If we fix the error rate (e) and know the number
- * of entries, then the optimal bloom size m = -(n * ln(err) / (ln(2)^2) ~= n * ln(err) / ln(0.6185)
- * The probability of false positives is minimized when k = m/n ln(2).
+ * of entries, then the optimal bloom size m = -(n * ln(err) / (ln(2)^2) ~= ln(err) / ln(0.6185) The
+ * probability of false positives is minimized when k = m/n ln(2).
  * @see BloomFilter The general behavior of a filter
  * @see <a href="http://portal.acm.org/citation.cfm?id=362692&dl=ACM&coll=portal"> Space/Time
  *      Trade-Offs in Hash Coding with Allowable Errors</a>
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterChunk.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterChunk.java
index e09420cf805..bc0ca049093 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterChunk.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterChunk.java
@@ -92,7 +92,7 @@ public class BloomFilterChunk implements BloomFilterBase {
    * @param hashType   Type of hash function to use
    * @param foldFactor When finished adding entries, you may be able to 'fold' this bloom to save
    *                   space. Tradeoff potentially excess bytes in bloom for ability to fold if
-   *                   keyCount is exponentially greater than maxKeys. n
+   *                   keyCount is exponentially greater than maxKeys.
    */
   // Used only in testcases
   public BloomFilterChunk(int maxKeys, double errorRate, int hashType, int foldFactor)
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterFactory.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterFactory.java
index 5d1fab1fc87..806c615ea57 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterFactory.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterFactory.java
@@ -81,7 +81,7 @@ public final class BloomFilterFactory {
    * data.
    * @param meta   the byte array holding the Bloom filter's metadata, including version information
    * @param reader the {@link HFile} reader to use to lazily load Bloom filter blocks
-   * @return an instance of the correct type of Bloom filter n
+   * @return an instance of the correct type of Bloom filter
    */
   public static BloomFilter createFromMeta(DataInput meta, HFile.Reader reader)
     throws IllegalArgumentException, IOException {
@@ -129,10 +129,10 @@ public final class BloomFilterFactory {
 
   /**
    * Creates a new general (Row or RowCol) Bloom filter at the time of
-   * {@link org.apache.hadoop.hbase.regionserver.HStoreFile} writing. nnn * @param maxKeys an
-   * estimate of the number of keys we expect to insert. Irrelevant if compound Bloom filters are
-   * enabled.
-   * @param writer the HFile writer
+   * {@link org.apache.hadoop.hbase.regionserver.HStoreFile} writing.
+   * @param maxKeys an estimate of the number of keys we expect to insert. Irrelevant if compound
+   *                Bloom filters are enabled.
+   * @param writer  the HFile writer
    * @return the new Bloom filter, or null in case Bloom filters are disabled or when failed to
    *         create one.
    */
@@ -170,10 +170,10 @@ public final class BloomFilterFactory {
 
   /**
    * Creates a new Delete Family Bloom filter at the time of
-   * {@link org.apache.hadoop.hbase.regionserver.HStoreFile} writing. nn * @param maxKeys an
-   * estimate of the number of keys we expect to insert. Irrelevant if compound Bloom filters are
-   * enabled.
-   * @param writer the HFile writer
+   * {@link org.apache.hadoop.hbase.regionserver.HStoreFile} writing.
+   * @param maxKeys an estimate of the number of keys we expect to insert. Irrelevant if compound
+   *                Bloom filters are enabled.
+   * @param writer  the HFile writer
    * @return the new Bloom filter, or null in case Bloom filters are disabled or when failed to
    *         create one.
    */
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterUtil.java
index 7b8a5cd241a..5b24a271474 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/BloomFilterUtil.java
@@ -60,9 +60,9 @@ public final class BloomFilterUtil {
   }
 
   /**
-   * nn * @return the number of bits for a Bloom filter than can hold the given number of keys and
-   * provide the given error rate, assuming that the optimal number of hash functions is used and it
-   * does not have to be an integer.
+   * @return the number of bits for a Bloom filter than can hold the given number of keys and
+   *         provide the given error rate, assuming that the optimal number of hash functions is
+   *         used and it does not have to be an integer.
    */
   public static long computeBitSize(long maxKeys, double errorRate) {
     return (long) Math.ceil(maxKeys * (-Math.log(errorRate) / LOG2_SQUARED));
@@ -85,8 +85,8 @@ public final class BloomFilterUtil {
   /**
    * The maximum number of keys we can put into a Bloom filter of a certain size to maintain the
    * given error rate, assuming the number of hash functions is chosen optimally and does not even
-   * have to be an integer (hence the "ideal" in the function name). nn * @return maximum number of
-   * keys that can be inserted into the Bloom filter
+   * have to be an integer (hence the "ideal" in the function name).
+   * @return maximum number of keys that can be inserted into the Bloom filter
    * @see #computeMaxKeys(long, double, int) for a more precise estimate
    */
   public static long idealMaxKeys(long bitSize, double errorRate) {
@@ -97,9 +97,9 @@ public final class BloomFilterUtil {
 
   /**
    * The maximum number of keys we can put into a Bloom filter of a certain size to get the given
-   * error rate, with the given number of hash functions. nnn * @return the maximum number of keys
-   * that can be inserted in a Bloom filter to maintain the target error rate, if the number of hash
-   * functions is provided.
+   * error rate, with the given number of hash functions.
+   * @return the maximum number of keys that can be inserted in a Bloom filter to maintain the
+   *         target error rate, if the number of hash functions is provided.
    */
   public static long computeMaxKeys(long bitSize, double errorRate, int hashCount) {
     return (long) (-bitSize * 1.0 / hashCount
@@ -110,7 +110,8 @@ public final class BloomFilterUtil {
    * Computes the actual error rate for the given number of elements, number of bits, and number of
    * hash functions. Taken directly from the
    * <a href= "http://en.wikipedia.org/wiki/Bloom_filter#Probability_of_false_positives" > Wikipedia
-   * Bloom filter article</a>. nnn * @return the actual error rate
+   * Bloom filter article</a>.
+   * @return the actual error rate
    */
   public static double actualErrorRate(long maxKeys, long bitSize, int functionCount) {
     return Math
@@ -118,8 +119,8 @@ public final class BloomFilterUtil {
   }
 
   /**
-   * Increases the given byte size of a Bloom filter until it can be folded by the given factor. nn
-   * * @return Foldable byte size
+   * Increases the given byte size of a Bloom filter until it can be folded by the given factor.
+   * @return Foldable byte size
    */
   public static int computeFoldableByteSize(long bitSize, int foldFactor) {
     long byteSizeLong = (bitSize + 7) / 8;
@@ -150,8 +151,8 @@ public final class BloomFilterUtil {
    * @param byteSizeHint the desired number of bytes for the Bloom filter bit array. Will be
    *                     increased so that folding is possible.
    * @param errorRate    target false positive rate of the Bloom filter
-   * @param hashType     Bloom filter hash function type nn * @return the new Bloom filter of the
-   *                     desired size
+   * @param hashType     Bloom filter hash function type
+   * @return the new Bloom filter of the desired size
    */
   public static BloomFilterChunk createBySize(int byteSizeHint, double errorRate, int hashType,
     int foldFactor, BloomType bloomType) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/DirectMemoryUtils.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/DirectMemoryUtils.java
index 15f94ecc46b..c0a9685d13e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/DirectMemoryUtils.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/DirectMemoryUtils.java
@@ -134,8 +134,8 @@ public class DirectMemoryUtils {
    * Every once a while, the JVM checks the reference queue and cleans the DirectByteBuffers.
    * However, as this doesn't happen immediately after discarding all references to a
    * DirectByteBuffer, it's easy to OutOfMemoryError yourself using DirectByteBuffers. This function
-   * explicitly calls the Cleaner method of a DirectByteBuffer. n * The DirectByteBuffer that will
-   * be "cleaned". Utilizes reflection.
+   * explicitly calls the Cleaner method of a DirectByteBuffer. The DirectByteBuffer that will be
+   * "cleaned". Utilizes reflection.
    */
   public static void destroyDirectByteBuffer(ByteBuffer toBeDestroyed)
     throws IllegalArgumentException, IllegalAccessException, InvocationTargetException,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/EncryptionTest.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/EncryptionTest.java
index faacab9cb92..192343ae41d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/EncryptionTest.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/EncryptionTest.java
@@ -45,7 +45,7 @@ public class EncryptionTest {
   }
 
   /**
-   * Check that the configured key provider can be loaded and initialized, or throw an exception. nn
+   * Check that the configured key provider can be loaded and initialized, or throw an exception.
    */
   public static void testKeyProvider(final Configuration conf) throws IOException {
     String providerClassName =
@@ -67,7 +67,6 @@ public class EncryptionTest {
 
   /**
    * Check that the configured cipher provider can be loaded and initialized, or throw an exception.
-   * nn
    */
   public static void testCipherProvider(final Configuration conf) throws IOException {
     String providerClassName =
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSTableDescriptors.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSTableDescriptors.java
index d22cf12ae1c..e38d96effeb 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSTableDescriptors.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSTableDescriptors.java
@@ -455,9 +455,7 @@ public class FSTableDescriptors implements TableDescriptors {
     return Integer.parseInt(m.group(2));
   }
 
-  /**
-   * n * @return Name of tableinfo file.
-   */
+  /** Returns Name of tableinfo file. */
   static String getTableInfoFileName(final int sequenceid) {
     return TABLEINFO_FILE_PREFIX + "." + formatTableInfoSequenceId(sequenceid);
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSUtils.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSUtils.java
index a2d141b4e84..6d8d40ff0b3 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSUtils.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/FSUtils.java
@@ -128,8 +128,8 @@ public final class FSUtils {
    * Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the
    * '/a/b/c' part. If you passed in 'hdfs://a/b/c and b/c, it would return true. Does not consider
    * schema; i.e. if schemas different but path or subpath matches, the two will equate.
-   * @param pathToSearch Path we will be trying to match. n * @return True if <code>pathTail</code>
-   *                     is tail on the path of <code>pathToSearch</code>
+   * @param pathToSearch Path we will be trying to match.
+   * @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code>
    */
   public static boolean isMatchingTail(final Path pathToSearch, final Path pathTail) {
     Path tailPath = pathTail;
@@ -161,7 +161,7 @@ public final class FSUtils {
 
   /**
    * Delete the region directory if exists.
-   * @return True if deleted the region directory. n
+   * @return True if deleted the region directory.
    */
   public static boolean deleteRegionDir(final Configuration conf, final RegionInfo hri)
     throws IOException {
@@ -249,7 +249,8 @@ public final class FSUtils {
   /**
    * We use reflection because
    * {@link DistributedFileSystem#setSafeMode( HdfsConstants.SafeModeAction action, boolean isChecked)}
-   * is not in hadoop 1.1 n * @return whether we're in safe mode n
+   * is not in hadoop 1.1
+   * @return whether we're in safe mode
    */
   private static boolean isInSafeMode(DistributedFileSystem dfs) throws IOException {
     boolean inSafeMode = false;
@@ -269,7 +270,7 @@ public final class FSUtils {
   }
 
   /**
-   * Check whether dfs is in safemode. nn
+   * Check whether dfs is in safemode.
    */
   public static void checkDfsSafeMode(final Configuration conf) throws IOException {
     boolean isInSafeMode = false;
@@ -575,8 +576,7 @@ public final class FSUtils {
   }
 
   /**
-   * nn
-   */
+   *   */
   private static void rewriteAsPb(final FileSystem fs, final Path rootdir, final Path p,
     final ClusterId cid) throws IOException {
     // Rewrite the file as pb. Move aside the old one first, write new
@@ -891,8 +891,8 @@ public final class FSUtils {
   }
 
   /**
-   * nn * @return All the table directories under <code>rootdir</code>. Ignore non table hbase
-   * folders such as .logs, .oldlogs, .corrupt folders. n
+   * @return All the table directories under <code>rootdir</code>. Ignore non table hbase folders
+   *         such as .logs, .oldlogs, .corrupt folders.
    */
   public static List<Path> getLocalTableDirs(final FileSystem fs, final Path rootdir)
     throws IOException {
@@ -938,7 +938,7 @@ public final class FSUtils {
    * .tableinfo
    * @param fs       A file system for the Path
    * @param tableDir Path to a specific table directory &lt;hbase.rootdir&gt;/&lt;tabledir&gt;
-   * @return List of paths to valid region directories in table dir. n
+   * @return List of paths to valid region directories in table dir.
    */
   public static List<Path> getRegionDirs(final FileSystem fs, final Path tableDir)
     throws IOException {
@@ -1003,7 +1003,7 @@ public final class FSUtils {
    * Given a particular region dir, return all the familydirs inside it
    * @param fs        A file system for the Path
    * @param regionDir Path to a specific region directory
-   * @return List of paths to valid family directories in region dir. n
+   * @return List of paths to valid family directories in region dir.
    */
   public static List<Path> getFamilyDirs(final FileSystem fs, final Path regionDir)
     throws IOException {
@@ -1151,7 +1151,7 @@ public final class FSUtils {
    * @param hbaseRootDir The root directory to scan.
    * @param tableName    name of the table to scan.
    * @return Map keyed by StoreFile name with a value of the full Path.
-   * @throws IOException When scanning the directory fails. n
+   * @throws IOException When scanning the directory fails.
    */
   public static Map<String, Path> getTableStoreFilePathMap(Map<String, Path> map,
     final FileSystem fs, final Path hbaseRootDir, TableName tableName)
@@ -1407,7 +1407,7 @@ public final class FSUtils {
    * @param progressReporter Instance or null; gets called every time we move to new region of
    *                         family dir and for each store file.
    * @return Map keyed by StoreFile name with a value of the full Path.
-   * @throws IOException When scanning the directory fails. n
+   * @throws IOException When scanning the directory fails.
    */
   public static Map<String, Path> getTableStoreFilePathMap(final FileSystem fs,
     final Path hbaseRootDir, PathFilter sfFilter, ExecutorService executor,
@@ -1493,10 +1493,10 @@ public final class FSUtils {
   /**
    * This function is to scan the root path of the file system to get the degree of locality for
    * each region on each of the servers having at least one block of that region. This is used by
-   * the tool {@link org.apache.hadoop.hbase.master.RegionPlacementMaintainer} n * the configuration
-   * to use
-   * @return the mapping from region encoded name to a map of server names to locality fraction n *
-   *         in case of file system errors or interrupts
+   * the tool {@link org.apache.hadoop.hbase.master.RegionPlacementMaintainer} the configuration to
+   * use
+   * @return the mapping from region encoded name to a map of server names to locality fraction in
+   *         case of file system errors or interrupts
    */
   public static Map<String, Map<String, Float>>
     getRegionDegreeLocalityMappingFromFS(final Configuration conf) throws IOException {
@@ -1507,11 +1507,10 @@ public final class FSUtils {
 
   /**
    * This function is to scan the root path of the file system to get the degree of locality for
-   * each region on each of the servers having at least one block of that region. n * the
-   * configuration to use n * the table you wish to scan locality for n * the thread pool size to
-   * use
-   * @return the mapping from region encoded name to a map of server names to locality fraction n *
-   *         in case of file system errors or interrupts
+   * each region on each of the servers having at least one block of that region. the configuration
+   * to use the table you wish to scan locality for the thread pool size to use
+   * @return the mapping from region encoded name to a map of server names to locality fraction in
+   *         case of file system errors or interrupts
    */
   public static Map<String, Map<String, Float>> getRegionDegreeLocalityMappingFromFS(
     final Configuration conf, final String desiredTable, int threadPoolSize) throws IOException {
@@ -1524,9 +1523,9 @@ public final class FSUtils {
    * This function is to scan the root path of the file system to get either the mapping between the
    * region name and its best locality region server or the degree of locality of each region on
    * each of the servers having at least one block of that region. The output map parameters are
-   * both optional. n * the configuration to use n * the table you wish to scan locality for n * the
-   * thread pool size to use n * the map into which to put the locality degree mapping or null, must
-   * be a thread-safe implementation n * in case of file system errors or interrupts
+   * both optional. the configuration to use the table you wish to scan locality for the thread pool
+   * size to use the map into which to put the locality degree mapping or null, must be a
+   * thread-safe implementation in case of file system errors or interrupts
    */
   private static void getRegionLocalityMappingFromFS(final Configuration conf,
     final String desiredTable, int threadPoolSize,
@@ -1626,7 +1625,7 @@ public final class FSUtils {
 
   /**
    * Do our short circuit read setup. Checks buffer size to use and whether to do checksumming in
-   * hbase or hdfs. n
+   * hbase or hdfs.
    */
   public static void setupShortCircuitRead(final Configuration conf) {
     // Check that the user has not set the "dfs.client.read.shortcircuit.skip.checksum" property.
@@ -1646,7 +1645,7 @@ public final class FSUtils {
   }
 
   /**
-   * Check if short circuit read buffer size is set and if not, set it to hbase value. n
+   * Check if short circuit read buffer size is set and if not, set it to hbase value.
    */
   public static void checkShortCircuitReadBufferSize(final Configuration conf) {
     final int defaultSize = HConstants.DEFAULT_BLOCKSIZE * 2;
@@ -1662,8 +1661,7 @@ public final class FSUtils {
   }
 
   /**
-   * n * @return The DFSClient DFSHedgedReadMetrics instance or null if can't be found or not on
-   * hdfs. n
+   * Returns The DFSClient DFSHedgedReadMetrics instance or null if can't be found or not on hdfs.
    */
   public static DFSHedgedReadMetrics getDFSHedgedReadMetrics(final Configuration c)
     throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java
index 3121196ecbc..1baed53a98f 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java
@@ -343,8 +343,7 @@ public class HBaseFsck extends Configured implements Closeable {
   }
 
   /**
-   * Constructor n * Configuration object n * if the master is not running n * if unable to connect
-   * to ZooKeeper
+   * Constructor Configuration object if the master is not running if unable to connect to ZooKeeper
    */
   public HBaseFsck(Configuration conf, ExecutorService exec) throws MasterNotRunningException,
     ZooKeeperConnectionException, IOException, ClassNotFoundException {
@@ -1322,8 +1321,8 @@ public class HBaseFsck extends Configured implements Closeable {
   }
 
   /**
-   * To get the column family list according to the column family dirs nn * @return a set of column
-   * families n
+   * To get the column family list according to the column family dirs
+   * @return a set of column families
    */
   private Set<String> getColumnFamilyList(Set<String> columns, HbckRegionInfo hbi)
     throws IOException {
@@ -1343,7 +1342,6 @@ public class HBaseFsck extends Configured implements Closeable {
    * 2. the correct colfamily list<br>
    * 3. the default properties for both {@link TableDescriptor} and
    * {@link ColumnFamilyDescriptor}<br>
-   * n
    */
   private boolean fabricateTableInfo(FSTableDescriptors fstd, TableName tableName,
     Set<String> columns) throws IOException {
@@ -1358,7 +1356,6 @@ public class HBaseFsck extends Configured implements Closeable {
 
   /**
    * To fix the empty REGIONINFO_QUALIFIER rows from hbase:meta <br>
-   * n
    */
   public void fixEmptyMetaCells() throws IOException {
     if (shouldFixEmptyMetaCells() && !emptyRegionInfoQualifiers.isEmpty()) {
@@ -1379,7 +1376,6 @@ public class HBaseFsck extends Configured implements Closeable {
    * &nbsp;2.2 the correct colfamily list<br>
    * &nbsp;2.3 the default properties for both {@link TableDescriptor} and
    * {@link ColumnFamilyDescriptor}<br>
-   * n
    */
   public void fixOrphanTables() throws IOException {
     if (shouldFixTableOrphans() && !orphanTableDirs.isEmpty()) {
@@ -1559,7 +1555,7 @@ public class HBaseFsck extends Configured implements Closeable {
   }
 
   /**
-   * Load the list of disabled tables in ZK into local set. nn
+   * Load the list of disabled tables in ZK into local set.
    */
   private void loadTableStates() throws IOException {
     tableStates = MetaTableAccessor.getTableStates(connection);
@@ -2319,7 +2315,7 @@ public class HBaseFsck extends Configured implements Closeable {
 
   /**
    * Checks tables integrity. Goes over all regions and scans the tables. Collects all the pieces
-   * for each table and checks if there are missing, repeated or overlapping ones. n
+   * for each table and checks if there are missing, repeated or overlapping ones.
    */
   SortedMap<TableName, HbckTableInfo> checkIntegrity() throws IOException {
     tablesInfo = new TreeMap<>();
@@ -2566,7 +2562,7 @@ public class HBaseFsck extends Configured implements Closeable {
    * Check values in regionInfo for hbase:meta Check if zero or more than one regions with
    * hbase:meta are found. If there are inconsistencies (i.e. zero or more than one regions pretend
    * to be holding the hbase:meta) try to fix that and report an error.
-   * @throws IOException from HBaseFsckRepair functions nn
+   * @throws IOException from HBaseFsckRepair functions
    */
   boolean checkMetaRegion() throws IOException, KeeperException, InterruptedException {
     Map<Integer, HbckRegionInfo> metaRegions = new HashMap<>();
@@ -2852,7 +2848,7 @@ public class HBaseFsck extends Configured implements Closeable {
 
     /**
      * Report error information, but do not increment the error count. Intended for cases where the
-     * actual error would have been reported previously. n
+     * actual error would have been reported previously.
      */
     @Override
     public synchronized void report(String message) {
@@ -3512,7 +3508,7 @@ public class HBaseFsck extends Configured implements Closeable {
   }
 
   /**
-   * Main program nn
+   * Main program
    */
   public static void main(String[] args) throws Exception {
     // create a fsck object
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsckRepair.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsckRepair.java
index 1e74997f27c..b7f7d394e9d 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsckRepair.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsckRepair.java
@@ -74,7 +74,7 @@ public class HBaseFsckRepair {
   /**
    * Fix unassigned by creating/transition the unassigned ZK node for this region to OFFLINE state
    * with a special flag to tell the master that this is a forced operation by HBCK. This assumes
-   * that info is in META. nnnn
+   * that info is in META.
    */
   public static void fixUnassigned(Admin admin, RegionInfo region)
     throws IOException, KeeperException, InterruptedException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/JVMClusterUtil.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/JVMClusterUtil.java
index aca0eaffabe..7e0f95a1816 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/JVMClusterUtil.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/JVMClusterUtil.java
@@ -73,7 +73,8 @@ public class JVMClusterUtil {
    * Creates a {@link RegionServerThread}. Call 'start' on the returned thread to make it run.
    * @param c     Configuration to use.
    * @param hrsc  Class to create.
-   * @param index Used distinguishing the object returned. n * @return Region server added.
+   * @param index Used distinguishing the object returned.
+   * @return Region server added.
    */
   public static JVMClusterUtil.RegionServerThread createRegionServerThread(final Configuration c,
     final Class<? extends HRegionServer> hrsc, final int index) throws IOException {
@@ -113,7 +114,8 @@ public class JVMClusterUtil {
    * Creates a {@link MasterThread}. Call 'start' on the returned thread to make it run.
    * @param c     Configuration to use.
    * @param hmc   Class to create.
-   * @param index Used distinguishing the object returned. n * @return Master added.
+   * @param index Used distinguishing the object returned.
+   * @return Master added.
    */
   public static JVMClusterUtil.MasterThread createMasterThread(final Configuration c,
     final Class<? extends HMaster> hmc, final int index) throws IOException {
@@ -148,7 +150,7 @@ public class JVMClusterUtil {
 
   /**
    * Start the cluster. Waits until there is a primary master initialized and returns its address.
-   * nn * @return Address to use contacting primary master.
+   * @return Address to use contacting primary master.
    */
   public static String startup(final List<JVMClusterUtil.MasterThread> masters,
     final List<JVMClusterUtil.RegionServerThread> regionservers) throws IOException {
@@ -229,8 +231,7 @@ public class JVMClusterUtil {
   }
 
   /**
-   * nn
-   */
+   *   */
   public static void shutdown(final List<MasterThread> masters,
     final List<RegionServerThread> regionservers) {
     LOG.debug("Shutting down HBase Cluster");
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ModifyRegionUtils.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ModifyRegionUtils.java
index 35cef31e2a9..7ebcce841b2 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ModifyRegionUtils.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ModifyRegionUtils.java
@@ -88,7 +88,7 @@ public abstract class ModifyRegionUtils {
    * @param rootDir         Root directory for HBase instance
    * @param tableDescriptor description of the table
    * @param newRegions      {@link RegionInfo} that describes the regions to create
-   * @param task            {@link RegionFillTask} custom code to populate region after creation n
+   * @param task            {@link RegionFillTask} custom code to populate region after creation
    */
   public static List<RegionInfo> createRegions(final Configuration conf, final Path rootDir,
     final TableDescriptor tableDescriptor, final RegionInfo[] newRegions, final RegionFillTask task)
@@ -112,7 +112,7 @@ public abstract class ModifyRegionUtils {
    * @param rootDir         Root directory for HBase instance
    * @param tableDescriptor description of the table
    * @param newRegions      {@link RegionInfo} that describes the regions to create
-   * @param task            {@link RegionFillTask} custom code to populate region after creation n
+   * @param task            {@link RegionFillTask} custom code to populate region after creation
    */
   public static List<RegionInfo> createRegions(final ThreadPoolExecutor exec,
     final Configuration conf, final Path rootDir, final TableDescriptor tableDescriptor,
@@ -149,7 +149,7 @@ public abstract class ModifyRegionUtils {
    * @param rootDir         Root directory for HBase instance
    * @param tableDescriptor description of the table
    * @param newRegion       {@link RegionInfo} that describes the region to create
-   * @param task            {@link RegionFillTask} custom code to populate region after creation n
+   * @param task            {@link RegionFillTask} custom code to populate region after creation
    */
   public static RegionInfo createRegion(final Configuration conf, final Path rootDir,
     final TableDescriptor tableDescriptor, final RegionInfo newRegion, final RegionFillTask task)
@@ -176,7 +176,7 @@ public abstract class ModifyRegionUtils {
    * Execute the task on the specified set of regions.
    * @param exec    Thread Pool Executor
    * @param regions {@link RegionInfo} that describes the regions to edit
-   * @param task    {@link RegionFillTask} custom code to edit the region n
+   * @param task    {@link RegionFillTask} custom code to edit the region
    */
   public static void editRegions(final ThreadPoolExecutor exec,
     final Collection<RegionInfo> regions, final RegionEditTask task) throws IOException {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/MunkresAssignment.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/MunkresAssignment.java
index f3e731f5333..00655f42a75 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/MunkresAssignment.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/MunkresAssignment.java
@@ -87,7 +87,7 @@ public class MunkresAssignment {
    * Construct a new problem instance with the specified cost matrix. The cost matrix must be
    * rectangular, though not necessarily square. If one dimension is greater than the other, some
    * elements in the greater dimension will not be assigned. The input cost matrix will not be
-   * modified. n
+   * modified.
    */
   public MunkresAssignment(float[][] costMatrix) {
     // The algorithm assumes that the number of columns is at least as great as
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionMover.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionMover.java
index 697fbc1826d..065eea06d85 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionMover.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionMover.java
@@ -184,8 +184,8 @@ public class RegionMover extends AbstractHBaseTool implements Closeable {
     }
 
     /**
-     * Path of file where regions will be written to during unloading/read from during loading n
-     * * @return RegionMoverBuilder object
+     * Path of file where regions will be written to during unloading/read from during loading
+     * @return RegionMoverBuilder object
      */
     public RegionMoverBuilder filename(String filename) {
       this.filename = filename;
@@ -230,7 +230,7 @@ public class RegionMover extends AbstractHBaseTool implements Closeable {
      * effort mode,each region movement is tried once.This can be used during graceful shutdown as
      * even if we have a stuck region,upon shutdown it'll be reassigned anyway.
      * <p>
-     * n * @return RegionMoverBuilder object
+     * @return RegionMoverBuilder object
      */
     public RegionMoverBuilder ack(boolean ack) {
       this.ack = ack;
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
index 67117b260e8..4113f003fea 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitCalculator.java
@@ -55,7 +55,7 @@ public class RegionSplitCalculator<R extends KeyRange> {
   private final TreeSet<byte[]> splits = new TreeSet<>(BYTES_COMPARATOR);
 
