hbase/CHANGES.md

HBASE Changelog

Release 2.5.5 - 2023-06-09

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-27876	Only generate SBOM when releasing	Minor	build, pom
HBASE-27848	Should fast-fail if unmatched column family exists when using ImportTsv	Major	mapreduce
HBASE-27870	Eliminate the 'WARNING: package jdk.internal.util.random not in java.base' when running UTs with jdk11	Major	build, pom, test
HBASE-27858	Update surefire version to 3.0.0 and use the SurefireForkNodeFactory	Minor	test
HBASE-27844	changed type names to avoid conflicts with built-in types	Minor	build
HBASE-27838	Update zstd-jni from version 1.5.4-2 -> 1.5.5-2	Minor	io
HBASE-27799	RpcThrottlingException wait interval message is misleading between 0-1s	Major	.
HBASE-27821	Split TestFuzzyRowFilterEndToEnd	Major	test
HBASE-27792	Guard Master/RS Dump Servlet behind admin walls	Minor	security, UI
HBASE-27819	10k RpcServer.MAX_REQUEST_SIZE is not enough in ReplicationDroppedTable related tests	Major	test
HBASE-27808	Change flatten mode for oss in our pom file	Major	community, pom
HBASE-27818	Split TestReplicationDroppedTables	Major	Replication, test
HBASE-27789	Backport "HBASE-24914 Remove duplicate code appearing continuously in method ReplicationPeerManager.updatePeerConfig" to branch-2	Minor	Replication
HBASE-27422	Support replication for hbase:acl	Major	acl, Replication
HBASE-27713	Remove numRegions in Region Metrics	Major	metrics

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-27793	Make HBCK be able to report unknown servers	Major	hbck
HBASE-27872	xerial's snappy-java requires GLIBC >= 2.32	Minor	.
HBASE-27867	Close the L1 victim handler race	Minor	BlockCache
HBASE-27277	TestRaceBetweenSCPAndTRSP fails in pre commit	Major	proc-v2, test
HBASE-27874	Problem in flakey generated report causes pre-commit run to fail	Major	build
HBASE-27865	TestThriftServerCmdLine fails with org.apache.hadoop.hbase.SystemExitRule$SystemExitInTestException	Major	test, Thrift
HBASE-27860	Fix build error against Hadoop 3.3.5	Major	build, hadoop3
HBASE-27857	HBaseClassTestRule: system exit not restored if test times out may cause test to hang	Minor	test
HBASE-26646	WALPlayer should obtain token from filesystem	Minor	.
HBASE-27824	NPE in MetricsMasterWrapperImpl.isRunning	Major	test
HBASE-27823	NPE in ClaimReplicationQueuesProcedure when running TestAssignmentManager.testAssignSocketTimeout	Major	test
HBASE-27822	TestFromClientSide5.testAppendWithoutWAL is flaky	Major	scan, test
HBASE-27810	HBCK throws RejectedExecutionException when closing ZooKeeper resources	Major	hbck
HBASE-27807	PressureAwareCompactionThroughputController#tune log the opposite of the actual scenario	Trivial	Compaction
HBASE-27796	Improve MemcachedBlockCache	Major	.
HBASE-27768	Race conditions in BlockingRpcConnection	Major	.
HBASE-27778	Incorrect ReplicationSourceWALReader. totalBufferUsed may cause replication hang up	Major	Replication

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-27843	If moveAndClose fails HFileArchiver should delete any incomplete archive side changes	Major	.
HBASE-20804	Document and add tests for HBaseConfTool	Major	documentation, tooling

OTHER:

JIRA	Summary	Priority	Component
HBASE-27820	HBase is not starting due to Jersey library conflicts with javax.ws.rs.api jar	Major	dependencies
HBASE-27880	Bump requests from 2.28.1 to 2.31.0 in /dev-support/flaky-tests	Major	dependabot, scripts, security
HBASE-27634	Builds emit errors related to SBOM parsing	Minor	build
HBASE-27864	Reduce the Cardinality for TestFuzzyRowFilterEndToEndLarge	Major	test
HBASE-27863	Add hadoop 3.3.5 check in our personality script	Major	jenkins, scripts
HBASE-27762	Include EventType and ProcedureV2 pid in logging via MDC	Major	.
HBASE-27791	Upgrade vega and its related js libraries	Major	UI
HBASE-27720	TestClusterRestartFailover is flakey due to metrics assertion	Minor	test