   /**
-   * This is a map from start key to regions with the same start key. Invariant: This always have n
+   * This is a map from start key to regions with the same start key. Invariant: This always have *
    * values in total
    */
   private final Multimap<byte[], R> starts = ArrayListMultimap.create();
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java
index 563fcf37ec2..a9fbf885e66 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RegionSplitter.java
@@ -146,15 +146,14 @@ public class RegionSplitter {
    */
   public interface SplitAlgorithm {
     /**
-     * Split a pre-existing region into 2 regions. n * first row (inclusive) n * last row
-     * (exclusive)
+     * Split a pre-existing region into 2 regions. first row (inclusive) last row (exclusive)
      * @return the split row to use
      */
     byte[] split(byte[] start, byte[] end);
 
     /**
-     * Split an entire table. n * number of regions to split the table into n * user input is
-     * validated at this time. may throw a runtime exception in response to a parse failure
+     * Split an entire table. number of regions to split the table into user input is validated at
+     * this time. may throw a runtime exception in response to a parse failure
      * @return array of split keys for the initial regions of the table. The length of the returned
      *         array should be numRegions-1.
      */
@@ -188,7 +187,7 @@ public class RegionSplitter {
 
     /**
      * In HBase, the last row is represented by an empty byte array. Set this value to help the
-     * split code understand how to evenly divide the first region. n * raw user input (may throw
+     * split code understand how to evenly divide the first region. raw user input (may throw
      * RuntimeException on parse failure)
      */
     void setFirstRow(String userInput);
@@ -196,19 +195,19 @@ public class RegionSplitter {
     /**
      * In HBase, the last row is represented by an empty byte array. Set this value to help the
      * split code understand how to evenly divide the last region. Note that this last row is
-     * inclusive for all rows sharing the same prefix. n * raw user input (may throw
-     * RuntimeException on parse failure)
+     * inclusive for all rows sharing the same prefix. raw user input (may throw RuntimeException on
+     * parse failure)
      */
     void setLastRow(String userInput);
 
     /**
-     * n * user or file input for row
+     * user or file input for row
      * @return byte array representation of this row for HBase
      */
     byte[] strToRow(String input);
 
     /**
-     * n * byte array representing a row in HBase
+     * byte array representing a row in HBase
      * @return String to use for debug &amp; file printing
      */
     String rowToStr(byte[] row);
@@ -252,10 +251,9 @@ public class RegionSplitter {
    * </ul>
    * There are three SplitAlgorithms built into RegionSplitter, HexStringSplit, DecimalStringSplit,
    * and UniformSplit. These are different strategies for choosing region boundaries. See their
-   * source code for details. n * Usage: RegionSplitter &lt;TABLE&gt; &lt;SPLITALGORITHM&gt; &lt;-c
+   * source code for details. Usage: RegionSplitter &lt;TABLE&gt; &lt;SPLITALGORITHM&gt; &lt;-c
    * &lt;# regions&gt; -f &lt;family:family:...&gt; | -r [-o &lt;# outstanding splits&gt;]&gt; [-D
-   * &lt;conf.param=value&gt;] n * HBase IO problem n * user requested exit n * problem parsing user
-   * input
+   * &lt;conf.param=value&gt;] HBase IO problem user requested exit problem parsing user input
    */
   @SuppressWarnings("static-access")
   public static void main(String[] args) throws IOException, InterruptedException, ParseException {
@@ -376,8 +374,8 @@ public class RegionSplitter {
   }
 
   /**
-   * Alternative getCurrentNrHRS which is no longer available. n * @return Rough count of
-   * regionservers out on cluster.
+   * Alternative getCurrentNrHRS which is no longer available.
+   * @return Rough count of regionservers out on cluster.
    * @throws IOException if a remote or network exception occurs
    */
   private static int getRegionServerCount(final Connection connection) throws IOException {
@@ -714,7 +712,7 @@ public class RegionSplitter {
   }
 
   /**
-   * nn * @return A Pair where first item is table dir and second is the split file.
+   * @return A Pair where first item is table dir and second is the split file.
    * @throws IOException if a remote or network exception occurs
    */
   private static Pair<Path, Path> getTableDirAndSplitFile(final Configuration conf,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RollingStatCalculator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RollingStatCalculator.java
index 4eedfe083e1..f63208cd489 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RollingStatCalculator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/RollingStatCalculator.java
@@ -41,7 +41,7 @@ public class RollingStatCalculator {
   private long[] dataValues;
 
   /**
-   * Creates a RollingStatCalculator with given number of rolling periods. n
+   * Creates a RollingStatCalculator with given number of rolling periods.
    */
   public RollingStatCalculator(int rollingPeriod) {
     this.rollingPeriod = rollingPeriod;
@@ -53,7 +53,7 @@ public class RollingStatCalculator {
   }
 
   /**
-   * Inserts given data value to array of data values to be considered for statistics calculation n
+   * Inserts given data value to array of data values to be considered for statistics calculation
    */
   public void insertDataValue(long data) {
     // if current number of data points already equals rolling period and rolling period is
@@ -71,7 +71,7 @@ public class RollingStatCalculator {
   }
 
   /**
-   * Update the statistics after removing the given data value n
+   * Update the statistics after removing the given data value
    */
   private void removeData(long data) {
     currentSum = currentSum - (double) data;
@@ -91,9 +91,7 @@ public class RollingStatCalculator {
     return Math.sqrt(variance);
   }
 
-  /**
-   * n * @return an array of given size initialized with zeros
-   */
+  /** Returns an array of given size initialized with zeros */
   private long[] fillWithZeros(int size) {
     long[] zeros = new long[size];
     for (int i = 0; i < size; i++) {
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ZKDataMigrator.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ZKDataMigrator.java
index 173c202e2d3..5f4ddb3821e 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ZKDataMigrator.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/ZKDataMigrator.java
@@ -92,7 +92,8 @@ public class ZKDataMigrator {
    * @param tableName table we're checking
    * @return Null or
    *         {@link org.apache.hadoop.hbase.shaded.protobuf.generated.ZooKeeperProtos.DeprecatedTableState.State}
-   *         found in znode. n * @deprecated Since 2.0.0. To be removed in hbase-3.0.0.
+   *         found in znode.
+   * @deprecated Since 2.0.0. To be removed in hbase-3.0.0.
    */
   @Deprecated
   private static ZooKeeperProtos.DeprecatedTableState.State getTableState(final ZKWatcher zkw,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/hbck/HFileCorruptionChecker.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/hbck/HFileCorruptionChecker.java
index 479a2425c4b..9796669d5db 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/util/hbck/HFileCorruptionChecker.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/util/hbck/HFileCorruptionChecker.java
@@ -86,8 +86,8 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Checks a path to see if it is a valid hfile. n * full Path to an HFile n * This is a
-   * connectivity related exception
+   * Checks a path to see if it is a valid hfile. full Path to an HFile This is a connectivity
+   * related exception
    */
   protected void checkHFile(Path p) throws IOException {
     HFile.Reader r = null;
@@ -121,7 +121,7 @@ public class HFileCorruptionChecker {
 
   /**
    * Given a path, generates a new path to where we move a corrupted hfile (bad trailer, no
-   * trailer). n * Path to a corrupt hfile (assumes that it is HBASE_DIR/ table /region/cf/file)
+   * trailer). Path to a corrupt hfile (assumes that it is HBASE_DIR/ table /region/cf/file)
    * @return path to where corrupted files are stored. This should be
    *         HBASE_DIR/.corrupt/table/region/cf/file.
    */
@@ -144,7 +144,7 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Check all files in a column family dir. n * column family directory n
+   * Check all files in a column family dir. column family directory
    */
   protected void checkColFamDir(Path cfDir) throws IOException {
     FileStatus[] statuses = null;
@@ -176,7 +176,7 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Check all files in a mob column family dir. n * mob column family directory n
+   * Check all files in a mob column family dir. mob column family directory
    */
   protected void checkMobColFamDir(Path cfDir) throws IOException {
     FileStatus[] statuses = null;
@@ -208,8 +208,8 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Checks a path to see if it is a valid mob file. n * full Path to a mob file. n * This is a
-   * connectivity related exception
+   * Checks a path to see if it is a valid mob file. full Path to a mob file. This is a connectivity
+   * related exception
    */
   protected void checkMobFile(Path p) throws IOException {
     HFile.Reader r = null;
@@ -243,7 +243,7 @@ public class HFileCorruptionChecker {
 
   /**
    * Checks all the mob files of a table.
-   * @param regionDir The mob region directory n
+   * @param regionDir The mob region directory
    */
   private void checkMobRegionDir(Path regionDir) throws IOException {
     if (!fs.exists(regionDir)) {
@@ -277,7 +277,7 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Check all column families in a region dir. n * region directory n
+   * Check all column families in a region dir. region directory
    */
   protected void checkRegionDir(Path regionDir) throws IOException {
     FileStatus[] statuses = null;
@@ -309,7 +309,7 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Check all the regiondirs in the specified tableDir n * path to a table n
+   * Check all the regiondirs in the specified tableDir path to a table
    */
   void checkTableDir(Path tableDir) throws IOException {
     List<FileStatus> rds =
@@ -488,7 +488,7 @@ public class HFileCorruptionChecker {
   }
 
   /**
-   * Print a human readable summary of hfile quarantining operations. n
+   * Print a human readable summary of hfile quarantining operations.
    */
   public void report(HbckErrorReporter out) {
     out.print("Checked " + hfilesChecked.get() + " hfile for corruption");
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WAL.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WAL.java
index 3828b17a9fb..5212242b9ff 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WAL.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WAL.java
@@ -69,8 +69,8 @@ public interface WAL extends Closeable, WALFileLengthProvider {
    * Roll the log writer. That is, start writing log messages to a new file.
    * <p/>
    * The implementation is synchronized in order to make sure there's one rollWriter running at any
-   * given time. n * If true, force creation of a new writer even if no entries have been written to
-   * the current writer
+   * given time. If true, force creation of a new writer even if no entries have been written to the
+   * current writer
    * @return If lots of logs, flush the stores of returned regions so next time through we can clean
    *         logs. Returns null if nothing to flush. Names are actual region names as returned by
    *         {@link RegionInfo#getEncodedName()}
@@ -267,21 +267,21 @@ public interface WAL extends Closeable, WALFileLengthProvider {
     }
 
     /**
-     * Gets the edit n
+     * Gets the edit
      */
     public WALEdit getEdit() {
       return edit;
     }
 
     /**
-     * Gets the key n
+     * Gets the key
      */
     public WALKeyImpl getKey() {
       return key;
     }
 
     /**
-     * Set compression context for this entry. n * Compression context
+     * Set compression context for this entry. Compression context
      * @deprecated deparcated since hbase 2.1.0
      */
     @Deprecated
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKeyImpl.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKeyImpl.java
index 91b5c211720..aff98431e56 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKeyImpl.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALKeyImpl.java
@@ -241,9 +241,9 @@ public class WALKeyImpl implements WALKey {
    *                          <code>HRegionInfo#getEncodedNameAsBytes()</code>.
    * @param tablename         the tablename
    * @param now               Time at which this edit was written.
-   * @param clusterIds        the clusters that have consumed the change(used in Replication) nn
-   *                          * @param mvcc mvcc control used to generate sequence numbers and
-   *                          control read/write points
+   * @param clusterIds        the clusters that have consumed the change(used in Replication)
+   * @param mvcc              mvcc control used to generate sequence numbers and control read/write
+   *                          points
    */
   public WALKeyImpl(final byte[] encodedRegionName, final TableName tablename, final long now,
     List<UUID> clusterIds, long nonceGroup, final long nonce,
@@ -256,8 +256,8 @@ public class WALKeyImpl implements WALKey {
    * Create the log key for writing to somewhere. We maintain the tablename mainly for debugging
    * purposes. A regionName is always a sub-table object.
    * @param encodedRegionName Encoded name of the region as returned by
-   *                          <code>HRegionInfo#getEncodedNameAsBytes()</code>. n * @param now Time
-   *                          at which this edit was written.
+   *                          <code>HRegionInfo#getEncodedNameAsBytes()</code>.
+   * @param now               Time at which this edit was written.
    * @param clusterIds        the clusters that have consumed the change(used in Replication)
    * @param nonceGroup        the nonceGroup
    * @param nonce             the nonce
@@ -276,7 +276,7 @@ public class WALKeyImpl implements WALKey {
    * Create the log key for writing to somewhere. We maintain the tablename mainly for debugging
    * purposes. A regionName is always a sub-table object.
    * @param encodedRegionName Encoded name of the region as returned by
-   *                          <code>HRegionInfo#getEncodedNameAsBytes()</code>. nnnn
+   *                          <code>HRegionInfo#getEncodedNameAsBytes()</code>.
    */
   // TODO: Fix being able to pass in sequenceid.
   public WALKeyImpl(final byte[] encodedRegionName, final TableName tablename, long logSeqNum,
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALPrettyPrinter.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALPrettyPrinter.java
index ef52c278c4c..964efaacd45 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALPrettyPrinter.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALPrettyPrinter.java
@@ -104,16 +104,23 @@ public class WALPrettyPrinter {
   }
 
   /**
-   * Fully specified constructor. n * when true, enables output of values along with other log
-   * information n * when true, enables output in JSON format rather than a "pretty string" n * when
-   * nonnegative, serves as a filter; only log entries with this sequence id will be printed n *
-   * when non null, serves as a filter. only entries corresponding to tables in the tableSet are
-   * printed n * when not null, serves as a filter; only log entries from this region will be
-   * printed n * when not null, serves as a filter; only log entries from this row will be printed n
-   * * when not null, serves as a filter; only log entries with row key having this prefix will be
-   * printed n * keeps a single list running for multiple files. if enabled, the
-   * endPersistentOutput() method must be used! n * Specifies an alternative to stdout for the
-   * destination of this PrettyPrinter's output.
+   * Fully specified constructor.
+   * @param outputValues     when true, enables output of values along with other log information
+   * @param outputJSON       when true, enables output in JSON format rather than a "pretty string"
+   * @param sequence         when nonnegative, serves as a filter; only log entries with this
+   *                         sequence id will be printed
+   * @param tableSet         when non null, serves as a filter. only entries corresponding to tables
+   *                         in the tableSet are printed
+   * @param region           when not null, serves as a filter; only log entries from this region
+   *                         will be printed
+   * @param row              when not null, serves as a filter; only log entries from this row will
+   *                         be printed
+   * @param rowPrefix        when not null, serves as a filter; only log entries with row key having
+   *                         this prefix will be printed
+   * @param persistentOutput keeps a single list running for multiple files. if enabled, the
+   *                         endPersistentOutput() method must be used!
+   * @param out              Specifies an alternative to stdout for the destination of this
+   *                         PrettyPrinter's output.
    */
   public WALPrettyPrinter(boolean outputValues, boolean outputJSON, long sequence,
     Set<String> tableSet, String region, String row, String rowPrefix, boolean outputOnlyRowKey,
@@ -163,8 +170,8 @@ public class WALPrettyPrinter {
   }
 
   /**
-   * sets the region by which output will be filtered n * when nonnegative, serves as a filter; only
-   * log entries with this sequence id will be printed
+   * sets the region by which output will be filtered when nonnegative, serves as a filter; only log
+   * entries with this sequence id will be printed
    */
   public void setSequenceFilter(long sequence) {
     this.sequence = sequence;
@@ -179,23 +186,23 @@ public class WALPrettyPrinter {
   }
 
   /**
-   * sets the region by which output will be filtered n * when not null, serves as a filter; only
-   * log entries from this region will be printed
+   * sets the region by which output will be filtered when not null, serves as a filter; only log
+   * entries from this region will be printed
    */
   public void setRegionFilter(String region) {
     this.region = region;
   }
 
   /**
-   * sets the row key by which output will be filtered n * when not null, serves as a filter; only
-   * log entries from this row will be printed
+   * sets the row key by which output will be filtered when not null, serves as a filter; only log
+   * entries from this row will be printed
    */
   public void setRowFilter(String row) {
     this.row = row;
   }
 
   /**
-   * sets the rowPrefix key prefix by which output will be filtered n * when not null, serves as a
+   * sets the rowPrefix key prefix by which output will be filtered when not null, serves as a
    * filter; only log entries with rows having this prefix will be printed
    */
   public void setRowPrefixFilter(String rowPrefix) {
@@ -210,8 +217,8 @@ public class WALPrettyPrinter {
   }
 
   /**
-   * sets the position to start seeking the WAL file n * initial position to start seeking the given
-   * WAL file
+   * sets the position to start seeking the WAL file initial position to start seeking the given WAL
+   * file
    */
   public void setPosition(long position) {
     this.position = position;
@@ -247,9 +254,8 @@ public class WALPrettyPrinter {
 
   /**
    * reads a log file and outputs its contents, one transaction at a time, as specified by the
-   * currently configured options n * the HBase configuration relevant to this log file n * the path
-   * of the log file to be read n * may be unable to access the configured filesystem or requested
-   * file.
+   * currently configured options the HBase configuration relevant to this log file the path of the
+   * log file to be read may be unable to access the configured filesystem or requested file.
    */
   public void processFile(final Configuration conf, final Path p) throws IOException {
     FileSystem fs = p.getFileSystem(conf);
@@ -428,8 +434,7 @@ public class WALPrettyPrinter {
 
   /**
    * Pass one or more log file names and formatting options and it will dump out a text version of
-   * the contents on <code>stdout</code>. n * Command line arguments n * Thrown upon file system
-   * errors etc.
+   * the contents on <code>stdout</code>. Command line arguments Thrown upon file system errors etc.
    */
   public static void run(String[] args) throws IOException {
     // create options
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseCluster.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseCluster.java
index 469c5aa68e8..8417e2a2904 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseCluster.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseCluster.java
@@ -390,7 +390,7 @@ public abstract class HBaseCluster implements Closeable, Configurable {
   public abstract void close() throws IOException;
 
   /**
-   * Wait for the namenode. n
+   * Wait for the namenode.
    */
   public void waitForNamenodeAvailable() throws InterruptedException {
   }
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java
index 6f186d2126a..98441defdf6 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestCase.java
@@ -88,8 +88,7 @@ public abstract class HBaseTestCase extends TestCase {
   }
 
   /**
-   * n
-   */
+   *   */
   public HBaseTestCase(String name) {
     super(name);
   }
@@ -136,7 +135,8 @@ public abstract class HBaseTestCase extends TestCase {
   }
 
   /**
-   * @see HBaseTestingUtility#getBaseTestDir n * @return directory to use for this test
+   * @see HBaseTestingUtility#getBaseTestDir
+   * @return directory to use for this test
    */
   protected Path getUnitTestdir(String testName) {
     return testUtil.getDataTestDir(testName);
@@ -145,7 +145,7 @@ public abstract class HBaseTestCase extends TestCase {
   /**
    * You must call close on the returned region and then close on the log file it created. Do
    * {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)} to close both the region and the WAL.
-   * nnn * @return An {@link HRegion} n
+   * @return An {@link HRegion}
    */
   public HRegion createNewHRegion(HTableDescriptor desc, byte[] startKey, byte[] endKey)
     throws IOException {
@@ -201,7 +201,8 @@ public abstract class HBaseTestCase extends TestCase {
 
   /**
    * Add content to region <code>r</code> on the passed column <code>column</code>. Adds data of the
-   * from 'aaa', 'aab', etc where key and value are the same. nnnn * @return count of what we added.
+   * from 'aaa', 'aab', etc where key and value are the same.
+   * @return count of what we added.
    */
   public static long addContent(final Region r, final byte[] columnFamily, final byte[] column)
     throws IOException {
@@ -221,7 +222,8 @@ public abstract class HBaseTestCase extends TestCase {
 
   /**
    * Add content to region <code>r</code> on the passed column <code>column</code>. Adds data of the
-   * from 'aaa', 'aab', etc where key and value are the same. n * @return count of what we added.
+   * from 'aaa', 'aab', etc where key and value are the same.
+   * @return count of what we added.
    */
   public static long addContent(final Table updater, final String columnFamily) throws IOException {
     return addContent(updater, columnFamily, START_KEY_BYTES, null);
@@ -235,7 +237,7 @@ public abstract class HBaseTestCase extends TestCase {
   /**
    * Add content to region <code>r</code> on the passed column <code>column</code>. Adds data of the
    * from 'aaa', 'aab', etc where key and value are the same.
-   * @return count of what we added. n
+   * @return count of what we added.
    */
   public static long addContent(final Table updater, final String columnFamily,
     final byte[] startKeyBytes, final byte[] endKey) throws IOException {
@@ -250,7 +252,7 @@ public abstract class HBaseTestCase extends TestCase {
   /**
    * Add content to region <code>r</code> on the passed column <code>column</code>. Adds data of the
    * from 'aaa', 'aab', etc where key and value are the same.
-   * @return count of what we added. n
+   * @return count of what we added.
    */
   public static long addContent(final Table updater, final String columnFamily, final String column,
     final byte[] startKeyBytes, final byte[] endKey, final long ts) throws IOException {
@@ -349,7 +351,7 @@ public abstract class HBaseTestCase extends TestCase {
   }
 
   /**
-   * Common method to close down a MiniDFSCluster and the associated file system n
+   * Common method to close down a MiniDFSCluster and the associated file system
    */
   public static void shutdownDfs(MiniDFSCluster cluster) {
     if (cluster != null) {
@@ -376,7 +378,6 @@ public abstract class HBaseTestCase extends TestCase {
 
   /**
    * You must call {@link #closeRootAndMeta()} when done after calling this method. It does cleanup.
-   * n
    */
   protected void createMetaRegion() throws IOException {
     FSTableDescriptors fsTableDescriptors = new FSTableDescriptors(conf);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
index d535d1077cd..cd6573017a2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java
@@ -554,7 +554,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
 
   /**
    * Cleans the test data directory on the test filesystem.
-   * @return True if we removed the test dirs n
+   * @return True if we removed the test dirs
    */
   public boolean cleanupDataTestDirOnTestFS() throws IOException {
     boolean ret = getTestFileSystem().delete(dataTestDirOnTestFS, true);
@@ -564,7 +564,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
 
   /**
    * Cleans a subdirectory under the test data directory on the test filesystem.
-   * @return True if we removed child n
+   * @return True if we removed child
    */
   public boolean cleanupDataTestDirOnTestFS(String subdirName) throws IOException {
     Path cpath = getDataTestDirOnTestFS(subdirName);
@@ -573,7 +573,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
 
   /**
    * Start a minidfscluster.
-   * @param servers How many DNs to start. n * @see #shutdownMiniDFSCluster()
+   * @param servers How many DNs to start.
+   * @see #shutdownMiniDFSCluster()
    * @return The mini dfs cluster created.
    */
   public MiniDFSCluster startMiniDFSCluster(int servers) throws Exception {
@@ -584,7 +585,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Start a minidfscluster. This is useful if you want to run datanode on distinct hosts for things
    * like HDFS block location verification. If you start MiniDFSCluster without host names, all
    * instances of the datanodes will have the same host name.
-   * @param hosts hostnames DNs to run on. n * @see #shutdownMiniDFSCluster()
+   * @param hosts hostnames DNs to run on.
+   * @see #shutdownMiniDFSCluster()
    * @return The mini dfs cluster created.
    */
   public MiniDFSCluster startMiniDFSCluster(final String hosts[]) throws Exception {
@@ -598,7 +600,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Start a minidfscluster. Can only create one.
    * @param servers How many DNs to start.
-   * @param hosts   hostnames DNs to run on. n * @see #shutdownMiniDFSCluster()
+   * @param hosts   hostnames DNs to run on.
+   * @see #shutdownMiniDFSCluster()
    * @return The mini dfs cluster created.
    */
   public MiniDFSCluster startMiniDFSCluster(int servers, final String hosts[]) throws Exception {
@@ -770,7 +773,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Shuts down instance created by call to {@link #startMiniDFSCluster(int)} or does nothing. n
+   * Shuts down instance created by call to {@link #startMiniDFSCluster(int)} or does nothing.
    */
   public void shutdownMiniDFSCluster() throws IOException {
     if (this.dfsCluster != null) {
@@ -1335,7 +1338,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Returns the path to the default root dir the minicluster uses. If <code>create</code> is true,
    * a new root directory path is fetched irrespective of whether it has been fetched before or not.
    * If false, previous path is used. Note: this does not cause the root dir to be created.
-   * @return Fully qualified path for the default hbase root dir n
+   * @return Fully qualified path for the default hbase root dir
    */
   public Path getDefaultRootDirPath(boolean create) throws IOException {
     if (!create) {
@@ -1348,7 +1351,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Same as {{@link HBaseTestingUtility#getDefaultRootDirPath(boolean create)} except that
    * <code>create</code> flag is false. Note: this does not cause the root dir to be created.
-   * @return Fully qualified path for the default hbase root dir n
+   * @return Fully qualified path for the default hbase root dir
    */
   public Path getDefaultRootDirPath() throws IOException {
     return getDefaultRootDirPath(false);
@@ -1361,7 +1364,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param create This flag decides whether to get a new root or data directory path or not, if it
    *               has been fetched already. Note : Directory will be made irrespective of whether
    *               path has been fetched or not. If directory already exists, it will be overwritten
-   * @return Fully qualified path to hbase root dir n
+   * @return Fully qualified path to hbase root dir
    */
   public Path createRootDir(boolean create) throws IOException {
     FileSystem fs = FileSystem.get(this.conf);
@@ -1375,7 +1378,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Same as {@link HBaseTestingUtility#createRootDir(boolean create)} except that
    * <code>create</code> flag is false.
-   * @return Fully qualified path to hbase root dir n
+   * @return Fully qualified path to hbase root dir
    */
   public Path createRootDir() throws IOException {
     return createRootDir(false);
@@ -1385,7 +1388,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Creates a hbase walDir in the user's home directory. Normally you won't make use of this
    * method. Root hbaseWALDir is created for you as part of mini cluster startup. You'd only use
    * this method if you were doing manual operation.
-   * @return Fully qualified path to hbase root dir n
+   * @return Fully qualified path to hbase root dir
    */
   public Path createWALRootDir() throws IOException {
     FileSystem fs = FileSystem.get(this.conf);
@@ -1434,14 +1437,16 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, String family) throws IOException {
     return createTable(tableName, new String[] { family });
   }
 
   /**
-   * Create a table. nn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, String[] families) throws IOException {
     List<byte[]> fams = new ArrayList<>(families.length);
@@ -1452,14 +1457,16 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[] family) throws IOException {
     return createTable(tableName, new byte[][] { family });
   }
 
   /**
-   * Create a table with multiple regions. nnn * @return A Table instance for the created table. n
+   * Create a table with multiple regions.
+   * @return A Table instance for the created table.
    */
   public Table createMultiRegionTable(TableName tableName, byte[] family, int numRegions)
     throws IOException {
@@ -1472,22 +1479,25 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families) throws IOException {
     return createTable(tableName, families, (byte[][]) null);
   }
 
   /**
-   * Create a table with multiple regions. nn * @return A Table instance for the created table. n
+   * Create a table with multiple regions.
+   * @return A Table instance for the created table.
    */
   public Table createMultiRegionTable(TableName tableName, byte[][] families) throws IOException {
     return createTable(tableName, families, KEYS_FOR_HBA_CREATE_TABLE);
   }
 
   /**
-   * Create a table with multiple regions. n * @param replicaCount replica count. n * @return A
-   * Table instance for the created table. n
+   * Create a table with multiple regions.
+   * @param replicaCount replica count.
+   * @return A Table instance for the created table.
    */
   public Table createMultiRegionTable(TableName tableName, int replicaCount, byte[][] families)
     throws IOException {
@@ -1495,7 +1505,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families, byte[][] splitKeys)
     throws IOException {
@@ -1529,8 +1540,9 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nn * @param c Configuration to use
-   * @return A Table instance for the created table. n
+   * Create a table.
+   * @param c Configuration to use
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableDescriptor htd, byte[][] families, Configuration c)
     throws IOException {
@@ -1589,7 +1601,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Create a table.
    * @param htd       table descriptor
    * @param splitRows array of split keys
-   * @return A Table instance for the created table. n
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableDescriptor htd, byte[][] splitRows) throws IOException {
     TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(htd);
@@ -1613,7 +1625,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param splitKeys    the split keys
    * @param replicaCount the replica count
    * @param c            Configuration to use
-   * @return A Table instance for the created table. n
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families, byte[][] splitKeys,
     int replicaCount, final Configuration c) throws IOException {
@@ -1623,14 +1635,16 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[] family, int numVersions) throws IOException {
     return createTable(tableName, new byte[][] { family }, numVersions);
   }
 
   /**
-   * Create a table. nnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families, int numVersions)
     throws IOException {
@@ -1638,7 +1652,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nnnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families, int numVersions,
     byte[][] splitKeys) throws IOException {
@@ -1658,7 +1673,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table with multiple regions. nnn * @return A Table instance for the created table. n
+   * Create a table with multiple regions.
+   * @return A Table instance for the created table.
    */
   public Table createMultiRegionTable(TableName tableName, byte[][] families, int numVersions)
     throws IOException {
@@ -1666,7 +1682,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nnnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families, int numVersions, int blockSize)
     throws IOException {
@@ -1708,7 +1725,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[][] families, int[] numVersions)
     throws IOException {
@@ -1730,7 +1748,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table. nnn * @return A Table instance for the created table. n
+   * Create a table.
+   * @return A Table instance for the created table.
    */
   public Table createTable(TableName tableName, byte[] family, byte[][] splitRows)
     throws IOException {
@@ -1748,7 +1767,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create a table with multiple regions. nn * @return A Table instance for the created table. n
+   * Create a table with multiple regions.
+   * @return A Table instance for the created table.
    */
   public Table createMultiRegionTable(TableName tableName, byte[] family) throws IOException {
     return createTable(tableName, family, KEYS_FOR_HBA_CREATE_TABLE);
@@ -1909,7 +1929,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param desc     a table descriptor indicating which table the region belongs to
    * @param startKey the start boundary of the region
    * @param endKey   the end boundary of the region
-   * @return a region that writes to local dir for testing n
+   * @return a region that writes to local dir for testing
    */
   public HRegion createLocalHRegion(TableDescriptor desc, byte[] startKey, byte[] endKey)
     throws IOException {
@@ -1931,7 +1951,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param conf configuration
    * @param desc table descriptor
    * @param wal  wal for this region.
-   * @return created hregion n
+   * @return created hregion
    */
   public HRegion createLocalHRegion(RegionInfo info, Configuration conf, TableDescriptor desc,
     WAL wal) throws IOException {
@@ -1944,7 +1964,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param info configuration
    * @param desc table descriptor
    * @param wal  wal for this region.
-   * @return created hregion n
+   * @return created hregion
    */
   public HRegion createLocalHRegion(HRegionInfo info, Configuration conf, HTableDescriptor desc,
     WAL wal) throws IOException {
@@ -1976,8 +1996,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * nnnnn * @return A region on which you must call
-   * {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)} when done. n
+   * Return a region on which you must call {@link HBaseTestingUtility#closeRegionAndWAL(HRegion)}
+   * when done.
    */
   public HRegion createLocalHRegion(TableName tableName, byte[] startKey, byte[] stopKey,
     Configuration conf, boolean isReadOnly, Durability durability, WAL wal, byte[]... families)
@@ -2017,7 +2037,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Provide an existing table name to truncate. Scans the table and issues a delete for each row
    * read.
    * @param tableName existing table
-   * @return HTable to that new table n
+   * @return HTable to that new table
    */
   public Table deleteTableData(TableName tableName) throws IOException {
     Table table = getConnection().getTable(tableName);
@@ -2064,7 +2084,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Load table with rows from 'aaa' to 'zzz'.
    * @param t Table
    * @param f Family
-   * @return Count of rows loaded. n
+   * @return Count of rows loaded.
    */
   public int loadTable(final Table t, final byte[] f) throws IOException {
     return loadTable(t, new byte[][] { f });
@@ -2074,7 +2094,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Load table with rows from 'aaa' to 'zzz'.
    * @param t Table
    * @param f Family
-   * @return Count of rows loaded. n
+   * @return Count of rows loaded.
    */
   public int loadTable(final Table t, final byte[] f, boolean writeToWAL) throws IOException {
     return loadTable(t, new byte[][] { f }, null, writeToWAL);
@@ -2084,7 +2104,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Load table of multiple column families with rows from 'aaa' to 'zzz'.
    * @param t Table
    * @param f Array of Families to load
-   * @return Count of rows loaded. n
+   * @return Count of rows loaded.
    */
   public int loadTable(final Table t, final byte[][] f) throws IOException {
     return loadTable(t, f, null);
@@ -2095,7 +2115,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param t     Table
    * @param f     Array of Families to load
    * @param value the values of the cells. If null is passed, the row key is used as value
-   * @return Count of rows loaded. n
+   * @return Count of rows loaded.
    */
   public int loadTable(final Table t, final byte[][] f, byte[] value) throws IOException {
     return loadTable(t, f, value, true);
@@ -2106,7 +2126,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param t     Table
    * @param f     Array of Families to load
    * @param value the values of the cells. If null is passed, the row key is used as value
-   * @return Count of rows loaded. n
+   * @return Count of rows loaded.
    */
   public int loadTable(final Table t, final byte[][] f, byte[] value, boolean writeToWAL)
     throws IOException {
@@ -2193,7 +2213,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * @param r     Region
    * @param f     Family
    * @param flush flush the cache if true
-   * @return Count of rows loaded. n
+   * @return Count of rows loaded.
    */
   public int loadRegion(final HRegion r, final byte[] f, final boolean flush) throws IOException {
     byte[] k = new byte[3];
@@ -2427,9 +2447,9 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Create rows in hbase:meta for regions of the specified table with the specified start keys. The
    * first startKey should be a 0 length byte array if you want to form a proper range of regions.
-   * nnn * @return list of region info for regions added to meta n * @deprecated since 2.0 version
-   * and will be removed in 3.0 version. use
-   * {@link #createMultiRegionsInMeta(Configuration, TableDescriptor, byte[][])}
+   * @return list of region info for regions added to meta
+   * @deprecated since 2.0 version and will be removed in 3.0 version. use
+   *             {@link #createMultiRegionsInMeta(Configuration, TableDescriptor, byte[][])}
    */
   @Deprecated
   public List<HRegionInfo> createMultiRegionsInMeta(final Configuration conf,
@@ -2441,7 +2461,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Create rows in hbase:meta for regions of the specified table with the specified start keys. The
    * first startKey should be a 0 length byte array if you want to form a proper range of regions.
-   * nnn * @return list of region info for regions added to meta n
+   * @return list of region info for regions added to meta
    */
   public List<RegionInfo> createMultiRegionsInMeta(final Configuration conf,
     final TableDescriptor htd, byte[][] startKeys) throws IOException {
@@ -2578,9 +2598,9 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
     }
   }
 
-  /*
-   * Find any other region server which is different from the one identified by parameter n
-   * * @return another region server
+  /**
+   * Find any other region server which is different from the one identified by parameter
+   * @return another region server
    */
   public HRegionServer getOtherRegionServer(HRegionServer rs) {
     for (JVMClusterUtil.RegionServerThread rst : getMiniHBaseCluster().getRegionServerThreads()) {
@@ -2595,7 +2615,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Tool to get the reference to the region server object that holds the region of the specified
    * user table.
    * @param tableName user table to lookup in hbase:meta
-   * @return region server that holds it, null if the row doesn't exist nn
+   * @return region server that holds it, null if the row doesn't exist
    */
   public HRegionServer getRSForFirstRegionInTable(TableName tableName)
     throws IOException, InterruptedException {
@@ -2789,7 +2809,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Expire the Master's session n
+   * Expire the Master's session
    */
   public void expireMasterSession() throws Exception {
     HMaster master = getMiniHBaseCluster().getMaster();
@@ -2923,7 +2943,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
 
   /**
    * Get a shared Connection to the cluster. this method is threadsafe.
-   * @return A Connection that can be shared. Don't close. Will be closed on shutdown of cluster. n
+   * @return A Connection that can be shared. Don't close. Will be closed on shutdown of cluster.
    */
   public Connection getConnection() throws IOException {
     try {
@@ -3017,7 +3037,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Closes the region containing the given row.
    * @param row   The row to find the containing region.
-   * @param table The table to find the region. n
+   * @param table The table to find the region.
    */
   public void unassignRegionByRow(byte[] row, RegionLocator table) throws IOException {
     HRegionLocation hrl = table.getRegionLocation(row);
@@ -3094,7 +3114,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Wait until all regions in a table have been assigned. Waits default timeout before giving up
    * (30 seconds).
-   * @param table Table to wait on. nn
+   * @param table Table to wait on.
    */
   public void waitTableAvailable(TableName table) throws InterruptedException, IOException {
     waitTableAvailable(table.getName(), 30000);
@@ -3108,7 +3128,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Wait until all regions in a table have been assigned
    * @param table         Table to wait on.
-   * @param timeoutMillis Timeout. nn
+   * @param timeoutMillis Timeout.
    */
   public void waitTableAvailable(byte[] table, long timeoutMillis)
     throws InterruptedException, IOException {
@@ -3186,7 +3206,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * have been all assigned.
    * @see #waitTableEnabled(TableName, long)
    * @param table         Table to wait on.
-   * @param timeoutMillis Time to wait on it being marked enabled. nn
+   * @param timeoutMillis Time to wait on it being marked enabled.
    */
   public void waitTableEnabled(byte[] table, long timeoutMillis)
     throws InterruptedException, IOException {
@@ -3200,7 +3220,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Waits for a table to be 'disabled'. Disabled means that table is set as 'disabled' Will timeout
    * after default period (30 seconds)
-   * @param table Table to wait on. nn
+   * @param table Table to wait on.
    */
   public void waitTableDisabled(byte[] table) throws InterruptedException, IOException {
     waitTableDisabled(table, 30000);
@@ -3214,7 +3234,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Waits for a table to be 'disabled'. Disabled means that table is set as 'disabled'
    * @param table         Table to wait on.
-   * @param timeoutMillis Time to wait on it being marked disabled. nn
+   * @param timeoutMillis Time to wait on it being marked disabled.
    */
   public void waitTableDisabled(byte[] table, long timeoutMillis)
     throws InterruptedException, IOException {
@@ -3224,7 +3244,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Make sure that at least the specified number of region servers are running
    * @param num minimum number of region servers that should be running
-   * @return true if we started some servers n
+   * @return true if we started some servers
    */
   public boolean ensureSomeRegionServersAvailable(final int num) throws IOException {
     boolean startedServer = false;
@@ -3241,7 +3261,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Make sure that at least the specified number of region servers are running. We don't count the
    * ones that are currently stopping or are stopped.
    * @param num minimum number of region servers that should be running
-   * @return true if we started some servers n
+   * @return true if we started some servers
    */
   public boolean ensureSomeNonStoppedRegionServersAvailable(final int num) throws IOException {
     boolean startedServer = ensureSomeRegionServersAvailable(num);
@@ -3268,7 +3288,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Use it getting new instances of FileSystem. Only works for DistributedFileSystem w/o Kerberos.
    * @param c                     Initial configuration
    * @param differentiatingSuffix Suffix to differentiate this user from others.
-   * @return A new configuration instance with a different user set into it. n
+   * @return A new configuration instance with a different user set into it.
    */
   public static User getDifferentUser(final Configuration c, final String differentiatingSuffix)
     throws IOException {
@@ -3321,7 +3341,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * failed 4 times.  Pipeline was 127.0.0.1:53687, 127.0.0.1:53683. Will retry...
    * </pre>
    *
-   * @param stream A DFSClient.DFSOutputStream. nnnnn
+   * @param stream A DFSClient.DFSOutputStream.
    */
   public static void setMaxRecoveryErrorCount(final OutputStream stream, final int max) {
     try {
@@ -3358,7 +3378,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   /**
    * Move region to destination server and wait till region is completely moved and online
    * @param destRegion region to move
-   * @param destServer destination server of the region nn
+   * @param destServer destination server of the region
    */
   public void moveRegionAndWait(RegionInfo destRegion, ServerName destServer)
     throws InterruptedException, IOException {
@@ -3380,7 +3400,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * Wait until all regions for a table in hbase:meta have a non-empty info:server, up to a
    * configuable timeout value (default is 60 seconds) This means all regions have been deployed,
    * master has been informed and updated hbase:meta with the regions deployed server.
-   * @param tableName the table name n
+   * @param tableName the table name
    */
   public void waitUntilAllRegionsAssigned(final TableName tableName) throws IOException {
     waitUntilAllRegionsAssigned(tableName,
@@ -3388,7 +3408,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Waith until all system table's regions get assigned n
+   * Waith until all system table's regions get assigned
    */
   public void waitUntilAllSystemRegionsAssigned() throws IOException {
     waitUntilAllRegionsAssigned(TableName.META_TABLE_NAME);
@@ -3400,7 +3420,7 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
    * timeout. This means all regions have been deployed, master has been informed and updated
    * hbase:meta with the regions deployed server.
    * @param tableName the table name
-   * @param timeout   timeout, in milliseconds n
+   * @param timeout   timeout, in milliseconds
    */
   public void waitUntilAllRegionsAssigned(final TableName tableName, final long timeout)
     throws IOException {
@@ -3509,8 +3529,8 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
   }
 
   /**
-   * Create region split keys between startkey and endKey nn * @param numRegions the number of
-   * regions to be created. it has to be greater than 3.
+   * Create region split keys between startkey and endKey
+   * @param numRegions the number of regions to be created. it has to be greater than 3.
    * @return resulting split keys
    */
   public byte[][] getRegionSplitStartKeys(byte[] startKey, byte[] endKey, int numRegions) {
@@ -3981,21 +4001,21 @@ public class HBaseTestingUtility extends HBaseZKTestingUtility {
 
   /**
    * Wait until no regions in transition.
-   * @param timeout How long to wait. n
+   * @param timeout How long to wait.
    */
   public void waitUntilNoRegionsInTransition(final long timeout) throws IOException {
     waitFor(timeout, predicateNoRegionsInTransition());
   }
 
   /**
-   * Wait until no regions in transition. (time limit 15min) n
+   * Wait until no regions in transition. (time limit 15min)
    */
   public void waitUntilNoRegionsInTransition() throws IOException {
     waitUntilNoRegionsInTransition(15 * 60000);
   }
 
   /**
-   * Wait until labels is ready in VisibilityLabelsCache. nn
+   * Wait until labels is ready in VisibilityLabelsCache.
    */
   public void waitLabelAvailable(long timeoutMillis, final String... labels) {
     final VisibilityLabelsCache labelsCache = VisibilityLabelsCache.get();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/HFilePerformanceEvaluation.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/HFilePerformanceEvaluation.java
index 92547bf0216..a1e3d11c43b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/HFilePerformanceEvaluation.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/HFilePerformanceEvaluation.java
@@ -97,7 +97,7 @@ public class HFilePerformanceEvaluation {
 
   /**
    * Add any supported codec or cipher to test the HFile read/write performance. Specify "none" to
-   * disable codec or cipher or both. n
+   * disable codec or cipher or both.
    */
   private void runBenchmarks() throws Exception {
     final Configuration conf = new Configuration();
@@ -163,9 +163,9 @@ public class HFilePerformanceEvaluation {
   }
 
   /**
-   * Write a test HFile with the given codec & cipher nnn * @param codec "none", "lzo", "gz",
-   * "snappy"
-   * @param cipher "none", "aes" n
+   * Write a test HFile with the given codec & cipher
+   * @param codec  "none", "lzo", "gz", "snappy"
+   * @param cipher "none", "aes"
    */
   private void runWriteBenchmark(Configuration conf, FileSystem fs, Path mf, String codec,
     String cipher) throws Exception {
@@ -179,7 +179,8 @@ public class HFilePerformanceEvaluation {
   }
 
   /**
-   * Run all the read benchmarks for the test HFile nnn * @param codec "none", "lzo", "gz", "snappy"
+   * Run all the read benchmarks for the test HFile
+   * @param codec  "none", "lzo", "gz", "snappy"
    * @param cipher "none", "aes"
    */
   private void runReadBenchmark(final Configuration conf, final FileSystem fs, final Path mf,
@@ -296,7 +297,7 @@ public class HFilePerformanceEvaluation {
 
     /**
      * Run benchmark
-     * @return elapsed time. n
+     * @return elapsed time.
      */
     long run() throws Exception {
       long elapsedTime;
@@ -513,8 +514,7 @@ public class HFilePerformanceEvaluation {
   }
 
   /**
-   * nnn
-   */
+   *   */
   public static void main(String[] args) throws Exception {
     new HFilePerformanceEvaluation().runBenchmarks();
   }
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/MetaMockingUtil.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/MetaMockingUtil.java
index 9b61855cb4b..285a8dc732e 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/MetaMockingUtil.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/MetaMockingUtil.java
@@ -34,7 +34,7 @@ public class MetaMockingUtil {
    * Returns a Result object constructed from the given region information simulating a catalog
    * table result.
    * @param region the HRegionInfo object or null
-   * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table. n
+   * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table.
    */
   public static Result getMetaTableRowResult(final HRegionInfo region) throws IOException {
     return getMetaTableRowResult(region, null, null, null);
@@ -45,7 +45,7 @@ public class MetaMockingUtil {
    * table result.
    * @param region the HRegionInfo object or null
    * @param sn     to use making startcode and server hostname:port in meta or null
-   * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table. n
+   * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table.
    */
   public static Result getMetaTableRowResult(final HRegionInfo region, final ServerName sn)
     throws IOException {
@@ -59,7 +59,7 @@ public class MetaMockingUtil {
    * @param sn     to use making startcode and server hostname:port in meta or null
    * @param splita daughter region or null
    * @param splitb daughter region or null
-   * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table. n
+   * @return A mocked up Result that fakes a Get on a row in the <code>hbase:meta</code> table.
    */
   public static Result getMetaTableRowResult(RegionInfo region, final ServerName sn,
     RegionInfo splita, RegionInfo splitb) throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
index 78a3dac8a9c..5a3c3c39d52 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/MiniHBaseCluster.java
@@ -60,7 +60,7 @@ public class MiniHBaseCluster extends HBaseCluster {
   /**
    * Start a MiniHBaseCluster.
    * @param conf             Configuration to be used for cluster
-   * @param numRegionServers initial number of region servers to start. n
+   * @param numRegionServers initial number of region servers to start.
    */
   public MiniHBaseCluster(Configuration conf, int numRegionServers)
     throws IOException, InterruptedException {
@@ -71,7 +71,7 @@ public class MiniHBaseCluster extends HBaseCluster {
    * Start a MiniHBaseCluster.
    * @param conf             Configuration to be used for cluster
    * @param numMasters       initial number of masters to start.
-   * @param numRegionServers initial number of region servers to start. n
+   * @param numRegionServers initial number of region servers to start.
    */
   public MiniHBaseCluster(Configuration conf, int numMasters, int numRegionServers)
     throws IOException, InterruptedException {
@@ -95,7 +95,7 @@ public class MiniHBaseCluster extends HBaseCluster {
    * @param rsPorts Ports that RegionServer should use; pass ports if you want to test cluster
    *                restart where for sure the regionservers come up on same address+port (but just
    *                with different startcode); by default mini hbase clusters choose new arbitrary
-   *                ports on each cluster start. nn
+   *                ports on each cluster start.
    */
   public MiniHBaseCluster(Configuration conf, int numMasters, int numAlwaysStandByMasters,
     int numRegionServers, List<Integer> rsPorts, Class<? extends HMaster> masterClass,
@@ -137,9 +137,9 @@ public class MiniHBaseCluster extends HBaseCluster {
     }
 
     /*
-     * n * @param currentfs We return this if we did not make a new one.
+     * @param currentfs We return this if we did not make a new one.
      * @param uniqueName Same name used to help identify the created fs.
-     * @return A new fs instance if we are up on DistributeFileSystem. n
+     * @return A new fs instance if we are up on DistributeFileSystem.
      */
 
     @Override
@@ -398,7 +398,8 @@ public class MiniHBaseCluster extends HBaseCluster {
   }
 
   /**
-   * Starts a region server thread running n * @return New RegionServerThread
+   * Starts a region server thread running
+   * @return New RegionServerThread
    */
   public JVMClusterUtil.RegionServerThread startRegionServer() throws IOException {
     final Configuration newConf = HBaseConfiguration.create(conf);
@@ -486,7 +487,7 @@ public class MiniHBaseCluster extends HBaseCluster {
 
   /**
    * Suspend the specified region server
-   * @param serverNumber Used as index into a list. n
+   * @param serverNumber Used as index into a list.
    */
   public JVMClusterUtil.RegionServerThread suspendRegionServer(int serverNumber) {
     JVMClusterUtil.RegionServerThread server = hbaseCluster.getRegionServers().get(serverNumber);
@@ -497,7 +498,7 @@ public class MiniHBaseCluster extends HBaseCluster {
 
   /**
    * Resume the specified region server
-   * @param serverNumber Used as index into a list. n
+   * @param serverNumber Used as index into a list.
    */
   public JVMClusterUtil.RegionServerThread resumeRegionServer(int serverNumber) {
     JVMClusterUtil.RegionServerThread server = hbaseCluster.getRegionServers().get(serverNumber);
@@ -508,7 +509,7 @@ public class MiniHBaseCluster extends HBaseCluster {
 
   /**
    * Wait for the specified region server to stop. Removes this thread from list of running threads.
-   * n * @return Name of region server that just went down.
+   * @return Name of region server that just went down.
    */
   public String waitOnRegionServer(final int serverNumber) {
     return this.hbaseCluster.waitOnRegionServer(serverNumber);
@@ -608,8 +609,8 @@ public class MiniHBaseCluster extends HBaseCluster {
   }
 
   /**
-   * Wait for the specified master to stop. Removes this thread from list of running threads. n
-   * * @return Name of master that just went down.
+   * Wait for the specified master to stop. Removes this thread from list of running threads.
+   * @return Name of master that just went down.
    */
   public String waitOnMaster(final int serverNumber) {
     return this.hbaseCluster.waitOnMaster(serverNumber);
@@ -617,7 +618,7 @@ public class MiniHBaseCluster extends HBaseCluster {
 
   /**
    * Blocks until there is an active master and that master has completed initialization.
-   * @return true if an active master becomes available. false if there are no masters left. n
+   * @return true if an active master becomes available. false if there are no masters left.
    */
   @Override
   public boolean waitForActiveAndReadyMaster(long timeout) throws IOException {
@@ -723,7 +724,7 @@ public class MiniHBaseCluster extends HBaseCluster {
   }
 
   /**
-   * Call flushCache on all regions on all participating regionservers. n
+   * Call flushCache on all regions on all participating regionservers.
    */
   public void compact(boolean major) throws IOException {
     for (JVMClusterUtil.RegionServerThread t : this.hbaseCluster.getRegionServers()) {
@@ -736,7 +737,7 @@ public class MiniHBaseCluster extends HBaseCluster {
   }
 
   /**
-   * Call flushCache on all regions of the specified table. n
+   * Call flushCache on all regions of the specified table.
    */
   public void compact(TableName tableName, boolean major) throws IOException {
     for (JVMClusterUtil.RegionServerThread t : this.hbaseCluster.getRegionServers()) {
@@ -769,7 +770,8 @@ public class MiniHBaseCluster extends HBaseCluster {
   }
 
   /**
-   * Grab a numbered region server of your choice. n * @return region server
+   * Grab a numbered region server of your choice.
+   * @return region server
    */
   public HRegionServer getRegionServer(int serverNumber) {
     return hbaseCluster.getRegionServer(serverNumber);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
index 88317cffc9f..4748762cba1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestGlobalMemStoreSize.java
@@ -69,7 +69,7 @@ public class TestGlobalMemStoreSize {
 
   /**
    * Test the global mem store size in the region server is equal to sum of each region's mem store
-   * size n
+   * size
    */
   @Test
   public void testGlobalMemStore() throws Exception {
@@ -148,7 +148,7 @@ public class TestGlobalMemStoreSize {
   }
 
   /**
-   * Flush and log stats on flush nnn
+   * Flush and log stats on flush
    */
   private void flush(final HRegion r, final HRegionServer server) throws IOException {
     LOG.info("Flush " + r.toString() + " on " + server.getServerName() + ", " + r.flush(true)
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestHColumnDescriptorDefaultVersions.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestHColumnDescriptorDefaultVersions.java
index 4e1431d35ea..118a7d6973a 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestHColumnDescriptorDefaultVersions.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestHColumnDescriptorDefaultVersions.java
@@ -57,7 +57,7 @@ public class TestHColumnDescriptorDefaultVersions {
   private static final byte[] FAMILY = Bytes.toBytes("cf0");
 
   /**
-   * Start up a mini cluster and put a small table of empty regions into it. n
+   * Start up a mini cluster and put a small table of empty regions into it.
    */
   @BeforeClass
   public static void beforeAllTests() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestMultiVersions.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestMultiVersions.java
index 43d8534167c..e1c06843e7d 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestMultiVersions.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestMultiVersions.java
@@ -192,7 +192,7 @@ public class TestMultiVersions {
    * Port of old TestScanMultipleVersions test here so can better utilize the spun up cluster
    * running more than just a single test. Keep old tests crazyness.
    * <p>
-   * Tests five cases of scans and timestamps. n
+   * Tests five cases of scans and timestamps.
    */
   @Test
   public void testScanMultipleVersions() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
index a9e33a9fd42..629a9d5950c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
@@ -138,7 +138,7 @@ public class TestPartialResultsFromClientSide {
 
   /**
    * Ensure that the expected key values appear in a result returned from a scanner that is
-   * combining partial results into complete results n
+   * combining partial results into complete results
    */
   @Test
   public void testExpectedValuesOfPartialResults() throws Exception {
@@ -172,7 +172,7 @@ public class TestPartialResultsFromClientSide {
   }
 
   /**
-   * Ensure that we only see Results marked as partial when the allowPartial flag is set n
+   * Ensure that we only see Results marked as partial when the allowPartial flag is set
    */
   @Test
   public void testAllowPartialResults() throws Exception {
@@ -204,7 +204,7 @@ public class TestPartialResultsFromClientSide {
   /**
    * Ensure that the results returned from a scanner that retrieves all results in a single RPC call
    * matches the results that are returned from a scanner that must incrementally combine partial
-   * results into complete results. A variety of scan configurations can be tested n
+   * results into complete results. A variety of scan configurations can be tested
    */
   @Test
   public void testEquivalenceOfScanResults() throws Exception {
@@ -241,7 +241,7 @@ public class TestPartialResultsFromClientSide {
   }
 
   /**
-   * Order of cells in partial results matches the ordering of cells from complete results n
+   * Order of cells in partial results matches the ordering of cells from complete results
    */
   @Test
   public void testOrderingOfCellsInPartialResults() throws Exception {
@@ -313,7 +313,7 @@ public class TestPartialResultsFromClientSide {
 