Release 2.5.4 - 2023-04-14

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-27758	Inconsistent synchronization in MetricsUserSourceImpl	Major	.
HBASE-26526	Introduce a timeout to shutdown of WAL	Major	wal
HBASE-27744	Update compression dependencies	Minor	io
HBASE-27676	Scan handlers in the RPC executor should match at least one scan queues	Major	.
HBASE-27646	Should not use pread when prefetching in HFilePreadReader	Minor	Performance
HBASE-27710	ByteBuff ref counting is too expensive for on-heap buffers	Major	.
HBASE-27672	Read RPC threads may BLOCKED at the Configuration.get when using java compression	Minor	.
HBASE-27670	Improve FSUtils to directly obtain FSDataOutputStream	Major	Filesystem Integration
HBASE-23983	Spotbugs warning complain on master build	Major	.
HBASE-27458	Use ReadWriteLock for region scanner readpoint map	Minor	Scanners
HBASE-23102	Improper Usage of Map putIfAbsent	Minor	.
HBASE-27666	Allow preCompact hooks to return scanners whose cells can be shipped	Major	.
HBASE-27655	Remove the empty path annotation from ClusterMetricsResource	Trivial	.
HBASE-15242	Client metrics for retries and timeouts	Major	metrics
HBASE-21521	Expose master startup status via web UI	Major	master, UI
HBASE-27590	Change Iterable to List in SnapshotFileCache	Minor	.

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-27704	Quotas can drastically overflow configured limit	Major	.
HBASE-27726	ruby shell not handled SyntaxError exceptions properly	Minor	shell
HBASE-27732	NPE in TestBasicWALEntryStreamFSHLog.testEOFExceptionInOldWALsDirectory	Major	Replication
HBASE-26866	Shutdown WAL may abort region server	Major	wal
HBASE-27684	Client metrics for user region lock related behaviors.	Major	Client
HBASE-27671	Client should not be able to restore/clone a snapshot after it's TTL has expired	Minor	.
HBASE-27651	hbase-daemon.sh foreground_start should propagate SIGHUP and SIGTERM	Minor	scripts
HBASE-27718	The regionStateNode only need remove once in regionOffline	Minor	amv2
HBASE-27729	Missed one parameter when logging exception in StoreFileListFile	Major	logging
HBASE-27708	CPU hot-spot resolving User subject	Major	Client, tracing
HBASE-27652	Client-side lock contention around Configuration when using read replica regions	Major	Client, read replicas
HBASE-27714	WALEntryStreamTestBase creates a new HBTU in startCluster method which causes all sub classes are testing default configurations	Major	Replication, test
HBASE-27688	HFile splitting occurs during bulkload, the CREATE_TIME_TS of hfileinfo is 0	Major	HFile
HBASE-27250	MasterRpcService#setRegionStateInMeta does not support replica region encodedNames or region names	Minor	.
HBASE-23561	Look up of Region in Master by encoded region name is O(n)	Trivial	.
HBASE-24781	Clean up peer metrics when disabling peer	Major	Replication
HBASE-27650	Merging empty regions corrupts meta cache	Major	.
HBASE-27668	PB's parseDelimitedFrom can successfully return when there are not enough bytes	Critical	Protobufs, wal
HBASE-27644	Should not return false when WALKey has no following KVs while reading WAL file	Critical	dataloss, wal
HBASE-27649	WALPlayer does not properly dedupe overridden cell versions	Major	.
HBASE-27661	Set size of systable queue in UT	Major	.
HBASE-27654	IndexBlockEncoding is missing in HFileContextBuilder copy constructor	Major	.
HBASE-27636	The "CREATE_TIME_TS" value of the hfile generated by the HFileOutputFormat2 class is 0	Major	HFile, mapreduce
HBASE-27648	CopyOnWriteArrayMap does not honor contract of ConcurrentMap.putIfAbsent	Major	.
HBASE-27637	Zero length value would cause value compressor read nothing and not advance the position of the InputStream	Critical	dataloss, wal
HBASE-27602	Remove the impact of operating env on testHFileCleaning	Major	test
HBASE-27621	Also clear the Dictionary when resetting when reading compressed WAL file	Critical	Replication, wal
HBASE-27628	Spotless fix in RELEASENOTES.md	Trivial	.
HBASE-27619	Bulkload fails when trying to bulkload files with invalid names after HBASE-26707	Major	.
HBASE-27580	Reverse scan over rows with tags throw exceptions when using DataBlockEncoding	Major	.
HBASE-27608	Use lowercase image reference name in our docker file	Major	scripts

TESTS:

JIRA	Summary	Priority	Component
HBASE-27595	ThreadGroup is removed since Hadoop 3.2.4	Minor	.