   /**
    * Setting the max result size allows us to control how many cells we expect to see on each call
-   * to next on the scanner. Test a variety of different sizes for correctness n
+   * to next on the scanner. Test a variety of different sizes for correctness
    */
   @Test
   public void testExpectedNumberOfCellsPerPartialResult() throws Exception {
@@ -365,7 +365,7 @@ public class TestPartialResultsFromClientSide {
   /**
    * @return The approximate heap size of a cell in the test table. All cells should have
    *         approximately the same heap size, so the value is cached to avoid repeating the
-   *         calculation n
+   *         calculation
    */
   private long getCellHeapSize() throws Exception {
     if (CELL_HEAP_SIZE == -1) {
@@ -393,8 +393,8 @@ public class TestPartialResultsFromClientSide {
   }
 
   /**
-   * n * @return the result size that should be used in {@link Scan#setMaxResultSize(long)} if you
-   * want the server to return exactly numberOfCells cells n
+   * @return the result size that should be used in {@link Scan#setMaxResultSize(long)} if you want
+   *         the server to return exactly numberOfCells cells
    */
   private long getResultSizeForNumberOfCells(int numberOfCells) throws Exception {
     return getCellHeapSize() * numberOfCells;
@@ -442,7 +442,7 @@ public class TestPartialResultsFromClientSide {
   }
 
   /**
-   * Test the method {@link Result#createCompleteResult(Iterable)} n
+   * Test the method {@link Result#createCompleteResult(Iterable)}
    */
   @Test
   public void testPartialResultsReassembly() throws Exception {
@@ -543,7 +543,7 @@ public class TestPartialResultsFromClientSide {
    * Examine the interaction between the maxResultSize and caching. If the caching limit is reached
    * before the maxResultSize limit, we should not see partial results. On the other hand, if the
    * maxResultSize limit is reached before the caching limit, it is likely that partial results will
-   * be seen. n
+   * be seen.
    */
   @Test
   public void testPartialResultsAndCaching() throws Exception {
@@ -556,7 +556,7 @@ public class TestPartialResultsFromClientSide {
 
   /**
    * @param resultSizeRowLimit The row limit that will be enforced through maxResultSize
-   * @param cachingRowLimit    The row limit that will be enforced through caching n
+   * @param cachingRowLimit    The row limit that will be enforced through caching
    */
   public void testPartialResultsAndCaching(int resultSizeRowLimit, int cachingRowLimit)
     throws Exception {
@@ -636,7 +636,7 @@ public class TestPartialResultsFromClientSide {
   }
 
   /**
-   * Verifies that result contains all the key values within expKvList. Fails the test otherwise nnn
+   * Verifies that result contains all the key values within expKvList. Fails the test otherwise
    */
   static void verifyResult(Result result, List<Cell> expKvList, String msg) {
     if (LOG.isInfoEnabled()) {
@@ -662,7 +662,7 @@ public class TestPartialResultsFromClientSide {
   }
 
   /**
-   * Compares two results and fails the test if the results are different nnn
+   * Compares two results and fails the test if the results are different
    */
   static void compareResults(Result r1, Result r2, final String message) {
     if (LOG.isInfoEnabled()) {
@@ -771,7 +771,7 @@ public class TestPartialResultsFromClientSide {
    * Test partial Result re-assembly in the presence of different filters. The Results from the
    * partial scanner should match the Results returned from a scanner that receives all of the
    * results in one RPC to the server. The partial scanner is tested with a variety of different
-   * result sizes (all of which are less than the size necessary to fetch an entire row) n
+   * result sizes (all of which are less than the size necessary to fetch an entire row)
    */
   @Test
   public void testPartialResultsWithColumnFilter() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java
index 9b18eaadfad..ccd6b3d327e 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestRegionRebalancing.java
@@ -99,7 +99,7 @@ public class TestRegionRebalancing {
 
   /**
    * For HBASE-71. Try a few different configurations of starting and stopping region servers to see
-   * if the assignment or regions is pretty balanced. nn
+   * if the assignment or regions is pretty balanced.
    */
   @Test
   public void testRebalanceOnRegionServerNumberChange() throws IOException, InterruptedException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestSerialization.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestSerialization.java
index d6598afaf8b..6615e648806 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TestSerialization.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TestSerialization.java
@@ -142,7 +142,7 @@ public class TestSerialization {
   }
 
   /**
-   * Test RegionInfo serialization n
+   * Test RegionInfo serialization
    */
   @Test
   public void testRegionInfo() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/TimestampTestBase.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/TimestampTestBase.java
index 6086ec73044..ecbc54c127a 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/TimestampTestBase.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/TimestampTestBase.java
@@ -50,7 +50,7 @@ public class TimestampTestBase {
 
   /*
    * Run test that delete works according to description in <a
-   * href="https://issues.apache.org/jira/browse/HADOOP-1784">hadoop-1784</a>. nnn
+   * href="https://issues.apache.org/jira/browse/HADOOP-1784">hadoop-1784</a>.
    */
   public static void doTestDelete(final Table table, FlushCache flusher) throws IOException {
     // Add values at various timestamps (Values are timestampes as bytes).
@@ -112,7 +112,7 @@ public class TimestampTestBase {
   /*
    * Assert that returned versions match passed in timestamps and that results are returned in the
    * right order. Assert that values when converted to longs match the corresponding passed
-   * timestamp. nnn
+   * timestamp.
    */
   public static void assertVersions(final Table incommon, final long[] tss) throws IOException {
     // Assert that 'latest' is what we expect.
@@ -158,7 +158,7 @@ public class TimestampTestBase {
   }
 
   /*
-   * Run test scanning different timestamps. nnn
+   * Run test scanning different timestamps.
    */
   public static void doTestTimestampScanning(final Table incommon, final FlushCache flusher)
     throws IOException {
@@ -178,7 +178,8 @@ public class TimestampTestBase {
   }
 
   /*
-   * Assert that the scan returns only values < timestamp. nn * @return Count of items scanned. n
+   * Assert that the scan returns only values < timestamp.
+   * @return Count of items scanned.
    */
   public static int assertScanContentTimestamp(final Table in, final long ts) throws IOException {
     Scan scan = new Scan(HConstants.EMPTY_START_ROW);
@@ -217,7 +218,7 @@ public class TimestampTestBase {
   }
 
   /*
-   * Put values. nnnn
+   * Put values.
    */
   public static void put(final Table loader, final byte[] bytes, final long ts) throws IOException {
     Put put = new Put(ROW, ts);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/backup/TestHFileArchiving.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/backup/TestHFileArchiving.java
index a106141581b..21e7e52bf35 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/backup/TestHFileArchiving.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/backup/TestHFileArchiving.java
@@ -346,7 +346,7 @@ public class TestHFileArchiving {
 
   /**
    * Test that the region directory is removed when we archive a region without store files, but
-   * still has hidden files. n
+   * still has hidden files.
    */
   @Test
   public void testDeleteRegionWithNoStoreFiles() throws Exception {
@@ -565,7 +565,7 @@ public class TestHFileArchiving {
   }
 
   /**
-   * Test that the store files are archived when a column family is removed. n
+   * Test that the store files are archived when a column family is removed.
    */
   @Test
   public void testArchiveOnTableFamilyDelete() throws Exception {
@@ -731,7 +731,7 @@ public class TestHFileArchiving {
    * Get the names of all the files below the given directory
    * @param fs         the file system to inspect
    * @param archiveDir the directory in which to look
-   * @return a list of all files in the directory and sub-directories n
+   * @return a list of all files in the directory and sub-directories
    */
   private List<String> getAllFileNames(final FileSystem fs, Path archiveDir) throws IOException {
     FileStatus[] files = CommonFSUtils.listStatus(fs, archiveDir, new PathFilter() {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/FromClientSideBase.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/FromClientSideBase.java
index 908c6e7baff..5b71ffba893 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/FromClientSideBase.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/FromClientSideBase.java
@@ -210,14 +210,14 @@ class FromClientSideBase {
   }
 
   /*
-   * n * @return Scan with RowFilter that does LESS than passed key.
+   * @return Scan with RowFilter that does LESS than passed key.
    */
   protected Scan createScanWithRowFilter(final byte[] key) {
     return createScanWithRowFilter(key, null, CompareOperator.LESS);
   }
 
   /*
-   * nnn * @return Scan with RowFilter that does CompareOp op on passed key.
+   * @return Scan with RowFilter that does CompareOp op on passed key.
    */
   protected Scan createScanWithRowFilter(final byte[] key, final byte[] startRow,
     CompareOperator op) {
@@ -250,8 +250,8 @@ class FromClientSideBase {
 
   /*
    * Wait on table split. May return because we waited long enough on the split and it didn't
-   * happen. Caller should check. n * @return Map of table regions; caller needs to check table
-   * actually split.
+   * happen. Caller should check.
+   * @return Map of table regions; caller needs to check table actually split.
    */
   private List<HRegionLocation> waitOnSplit(final Table t) throws IOException {
     try (RegionLocator locator = TEST_UTIL.getConnection().getRegionLocator(t.getName())) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/HConnectionTestingUtility.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/HConnectionTestingUtility.java
index aa780fc39d4..f9571ea40e3 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/HConnectionTestingUtility.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/HConnectionTestingUtility.java
@@ -58,7 +58,7 @@ public class HConnectionTestingUtility {
    * around; this is probably not what you want. >>>>>>> fabf2b8282... HBASE-22572 Javadoc
    * Warnings: @link reference not found (#306)
    * @param conf configuration
-   * @return ClusterConnection object for <code>conf</code> n
+   * @return ClusterConnection object for <code>conf</code>
    */
   public static ClusterConnection getMockedConnection(final Configuration conf)
     throws ZooKeeperConnectionException {
@@ -92,7 +92,7 @@ public class HConnectionTestingUtility {
    *         {@link ClusterConnection#getAdmin(ServerName)} is called, returns the passed
    *         {@link ClientProtos.ClientService.BlockingInterface} instance when
    *         {@link ClusterConnection#getClient(ServerName)} is called (Be sure to call
-   *         {@link Connection#close()} when done with this mocked Connection. n
+   *         {@link Connection#close()} when done with this mocked Connection.
    */
   public static ClusterConnection getMockedConnectionAndDecorate(final Configuration conf,
     final AdminProtos.AdminService.BlockingInterface admin,
@@ -137,7 +137,7 @@ public class HConnectionTestingUtility {
    * configuration instance. Be sure to shutdown the connection when done by calling
    * {@link Connection#close()} else it will stick around; this is probably not what you want.
    * @param conf configuration
-   * @return ClusterConnection object for <code>conf</code> n * [Dead link]: See also
+   * @return ClusterConnection object for <code>conf</code> [Dead link]: See also
    *         {http://mockito.googlecode.com/svn/branches/1.6/javadoc/org/mockito/Mockito.html#spy(T)}
    */
   public static ClusterConnection getSpiedConnection(final Configuration conf) throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java
index 91a505b0ed3..1366e2672b4 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java
@@ -138,7 +138,7 @@ public class TestAdmin2 extends TestAdminBase {
   }
 
   /**
-   * Test for hadoop-1581 'HBASE: Unopenable tablename bug'. n
+   * Test for hadoop-1581 'HBASE: Unopenable tablename bug'.
    */
   @Test
   public void testTableNameClash() throws Exception {
@@ -156,7 +156,7 @@ public class TestAdmin2 extends TestAdminBase {
   /***
    * HMaster.createTable used to be kind of synchronous call Thus creating of table with lots of
    * regions can cause RPC timeout After the fix to make createTable truly async, RPC timeout
-   * shouldn't be an issue anymore n
+   * shouldn't be an issue anymore
    */
   @Test
   public void testCreateTableRPCTimeOut() throws Exception {
@@ -179,7 +179,7 @@ public class TestAdmin2 extends TestAdminBase {
   }
 
   /**
-   * Test read only tables n
+   * Test read only tables
    */
   @Test
   public void testReadOnlyTable() throws Exception {
@@ -195,7 +195,7 @@ public class TestAdmin2 extends TestAdminBase {
 
   /**
    * Test that user table names can contain '-' and '.' so long as they do not start with same.
-   * HBASE-771 n
+   * HBASE-771
    */
   @Test
   public void testTableNames() throws IOException {
@@ -219,7 +219,7 @@ public class TestAdmin2 extends TestAdminBase {
   }
 
   /**
-   * For HADOOP-2579 n
+   * For HADOOP-2579
    */
   @Test(expected = TableExistsException.class)
   public void testTableExistsExceptionWithATable() throws IOException {
@@ -229,7 +229,7 @@ public class TestAdmin2 extends TestAdminBase {
   }
 
   /**
-   * Can't disable a table if the table isn't in enabled state n
+   * Can't disable a table if the table isn't in enabled state
    */
   @Test(expected = TableNotEnabledException.class)
   public void testTableNotEnabledExceptionWithATable() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientTimeouts.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientTimeouts.java
index 89b6ec02d58..86b981276f6 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientTimeouts.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestClientTimeouts.java
@@ -86,7 +86,7 @@ public class TestClientTimeouts {
 
   /**
    * Test that a client that fails an RPC to the master retries properly and doesn't throw any
-   * unexpected exceptions. n
+   * unexpected exceptions.
    */
   @Test
   public void testAdminTimeout() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestConnectionImplementation.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestConnectionImplementation.java
index 8518d3b3766..8554c5c6910 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestConnectionImplementation.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestConnectionImplementation.java
@@ -432,7 +432,7 @@ public class TestConnectionImplementation {
 
   /**
    * Test that the connection to the dead server is cut immediately when we receive the
-   * notification. n
+   * notification.
    */
   @Test
   public void testConnectionCut() throws Exception {
@@ -528,7 +528,7 @@ public class TestConnectionImplementation {
   }
 
   /**
-   * Test that when we delete a location using the first row of a region that we really delete it. n
+   * Test that when we delete a location using the first row of a region that we really delete it.
    */
   @Test
   public void testRegionCaching() throws Exception {
@@ -715,7 +715,7 @@ public class TestConnectionImplementation {
   }
 
   /**
-   * Test that Connection or Pool are not closed when managed externally n
+   * Test that Connection or Pool are not closed when managed externally
    */
   @Test
   public void testConnectionManagement() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestEnableTable.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestEnableTable.java
index 5adf67a6470..6a702900b68 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestEnableTable.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestEnableTable.java
@@ -77,7 +77,7 @@ public class TestEnableTable {
   /**
    * We were only clearing rows that had a hregioninfo column in hbase:meta. Mangled rows that were
    * missing the hregioninfo because of error were being left behind messing up any subsequent table
-   * made with the same name. HBASE-12980 nn
+   * made with the same name. HBASE-12980
    */
   @Test
   public void testDeleteForSureClearsAllTableRowsFromMeta()
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java
index b2564adffe9..a28830d7e00 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide3.java
@@ -988,7 +988,7 @@ public class TestFromClientSide3 {
    * to assure cells in memstore are stamped with seqid/mvcc. If cells without mvcc(A.K.A mvcc=0)
    * are put into memstore, then a scanner with a smaller readpoint can see these data, which
    * disobey the multi version concurrency control rules. This test case is to reproduce this
-   * scenario. n
+   * scenario.
    */
   @Test
   public void testMVCCUsingMVCCPreAssign() throws IOException, InterruptedException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideScanExcpetion.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideScanExcpetion.java
index 90ceb4414cf..de75db10993 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideScanExcpetion.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestFromClientSideScanExcpetion.java
@@ -174,7 +174,7 @@ public class TestFromClientSideScanExcpetion {
   /**
    * Tests the case where a Scan can throw an IOException in the middle of the seek / reseek leaving
    * the server side RegionScanner to be in dirty state. The client has to ensure that the
-   * ClientScanner does not get an exception and also sees all the data. nn
+   * ClientScanner does not get an exception and also sees all the data.
    */
   @Test
   public void testClientScannerIsResetWhenScanThrowsIOException()
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestIntraRowPagination.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestIntraRowPagination.java
index aacc34b1cce..173713e60a0 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestIntraRowPagination.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestIntraRowPagination.java
@@ -49,7 +49,7 @@ public class TestIntraRowPagination {
   private static HBaseTestingUtility TEST_UTIL = new HBaseTestingUtility();
 
   /**
-   * Test from client side for scan with maxResultPerCF set n
+   * Test from client side for scan with maxResultPerCF set
    */
   @Test
   public void testScanLimitAndOffset() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaCache.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaCache.java
index cf7e2251612..a7897ae1c61 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaCache.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestMetaCache.java
@@ -384,7 +384,7 @@ public class TestMetaCache {
 
     /**
      * Throw some exceptions. Mostly throw exceptions which do not clear meta cache. Periodically
-     * throw NotSevingRegionException which clears the meta cache. n
+     * throw NotSevingRegionException which clears the meta cache.
      */
     private void throwSomeExceptions(FakeRSRpcServices rpcServices,
       HBaseProtos.RegionSpecifier regionSpec) throws ServiceException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestResult.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestResult.java
index f2ac42d6df8..8cd1f09d422 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestResult.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestResult.java
@@ -72,7 +72,7 @@ public class TestResult extends TestCase {
   static final byte[] qual = Bytes.toBytes("qual");
 
   /**
-   * Run some tests to ensure Result acts like a proper CellScanner. n
+   * Run some tests to ensure Result acts like a proper CellScanner.
    */
   public void testResultAsCellScanner() throws IOException {
     Cell[] cells = genKVs(row, family, value, 1, 10);
@@ -439,7 +439,6 @@ public class TestResult extends TestCase {
 
   /**
    * Microbenchmark that compares {@link Result#getValue} and {@link Result#loadValue} performance.
-   * n
    */
   public void doReadBenchmark() throws Exception {
 
@@ -501,7 +500,7 @@ public class TestResult extends TestCase {
   }
 
   /**
-   * Calls non-functional test methods. n
+   * Calls non-functional test methods.
    */
   public static void main(String[] args) {
     TestResult testResult = new TestResult();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
index d4bb320b41d..01fe893e1d2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannerTimeout.java
@@ -97,7 +97,7 @@ public class TestScannerTimeout {
 
   /**
    * Test that scanner can continue even if the region server it was reading from failed. Before
-   * 2772, it reused the same scanner id. n
+   * 2772, it reused the same scanner id.
    */
   @Test
   public void test2772() throws Exception {
@@ -127,7 +127,7 @@ public class TestScannerTimeout {
 
   /**
    * Test that scanner won't miss any rows if the region server it was reading from failed. Before
-   * 3686, it would skip rows in the scan. n
+   * 3686, it would skip rows in the scan.
    */
   @Test
   public void test3686a() throws Exception {
@@ -170,7 +170,7 @@ public class TestScannerTimeout {
 
   /**
    * Make sure that no rows are lost if the scanner timeout is longer on the client than the server,
-   * and the scan times out on the server but not the client. n
+   * and the scan times out on the server but not the client.
    */
   @Test
   public void test3686b() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannersFromClientSide.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannersFromClientSide.java
index f149eea7317..7b0bce92993 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannersFromClientSide.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestScannersFromClientSide.java
@@ -168,7 +168,7 @@ public class TestScannersFromClientSide {
   }
 
   /**
-   * Test from client side for batch of scan n
+   * Test from client side for batch of scan
    */
   @Test
   public void testScanBatch() throws Exception {
@@ -344,7 +344,7 @@ public class TestScannersFromClientSide {
   }
 
   /**
-   * Run through a variety of test configurations with a small scan nnnnn
+   * Run through a variety of test configurations with a small scan
    */
   private void testSmallScan(Table table, boolean reversed, int rows, int columns)
     throws Exception {
@@ -385,7 +385,7 @@ public class TestScannersFromClientSide {
   }
 
   /**
-   * Test from client side for get with maxResultPerCF set n
+   * Test from client side for get with maxResultPerCF set
    */
   @Test
   public void testGetMaxResults() throws Exception {
@@ -502,7 +502,7 @@ public class TestScannersFromClientSide {
   }
 
   /**
-   * Test from client side for scan with maxResultPerCF set n
+   * Test from client side for scan with maxResultPerCF set
    */
   @Test
   public void testScanMaxResults() throws Exception {
@@ -550,7 +550,7 @@ public class TestScannersFromClientSide {
   }
 
   /**
-   * Test from client side for get with rowOffset n
+   * Test from client side for get with rowOffset
    */
   @Test
   public void testGetRowOffset() throws Exception {
@@ -666,7 +666,7 @@ public class TestScannersFromClientSide {
   }
 
   /**
-   * Test from client side for scan while the region is reopened on the same region server. n
+   * Test from client side for scan while the region is reopened on the same region server.
    */
   @Test
   public void testScanOnReopenedRegion() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
index 7ba83ab58fe..493d4ca4a11 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSizeFailures.java
@@ -158,7 +158,7 @@ public class TestSizeFailures {
   }
 
   /**
-   * Count the number of rows and the number of entries from a scanner n * The Scanner
+   * Count the number of rows and the number of entries from a scanner The Scanner
    * @return An entry where the first item is rows observed and the second is entries observed.
    */
   private Entry<Long, Long> sumTable(ResultScanner scanner) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSmallReversedScanner.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSmallReversedScanner.java
index 4958d3fc62e..a7d094df383 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSmallReversedScanner.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSmallReversedScanner.java
@@ -73,7 +73,7 @@ public class TestSmallReversedScanner {
   }
 
   /**
-   * all rowKeys are fit in the last region. n
+   * all rowKeys are fit in the last region.
    */
   @Test
   public void testSmallReversedScan01() throws IOException {
@@ -116,7 +116,7 @@ public class TestSmallReversedScanner {
   /**
    * Corner case: HBase has 4 regions, (-oo,b),[b,c),[c,d),[d,+oo), and only rowKey with
    * byte[]={0x00} locate in region (-oo,b) . test whether reversed small scanner will return
-   * infinity results with RowKey={0x00}. n
+   * infinity results with RowKey={0x00}.
    */
   @Test
   public void testSmallReversedScan02() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromClient.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromClient.java
index 9c184b75d55..c637b5e9cd0 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromClient.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotFromClient.java
@@ -144,7 +144,7 @@ public class TestSnapshotFromClient {
   }
 
   /**
-   * Test snapshotting not allowed hbase:meta and -ROOT- n
+   * Test snapshotting not allowed hbase:meta and -ROOT-
    */
   @Test
   public void testMetaTablesSnapshot() throws Exception {
@@ -161,7 +161,6 @@ public class TestSnapshotFromClient {
 
   /**
    * Test HBaseAdmin#deleteSnapshots(String) which deletes snapshots whose names match the parameter
-   * n
    */
   @Test
   public void testSnapshotDeletionWithRegex() throws Exception {
@@ -197,7 +196,7 @@ public class TestSnapshotFromClient {
   }
 
   /**
-   * Test snapshotting a table that is offline n
+   * Test snapshotting a table that is offline
    */
   @Test
   public void testOfflineTableSnapshot() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotMetadata.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotMetadata.java
index 105688864cf..fe6bcbfd74f 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotMetadata.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestSnapshotMetadata.java
@@ -240,7 +240,7 @@ public class TestSnapshotMetadata {
 
   /**
    * Verify that when the table is empty, making metadata changes after the restore does not affect
-   * the restored table's original metadata n
+   * the restored table's original metadata
    */
   @Test
   public void testDescribeOnEmptyTableMatchesAfterMetadataChangeAndRestore() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestTimestampsFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestTimestampsFilter.java
index 764908cab2b..0219e5bea08 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestTimestampsFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestTimestampsFilter.java
@@ -95,7 +95,7 @@ public class TestTimestampsFilter {
   /**
    * Test from client side for TimestampsFilter. The TimestampsFilter provides the ability to
    * request cells (KeyValues) whose timestamp/version is in the specified list of
-   * timestamps/version. n
+   * timestamps/version.
    */
   @Test
   public void testTimestampsFilter() throws Exception {
@@ -216,7 +216,7 @@ public class TestTimestampsFilter {
   }
 
   /**
-   * Test TimestampsFilter in the presence of version deletes. n
+   * Test TimestampsFilter in the presence of version deletes.
    */
   @Test
   public void testWithVersionDeletes() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/locking/TestEntityLocks.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/locking/TestEntityLocks.java
index 235113b6bcd..aef5f58d0e7 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/locking/TestEntityLocks.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/locking/TestEntityLocks.java
@@ -114,7 +114,7 @@ public class TestEntityLocks {
   }
 
   /**
-   * Test basic lock function - requestLock, await, unlock. n
+   * Test basic lock function - requestLock, await, unlock.
    */
   @Test
   public void testEntityLock() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/replication/TestReplicationAdmin.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/replication/TestReplicationAdmin.java
index 054c8c086c4..1c44ddb8ecc 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/client/replication/TestReplicationAdmin.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/client/replication/TestReplicationAdmin.java
@@ -211,7 +211,6 @@ public class TestReplicationAdmin {
 
   /**
    * Simple testing of adding and removing peers, basically shows that all interactions with ZK work
-   * n
    */
   @Test
   public void testAddRemovePeer() throws Exception {
@@ -319,7 +318,7 @@ public class TestReplicationAdmin {
   }
 
   /**
-   * basic checks that when we add a peer that it is enabled, and that we can disable n
+   * basic checks that when we add a peer that it is enabled, and that we can disable
    */
   @Test
   public void testEnableDisable() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraint.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraint.java
index 3de0e933836..f8eb026b2ec 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraint.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraint.java
@@ -67,7 +67,7 @@ public class TestConstraint {
   }
 
   /**
-   * Test that we run a passing constraint n
+   * Test that we run a passing constraint
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -97,7 +97,7 @@ public class TestConstraint {
   }
 
   /**
-   * Test that constraints will fail properly n
+   * Test that constraints will fail properly
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -131,7 +131,7 @@ public class TestConstraint {
   }
 
   /**
-   * Check that if we just disable one constraint, then n
+   * Check that if we just disable one constraint, then
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -166,7 +166,7 @@ public class TestConstraint {
   }
 
   /**
-   * Test that if we disable all constraints, then nothing gets run n
+   * Test that if we disable all constraints, then nothing gets run
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -199,7 +199,7 @@ public class TestConstraint {
   }
 
   /**
-   * Check to make sure a constraint is unloaded when it fails n
+   * Check to make sure a constraint is unloaded when it fails
    */
   @Test
   public void testIsUnloaded() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraints.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraints.java
index 142e52a70a5..a772ee3dab1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraints.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/constraint/TestConstraints.java
@@ -101,7 +101,7 @@ public class TestConstraints {
   }
 
   /**
-   * Test that Constraints are properly enabled, disabled, and removed n
+   * Test that Constraints are properly enabled, disabled, and removed
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -135,7 +135,7 @@ public class TestConstraints {
   }
 
   /**
-   * Test that when we update a constraint the ordering is not modified. n
+   * Test that when we update a constraint the ordering is not modified.
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -157,7 +157,7 @@ public class TestConstraints {
 
   /**
    * Test that if a constraint hasn't been set that there are no problems with attempting to remove
-   * it. n * on failure.
+   * it. on failure.
    */
   @Test
   public void testRemoveUnsetConstraint() throws Throwable {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreMasterCoprocessor.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreMasterCoprocessor.java
index 2b4a5480273..e134285c330 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreMasterCoprocessor.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreMasterCoprocessor.java
@@ -87,7 +87,7 @@ public class TestCoreMasterCoprocessor {
 
   /**
    * Assert that when a Coprocessor is annotated with CoreCoprocessor, then it is possible to access
-   * a MasterServices instance. Assert the opposite too. Do it to MasterCoprocessors. n
+   * a MasterServices instance. Assert the opposite too. Do it to MasterCoprocessors.
    */
   @Test
   public void testCoreRegionCoprocessor() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionCoprocessor.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionCoprocessor.java
index c6af35cae40..d50f8c1fea1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionCoprocessor.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionCoprocessor.java
@@ -101,7 +101,7 @@ public class TestCoreRegionCoprocessor {
 
   /**
    * Assert that when a Coprocessor is annotated with CoreCoprocessor, then it is possible to access
-   * a RegionServerServices instance. Assert the opposite too. Do it to RegionCoprocessors. n
+   * a RegionServerServices instance. Assert the opposite too. Do it to RegionCoprocessors.
    */
   @Test
   public void testCoreRegionCoprocessor() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionServerCoprocessor.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionServerCoprocessor.java
index ed6a38522ad..4a97b8261c7 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionServerCoprocessor.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestCoreRegionServerCoprocessor.java
@@ -87,7 +87,7 @@ public class TestCoreRegionServerCoprocessor {
 
   /**
    * Assert that when a Coprocessor is annotated with CoreCoprocessor, then it is possible to access
-   * a RegionServerServices instance. Assert the opposite too. Do it to RegionServerCoprocessors. n
+   * a RegionServerServices instance. Assert the opposite too. Do it to RegionServerCoprocessors.
    */
   @Test
   public void testCoreRegionCoprocessor() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestOpenTableInCoprocessor.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestOpenTableInCoprocessor.java
index 73a7dc5a09b..ccd7ff32b27 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestOpenTableInCoprocessor.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestOpenTableInCoprocessor.java
@@ -195,7 +195,7 @@ public class TestOpenTableInCoprocessor {
   /**
    * Count the number of keyvalue in the table. Scans all possible versions
    * @param table table to scan
-   * @return number of keyvalues over all rows in the table n
+   * @return number of keyvalues over all rows in the table
    */
   private int getKeyValueCount(Table table) throws IOException {
     Scan scan = new Scan();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverBypass.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverBypass.java
index bfed19db16d..ca0367c8a9c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverBypass.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverBypass.java
@@ -98,7 +98,7 @@ public class TestRegionObserverBypass {
   }
 
   /**
-   * do a single put that is bypassed by a RegionObserver n
+   * do a single put that is bypassed by a RegionObserver
    */
   @Test
   public void testSimple() throws Exception {
@@ -112,7 +112,7 @@ public class TestRegionObserverBypass {
   }
 
   /**
-   * Test various multiput operations. If the column family is 'test', then bypass is invoked. n
+   * Test various multiput operations. If the column family is 'test', then bypass is invoked.
    */
   @Test
   public void testMulti() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverForAddingMutationsFromCoprocessors.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverForAddingMutationsFromCoprocessors.java
index c5cd5afed0c..4d3146be0f8 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverForAddingMutationsFromCoprocessors.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverForAddingMutationsFromCoprocessors.java
@@ -104,7 +104,7 @@ public class TestRegionObserverForAddingMutationsFromCoprocessors {
   }
 
   /**
-   * Test various multiput operations. n
+   * Test various multiput operations.
    */
   @Test
   public void testMulti() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
index 3a6fd2f36cc..9e678728ac9 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverInterface.java
@@ -634,7 +634,7 @@ public class TestRegionObserverInterface {
   }
 
   /**
-   * Tests overriding compaction handling via coprocessor hooks n
+   * Tests overriding compaction handling via coprocessor hooks
    */
   @Test
   public void testCompactionOverride() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestColumnPaginationFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestColumnPaginationFilter.java
index 2c1baa8b960..90d8f187c98 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestColumnPaginationFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestColumnPaginationFilter.java
@@ -75,7 +75,7 @@ public class TestColumnPaginationFilter {
 
   /**
    * The more specific functionality tests are contained within the TestFilters class. This class is
-   * mainly for testing serialization nn
+   * mainly for testing serialization
    */
   private void basicFilterTests(ColumnPaginationFilter filter) throws Exception {
     KeyValue c = new KeyValue(ROW, COLUMN_FAMILY, COLUMN_QUALIFIER, VAL_1);
@@ -83,7 +83,7 @@ public class TestColumnPaginationFilter {
   }
 
   /**
-   * Tests serialization n
+   * Tests serialization
    */
   @Test
   public void testSerialization() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java
index ef6d6da98e3..e24d8e27c51 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestDependentColumnFilter.java
@@ -135,7 +135,7 @@ public class TestDependentColumnFilter {
 
   /**
    * This shouldn't be confused with TestFilter#verifyScan as expectedKeys is not the per row total,
-   * but the scan total nnnn
+   * but the scan total
    */
   private void verifyScan(Scan s, long expectedRows, long expectedCells) throws IOException {
     InternalScanner scanner = this.region.getScanner(s);
@@ -210,7 +210,7 @@ public class TestDependentColumnFilter {
   }
 
   /**
-   * Test that the filter correctly drops rows without a corresponding timestamp n
+   * Test that the filter correctly drops rows without a corresponding timestamp
    */
   @Test
   public void testFilterDropping() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java
index 2076e98ef94..8cc37707a12 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java
@@ -542,7 +542,7 @@ public class TestFilter {
 
   /**
    * Tests the the {@link WhileMatchFilter} works in combination with a {@link Filter} that uses the
-   * {@link Filter#filterRow()} method. See HBASE-2258. n
+   * {@link Filter#filterRow()} method. See HBASE-2258.
    */
   @Test
   public void testWhileMatchFilterWithFilterRow() throws Exception {
@@ -598,7 +598,7 @@ public class TestFilter {
 
   /**
    * The following test is to ensure old(such as hbase0.94) filterRow() can be correctly fired in
-   * 0.96+ code base. See HBASE-10366 n
+   * 0.96+ code base. See HBASE-10366
    */
   @Test
   public void test94FilterRowCompatibility() throws Exception {
@@ -614,7 +614,7 @@ public class TestFilter {
 
   /**
    * Tests the the {@link WhileMatchFilter} works in combination with a {@link Filter} that uses the
-   * {@link Filter#filterRowKey(Cell)} method. See HBASE-2258. n
+   * {@link Filter#filterRowKey(Cell)} method. See HBASE-2258.
    */
   @Test
   public void testWhileMatchFilterWithFilterRowKey() throws Exception {
@@ -639,7 +639,7 @@ public class TestFilter {
 
   /**
    * Tests the the {@link WhileMatchFilter} works in combination with a {@link Filter} that uses the
-   * {@link Filter#filterCell(Cell)} method. See HBASE-2258. n
+   * {@link Filter#filterCell(Cell)} method. See HBASE-2258.
    */
   @Test
   public void testWhileMatchFilterWithFilterCell() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterList.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterList.java
index 7a867d41a78..6c278b362c8 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterList.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterList.java
@@ -120,7 +120,7 @@ public class TestFilterList {
   }
 
   /**
-   * Test "must pass one" n
+   * Test "must pass one"
    */
   @Test
   public void testMPONE() throws Exception {
@@ -177,7 +177,7 @@ public class TestFilterList {
   }
 
   /**
-   * Test "must pass all" n
+   * Test "must pass all"
    */
   @Test
   public void testMPALL() throws Exception {
@@ -218,7 +218,7 @@ public class TestFilterList {
   }
 
   /**
-   * Test list ordering n
+   * Test list ordering
    */
   @Test
   public void testOrdering() throws Exception {
@@ -275,7 +275,7 @@ public class TestFilterList {
 
   /**
    * When we do a "MUST_PASS_ONE" (a logical 'OR') of the above two filters we expect to get the
-   * same result as the 'prefix' only result. n
+   * same result as the 'prefix' only result.
    */
   @Test
   public void testFilterListTwoFiltersMustPassOne() throws Exception {
@@ -307,7 +307,7 @@ public class TestFilterList {
 
   /**
    * When we do a "MUST_PASS_ONE" (a logical 'OR') of the two filters we expect to get the same
-   * result as the inclusive stop result. n
+   * result as the inclusive stop result.
    */
   @Test
   public void testFilterListWithInclusiveStopFilterMustPassOne() throws Exception {
@@ -344,7 +344,7 @@ public class TestFilterList {
   }
 
   /**
-   * Test serialization n
+   * Test serialization
    */
   @Test
   public void testSerialization() throws Exception {
@@ -366,7 +366,7 @@ public class TestFilterList {
   }
 
   /**
-   * Test filterCell logic. n
+   * Test filterCell logic.
    */
   @Test
   public void testFilterCell() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterListOrOperatorWithBlkCnt.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterListOrOperatorWithBlkCnt.java
index edacf260353..483064b41b0 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterListOrOperatorWithBlkCnt.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilterListOrOperatorWithBlkCnt.java
@@ -70,8 +70,7 @@ public class TestFilterListOrOperatorWithBlkCnt {
   public TestName name = new TestName();
 
   /**
-   * n
-   */
+   *   */
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     long blkSize = 4096;
@@ -85,8 +84,7 @@ public class TestFilterListOrOperatorWithBlkCnt {
   }
 
   /**
-   * n
-   */
+   *   */
   @AfterClass
   public static void tearDownAfterClass() throws Exception {
     TEST_UTIL.shutdownMiniCluster();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFirstKeyValueMatchingQualifiersFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFirstKeyValueMatchingQualifiersFilter.java
index ee82ec050db..ebc113e03e5 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFirstKeyValueMatchingQualifiersFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFirstKeyValueMatchingQualifiersFilter.java
@@ -45,7 +45,7 @@ public class TestFirstKeyValueMatchingQualifiersFilter extends TestCase {
 
   /**
    * Test the functionality of
-   * {@link FirstKeyValueMatchingQualifiersFilter#filterCell(org.apache.hadoop.hbase.Cell)} n
+   * {@link FirstKeyValueMatchingQualifiersFilter#filterCell(org.apache.hadoop.hbase.Cell)}
    */
   public void testFirstKeyMatchingQualifierFilter() throws Exception {
     Set<byte[]> quals = new TreeSet<>(Bytes.BYTES_COMPARATOR);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestInclusiveStopFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestInclusiveStopFilter.java
index b76ce49ed8c..06fed4dc7ff 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestInclusiveStopFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestInclusiveStopFilter.java
@@ -52,7 +52,7 @@ public class TestInclusiveStopFilter {
   }
 
   /**
-   * Tests identification of the stop row n
+   * Tests identification of the stop row
    */
   @Test
   public void testStopRowIdentification() throws Exception {
@@ -60,7 +60,7 @@ public class TestInclusiveStopFilter {
   }
 
   /**
-   * Tests serialization n
+   * Tests serialization
    */
   @Test
   public void testSerialization() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestMultiRowRangeFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestMultiRowRangeFilter.java
index 0a808d5b4d7..56f6b6ac058 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestMultiRowRangeFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestMultiRowRangeFilter.java
@@ -67,16 +67,14 @@ public class TestMultiRowRangeFilter {
   public TestName name = new TestName();
 
   /**
-   * n
-   */
+   *   */
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     TEST_UTIL.startMiniCluster();
   }
 
   /**
-   * n
-   */
+   *   */
   @AfterClass
   public static void tearDownAfterClass() throws Exception {
     TEST_UTIL.shutdownMiniCluster();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestPageFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestPageFilter.java
index 46ef9edb931..80591422a01 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestPageFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestPageFilter.java
@@ -42,7 +42,7 @@ public class TestPageFilter {
   static final int ROW_LIMIT = 3;
 
   /**
-   * test page size filter n
+   * test page size filter
    */
   @Test
   public void testPageSize() throws Exception {
@@ -51,7 +51,7 @@ public class TestPageFilter {
   }
 
   /**
-   * Test filter serialization n
+   * Test filter serialization
    */
   @Test
   public void testSerialization() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestRandomRowFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestRandomRowFilter.java
index cbced421453..8454ab357ae 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestRandomRowFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestRandomRowFilter.java
@@ -44,7 +44,7 @@ public class TestRandomRowFilter {
   }
 
   /**
-   * Tests basics n
+   * Tests basics
    */
   @Test
   public void testBasics() throws Exception {
@@ -63,7 +63,7 @@ public class TestRandomRowFilter {
   }
 
   /**
-   * Tests serialization n
+   * Tests serialization
    */
   @Test
   public void testSerialization() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueExcludeFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueExcludeFilter.java
index fc1caf6052d..38f7ed46538 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueExcludeFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueExcludeFilter.java
@@ -55,7 +55,7 @@ public class TestSingleColumnValueExcludeFilter {
   private static final byte[] VAL_2 = Bytes.toBytes("ab");
 
   /**
-   * Test the overridden functionality of filterCell(Cell) n
+   * Test the overridden functionality of filterCell(Cell)
    */
   @Test
   public void testFilterCell() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueFilter.java
index dc2dbd931a1..fa43f10c1fe 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestSingleColumnValueFilter.java
@@ -242,7 +242,7 @@ public class TestSingleColumnValueFilter {
   }
 
   /**
-   * Tests identification of the stop row n
+   * Tests identification of the stop row
    */
   @Test
   public void testStop() throws Exception {
@@ -254,7 +254,7 @@ public class TestSingleColumnValueFilter {
   }
 
   /**
-   * Tests serialization n
+   * Tests serialization
    */
   @Test
   public void testSerialization() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHalfStoreFileReader.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHalfStoreFileReader.java
index e6870c489fa..7020ad9f559 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHalfStoreFileReader.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHalfStoreFileReader.java
@@ -79,7 +79,7 @@ public class TestHalfStoreFileReader {
    * may or may not be a 'next' in the scanner/file. A bug in the half file scanner was returning -1
    * at the end of the bottom half, and that was causing the infrastructure above to go null causing
    * NPEs and other problems. This test reproduces that failure, and also tests both the bottom and
-   * top of the file while we are at it. n
+   * top of the file while we are at it.
    */
   @Test
   public void testHalfScanAndReseek() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHeapSize.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHeapSize.java
index 1ba421f4e90..a1f65141d94 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHeapSize.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/TestHeapSize.java
@@ -289,7 +289,7 @@ public class TestHeapSize {
 
   /**
    * Testing the classes that implements HeapSize and are a part of 0.20. Some are not tested here
-   * for example BlockIndex which is tested in TestHFile since it is a non public class n
+   * for example BlockIndex which is tested in TestHFile since it is a non public class
    */
   @Test
   public void testSizes() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestDataBlockEncoders.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestDataBlockEncoders.java
index 9a44c3f5106..9402c762f34 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestDataBlockEncoders.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/encoding/TestDataBlockEncoders.java
@@ -114,7 +114,7 @@ public class TestDataBlockEncoders {
   }
 
   /**
-   * Test data block encoding of empty KeyValue. n * On test failure.
+   * Test data block encoding of empty KeyValue. On test failure.
    */
   @Test
   public void testEmptyKeyValues() throws IOException {
@@ -138,7 +138,7 @@ public class TestDataBlockEncoders {
   }
 
   /**
-   * Test KeyValues with negative timestamp. n * On test failure.
+   * Test KeyValues with negative timestamp. On test failure.
    */
   @Test
   public void testNegativeTimestamps() throws IOException {
@@ -289,7 +289,7 @@ public class TestDataBlockEncoders {
   }
 
   /**
-   * Test whether the decompression of first key is implemented correctly. n
+   * Test whether the decompression of first key is implemented correctly.
    */
   @Test
   public void testFirstKeyInBlockOnSample() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/NanoTimer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/NanoTimer.java
index 41886bb1575..396b5076db2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/NanoTimer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/NanoTimer.java
@@ -30,7 +30,7 @@ public class NanoTimer {
   private long cumulate = 0;
 
   /**
-   * Constructor n * Start the timer upon construction.
+   * Constructor Start the timer upon construction.
    */
   public NanoTimer(boolean start) {
     if (start) this.start();
@@ -99,7 +99,7 @@ public class NanoTimer {
 
   /**
    * A utility method to format a time duration in nano seconds into a human understandable stirng.
-   * n * Time duration in nano seconds.
+   * Time duration in nano seconds.
    * @return String representation.
    */
   public static String nanoTimeToString(long t) {
@@ -163,7 +163,7 @@ public class NanoTimer {
   }
 
   /**
-   * Simple tester. n
+   * Simple tester.
    */
   public static void main(String[] args) {
     long i = 7;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomDistribution.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomDistribution.java
index a8e122b1512..b6d84dd0b6c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomDistribution.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomDistribution.java
@@ -51,7 +51,7 @@ public class RandomDistribution {
 
     /**
      * Generate random integers from min (inclusive) to max (exclusive) following even distribution.
-     * n * The basic random number generator. n * Minimum integer n * maximum integer (exclusive).
+     * The basic random number generator. Minimum integer maximum integer (exclusive).
      */
     public Flat(Random random, int min, int max) {
       if (min >= max) {
@@ -82,17 +82,16 @@ public class RandomDistribution {
     private final ArrayList<Double> v;
 
     /**
-     * Constructor n * The random number generator. n * minimum integer (inclusvie) n * maximum
-     * integer (exclusive) n * parameter sigma. (sigma > 1.0)
+     * Constructor The random number generator. minimum integer (inclusvie) maximum integer
+     * (exclusive) parameter sigma. (sigma > 1.0)
      */
     public Zipf(Random r, int min, int max, double sigma) {
       this(r, min, max, sigma, DEFAULT_EPSILON);
     }
 
     /**
-     * Constructor. n * The random number generator. n * minimum integer (inclusvie) n * maximum
-     * integer (exclusive) n * parameter sigma. (sigma > 1.0) n * Allowable error percentage (0 <
-     * epsilon < 1.0).
+     * Constructor. The random number generator. minimum integer (inclusvie) maximum integer
+     * (exclusive) parameter sigma. (sigma > 1.0) Allowable error percentage (0 < epsilon < 1.0).
      */
     public Zipf(Random r, int min, int max, double sigma, double epsilon) {
       if ((max <= min) || (sigma <= 1) || (epsilon <= 0) || (epsilon >= 0.5)) {
@@ -178,8 +177,8 @@ public class RandomDistribution {
 
     /**
      * Generate random integers from min (inclusive) to max (exclusive) following Binomial
-     * distribution. n * The basic random number generator. n * Minimum integer n * maximum integer
-     * (exclusive). n * parameter.
+     * distribution. The basic random number generator. Minimum integer maximum integer (exclusive).
+     * parameter.
      */
     public Binomial(Random random, int min, int max, double p) {
       if (min >= max) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomKeyValueUtil.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomKeyValueUtil.java
index c4c8bc9bfda..27ff684e2cd 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomKeyValueUtil.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/RandomKeyValueUtil.java
@@ -71,7 +71,8 @@ public class RandomKeyValueUtil {
    * Generates a random key that is guaranteed to increase as the given index i increases. The
    * result consists of a prefix, which is a deterministic increasing function of i, and a random
    * suffix.
-   * @param rand random number generator to use n * @return the random key
+   * @param rand random number generator to use
+   * @return the random key
    */
   public static byte[] randomOrderedKey(Random rand, int i) {
     StringBuilder k = new StringBuilder();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFile.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFile.java
index 50a704f36c7..035012eb403 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFile.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFile.java
@@ -307,7 +307,7 @@ public class TestHFile {
   }
 
   /**
-   * Test empty HFile. Test all features work reasonably when hfile is empty of entries. n
+   * Test empty HFile. Test all features work reasonably when hfile is empty of entries.
    */
   @Test
   public void testEmptyHFile() throws IOException {
@@ -488,7 +488,7 @@ public class TestHFile {
   }
 
   /**
-   * test none codecs n
+   * test none codecs
    */
   void basicWithSomeCodec(String codec, boolean useTags) throws IOException {
     if (useTags) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlockIndex.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlockIndex.java
index 031ede45dcf..f13a343e867 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlockIndex.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileBlockIndex.java
@@ -494,7 +494,7 @@ public class TestHFileBlockIndex {
   }
 
   /**
-   * to check if looks good when midKey on a leaf index block boundary n
+   * to check if looks good when midKey on a leaf index block boundary
    */
   @Test
   public void testMidKeyOnLeafIndexBlockBoundary() throws IOException {
@@ -551,7 +551,6 @@ public class TestHFileBlockIndex {
   /**
    * Testing block index through the HFile writer/reader APIs. Allows to test setting index block
    * size through configuration, intermediate-level index blocks, and caching index blocks on write.
-   * n
    */
   @Test
   public void testHFileWriterAndReader() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileDataBlockEncoder.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileDataBlockEncoder.java
index 8aacec577ee..6a13d695ee2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileDataBlockEncoder.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/TestHFileDataBlockEncoder.java
@@ -134,7 +134,7 @@ public class TestHFileDataBlockEncoder {
   }
 
   /**
-   * Test encoding. n
+   * Test encoding.
    */
   @Test
   public void testEncoding() throws IOException {
@@ -144,7 +144,7 @@ public class TestHFileDataBlockEncoder {
 
   /**
    * Test encoding with offheap keyvalue. This test just verifies if the encoders work with DBB and
-   * does not use the getXXXArray() API n
+   * does not use the getXXXArray() API
    */
   @Test
   public void testEncodingWithOffheapKeyValue() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCache.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCache.java
index 175c3cdc8a9..772c7b0acfe 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCache.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCache.java
@@ -312,8 +312,7 @@ public class TestBucketCache {
       bucketCache.cacheBlock(block.getBlockName(), block.getBlock());
     }
     for (HFileBlockPair block : blocks) {
-      cacheAndWaitUntilFlushedToBucket(bucketCache, block.getBlockName(), block.getBlock(),
-        false);
+      cacheAndWaitUntilFlushedToBucket(bucketCache, block.getBlockName(), block.getBlock(), false);
     }
     usedSize = bucketCache.getAllocator().getUsedSize();
     assertNotEquals(0, usedSize);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCacheRefCnt.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCacheRefCnt.java
index 1593900d7d6..de27d808864 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCacheRefCnt.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCacheRefCnt.java
@@ -317,8 +317,6 @@ public class TestBucketCacheRefCnt {
    *    by Thread2 and the content of Block1 would be overwritten after it is freed, which may
    *    cause a serious error.
    * </pre>
-   *
-   * n
    */
   @Test
   public void testReplacingBlockAndGettingBlockConcurrently() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketWriterThread.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketWriterThread.java
index d62e5a46cf2..d033dabbcff 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketWriterThread.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketWriterThread.java
@@ -102,7 +102,7 @@ public class TestBucketWriterThread {
   }
 
   /**
-   * Test non-error case just works. nnn
+   * Test non-error case just works.
    */
   @Test
   public void testNonErrorCase() throws IOException, InterruptedException {
@@ -112,7 +112,7 @@ public class TestBucketWriterThread {
 
   /**
    * Pass through a too big entry and ensure it is cleared from queues and ramCache. Manually run
-   * the WriterThread. n
+   * the WriterThread.
    */
   @Test
   public void testTooBigEntry() throws InterruptedException {
@@ -124,7 +124,7 @@ public class TestBucketWriterThread {
 
   /**
    * Do IOE. Take the RAMQueueEntry that was on the queue, doctor it to throw exception, then put it
-   * back and process it. nn
+   * back and process it.
    */
   @SuppressWarnings("unchecked")
   @Test
@@ -141,7 +141,7 @@ public class TestBucketWriterThread {
   }
 
   /**
-   * Do Cache full exception nn
+   * Do Cache full exception
    */
   @Test
   public void testCacheFullException() throws IOException, InterruptedException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/MockRegionServer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/MockRegionServer.java
index ba332d985c1..72a3ad044c3 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/MockRegionServer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/MockRegionServer.java
@@ -194,8 +194,7 @@ class MockRegionServer implements AdminProtos.AdminService.BlockingInterface,
   private final Map<Long, RegionNameAndIndex> scannersAndOffsets = new HashMap<>();
 
   /**
-   * @param sn Name of this mock regionserver n * @throws
-   *           org.apache.hadoop.hbase.ZooKeeperConnectionException
+   * @param sn Name of this mock regionserver
    */
   MockRegionServer(final Configuration conf, final ServerName sn)
     throws ZooKeeperConnectionException, IOException {
@@ -223,7 +222,7 @@ class MockRegionServer implements AdminProtos.AdminService.BlockingInterface,
   }
 
   /**
-   * Use this method to set what a scanner will reply as we next through nn
+   * Use this method to set what a scanner will reply as we next through
    */
   void setNextResults(final byte[] regionName, final Result[] rs) {
     this.nexts.put(regionName, rs);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestActiveMasterManager.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestActiveMasterManager.java
index 277965c4243..eafee8a2ab6 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestActiveMasterManager.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestActiveMasterManager.java
@@ -121,7 +121,7 @@ public class TestActiveMasterManager {
 
   /**
    * Unit tests that uses ZooKeeper but does not use the master-side methods but rather acts
-   * directly on ZK. n
+   * directly on ZK.
    */
   @Test
   public void testActiveMasterManagerFromZK() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterFailoverBalancerPersistence.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterFailoverBalancerPersistence.java
index 1fc85b82629..471cb45ed91 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterFailoverBalancerPersistence.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterFailoverBalancerPersistence.java
@@ -44,7 +44,7 @@ public class TestMasterFailoverBalancerPersistence {
 
   /**
    * Test that if the master fails, the load balancer maintains its state (running or not) when the
-   * next master takes over n
+   * next master takes over
    */
   @Test
   public void testMasterFailoverBalancerPersistence() throws Exception {
@@ -82,8 +82,8 @@ public class TestMasterFailoverBalancerPersistence {
   }
 
   /**
-   * Kill the master and wait for a new active master to show up n * @return the new active master n
-   * * @throws java.io.IOException
+   * Kill the master and wait for a new active master to show up
+   * @return the new active master
    */
   private HMaster killActiveAndWaitForNewActive(MiniHBaseCluster cluster)
     throws InterruptedException, IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterNoCluster.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterNoCluster.java
index 808c3dd15ce..b9731f6b4f6 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterNoCluster.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterNoCluster.java
@@ -134,7 +134,7 @@ public class TestMasterNoCluster {
   }
 
   /**
-   * Test starting master then stopping it before its fully up. nnn
+   * Test starting master then stopping it before its fully up.
    */
   @Test
   public void testStopDuringStart() throws IOException, KeeperException, InterruptedException {
@@ -146,8 +146,8 @@ public class TestMasterNoCluster {
   }
 
   /**
-   * Test master failover. Start up three fake regionservers and a master. nnn * @throws
-   * org.apache.hbase.thirdparty.com.google.protobuf.ServiceException
+   * Test master failover. Start up three fake regionservers and a master.
+   * @throws org.apache.hbase.thirdparty.com.google.protobuf.ServiceException
    */
   @Ignore
   @Test // Disabled since HBASE-18511. Reenable when master can carry regions.
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterTransitions.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterTransitions.java
index 3ca228e19a9..a99c7aa97d1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterTransitions.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestMasterTransitions.java
@@ -63,7 +63,7 @@ public class TestMasterTransitions {
     new byte[][] { Bytes.toBytes("a"), Bytes.toBytes("b"), Bytes.toBytes("c") };
 
   /**
-   * Start up a mini cluster and put a small table of many empty regions into it. n
+   * Start up a mini cluster and put a small table of many empty regions into it.
    */
   @BeforeClass
   public static void beforeAllTests() throws Exception {
@@ -124,7 +124,7 @@ public class TestMasterTransitions {
    * RegionServerOperation op) { if (isWantedCloseOperation(op) != null) return; this.done = true; }
    */
   /*
-   * n * @return Null if not the wanted ProcessRegionClose, else <code>op</code> cast as a
+   * @return Null if not the wanted ProcessRegionClose, else <code>op</code> cast as a
    * ProcessRegionClose.
    */
   /*
@@ -285,7 +285,7 @@ public class TestMasterTransitions {
    * entry in its startkey because of addRowToEachRegion. byte [] row = getStartKey(hri); HTable t =
    * new HTable(TEST_UTIL.getConfiguration(), TABLENAME); Get g = new Get(row);
    * assertTrue((t.get(g)).size() > 0); } /*
-   * @return Count of regions in meta table. n
+   * @return Count of regions in meta table.
    */
   /*
    * private static int countOfMetaRegions() throws IOException { HTable meta = new
@@ -297,7 +297,7 @@ public class TestMasterTransitions {
    */
   /*
    * Add to each of the regions in hbase:meta a value. Key is the startrow of the region (except its
-   * 'aaa' for first region). Actual value is the row name. nnn
+   * 'aaa' for first region). Actual value is the row name.
    */
   private static int addToEachStartKey(final int expected) throws IOException {
     Table t = TEST_UTIL.getConnection().getTable(TABLENAME);
@@ -332,7 +332,7 @@ public class TestMasterTransitions {
   }
 
   /*
-   * n * @return Start key for hri (If start key is '', then return 'aaa'.
+   * @return Start key for hri (If start key is '', then return 'aaa'.
    */
   private static byte[] getStartKey(final RegionInfo hri) {
     return Bytes.equals(HConstants.EMPTY_START_ROW, hri.getStartKey())
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlacement.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlacement.java
index bc93221a054..63769b23d43 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlacement.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestRegionPlacement.java
@@ -342,7 +342,7 @@ public class TestRegionPlacement {
   /**
    * To verify the region assignment status. It will check the assignment plan consistency between
    * hbase:meta and region servers. Also it will verify weather the number of region movement and
-   * the number regions on the primary region server are expected nnnnn
+   * the number regions on the primary region server are expected
    */
   private void verifyRegionAssignment(FavoredNodesPlan plan, int regionMovementNum,
     int numRegionsOnPrimaryRS) throws InterruptedException, IOException {
@@ -403,7 +403,7 @@ public class TestRegionPlacement {
   /**
    * Verify the number of user regions is assigned to the primary region server based on the plan is
    * expected
-   * @param expectedNum the expected number of assigned regions n
+   * @param expectedNum the expected number of assigned regions
    */
   private void verifyRegionOnPrimaryRS(int expectedNum) throws IOException {
     lastRegionOnPrimaryRSCount = getNumRegionisOnPrimaryRS();
@@ -413,7 +413,7 @@ public class TestRegionPlacement {
   }
 
   /**
-   * Verify all the online region servers has been updated to the latest assignment plan nn
+   * Verify all the online region servers has been updated to the latest assignment plan
    */
   private void verifyRegionServerUpdated(FavoredNodesPlan plan) throws IOException {
     // Verify all region servers contain the correct favored nodes information
@@ -461,7 +461,7 @@ public class TestRegionPlacement {
    * Check whether regions are assigned to servers consistent with the explicit hints that are
    * persisted in the hbase:meta table. Also keep track of the number of the regions are assigned to
    * the primary region server.
-   * @return the number of regions are assigned to the primary region server n
+   * @return the number of regions are assigned to the primary region server
    */
   private int getNumRegionisOnPrimaryRS() throws IOException {
     final AtomicInteger regionOnPrimaryNum = new AtomicInteger(0);
@@ -528,7 +528,7 @@ public class TestRegionPlacement {
   /**
    * Create a table with specified table name and region number.
    * @param tableName the name of the table to be created
-   * @param regionNum number of regions to create n
+   * @param regionNum number of regions to create
    */
   private static void createTable(TableName tableName, int regionNum) throws IOException {
     int expectedRegions = regionNum;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.java
index e4ad4616bd2..0268fbf1a60 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/BalancerTestBase.java
@@ -297,8 +297,8 @@ public class BalancerTestBase {
 
   /**
    * This assumes the RegionPlan HSI instances are the same ones in the map, so actually no need to
-   * even pass in the map, but I think it's clearer. nn * @return a list of all added
-   * {@link ServerAndLoad} values.
+   * even pass in the map, but I think it's clearer.
+   * @return a list of all added {@link ServerAndLoad} values.
    */
   protected List<ServerAndLoad> reconcile(List<ServerAndLoad> list, List<RegionPlan> plans,
     Map<ServerName, List<RegionInfo>> servers) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
index b849f5a1197..05b764f0018 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestBaseLoadBalancer.java
@@ -129,7 +129,7 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
   }
 
   /**
-   * All regions have an assignment. nnn
+   * All regions have an assignment.
    */
   private void assertImmediateAssignment(List<RegionInfo> regions, List<ServerName> servers,
     Map<RegionInfo, ServerName> assignments) {
@@ -141,7 +141,7 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
   /**
    * Tests the bulk assignment used during cluster startup. Round-robin. Should yield a balanced
    * cluster so same invariant as the load balancer holds, all servers holding either floor(avg) or
-   * ceiling(avg). n
+   * ceiling(avg).
    */
   @Test
   public void testBulkAssignment() throws Exception {
@@ -180,7 +180,7 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
   }
 
   /**
-   * Test the cluster startup bulk assignment which attempts to retain assignment info. n
+   * Test the cluster startup bulk assignment which attempts to retain assignment info.
    */
   @Test
   public void testRetainAssignment() throws Exception {
@@ -407,7 +407,6 @@ public class TestBaseLoadBalancer extends BalancerTestBase {
    * <li>If a region had an existing assignment to a server with the same address a a currently
    * online server, it will be assigned to it
    * </ul>
-   * nnn
    */
   private void assertRetainedAssignment(Map<RegionInfo, ServerName> existing,
     List<ServerName> servers, Map<ServerName, List<RegionInfo>> assignment) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestSimpleLoadBalancer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestSimpleLoadBalancer.java
index e7a7bee1eec..bd87282d894 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestSimpleLoadBalancer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestSimpleLoadBalancer.java
@@ -144,7 +144,7 @@ public class TestSimpleLoadBalancer extends BalancerTestBase {
    * Test the load balancing algorithm. Invariant is that all servers should be hosting either
    * floor(average) or ceiling(average) at both table level and cluster level Deliberately generate
    * a special case to show the overall strategy can achieve cluster level balance while the bytable
-   * strategy cannot n
+   * strategy cannot
    */
   @Test
   public void testImpactOfBalanceClusterOverall() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitor.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitor.java
index 09713e5bde2..73c9532ae4b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitor.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitor.java
@@ -339,7 +339,7 @@ public class TestCatalogJanitor {
   }
 
   /**
-   * Test that we correctly archive all the storefiles when a region is deleted n
+   * Test that we correctly archive all the storefiles when a region is deleted
    */
   @Test
   public void testSplitParentFirstComparator() {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitorInMemoryStates.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitorInMemoryStates.java
index 9f08fba4a0b..065741a86e1 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitorInMemoryStates.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestCatalogJanitorInMemoryStates.java
@@ -172,8 +172,8 @@ public class TestCatalogJanitorInMemoryStates {
 
   /*
    * Wait on region split. May return because we waited long enough on the split and it didn't
-   * happen. Caller should check. n * @return Daughter regions; caller needs to check table actually
-   * split.
+   * happen. Caller should check.
+   * @return Daughter regions; caller needs to check table actually split.
    */
   private PairOfSameType<RegionInfo> waitOnDaughters(final RegionInfo r) throws IOException {
     long start = System.currentTimeMillis();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureTestingUtility.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureTestingUtility.java
index bce54f326a4..69170cf3904 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureTestingUtility.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/MasterProcedureTestingUtility.java
@@ -473,7 +473,7 @@ public class MasterProcedureTestingUtility {
   public interface StepHook {
     /**
      * @param step Step no. at which this will be executed
-     * @return false if test should fail otherwise true n
+     * @return false if test should fail otherwise true
      */
     boolean execute(int step) throws IOException;
   }
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestTableDescriptorModificationFromClient.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestTableDescriptorModificationFromClient.java
index ccff2afd23c..faab7a03166 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestTableDescriptorModificationFromClient.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/master/procedure/TestTableDescriptorModificationFromClient.java
@@ -66,7 +66,7 @@ public class TestTableDescriptorModificationFromClient {
   private static final byte[] FAMILY_1 = Bytes.toBytes("cf1");
 
   /**
-   * Start up a mini cluster and put a small table of empty regions into it. n
+   * Start up a mini cluster and put a small table of empty regions into it.
    */
   @BeforeClass
   public static void beforeAllTests() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/mob/MobTestUtil.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/mob/MobTestUtil.java
index 5a158e6dc55..1c76fe4ac1d 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/mob/MobTestUtil.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/mob/MobTestUtil.java
@@ -54,7 +54,7 @@ public class MobTestUtil {
   }
 
   /*
-   * Writes HStoreKey and ImmutableBytes data to passed writer and then closes it. n * n
+   * Writes HStoreKey and ImmutableBytes data to passed writer and then closes it.
    */
   private static void writeStoreFile(final StoreFileWriter writer, byte[] fam, byte[] qualifier)
     throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/SimpleRSProcedureManager.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/SimpleRSProcedureManager.java
index b5bb1e03fa6..ee5a119e491 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/SimpleRSProcedureManager.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/SimpleRSProcedureManager.java
@@ -140,7 +140,7 @@ public class SimpleRSProcedureManager extends RegionServerProcedureManager {
 
     /**
      * Wait for all of the currently outstanding tasks submitted via {@link #submitTask(Callable)}
-     * @return <tt>true</tt> on success, <tt>false</tt> otherwise n
+     * @return <tt>true</tt> on success, <tt>false</tt> otherwise
      */
     public boolean waitForOutstandingTasks() throws ForeignException {
       LOG.debug("Waiting for procedure to finish.");
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestZKProcedureControllers.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestZKProcedureControllers.java
index 6e57d9042c4..1c1ccac27df 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestZKProcedureControllers.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/procedure/TestZKProcedureControllers.java
@@ -318,8 +318,8 @@ public class TestZKProcedureControllers {
   }
 
   /**
-   * n * @return a mock {@link ProcedureCoordinator} that just counts down the prepared and
-   * committed latch for called to the respective method
+   * @return a mock {@link ProcedureCoordinator} that just counts down the prepared and committed
+   *         latch for called to the respective method
    */
   private ProcedureCoordinator setupMockCoordinator(String operationName,
     final CountDownLatch prepared, final CountDownLatch committed,
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestProtobufUtil.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestProtobufUtil.java
index a62cc29537e..c4137fd7119 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestProtobufUtil.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestProtobufUtil.java
@@ -84,7 +84,7 @@ public class TestProtobufUtil {
   }
 
   /**
-   * Test basic Get conversions. n
+   * Test basic Get conversions.
    */
   @Test
   public void testGet() throws IOException {
@@ -116,7 +116,7 @@ public class TestProtobufUtil {
   }
 
   /**
-   * Test Append Mutate conversions. n
+   * Test Append Mutate conversions.
    */
   @Test
   public void testAppend() throws IOException {
@@ -175,7 +175,7 @@ public class TestProtobufUtil {
   }
 
   /**
-   * Test Delete Mutate conversions. n
+   * Test Delete Mutate conversions.
    */
   @Test
   public void testDelete() throws IOException {
@@ -217,7 +217,7 @@ public class TestProtobufUtil {
   }
 
   /**
-   * Test Increment Mutate conversions. n
+   * Test Increment Mutate conversions.
    */
   @Test
   public void testIncrement() throws IOException {
@@ -270,7 +270,7 @@ public class TestProtobufUtil {
   }
 
   /**
-   * Test Put Mutate conversions. n
+   * Test Put Mutate conversions.
    */
   @Test
   public void testPut() throws IOException {
@@ -315,7 +315,7 @@ public class TestProtobufUtil {
   }
 
   /**
-   * Test basic Scan conversions. n
+   * Test basic Scan conversions.
    */
   @Test
   public void testScan() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestReplicationProtobuf.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestReplicationProtobuf.java
index e43fe99649c..a42ba4730c7 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestReplicationProtobuf.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/protobuf/TestReplicationProtobuf.java
@@ -41,7 +41,7 @@ public class TestReplicationProtobuf {
     HBaseClassTestRule.forClass(TestReplicationProtobuf.class);
 
   /**
-   * Little test to check we can basically convert list of a list of KVs into a CellScanner n
+   * Little test to check we can basically convert list of a list of KVs into a CellScanner
    */
   @Test
   public void testGetCellScanner() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/CreateRandomStoreFile.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/CreateRandomStoreFile.java
index 3bb18d8f5ce..4754c5ba530 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/CreateRandomStoreFile.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/CreateRandomStoreFile.java
@@ -81,7 +81,7 @@ public class CreateRandomStoreFile {
   /**
    * Runs the tools.
    * @param args command-line arguments
-   * @return true in case of success n
+   * @return true in case of success
    */
   public boolean run(String[] args) throws IOException {
     options.addOption(OUTPUT_DIR_OPTION, "output_dir", true, "Output directory");
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/DataBlockEncodingTool.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/DataBlockEncodingTool.java
index 16eaed33ac5..d7ce6f249f6 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/DataBlockEncodingTool.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/DataBlockEncodingTool.java
@@ -386,7 +386,7 @@ public class DataBlockEncodingTool {
    * @param name      Name of algorithm.
    * @param buffer    Buffer to be compressed.
    * @param offset    Position of the beginning of the data.
-   * @param length    Length of data in buffer. n
+   * @param length    Length of data in buffer.
    */
   public void benchmarkAlgorithm(Compression.Algorithm algorithm, String name, byte[] buffer,
     int offset, int length) throws IOException {
@@ -519,7 +519,7 @@ public class DataBlockEncodingTool {
   }
 
   /**
-   * Display statistics of different compression algorithms. n
+   * Display statistics of different compression algorithms.
    */
   public void displayStatistics() throws IOException {
     final String comprAlgo = compressionAlgorithmName.toUpperCase(Locale.ROOT);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
index 2fefa3a0201..6c1b380b786 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactingMemStore.java
@@ -152,7 +152,7 @@ public class TestCompactingMemStore extends TestDefaultMemStore {
   }
 
   /**
-   * A simple test which verifies the 3 possible states when scanning across snapshot. nn
+   * A simple test which verifies the 3 possible states when scanning across snapshot.
    */
   @Override
   @Test
@@ -194,7 +194,7 @@ public class TestCompactingMemStore extends TestDefaultMemStore {
   }
 
   /**
-   * Test memstore snapshots n
+   * Test memstore snapshots
    */
   @Override
   @Test
@@ -213,7 +213,7 @@ public class TestCompactingMemStore extends TestDefaultMemStore {
   //////////////////////////////////////////////////////////////////////////////
 
   /**
-   * Test getNextRow from memstore n
+   * Test getNextRow from memstore
    */
   @Override
   @Test
@@ -300,7 +300,7 @@ public class TestCompactingMemStore extends TestDefaultMemStore {
 
   /**
    * Add keyvalues with a fixed memstoreTs, and checks that memstore size is decreased as older
-   * keyvalues are deleted from the memstore. n
+   * keyvalues are deleted from the memstore.
    */
   @Override
   @Test
@@ -338,7 +338,7 @@ public class TestCompactingMemStore extends TestDefaultMemStore {
 
   /**
    * Tests that the timeOfOldestEdit is updated correctly for the various edit operations in
-   * memstore. n
+   * memstore.
    */
   @Override
   @Test
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompaction.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompaction.java
index 2f203d6857c..65a8c89283c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompaction.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompaction.java
@@ -148,7 +148,7 @@ public class TestCompaction {
   }
 
   /**
-   * Verify that you can stop a long-running compaction (used during RS shutdown) n
+   * Verify that you can stop a long-running compaction (used during RS shutdown)
    */
   @Test
   public void testInterruptCompaction() throws Exception {
@@ -706,7 +706,7 @@ public class TestCompaction {
    * We set compaction.kv.max to 10 so compaction will scan 10 versions each round, meanwhile we set
    * keepSeqIdPeriod=0 in {@link DummyCompactor} so all 10 versions of hfile2 will be written out
    * with seqId cleaned (set to 0) including cell-B, then when scanner goes to cell-A it will cause
-   * a scan out-of-order assertion error before HBASE-16931 n * if error occurs during the test
+   * a scan out-of-order assertion error before HBASE-16931 if error occurs during the test
    */
   @Test
   public void testCompactionSeqId() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionState.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionState.java
index 926794d9a86..ee8aa5d986f 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionState.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestCompactionState.java
@@ -146,8 +146,9 @@ public class TestCompactionState {
 
   /**
    * Load data to a table, flush it to disk, trigger compaction, confirm the compaction state is
-   * right and wait till it is done. nnn * @param singleFamily otherwise, run compaction on all cfs
-   * @param stateSource get the state by Admin or Master nn
+   * right and wait till it is done.
+   * @param singleFamily otherwise, run compaction on all cfs
+   * @param stateSource  get the state by Admin or Master
    */
   private void compaction(final String tableName, final int flushes,
     final CompactionState expectedState, boolean singleFamily, StateSource stateSource)
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDateTieredCompactionPolicy.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDateTieredCompactionPolicy.java
index f11a5fa66b3..475454d6763 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDateTieredCompactionPolicy.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDateTieredCompactionPolicy.java
@@ -242,7 +242,7 @@ public class TestDateTieredCompactionPolicy extends AbstractTestDateTieredCompac
 
   /**
    * Major Compaction to check min max timestamp falling in the same window and also to check
-   * boundary condition in which case binary sort gives insertion point as length of the array n
+   * boundary condition in which case binary sort gives insertion point as length of the array
    */
   @Test
   public void checkMinMaxTimestampSameBoundary() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java
index f997403864e..630ec364abf 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDefaultMemStore.java
@@ -157,7 +157,7 @@ public class TestDefaultMemStore {
   }
 
   /**
-   * Test memstore snapshot happening while scanning. n
+   * Test memstore snapshot happening while scanning.
    */
   @Test
   public void testScanAcrossSnapshot() throws IOException {
@@ -233,7 +233,7 @@ public class TestDefaultMemStore {
   }
 
   /**
-   * A simple test which verifies the 3 possible states when scanning across snapshot. nn
+   * A simple test which verifies the 3 possible states when scanning across snapshot.
    */
   @Test
   public void testScanAcrossSnapshot2() throws IOException, CloneNotSupportedException {
@@ -525,7 +525,7 @@ public class TestDefaultMemStore {
   }
 
   /**
-   * Test memstore snapshots n
+   * Test memstore snapshots
    */
   @Test
   public void testSnapshotting() throws IOException {
@@ -563,7 +563,7 @@ public class TestDefaultMemStore {
   //////////////////////////////////////////////////////////////////////////////
 
   /**
-   * Test getNextRow from memstore n
+   * Test getNextRow from memstore
    */
   @Test
   public void testGetNextRow() throws Exception {
@@ -813,7 +813,7 @@ public class TestDefaultMemStore {
 
   /**
    * Add keyvalues with a fixed memstoreTs, and checks that memstore size is decreased as older
-   * keyvalues are deleted from the memstore. n
+   * keyvalues are deleted from the memstore.
    */
   @Test
   public void testUpsertMemstoreSize() throws Exception {
@@ -857,7 +857,7 @@ public class TestDefaultMemStore {
 
   /**
    * Tests that the timeOfOldestEdit is updated correctly for the various edit operations in
-   * memstore. n
+   * memstore.
    */
   @Test
   public void testUpdateToTimeOfOldestEdit() throws Exception {
@@ -898,7 +898,7 @@ public class TestDefaultMemStore {
   /**
    * Tests the HRegion.shouldFlush method - adds an edit in the memstore and checks that shouldFlush
    * returns true, and another where it disables the periodic flush functionality and tests whether
-   * shouldFlush returns false. n
+   * shouldFlush returns false.
    */
   @Test
   public void testShouldFlush() throws Exception {
@@ -968,7 +968,7 @@ public class TestDefaultMemStore {
    * Inserts a new region's meta information into the passed <code>meta</code> region. Used by the
    * HMaster bootstrap code adding new table to hbase:meta table.
    * @param meta hbase:meta HRegion to be updated
-   * @param r    HRegion to add to <code>meta</code> n
+   * @param r    HRegion to add to <code>meta</code>
    */
   public static void addRegionToMETA(final HRegion meta, final HRegion r) throws IOException {
     meta.checkResources();
@@ -1000,7 +1000,7 @@ public class TestDefaultMemStore {
   /**
    * Adds {@link #ROW_COUNT} rows and {@link #QUALIFIER_COUNT}
    * @param hmc Instance to add rows to.
-   * @return How many rows we added. n
+   * @return How many rows we added.
    */
   protected int addRows(final AbstractMemStore hmc) {
     return addRows(hmc, HConstants.LATEST_TIMESTAMP);
@@ -1009,7 +1009,7 @@ public class TestDefaultMemStore {
   /**
    * Adds {@link #ROW_COUNT} rows and {@link #QUALIFIER_COUNT}
    * @param hmc Instance to add rows to.
-   * @return How many rows we added. n
+   * @return How many rows we added.
    */
   protected int addRows(final MemStore hmc, final long ts) {
     for (int i = 0; i < ROW_COUNT; i++) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDeleteMobTable.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDeleteMobTable.java
index 1a41bbc6e66..0af8e256156 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDeleteMobTable.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDeleteMobTable.java
@@ -71,7 +71,7 @@ public class TestDeleteMobTable {
   }
 
   /**
-   * Generate the mob value. n * the size of the value
+   * Generate the mob value. the size of the value
    * @return the mob value generated
    */
   private static byte[] generateMobValue(int size) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestGetClosestAtOrBefore.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestGetClosestAtOrBefore.java
index dce33add077..33c4b913163 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestGetClosestAtOrBefore.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestGetClosestAtOrBefore.java
@@ -161,8 +161,8 @@ public class TestGetClosestAtOrBefore {
   }
 
   /*
-   * nnn * @param answer Pass -1 if we're not to find anything.
-   * @return Row found. n
+   * @param answer Pass -1 if we're not to find anything.
+   * @return Row found.
    */
   private byte[] findRow(final Region mr, final char table, final int rowToFind, final int answer)
     throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHMobStore.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHMobStore.java
index ed5ae83822f..882cf4ab454 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHMobStore.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHMobStore.java
@@ -120,7 +120,7 @@ public class TestHMobStore {
   private final String DIR = TEST_UTIL.getDataTestDir("TestHMobStore").toString();
 
   /**
-   * Setup n
+   * Setup
    */
   @Before
   public void setUp() throws Exception {
@@ -204,7 +204,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Getting data from memstore n
+   * Getting data from memstore
    */
   @Test
   public void testGetFromMemStore() throws IOException {
@@ -237,7 +237,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Getting MOB data from files n
+   * Getting MOB data from files
    */
   @Test
   public void testGetFromFiles() throws IOException {
@@ -279,7 +279,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Getting the reference data from files n
+   * Getting the reference data from files
    */
   @Test
   public void testGetReferencesFromFiles() throws IOException {
@@ -323,7 +323,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Getting data from memstore and files n
+   * Getting data from memstore and files
    */
   @Test
   public void testGetFromMemStoreAndFiles() throws IOException {
@@ -365,7 +365,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Getting data from memstore and files n
+   * Getting data from memstore and files
    */
   @Test
   public void testMobCellSizeThreshold() throws IOException {
@@ -445,7 +445,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Flush the memstore nn
+   * Flush the memstore
    */
   private void flush(int storeFilesSize) throws IOException {
     this.store.snapshot();
@@ -455,7 +455,7 @@ public class TestHMobStore {
   }
 
   /**
-   * Flush the memstore nnn
+   * Flush the memstore
    */
   private static void flushStore(HMobStore store, long id) throws IOException {
     StoreFlushContext storeFlushCtx = store.createFlushContext(id, FlushLifeCycleTracker.DUMMY);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
index 823bdb539b5..32e97cc1fb5 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java
@@ -277,7 +277,7 @@ public class TestHRegion {
   }
 
   /**
-   * Test that I can use the max flushed sequence id after the close. n
+   * Test that I can use the max flushed sequence id after the close.
    */
   @Test
   public void testSequenceId() throws IOException {
@@ -311,7 +311,7 @@ public class TestHRegion {
    * starts a flush is ongoing, the first flush is skipped and only the second flush takes place.
    * However, two flushes are required in case previous flush fails and leaves some data in
    * snapshot. The bug could cause loss of data in current memstore. The fix is removing all
-   * conditions except abort check so we ensure 2 flushes for region close." n
+   * conditions except abort check so we ensure 2 flushes for region close."
    */
   @Test
   public void testCloseCarryingSnapshot() throws IOException {
@@ -484,7 +484,7 @@ public class TestHRegion {
    * proceed for a couple cycles, the size in current memstore could be much larger than the
    * snapshot. It's likely to drift memstoreSize much smaller than expected. In extreme case, if the
    * error accumulates to even bigger than HRegion's memstore size limit, any further flush is
-   * skipped because flush does not do anything if memstoreSize is not larger than 0." n
+   * skipped because flush does not do anything if memstoreSize is not larger than 0."
    */
   @Test
   public void testFlushSizeAccounting() throws Exception {
@@ -3736,7 +3736,7 @@ public class TestHRegion {
   }
 
   /**
-   * This method tests https://issues.apache.org/jira/browse/HBASE-2516. n
+   * This method tests https://issues.apache.org/jira/browse/HBASE-2516.
    */
   @Test
   public void testGetScanner_WithRegionClosed() throws IOException {
@@ -4394,7 +4394,7 @@ public class TestHRegion {
 
   /**
    * Write an HFile block full with Cells whose qualifier that are identical between 0 and
-   * Short.MAX_VALUE. See HBASE-13329. n
+   * Short.MAX_VALUE. See HBASE-13329.
    */
   @Test
   public void testLongQualifier() throws Exception {
@@ -4414,8 +4414,8 @@ public class TestHRegion {
 
   /**
    * Flushes the cache in a thread while scanning. The tests verify that the scan is coherent - e.g.
-   * the returned results are always of the same or later update as the previous results. n * scan /
-   * compact n * thread join
+   * the returned results are always of the same or later update as the previous results. scan /
+   * compact thread join
    */
   @Test
   public void testFlushCacheWhileScanning() throws IOException, InterruptedException {
@@ -4555,8 +4555,7 @@ public class TestHRegion {
 
   /**
    * Writes very wide records and scans for the latest every time.. Flushes and compacts the region
-   * every now and then to keep things realistic. n * by flush / scan / compaction n * when joining
-   * threads
+   * every now and then to keep things realistic. by flush / scan / compaction when joining threads
    */
   @Test
   public void testWritesWhileScanning() throws IOException, InterruptedException {
@@ -4725,7 +4724,7 @@ public class TestHRegion {
 
   /**
    * Writes very wide records and gets the latest row every time.. Flushes and compacts the region
-   * aggressivly to catch issues. n * by flush / scan / compaction n * when joining threads
+   * aggressivly to catch issues. by flush / scan / compaction when joining threads
    */
   @Test
   public void testWritesWhileGetting() throws Exception {
@@ -5093,7 +5092,7 @@ public class TestHRegion {
 
   /**
    * Testcase to check state of region initialization task set to ABORTED or not if any exceptions
-   * during initialization n
+   * during initialization
    */
   @Test
   public void testStatusSettingToAbortIfAnyExceptionDuringRegionInitilization() throws Exception {
@@ -5210,7 +5209,7 @@ public class TestHRegion {
   }
 
   /**
-   * Test case to check increment function with memstore flushing n
+   * Test case to check increment function with memstore flushing
    */
   @Test
   public void testParallelIncrementWithMemStoreFlush() throws Exception {
@@ -5295,7 +5294,7 @@ public class TestHRegion {
   }
 
   /**
-   * Test case to check append function with memstore flushing n
+   * Test case to check append function with memstore flushing
    */
   @Test
   public void testParallelAppendWithMemStoreFlush() throws Exception {
@@ -5353,7 +5352,7 @@ public class TestHRegion {
   }
 
   /**
-   * Test case to check put function with memstore flushing for same row, same ts n
+   * Test case to check put function with memstore flushing for same row, same ts
    */
   @Test
   public void testPutWithMemStoreFlush() throws Exception {
@@ -5723,7 +5722,7 @@ public class TestHRegion {
   }
 
   /*
-   * Assert first value in the passed region is <code>firstValue</code>. n * n * n * n
+   * Assert first value in the passed region is <code>firstValue</code>.
    */
   protected void assertScan(final HRegion r, final byte[] fs, final byte[] firstValue)
     throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
index dc118e189f8..eeb3e02d77e 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionReplayEvents.java
@@ -1136,7 +1136,7 @@ public class TestHRegionReplayEvents {
 
   /**
    * Tests that a region opened in secondary mode would not write region open / close events to its
-   * WAL. n
+   * WAL.
    */
   @Test
   public void testSecondaryRegionDoesNotWriteRegionEventsToWAL() throws IOException {
@@ -1647,7 +1647,7 @@ public class TestHRegionReplayEvents {
   /**
    * Puts a total of numRows + numRowsAfterFlush records indexed with numeric row keys. Does a flush
    * every flushInterval number of records. Then it puts numRowsAfterFlush number of more rows but
-   * does not execute flush after n
+   * does not execute flush after
    */
   private void putDataWithFlushes(HRegion region, int flushInterval, int numRows,
     int numRowsAfterFlush) throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
index de47aa3c475..78aa83737ae 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStore.java
@@ -795,7 +795,7 @@ public class TestHStore {
   }
 
   /**
-   * Test to ensure correctness when using Stores with multiple timestamps n
+   * Test to ensure correctness when using Stores with multiple timestamps
    */
   @Test
   public void testMultipleTimestamps() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStoreFile.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStoreFile.java
index 34a688283f9..b15aa63c8f0 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStoreFile.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestHStoreFile.java
@@ -145,7 +145,7 @@ public class TestHStoreFile extends HBaseTestCase {
   byte[] SPLITKEY = new byte[] { (LAST_CHAR + FIRST_CHAR) / 2, FIRST_CHAR };
 
   /*
-   * Writes HStoreKey and ImmutableBytes data to passed writer and then closes it. nn
+   * Writes HStoreKey and ImmutableBytes data to passed writer and then closes it.
    */
   public static void writeStoreFile(final StoreFileWriter writer, byte[] fam, byte[] qualifier)
     throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestJoinedScanners.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestJoinedScanners.java
index 725eb8ca1b8..9758f80e5af 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestJoinedScanners.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestJoinedScanners.java
@@ -192,7 +192,8 @@ public class TestJoinedScanners {
   private static Options options = new Options();
 
   /**
-   * Command line interface: n * @throws IOException if there is a bug while reading from disk
+   * Command line interface:
+   * @throws IOException if there is a bug while reading from disk
    */
   public static void main(final String[] args) throws Exception {
     Option encodingOption =
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMajorCompaction.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMajorCompaction.java
index 94e7e07c15d..9d8f5cfe42e 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMajorCompaction.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMajorCompaction.java
@@ -154,7 +154,7 @@ public class TestMajorCompaction {
   }
 
   /**
-   * Run compaction and flushing memstore Assert deletes get cleaned up. n
+   * Run compaction and flushing memstore Assert deletes get cleaned up.
    */
   @Test
   public void testMajorCompaction() throws Exception {
@@ -431,7 +431,7 @@ public class TestMajorCompaction {
   /**
    * Test that on a major compaction, if all cells are expired or deleted, then we'll end up with no
    * product. Make sure scanner over region returns right answer in this case - and that it just
-   * basically works. n
+   * basically works.
    */
   @Test
   public void testMajorCompactingToNoOutputWithReverseScan() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMasterAddressTracker.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMasterAddressTracker.java
index 7f7e9b101a6..345e5b48fd9 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMasterAddressTracker.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMasterAddressTracker.java
@@ -128,7 +128,7 @@ public class TestMasterAddressTracker {
 
   /**
    * Unit tests that uses ZooKeeper but does not use the master-side methods but rather acts
-   * directly on ZK. n
+   * directly on ZK.
    */
   @Test
   public void testMasterAddressTrackerFromZK() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
index c3e27450c4a..e9eec9e5352 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestPerColumnFamilyFlush.java
@@ -440,7 +440,7 @@ public class TestPerColumnFamilyFlush {
   /**
    * When a log roll is about to happen, we do a flush of the regions who will be affected by the
    * log roll. These flushes cannot be a selective flushes, otherwise we cannot roll the logs. This
-   * test ensures that we do a full-flush in that scenario. n
+   * test ensures that we do a full-flush in that scenario.
    */
   @Test
   public void testFlushingWhenLogRolling() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
index 7f7fd4d46f2..35e84a36aae 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRSKilledWhenInitializing.java
@@ -81,7 +81,7 @@ public class TestRSKilledWhenInitializing {
 
   /**
    * Test verifies whether a region server is removed from online servers list in master if it went
-   * down after registering with master. Test will TIMEOUT if an error!!!! n
+   * down after registering with master. Test will TIMEOUT if an error!!!!
    */
   @Test
   public void testRSTerminationAfterRegisteringToMasterBeforeCreatingEphemeralNode()
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionIncrement.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionIncrement.java
index 0a852d7f36c..26818faa6e2 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionIncrement.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionIncrement.java
@@ -171,7 +171,7 @@ public class TestRegionIncrement {
   }
 
   /**
-   * Have each thread update its own Cell. Avoid contention with another thread. nn
+   * Have each thread update its own Cell. Avoid contention with another thread.
    */
   @Test
   public void testUnContendedSingleCellIncrement() throws IOException, InterruptedException {
@@ -208,7 +208,7 @@ public class TestRegionIncrement {
   }
 
   /**
-   * Have each thread update its own Cell. Avoid contention with another thread. This is nn
+   * Have each thread update its own Cell. Avoid contention with another thread. This is
    */
   @Test
   public void testContendedAcrossCellsIncrement() throws IOException, InterruptedException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionReplicaFailover.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionReplicaFailover.java
index c8e119d0d73..b2c3389d477 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionReplicaFailover.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionReplicaFailover.java
@@ -124,7 +124,7 @@ public class TestRegionReplicaFailover {
 
   /**
    * Tests the case where if there is some data in the primary region, reopening the region replicas
-   * (enable/disable table, etc) makes the region replicas readable. n
+   * (enable/disable table, etc) makes the region replicas readable.
    */
   @Test
   public void testSecondaryRegionWithNonEmptyRegion() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerOnlineConfigChange.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerOnlineConfigChange.java
index 0f44ca092a0..d596e033131 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerOnlineConfigChange.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionServerOnlineConfigChange.java
@@ -99,7 +99,7 @@ public class TestRegionServerOnlineConfigChange {
   }
 
   /**
-   * Check if the number of compaction threads changes online n
+   * Check if the number of compaction threads changes online
    */
   @Test
   public void testNumCompactionThreadsOnlineChange() throws IOException {
@@ -116,7 +116,7 @@ public class TestRegionServerOnlineConfigChange {
   }
 
   /**
-   * Test that the configurations in the CompactionConfiguration class change properly. n
+   * Test that the configurations in the CompactionConfiguration class change properly.
    */
   @Test
   public void testCompactionConfigurationOnlineChange() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRequestsPerSecondMetric.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRequestsPerSecondMetric.java
index b64c39869e5..f68b58b5e48 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRequestsPerSecondMetric.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRequestsPerSecondMetric.java
@@ -69,7 +69,7 @@ public class TestRequestsPerSecondMetric {
    * count. Next, we disable a table and all of its 25 regions will be closed. As part of region
    * close, his metric will also be removed from metricCache. prior to HBASE-23237, we do not
    * remove/reset his metric so we incorrectly compute (currentRequestCount - lastRequestCount)
-   * which result into negative value. nn
+   * which result into negative value.
    */
   public void testNoNegativeSignAtRequestsPerSecond() throws IOException, InterruptedException {
     final TableName TABLENAME = TableName.valueOf("t");
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRowTooBig.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRowTooBig.java
index a83a38983dc..ade5a5be55b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRowTooBig.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRowTooBig.java
@@ -70,7 +70,7 @@ public class TestRowTooBig {
    * Usecase: - create a row with 5 large cells (5 Mb each) - flush memstore but don't compact
    * storefiles. - try to Get whole row. OOME happened before we actually get to reading results,
    * but during seeking, as each StoreFile gets it's own scanner, and each scanner seeks after the
-   * first KV. n
+   * first KV.
    */
   @Test(expected = RowTooBigException.class)
   public void testScannersSeekOnFewLargeCells() throws IOException {
@@ -109,7 +109,7 @@ public class TestRowTooBig {
 
   /**
    * Usecase: - create a row with 1M cells, 10 bytes in each - flush & run major compaction - try to
-   * Get whole row. OOME happened in StoreScanner.next(..). n
+   * Get whole row. OOME happened in StoreScanner.next(..).
    */
   @Test(expected = RowTooBigException.class)
   public void testScanAcrossManySmallColumns() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanner.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanner.java
index dee94d2a742..d6edb1cf7c4 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanner.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestScanner.java
@@ -542,7 +542,7 @@ public class TestScanner {
    * @param hri Region
    * @param flushIndex At what row we start the flush.
    * @param concurrent if the flush should be concurrent or sync.
-   * @return Count of rows found. n
+   * @return Count of rows found.
    */
   private int count(final Table countTable, final int flushIndex, boolean concurrent)
     throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransactionOnCluster.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransactionOnCluster.java
index f75bd92b90a..ab2c336f2e6 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransactionOnCluster.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransactionOnCluster.java
@@ -1009,8 +1009,7 @@ public class TestSplitTransactionOnCluster {
 
   /**
    * Ensure single table region is not on same server as the single hbase:meta table region.
-   * @return Index of the server hosting the single table region nn * @throws
-   *         org.apache.hadoop.hbase.ZooKeeperConnectionException n
+   * @return Index of the server hosting the single table region
    */
   private int ensureTableRegionNotOnSameServerAsMeta(final Admin admin, final RegionInfo hri)
     throws IOException, MasterNotRunningException, ZooKeeperConnectionException,
@@ -1059,8 +1058,8 @@ public class TestSplitTransactionOnCluster {
 
   /**
    * Find regionserver other than the one passed. Can't rely on indexes into list of regionservers
-   * since crashed servers occupy an index. nn * @return A regionserver that is not
-   * <code>notThisOne</code> or null if none found
+   * since crashed servers occupy an index.
+   * @return A regionserver that is not <code>notThisOne</code> or null if none found
    */
   private HRegionServer getOtherRegionServer(final MiniHBaseCluster cluster,
     final HRegionServer notThisOne) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java
index 30f7b7973d1..c0b537a41a7 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java
@@ -322,7 +322,7 @@ public class TestStoreScanner {
   }
 
   /*
-   * Test utility for building a NavigableSet for scanners. nn
+   * Test utility for building a NavigableSet for scanners.
    */
   NavigableSet<byte[]> getCols(String... strCols) {
     NavigableSet<byte[]> cols = new TreeSet<>(Bytes.BYTES_COMPARATOR);
@@ -549,7 +549,7 @@ public class TestStoreScanner {
   /*
    * Test test shows exactly how the matcher's return codes confuses the StoreScanner and prevent it
    * from doing the right thing. Seeking once, then nexting twice should return R1, then R2, but in
-   * this case it doesnt. TODO this comment makes no sense above. Appears to do the right thing. n
+   * this case it doesnt. TODO this comment makes no sense above. Appears to do the right thing.
    */
   @Test
   public void testWontNextToNext() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/querymatcher/TestUserScanQueryMatcher.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/querymatcher/TestUserScanQueryMatcher.java
index b783c294213..286b707ae8c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/querymatcher/TestUserScanQueryMatcher.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/querymatcher/TestUserScanQueryMatcher.java
@@ -54,7 +54,7 @@ public class TestUserScanQueryMatcher extends AbstractTestScanQueryMatcher {
 
   /**
    * This is a cryptic test. It is checking that we don't include a fake cell, one that has a
-   * timestamp of {@link HConstants#OLDEST_TIMESTAMP}. See HBASE-16074 for background. n
+   * timestamp of {@link HConstants#OLDEST_TIMESTAMP}. See HBASE-16074 for background.
    */
   @Test
   public void testNeverIncludeFakeCell() throws IOException {
@@ -162,7 +162,7 @@ public class TestUserScanQueryMatcher extends AbstractTestScanQueryMatcher {
   /**
    * Verify that {@link ScanQueryMatcher} only skips expired KeyValue instances and does not exit
    * early from the row (skipping later non-expired KeyValues). This version mimics a Get with
-   * explicitly specified column qualifiers. n
+   * explicitly specified column qualifiers.
    */
   @Test
   public void testMatch_ExpiredExplicit() throws IOException {
@@ -205,7 +205,7 @@ public class TestUserScanQueryMatcher extends AbstractTestScanQueryMatcher {
   /**
    * Verify that {@link ScanQueryMatcher} only skips expired KeyValue instances and does not exit
    * early from the row (skipping later non-expired KeyValues). This version mimics a Get with
-   * wildcard-inferred column qualifiers. n
+   * wildcard-inferred column qualifiers.
    */
   @Test
   public void testMatch_ExpiredWildcard() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestFSWAL.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestFSWAL.java
index b3d0b36cf9a..9a9f9ca48d5 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestFSWAL.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestFSWAL.java
@@ -202,7 +202,7 @@ public abstract class AbstractTestFSWAL {
 
   /**
    * tests the log comparator. Ensure that we are not mixing meta logs with non-meta logs (throws
-   * exception if we do). Comparison is based on the timestamp present in the wal name. n
+   * exception if we do). Comparison is based on the timestamp present in the wal name.
    */
   @Test
   public void testWALComparator() throws Exception {
@@ -259,7 +259,7 @@ public abstract class AbstractTestFSWAL {
    * <p>
    * This method tests this behavior by inserting edits and rolling the wal enough times to reach
    * the max number of logs threshold. It checks whether we get the "right regions and stores" for
-   * flush on rolling the wal. n
+   * flush on rolling the wal.
    */
   @Test
   public void testFindMemStoresEligibleForFlush() throws Exception {
@@ -403,8 +403,8 @@ public abstract class AbstractTestFSWAL {
    * Test flush for sure has a sequence id that is beyond the last edit appended. We do this by
    * slowing appends in the background ring buffer thread while in foreground we call flush. The
    * addition of the sync over HRegion in flush should fix an issue where flush was returning before
-   * all of its appends had made it out to the WAL (HBASE-11109). n * @see
-   * <a href="https://issues.apache.org/jira/browse/HBASE-11109">HBASE-11109</a>
+   * all of its appends had made it out to the WAL (HBASE-11109).
+   * @see <a href="https://issues.apache.org/jira/browse/HBASE-11109">HBASE-11109</a>
    */
   @Test
   public void testFlushSequenceIdIsGreaterThanAllEditsInHFile() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestProtobufLog.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestProtobufLog.java
index b5d856b9223..fac8970877b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestProtobufLog.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestProtobufLog.java
@@ -106,7 +106,7 @@ public abstract class AbstractTestProtobufLog<W extends Closeable> {
   }
 
   /**
-   * Reads the WAL with and without WALTrailer. n
+   * Reads the WAL with and without WALTrailer.
    */
   @Test
   public void testWALTrailer() throws IOException {
@@ -122,7 +122,7 @@ public abstract class AbstractTestProtobufLog<W extends Closeable> {
    *                    so that a trailer is appended to the WAL. Otherwise, it starts reading after
    *                    the sync call. This means that reader is not aware of the trailer. In this
    *                    scenario, if the reader tries to read the trailer in its next() call, it
-   *                    returns false from ProtoBufLogReader. n
+   *                    returns false from ProtoBufLogReader.
    */
   private void doRead(boolean withTrailer) throws IOException {
     final int columnCount = 5;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestWALReplay.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestWALReplay.java
index 9733a653a1a..ef927257343 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestWALReplay.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/AbstractTestWALReplay.java
@@ -180,8 +180,7 @@ public abstract class AbstractTestWALReplay {
   }
 
   /**
-   * n
-   */
+   *   */
   @Test
   public void testReplayEditsAfterRegionMovedWithMultiCF() throws Exception {
     final TableName tableName = TableName.valueOf("testReplayEditsAfterRegionMovedWithMultiCF");
@@ -257,8 +256,8 @@ public abstract class AbstractTestWALReplay {
   }
 
   /**
-   * Tests for hbase-2727. n * @see
-   * <a href="https://issues.apache.org/jira/browse/HBASE-2727">HBASE-2727</a>
+   * Tests for hbase-2727.
+   * @see <a href="https://issues.apache.org/jira/browse/HBASE-2727">HBASE-2727</a>
    */
   @Test
   public void test2727() throws Exception {
@@ -320,7 +319,6 @@ public abstract class AbstractTestWALReplay {
 
   /**
    * Test case of HRegion that is only made out of bulk loaded files. Assert that we don't 'crash'.
-   * nnnnn
    */
   @Test
   public void testRegionMadeOfBulkLoadedFilesOnly() throws IOException, SecurityException,
@@ -377,7 +375,7 @@ public abstract class AbstractTestWALReplay {
   /**
    * HRegion test case that is made of a major compacted HFile (created with three bulk loaded
    * files) and an edit in the memstore. This is for HBASE-10958 "[dataloss] Bulk loading with
-   * seqids can prevent some log entries from being replayed" nnnnn
+   * seqids can prevent some log entries from being replayed"
    */
   @Test
   public void testCompactedBulkLoadedFiles() throws IOException, SecurityException,
@@ -438,7 +436,7 @@ public abstract class AbstractTestWALReplay {
 
   /**
    * Test writing edits into an HRegion, closing it, splitting logs, opening Region again. Verify
-   * seqids. nnnnn
+   * seqids.
    */
   @Test
   public void testReplayEditsWrittenViaHRegion() throws IOException, SecurityException,
@@ -531,7 +529,7 @@ public abstract class AbstractTestWALReplay {
    * The way we get around this is by flushing at the region level, and then deleting the recently
    * flushed store file for one of the Stores. This would put us back in the situation where all but
    * that store got flushed and the region died. We restart Region again, and verify that the edits
-   * were replayed. nnnnn
+   * were replayed.
    */
   @Test
   public void testReplayEditsAfterPartialFlush() throws IOException, SecurityException,
@@ -612,7 +610,6 @@ public abstract class AbstractTestWALReplay {
   /**
    * Test that we could recover the data correctly after aborting flush. In the test, first we abort
    * flush after writing some data, then writing more data and flush again, at last verify the data.
-   * n
    */
   @Test
   public void testReplayEditsAfterAbortingFlush() throws IOException {
@@ -705,7 +702,7 @@ public abstract class AbstractTestWALReplay {
   }
 
   /**
-   * Create an HRegion with the result of a WAL split and test we only see the good edits n
+   * Create an HRegion with the result of a WAL split and test we only see the good edits
    */
   @Test
   public void testReplayEditsWrittenIntoWAL() throws Exception {
@@ -1141,7 +1138,8 @@ public abstract class AbstractTestWALReplay {
   }
 
   /*
-   * Run the split. Verify only single split file made. n * @return The single split file made n
+   * Run the split. Verify only single split file made.
+   * @return The single split file made
    */
   private Path runWALSplit(final Configuration c) throws IOException {
     List<Path> splits =
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
index 303f48c641b..dbc8a475466 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
@@ -422,7 +422,7 @@ public class TestLogRolling extends AbstractTestLogRolling {
   }
 
   /**
-   * Test that WAL is rolled when all data nodes in the pipeline have been restarted. n
+   * Test that WAL is rolled when all data nodes in the pipeline have been restarted.
    */
   @Test
   public void testLogRollOnPipelineRestart() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollingNoCluster.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollingNoCluster.java
index 0326032f1b4..edc6df40185 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollingNoCluster.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollingNoCluster.java
@@ -77,7 +77,7 @@ public class TestLogRollingNoCluster {
 
   /**
    * Spin up a bunch of threads and have them all append to a WAL. Roll the WAL frequently to try
-   * and trigger NPE. nn
+   * and trigger NPE.
    */
   @Test
   public void testContendedLogRolling() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationDisableInactivePeer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationDisableInactivePeer.java
index 8a73d4ace43..8c7da7e0900 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationDisableInactivePeer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationDisableInactivePeer.java
@@ -46,7 +46,7 @@ public class TestReplicationDisableInactivePeer extends TestReplicationBase {
   /**
    * Test disabling an inactive peer. Add a peer which is inactive, trying to insert, disable the
    * peer, then activate the peer and make sure nothing is replicated. In Addition, enable the peer
-   * and check the updates are replicated. n
+   * and check the updates are replicated.
    */
   @Test
   public void testDisableInactivePeer() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSink.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSink.java
index d887713cecf..fa7bef9fc4c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSink.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSink.java
@@ -156,7 +156,7 @@ public class TestReplicationSink {
   }
 
   /**
-   * Insert a whole batch of entries n
+   * Insert a whole batch of entries
    */
   @Test
   public void testBatchSink() throws Exception {
@@ -173,7 +173,7 @@ public class TestReplicationSink {
   }
 
   /**
-   * Insert a mix of puts and deletes n
+   * Insert a mix of puts and deletes
    */
   @Test
   public void testMixedPutDelete() throws Exception {
@@ -233,7 +233,7 @@ public class TestReplicationSink {
   }
 
   /**
-   * Insert to 2 different tables n
+   * Insert to 2 different tables
    */
   @Test
   public void testMixedPutTables() throws Exception {
@@ -257,7 +257,7 @@ public class TestReplicationSink {
   }
 
   /**
-   * Insert then do different types of deletes n
+   * Insert then do different types of deletes
    */
   @Test
   public void testMixedDeletes() throws Exception {
@@ -284,7 +284,7 @@ public class TestReplicationSink {
 
   /**
    * Puts are buffered, but this tests when a delete (not-buffered) is applied before the actual Put
-   * that creates it. n
+   * that creates it.
    */
   @Test
   public void testApplyDeleteBeforePut() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java
index 41d9a1f1b8b..02bd3f6fb9c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java
@@ -467,7 +467,7 @@ public abstract class TestReplicationSourceManager {
   /**
    * Test whether calling removePeer() on a ReplicationSourceManager that failed on initializing the
    * corresponding ReplicationSourceInterface correctly cleans up the corresponding replication
-   * queue and ReplicationPeer. See HBASE-16096. n
+   * queue and ReplicationPeer. See HBASE-16096.
    */
   @Test
   public void testPeerRemovalCleanup() throws Exception {
@@ -560,8 +560,8 @@ public abstract class TestReplicationSourceManager {
   }
 
   /**
-   * Add a peer and wait for it to initialize nn * @param waitForSource Whether to wait for
-   * replication source to initialize n
+   * Add a peer and wait for it to initialize
+   * @param waitForSource Whether to wait for replication source to initialize
    */
   private void addPeerAndWait(final String peerId, final ReplicationPeerConfig peerConfig,
     final boolean waitForSource) throws Exception {
@@ -599,7 +599,7 @@ public abstract class TestReplicationSourceManager {
   }
 
   /**
-   * Remove a peer and wait for it to get cleaned up nn
+   * Remove a peer and wait for it to get cleaned up
    */
   private void removePeerAndWait(final String peerId) throws Exception {
     final ReplicationPeers rp = manager.getReplicationPeers();
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestWALEntrySinkFilter.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestWALEntrySinkFilter.java
index 57646018bed..07bd1abb20b 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestWALEntrySinkFilter.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestWALEntrySinkFilter.java
@@ -117,7 +117,7 @@ public class TestWALEntrySinkFilter {
    * Test filter. Filter will filter out any write time that is <= 5 (BOUNDARY). We count how many
    * items we filter out and we count how many cells make it through for distribution way down below
    * in the Table#batch implementation. Puts in place a custom DevNullConnection so we can insert
-   * our counting Table. n
+   * our counting Table.
    */
   @Test
   public void testWALEntryFilter() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestSecureIPC.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestSecureIPC.java
index a7efe2b113e..4eb0d38d421 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestSecureIPC.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestSecureIPC.java
@@ -185,7 +185,7 @@ public class TestSecureIPC {
   }
 
   /**
-   * Test various combinations of Server and Client qops. n
+   * Test various combinations of Server and Client qops.
    */
   @Test
   public void testSaslWithCommonQop() throws Exception {
@@ -214,7 +214,7 @@ public class TestSecureIPC {
   }
 
   /**
-   * Test sasl encryption with Crypto AES. n
+   * Test sasl encryption with Crypto AES.
    */
   @Test
   public void testSaslWithCryptoAES() throws Exception {
@@ -224,7 +224,7 @@ public class TestSecureIPC {
   }
 
   /**
-   * Test various combinations of Server and Client configuration for Crypto AES. n
+   * Test various combinations of Server and Client configuration for Crypto AES.
    */
   @Test
   public void testDifferentConfWithCryptoAES() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestUsersOperationsWithSecureHadoop.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestUsersOperationsWithSecureHadoop.java
index c3f4495c48a..5f8f3515af8 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestUsersOperationsWithSecureHadoop.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/security/TestUsersOperationsWithSecureHadoop.java
@@ -88,7 +88,7 @@ public class TestUsersOperationsWithSecureHadoop {
    * <p>
    * <b> hbase.regionserver.kerberos.principal </b>
    * <p>
-   * <b> hbase.regionserver.keytab.file </b> n
+   * <b> hbase.regionserver.keytab.file </b>
    */
   @Test
   public void testUserLoginInSecureHadoop() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java
index b1688ad74b0..b6a869eadd3 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/MobSnapshotTestingUtils.java
@@ -82,7 +82,8 @@ public class MobSnapshotTestingUtils {
   }
 
   /**
-   * Create a Mob table. nnn * @return An Table instance for the created table. n
+   * Create a Mob table.
+   * @return An Table instance for the created table.
    */
   public static Table createMobTable(final HBaseTestingUtility util, final TableName tableName,
     final byte[]... families) throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/SnapshotTestingUtils.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/SnapshotTestingUtils.java
index dcfc8a04245..3d389e25e31 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/SnapshotTestingUtils.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/snapshot/SnapshotTestingUtils.java
@@ -94,7 +94,7 @@ public final class SnapshotTestingUtils {
   }
 
   /**
-   * Assert that we don't have any snapshots lists n * if the admin operation fails
+   * Assert that we don't have any snapshots lists if the admin operation fails
    */
   public static void assertNoSnapshots(Admin admin) throws IOException {
     assertEquals("Have some previous snapshots", 0, admin.listSnapshots().size());
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestLoadIncrementalHFilesSplitRecovery.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestLoadIncrementalHFilesSplitRecovery.java
index ca2f6dc41cb..e76f6ce5f16 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestLoadIncrementalHFilesSplitRecovery.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/tool/TestLoadIncrementalHFilesSplitRecovery.java
@@ -166,7 +166,7 @@ public class TestLoadIncrementalHFilesSplitRecovery {
 
   /**
    * Creates a table with given table name,specified number of column families<br>
-   * and splitkeys if the table does not already exist. nnn
+   * and splitkeys if the table does not already exist.
    */
   private void setupTableWithSplitkeys(TableName table, int cfs, byte[][] SPLIT_KEYS)
     throws IOException {
@@ -251,7 +251,6 @@ public class TestLoadIncrementalHFilesSplitRecovery {
 
   /**
    * Checks that all columns have the expected value and that there is the expected number of rows.
-   * n
    */
   void assertExpectedTable(TableName table, int count, int value) throws IOException {
     TableDescriptor htd = util.getAdmin().getDescriptor(table);
@@ -640,7 +639,6 @@ public class TestLoadIncrementalHFilesSplitRecovery {
 
   /**
    * Checks that all columns have the expected value and that there is the expected number of rows.
-   * n
    */
   void assertExpectedTable(final Connection connection, TableName table, int count, int value)
     throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/BaseTestHBaseFsck.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/BaseTestHBaseFsck.java
index 9a9d92f2dd5..17ed2a921b4 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/BaseTestHBaseFsck.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/BaseTestHBaseFsck.java
@@ -215,7 +215,7 @@ public class BaseTestHBaseFsck {
 
   /**
    * Setup a clean table before we start mucking with it. It will set tbl which needs to be closed
-   * after test nnn
+   * after test
    */
   void setupTable(TableName tablename) throws Exception {
     setupTableWithRegionReplica(tablename, 1);
@@ -223,7 +223,7 @@ public class BaseTestHBaseFsck {
 
   /**
    * Setup a clean table with a certain region_replica count It will set tbl which needs to be
-   * closed after test n
+   * closed after test
    */
   void setupTableWithRegionReplica(TableName tablename, int replicaCount) throws Exception {
     HTableDescriptor desc = new HTableDescriptor(tablename);
@@ -244,7 +244,7 @@ public class BaseTestHBaseFsck {
 
   /**
    * Setup a clean table with a mob-enabled column.
-   * @param tablename The name of a table to be created. n
+   * @param tablename The name of a table to be created.
    */
   void setupMobTable(TableName tablename) throws Exception {
     HTableDescriptor desc = new HTableDescriptor(tablename);
@@ -279,7 +279,7 @@ public class BaseTestHBaseFsck {
   }
 
   /**
-   * delete table in preparation for next test nn
+   * delete table in preparation for next test
    */
   void cleanupTable(TableName tablename) throws Exception {
     if (tbl != null) {
@@ -335,7 +335,8 @@ public class BaseTestHBaseFsck {
 
   /**
    * We don't have an easy way to verify that a flush completed, so we loop until we find a
-   * legitimate hfile and return it. nn * @return Path of a flushed hfile. n
+   * legitimate hfile and return it.
+   * @return Path of a flushed hfile.
    */
   Path getFlushedHFile(FileSystem fs, TableName table) throws IOException {
     Path tableDir = CommonFSUtils.getTableDir(CommonFSUtils.getRootDir(conf), table);
@@ -360,7 +361,7 @@ public class BaseTestHBaseFsck {
    * Gets flushed mob files.
    * @param fs    The current file system.
    * @param table The current table name.
-   * @return Path of a flushed hfile. n
+   * @return Path of a flushed hfile.
    */
   Path getFlushedMobFile(FileSystem fs, TableName table) throws IOException {
     Path famDir = MobUtils.getMobFamilyPath(conf, table, FAM_STR);
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/HFileArchiveTestingUtil.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/HFileArchiveTestingUtil.java
index 597091a126d..18286bca91c 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/HFileArchiveTestingUtil.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/HFileArchiveTestingUtil.java
@@ -85,7 +85,7 @@ public class HFileArchiveTestingUtil {
    * Compare the archived files to the files in the original directory
    * @param expected original files that should have been archived
    * @param actual   files that were archived
-   * @param fs       filessystem on which the archiving took place n
+   * @param fs       filessystem on which the archiving took place
    */
   public static void assertArchiveEqualToOriginal(FileStatus[] expected, FileStatus[] actual,
     FileSystem fs) throws IOException {
@@ -98,7 +98,7 @@ public class HFileArchiveTestingUtil {
    * @param actual         files that were archived
    * @param fs             {@link FileSystem} on which the archiving took place
    * @param hasTimedBackup <tt>true</tt> if we expect to find an archive backup directory with a
-   *                       copy of the files in the archive directory (and the original files). n
+   *                       copy of the files in the archive directory (and the original files).
    */
   public static void assertArchiveEqualToOriginal(FileStatus[] expected, FileStatus[] actual,
     FileSystem fs, boolean hasTimedBackup) throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MockServer.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MockServer.java
index 8662aa9b33d..a31fcbe6a94 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MockServer.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/MockServer.java
@@ -57,7 +57,7 @@ public class MockServer implements Server {
 
   /**
    * @param htu Testing utility to use
-   * @param zkw If true, create a zkw. nn
+   * @param zkw If true, create a zkw.
    */
   public MockServer(final HBaseTestingUtility htu, final boolean zkw)
     throws ZooKeeperConnectionException, IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/ProcessBasedLocalHBaseCluster.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/ProcessBasedLocalHBaseCluster.java
index 274fa6e8f00..21c49e61bad 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/ProcessBasedLocalHBaseCluster.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/ProcessBasedLocalHBaseCluster.java
@@ -122,7 +122,7 @@ public class ProcessBasedLocalHBaseCluster {
 
   /**
    * Makes this local HBase cluster use a mini-DFS cluster. Must be called before
-   * {@link #startHBase()}. n
+   * {@link #startHBase()}.
    */
   public void startMiniDFS() throws Exception {
     if (testUtil == null) {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestFSUtils.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestFSUtils.java
index fc7bc1befd3..f115ea4cf32 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestFSUtils.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestFSUtils.java
@@ -474,7 +474,7 @@ public class TestFSUtils {
 
   /**
    * Ugly test that ensures we can get at the hedged read counters in dfsclient. Does a bit of
-   * preading with hedged reads enabled using code taken from hdfs TestPread. n
+   * preading with hedged reads enabled using code taken from hdfs TestPread.
    */
   @Test
   public void testDFSHedgedReadMetrics() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/HbckTestingUtil.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/HbckTestingUtil.java
index efca6564660..41e98464bfd 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/HbckTestingUtil.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/hbck/HbckTestingUtil.java
@@ -80,7 +80,7 @@ public class HbckTestingUtil {
 
   /**
    * Runs hbck with the -sidelineCorruptHFiles option
-   * @param table table constraint n
+   * @param table table constraint
    */
   public static HBaseFsck doHFileQuarantine(Configuration conf, TableName table) throws Exception {
     String[] args =
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/test/LoadTestDataGenerator.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/test/LoadTestDataGenerator.java
index e7283d2d9aa..ec7a5f11e40 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/util/test/LoadTestDataGenerator.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/util/test/LoadTestDataGenerator.java
@@ -82,7 +82,7 @@ public abstract class LoadTestDataGenerator {
   }
 
   /**
-   * initialize the LoadTestDataGenerator n * init args
+   * initialize the LoadTestDataGenerator init args
    */
   public void initialize(String[] args) {
     this.args = args;
@@ -140,16 +140,16 @@ public abstract class LoadTestDataGenerator {
   public abstract boolean verify(byte[] rowKey, byte[] cf, byte[] column, byte[] value);
 
   /**
-   * Giving a chance for the LoadTestDataGenerator to change the Mutation load. nn * @return updated
-   * Mutation n
+   * Giving a chance for the LoadTestDataGenerator to change the Mutation load.
+   * @return updated Mutation
    */
   public Mutation beforeMutate(long rowkeyBase, Mutation m) throws IOException {
     return m;
   }
 
   /**
-   * Giving a chance for the LoadTestDataGenerator to change the Get load. nn * @return updated Get
-   * n
+   * Giving a chance for the LoadTestDataGenerator to change the Get load.
+   * @return updated Get
    */
   public Get beforeGet(long rowkeyBase, Get get) throws IOException {
     return get;
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/IOTestProvider.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/IOTestProvider.java
index f59a8b12b61..796b0d5b8be 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/IOTestProvider.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/IOTestProvider.java
@@ -179,7 +179,7 @@ public class IOTestProvider implements WALProvider {
      * @param prefix          should always be hostname and port in distributed env and it will be
      *                        URL encoded before being used. If prefix is null, "wal" will be used
      * @param suffix          will be url encoded. null is treated as empty. non-empty must start
-     *                        with {@link AbstractFSWALProvider#WAL_FILE_NAME_DELIMITER} n
+     *                        with {@link AbstractFSWALProvider#WAL_FILE_NAME_DELIMITER}
      */
     public IOTestWAL(final FileSystem fs, final Path rootDir, final String logDir,
       final String archiveDir, final Configuration conf, final List<WALActionsListener> listeners,
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestFSHLogProvider.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestFSHLogProvider.java
index b095b520d58..3984e57263e 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestFSHLogProvider.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestFSHLogProvider.java
@@ -160,7 +160,7 @@ public class TestFSHLogProvider {
   }
 
   /**
-   * used by TestDefaultWALProviderWithHLogKey n
+   * used by TestDefaultWALProviderWithHLogKey
    */
   WALKeyImpl getWalKey(final byte[] info, final TableName tableName, final long timestamp,
     NavigableMap<byte[], Integer> scopes) {
@@ -168,7 +168,7 @@ public class TestFSHLogProvider {
   }
 
   /**
-   * helper method to simulate region flush for a WAL. nn
+   * helper method to simulate region flush for a WAL.
    */
   protected void flushRegion(WAL wal, byte[] regionEncodedName, Set<byte[]> flushedFamilyNames) {
     wal.startCacheFlush(regionEncodedName, flushedFamilyNames);
@@ -253,7 +253,6 @@ public class TestFSHLogProvider {
    * eligible for archiving if for all the regions which have entries in that wal file, have flushed
    * - past their maximum sequence id in that wal file.
    * <p>
-   * n
    */
   @Test
   public void testWALArchiving() throws IOException {
@@ -328,7 +327,7 @@ public class TestFSHLogProvider {
   }
 
   /**
-   * Write to a log file with three concurrent threads and verifying all data is written. n
+   * Write to a log file with three concurrent threads and verifying all data is written.
    */
   @Test
   public void testConcurrentWrites() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALFactory.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALFactory.java
index b40965365cf..be894bf02f3 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALFactory.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALFactory.java
@@ -174,7 +174,7 @@ public class TestWALFactory {
   }
 
   /**
-   * Just write multiple logs then split. Before fix for HADOOP-2283, this would fail. n
+   * Just write multiple logs then split. Before fix for HADOOP-2283, this would fail.
    */
   @Test
   public void testSplit() throws IOException {
@@ -229,7 +229,7 @@ public class TestWALFactory {
   }
 
   /**
-   * Test new HDFS-265 sync. n
+   * Test new HDFS-265 sync.
    */
   @Test
   public void Broken_testSync() throws Exception {
@@ -602,7 +602,7 @@ public class TestWALFactory {
   }
 
   /**
-   * Test that we can visit entries before they are appended n
+   * Test that we can visit entries before they are appended
    */
   @Test
   public void testVisitors() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALMethods.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALMethods.java
index a018b05d787..0cab305e9f5 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALMethods.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALMethods.java
@@ -78,7 +78,7 @@ public class TestWALMethods {
 
   /**
    * Assert that getSplitEditFilesSorted returns files in expected order and that it skips
-   * moved-aside files. n
+   * moved-aside files.
    */
   @Test
   public void testGetSplitEditFilesSorted() throws IOException {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALOpenAfterDNRollingStart.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALOpenAfterDNRollingStart.java
index 08c41a4fd59..3067164221f 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALOpenAfterDNRollingStart.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALOpenAfterDNRollingStart.java
@@ -98,7 +98,7 @@ public class TestWALOpenAfterDNRollingStart {
    * all datanode restarted (rolling upgrade, for example). Before this patch, low replication
    * detection is only used when syncing wal. But if the wal haven't had any entry whiten, it will
    * never know all the replica of the wal is broken(because of dn restarting). And this wal can
-   * never be open n
+   * never be open
    */
   @Test
   public void test() throws Exception {
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplit.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplit.java
index 904f261a806..752b617e870 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplit.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplit.java
@@ -955,8 +955,8 @@ public class TestWALSplit {
   /**
    * Sets up a log splitter with a mock reader and writer. The mock reader generates a specified
    * number of edits spread across 5 regions. The mock writer optionally sleeps for each edit it is
-   * fed. * After the split is complete, verifies that the statistics show the correct number of
-   * edits output into each region.
+   * fed. After the split is complete, verifies that the statistics show the correct number of edits
+   * output into each region.
    * @param numFakeEdits   number of fake edits to push through pipeline
    * @param bufferSize     size of in-memory buffer
    * @param writerSlowness writer threads will sleep this many ms per edit
diff --git a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
index 6a8ea50c3f0..427a34973b4 100644
--- a/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
+++ b/hbase-server/src/test/java/org/apache/hadoop/hbase/wal/WALPerformanceEvaluation.java
@@ -404,7 +404,8 @@ public final class WALPerformanceEvaluation extends Configured implements Tool {
 
   /**
    * Verify the content of the WAL file. Verify that the file has expected number of edits.
-   * @param wals may not be null n * @return Count of edits. n
+   * @param wals may not be null
+   * @return Count of edits.
    */
   private long verify(final WALFactory wals, final Path wal, final boolean verbose)
     throws IOException {
@@ -568,7 +569,7 @@ public final class WALPerformanceEvaluation extends Configured implements Tool {
 
   /**
    * The guts of the {@link #main} method. Call this method to avoid the {@link #main(String[])}
-   * System.exit. nnn
+   * System.exit.
    */
   static int innerMain(final Configuration c, final String[] args) throws Exception {
     return ToolRunner.run(c, new WALPerformanceEvaluation(), args);
diff --git a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/HBaseServiceHandler.java b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/HBaseServiceHandler.java
index 93468dc4a43..79f5d4ee830 100644
--- a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/HBaseServiceHandler.java
+++ b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/HBaseServiceHandler.java
@@ -66,7 +66,7 @@ public abstract class HBaseServiceHandler {
   }
 
   /**
-   * Creates and returns a Table instance from a given table name. n * name of table
+   * Creates and returns a Table instance from a given table name. name of table
    * @return Table object
    * @throws IOException if getting the table fails
    */
diff --git a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/IncrementCoalescer.java b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/IncrementCoalescer.java
index faac79ed8da..ba06eca9834 100644
--- a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/IncrementCoalescer.java
+++ b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/IncrementCoalescer.java
@@ -262,7 +262,7 @@ public class IncrementCoalescer implements IncrementCoalescerMBean {
 
   /**
    * This method samples the incoming requests and, if selected, will check if the corePoolSize
-   * should be changed. n
+   * should be changed.
    */
   private void dynamicallySetCoreSize(int countersMapSize) {
     // Here we are using countersMapSize as a random number, meaning this
diff --git a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHBaseServiceHandler.java b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHBaseServiceHandler.java
index 61d4e4bd1dc..a0b174e8329 100644
--- a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHBaseServiceHandler.java
+++ b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftHBaseServiceHandler.java
@@ -107,7 +107,7 @@ public class ThriftHBaseServiceHandler extends HBaseServiceHandler implements Hb
 
   /**
    * Returns a list of all the column families for a given Table.
-   * @param table table n
+   * @param table table
    */
   byte[][] getAllColumns(Table table) throws IOException {
     HColumnDescriptor[] cds = table.getTableDescriptor().getColumnFamilies();
diff --git a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftUtilities.java b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftUtilities.java
index 9abea1aa321..7a729dae0e9 100644
--- a/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftUtilities.java
+++ b/hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/ThriftUtilities.java
@@ -48,7 +48,9 @@ public class ThriftUtilities {
 
   /**
    * This utility method creates a new Hbase HColumnDescriptor object based on a Thrift
-   * ColumnDescriptor "struct". n * Thrift ColumnDescriptor object nn
+   * ColumnDescriptor "struct".
+   * @param in Thrift ColumnDescriptor object
+   * @throws IllegalArgument if the column name is empty
    */
   static public HColumnDescriptor colDescFromThrift(ColumnDescriptor in) throws IllegalArgument {
     Compression.Algorithm comp =
@@ -67,7 +69,7 @@ public class ThriftUtilities {
 
   /**
    * This utility method creates a new Thrift ColumnDescriptor "struct" based on an Hbase
-   * HColumnDescriptor object. n * Hbase HColumnDescriptor object
+   * HColumnDescriptor object. Hbase HColumnDescriptor object
    * @return Thrift ColumnDescriptor
    */
   static public ColumnDescriptor colDescFromHbase(HColumnDescriptor in) {
@@ -84,7 +86,7 @@ public class ThriftUtilities {
 
   /**
    * This utility method creates a list of Thrift TCell "struct" based on an Hbase Cell object. The
-   * empty list is returned if the input is null. n * Hbase Cell object
+   * empty list is returned if the input is null. Hbase Cell object
    * @return Thrift TCell array
    */
   static public List<TCell> cellFromHBase(Cell in) {
@@ -116,10 +118,10 @@ public class ThriftUtilities {
 
   /**
    * This utility method creates a list of Thrift TRowResult "struct" based on an Hbase RowResult
-   * object. The empty list is returned if the input is null. n * Hbase RowResult object n * This
-   * boolean dictates if row data is returned in a sorted order sortColumns = True will set
-   * TRowResult's sortedColumns member which is an ArrayList of TColumn struct sortColumns = False
-   * will set TRowResult's columns member which is a map of columnName and TCell struct
+   * object. The empty list is returned if the input is null. Hbase RowResult object This boolean
+   * dictates if row data is returned in a sorted order sortColumns = True will set TRowResult's
+   * sortedColumns member which is an ArrayList of TColumn struct sortColumns = False will set
+   * TRowResult's columns member which is a map of columnName and TCell struct
    * @return Thrift TRowResult array
    */
   static public List<TRowResult> rowResultFromHBase(Result[] in, boolean sortColumns) {
@@ -154,8 +156,8 @@ public class ThriftUtilities {
 
   /**
    * This utility method creates a list of Thrift TRowResult "struct" based on an array of Hbase
-   * RowResult objects. The empty list is returned if the input is null. n * Array of Hbase
-   * RowResult objects
+   * RowResult objects. The empty list is returned if the input is null. Array of Hbase RowResult
+   * objects
    * @return Thrift TRowResult array
    */
   static public List<TRowResult> rowResultFromHBase(Result[] in) {
diff --git a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
index 2574391ed87..59a9e363211 100644
--- a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
+++ b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift/TestThriftServer.java
@@ -138,7 +138,7 @@ public class TestThriftServer {
   /**
    * Runs all of the tests under a single JUnit test method. We consolidate all testing to one
    * method because HBaseClusterTestCase is prone to OutOfMemoryExceptions when there are three or
-   * more JUnit test methods. n
+   * more JUnit test methods.
    */
   @Test
   public void testAll() throws Exception {
@@ -158,7 +158,7 @@ public class TestThriftServer {
 
   /**
    * Tests for creating, enabling, disabling, and deleting tables. Also tests that creating a table
-   * with an invalid column name yields an IllegalArgument exception. n
+   * with an invalid column name yields an IllegalArgument exception.
    */
   public void doTestTableCreateDrop() throws Exception {
     ThriftHBaseServiceHandler handler = new ThriftHBaseServiceHandler(UTIL.getConfiguration(),
@@ -188,7 +188,7 @@ public class TestThriftServer {
   /**
    * TODO: These counts are supposed to be zero but sometimes they are not, they are equal to the
    * passed in maybe. Investigate why. My guess is they are set by the test that runs just previous
-   * to this one. Sometimes they are cleared. Sometimes not. nnnn
+   * to this one. Sometimes they are cleared. Sometimes not.
    */
   private int getCurrentCount(final String name, final int maybe, final ThriftMetrics metrics) {
     int currentCount = 0;
@@ -320,7 +320,7 @@ public class TestThriftServer {
 
   /**
    * Tests adding a series of Mutations and BatchMutations, including a delete mutation. Also tests
-   * data retrieval, and getting back multiple versions. n
+   * data retrieval, and getting back multiple versions.
    */
   public void doTestTableMutations() throws Exception {
     ThriftHBaseServiceHandler handler = new ThriftHBaseServiceHandler(UTIL.getConfiguration(),
@@ -392,7 +392,7 @@ public class TestThriftServer {
 
   /**
    * Similar to testTableMutations(), except Mutations are applied with specific timestamps and data
-   * retrieval uses these timestamps to extract specific versions of data. n
+   * retrieval uses these timestamps to extract specific versions of data.
    */
   public void doTestTableTimestampsAndColumns() throws Exception {
     // Setup
@@ -469,7 +469,7 @@ public class TestThriftServer {
 
   /**
    * Tests the four different scanner-opening methods (with and without a stoprow, with and without
-   * a timestamp). n
+   * a timestamp).
    */
   public void doTestTableScanners() throws Exception {
     // Setup
@@ -587,7 +587,7 @@ public class TestThriftServer {
   }
 
   /**
-   * For HBASE-2556 Tests for GetTableRegions n
+   * For HBASE-2556 Tests for GetTableRegions
    */
   public void doTestGetTableRegions() throws Exception {
     ThriftHBaseServiceHandler handler = new ThriftHBaseServiceHandler(UTIL.getConfiguration(),
@@ -646,7 +646,7 @@ public class TestThriftServer {
   }
 
   /**
-   * Appends the value to a cell and checks that the cell value is updated properly. n
+   * Appends the value to a cell and checks that the cell value is updated properly.
    */
   public static void doTestAppend() throws Exception {
     ThriftHBaseServiceHandler handler = new ThriftHBaseServiceHandler(UTIL.getConfiguration(),
@@ -677,7 +677,7 @@ public class TestThriftServer {
 
   /**
    * Check that checkAndPut fails if the cell does not exist, then put in the cell, then check that
-   * the checkAndPut succeeds. n
+   * the checkAndPut succeeds.
    */
   public static void doTestCheckAndPut() throws Exception {
     ThriftHBaseServiceHandler handler = new ThriftHBaseServiceHandler(UTIL.getConfiguration(),
@@ -869,7 +869,7 @@ public class TestThriftServer {
   /**
    * Asserts that the passed scanner is exhausted, and then closes the scanner.
    * @param scannerId the scanner to close
-   * @param handler   the HBaseServiceHandler interfacing to HBase n
+   * @param handler   the HBaseServiceHandler interfacing to HBase
    */
   private void closeScanner(int scannerId, ThriftHBaseServiceHandler handler) throws Exception {
     handler.scannerGet(scannerId);
diff --git a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThriftHBaseServiceHandlerWithLabels.java b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThriftHBaseServiceHandlerWithLabels.java
index b07141cb52d..505295d7700 100644
--- a/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThriftHBaseServiceHandlerWithLabels.java
+++ b/hbase-thrift/src/test/java/org/apache/hadoop/hbase/thrift2/TestThriftHBaseServiceHandlerWithLabels.java
@@ -439,8 +439,9 @@ public class TestThriftHBaseServiceHandlerWithLabels {
   }
 
   /**
-   * Padding numbers to make comparison of sort order easier in a for loop n * The number to pad. n
-   * * The length to pad up to.
+   * Padding numbers to make comparison of sort order easier in a for loop The number to pad.
+   * @param n   The number to pad.
+   * @param pad The length to pad up to.
    * @return The padded number as a string.
    */
   private String pad(int n, byte pad) {
diff --git a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java
index 9c186594fcd..e287e4237c6 100644
--- a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java
+++ b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MetaTableLocator.java
@@ -258,8 +258,8 @@ public final class MetaTableLocator {
    * Load the meta region state from the meta region server ZNode.
    * @param zkw       reference to the {@link ZKWatcher} which also contains configuration and
    *                  operation
-   * @param replicaId the ID of the replica n * @throws KeeperException if a ZooKeeper operation
-   *                  fails
+   * @param replicaId the ID of the replica
+   * @throws KeeperException if a ZooKeeper operation fails
    */
   public static RegionState getMetaRegionState(ZKWatcher zkw, int replicaId)
     throws KeeperException {
diff --git a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
index 80a4022bd5d..8e455d052bd 100644
--- a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
+++ b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/RecoverableZooKeeper.java
@@ -318,7 +318,7 @@ public class RecoverableZooKeeper {
   }
 
   /**
-   * getData is an idempotent operation. Retry before throwing exception n
+   * getData is an idempotent operation. Retry before throwing exception
    */
   public byte[] getData(String path, Watcher watcher, Stat stat)
     throws KeeperException, InterruptedException {
@@ -347,7 +347,7 @@ public class RecoverableZooKeeper {
   }
 
   /**
-   * getData is an idempotent operation. Retry before throwing exception n
+   * getData is an idempotent operation. Retry before throwing exception
    */
   public byte[] getData(String path, boolean watch, Stat stat)
     throws KeeperException, InterruptedException {
@@ -494,7 +494,6 @@ public class RecoverableZooKeeper {
    * But SEQUENTIAL is NOT idempotent operation. It is necessary to add identifier to the path to
    * verify, whether the previous one is successful or not.
    * </p>
-   * n
    */
   public String create(String path, byte[] data, List<ACL> acl, CreateMode createMode)
     throws KeeperException, InterruptedException {
diff --git a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
index 31b3985afdf..cd9d829b60c 100644
--- a/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
+++ b/hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/ZKUtil.java
@@ -962,12 +962,11 @@ public final class ZKUtil {
    * <li>runSequentialOnMultiFailure is true
    * </ul>
    * on calling multi, we get a ZooKeeper exception that can be handled by a sequential call(*), we
-   * retry the operations one-by-one (sequentially). n * - zk reference n * - if true when we get a
-   * ZooKeeper exception that could retry the operations one-by-one (sequentially) n * - path of the
+   * retry the operations one-by-one (sequentially). - zk reference - if true when we get a
+   * ZooKeeper exception that could retry the operations one-by-one (sequentially) - path of the
    * parent node(s)
-   * @throws KeeperException.NotEmptyException if node has children while deleting n * if unexpected
-   *                                           ZooKeeper exception n * if an invalid path is
-   *                                           specified
+   * @throws KeeperException.NotEmptyException if node has children while deleting if unexpected
+   *                                           ZooKeeper exception if an invalid path is specified
    */
   public static void deleteChildrenRecursivelyMultiOrSequential(ZKWatcher zkw,
     boolean runSequentialOnMultiFailure, String... pathRoots) throws KeeperException {
@@ -998,12 +997,11 @@ public final class ZKUtil {
    * <li>runSequentialOnMultiFailure is true
    * </ul>
    * on calling multi, we get a ZooKeeper exception that can be handled by a sequential call(*), we
-   * retry the operations one-by-one (sequentially). n * - zk reference n * - if true when we get a
-   * ZooKeeper exception that could retry the operations one-by-one (sequentially) n * - path of the
+   * retry the operations one-by-one (sequentially). - zk reference - if true when we get a
+   * ZooKeeper exception that could retry the operations one-by-one (sequentially) - path of the
    * parent node(s)
-   * @throws KeeperException.NotEmptyException if node has children while deleting n * if unexpected
-   *                                           ZooKeeper exception n * if an invalid path is
-   *                                           specified
+   * @throws KeeperException.NotEmptyException if node has children while deleting if unexpected
+   *                                           ZooKeeper exception if an invalid path is specified
    */
   public static void deleteNodeRecursivelyMultiOrSequential(ZKWatcher zkw,
     boolean runSequentialOnMultiFailure, String... pathRoots) throws KeeperException {
@@ -1094,9 +1092,9 @@ public final class ZKUtil {
 
   /**
    * BFS Traversal of all the children under path, with the entries in the list, in the same order
-   * as that of the traversal. Lists all the children without setting any watches. n * - zk
-   * reference n * - path of node
-   * @return list of children znodes under the path n * if unexpected ZooKeeper exception
+   * as that of the traversal. Lists all the children without setting any watches. - zk reference -
+   * path of node
+   * @return list of children znodes under the path if unexpected ZooKeeper exception
    */
   private static List<String> listChildrenBFSNoWatch(ZKWatcher zkw, final String znode)
     throws KeeperException {
@@ -1123,9 +1121,9 @@ public final class ZKUtil {
 
   /**
    * BFS Traversal of all the children under path, with the entries in the list, in the same order
-   * as that of the traversal. Lists all the children and set watches on to them. n * - zk reference
-   * n * - path of node
-   * @return list of children znodes under the path n * if unexpected ZooKeeper exception
+   * as that of the traversal. Lists all the children and set watches on to them. - zk reference -
+   * path of node
+   * @return list of children znodes under the path if unexpected ZooKeeper exception
    */
   private static List<String> listChildrenBFSAndWatchThem(ZKWatcher zkw, final String znode)
     throws KeeperException {