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-27669	chaos-daemon.sh should make use hbase script start/stop chaosagent and chaos monkey runner.	Major	.
HBASE-27643	[JDK17] Add-opens java.util.concurrent	Major	java, test
HBASE-27645	[JDK17] Use ReflectionUtils#getModifiersField in UT	Major	java, test

OTHER:

JIRA	Summary	Priority	Component
HBASE-27736	HFileSystem.getLocalFs is not used	Major	HFile
HBASE-27748	Bump jettison from 1.5.2 to 1.5.4	Major	dependabot, dependencies, security
HBASE-27741	Fall back to protoc osx-x86_64 on Apple Silicon	Minor	build
HBASE-27737	Add supplemental model for com.aayushatharva.brotli4j:native-osx-aarch64	Minor	build, community
HBASE-27685	Enable code coverage reporting to SonarQube in HBase	Minor	.
HBASE-27626	Suppress noisy logging in client.ConnectionImplementation	Minor	logging

Release 2.5.3 - Unreleased (as of 2023-02-01)

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-27506	Optionally disable sorting directories by size in CleanerChore	Minor	.
HBASE-27503	Support replace <FILE-PATH> in GC_OPTS for ZGC	Minor	scripts
HBASE-27512	Add file `.git-blame-ignore-revs` for `git blame`	Trivial	.
HBASE-27487	Slow meta can create pathological feedback loop with multigets	Major	.
HBASE-27466	hbase client metrics per user specified identity on hconnections.	Major	Client
HBASE-27490	Locating regions for all actions of batch requests can exceed operation timeout	Major	.
HBASE-22924	GitHUB PR job should use when clause to filter to just PRs.	Minor	build, community
HBASE-27491	AsyncProcess should not clear meta cache for RejectedExecutionException	Major	.
HBASE-27459	Improve our hbase_docker to be able to build and start standalone clusters other than master branch	Major	scripts
HBASE-27530	Fix comment syntax errors	Trivial	documentation
HBASE-27253	Make slow log configs updatable with configuration observer	Major	.
HBASE-27540	Client metrics for success/failure counts.	Major	Client
HBASE-27233	Read blocks into off-heap if caching is disabled for read	Major	.
HBASE-27531	AsyncRequestFutureImpl unnecessarily clears meta cache for full server	Major	.
HBASE-27565	Make the initial corePoolSize configurable for ChoreService	Major	conf
HBASE-27529	Provide RS coproc ability to attach WAL extended attributes to mutations at replication sink	Major	Coprocessors, Replication
HBASE-27562	Publish SBOM artifacts	Major	java
HBASE-27583	Remove -X option when building protoc check in nightly and pre commit job	Major	jenkins, scripts

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-27463	Reset sizeOfLogQueue when refresh replication source	Minor	Replication
HBASE-27510	Should use 'org.apache.hbase.thirdparty.io.netty.tryReflectionSetAccessible'	Major	.
HBASE-27484	FNFE on StoreFileScanner after a flush followed by a compaction	Major	.
HBASE-27494	Client meta cache clear by exception metrics are missing some cases	Minor	.
HBASE-27519	Another case for FNFE on StoreFileScanner after a flush followed by a compaction	Major	.
HBASE-27498	Observed lot of threads blocked in ConnectionImplementation.getKeepAliveMasterService	Major	Client
HBASE-27524	Fix python requirements problem	Major	scripts, security
HBASE-27390	getClusterMetrics NullPointerException when ServerTask status null	Major	.
HBASE-27485	HBaseTestingUtility minicluster requires log4j2	Major	test
HBASE-27566	Bump gitpython from 3.1.29 to 3.1.30 in /dev-support	Major	scripts, security
HBASE-27560	CatalogJanitor consistencyCheck cannot report the hole on last region if next table is disabled in meta	Minor	hbck2
HBASE-27563	ChaosMonkey sometimes generates invalid boundaries for random item selection	Minor	integration tests
HBASE-27561	hbase.master.port is ignored in processing of hbase.masters	Minor	Client
HBASE-27564	Add default encryption type for MiniKDC to fix failed tests on JDK11+	Major	.
HBASE-27579	CatalogJanitor can cause data loss due to errors during cleanMergeRegion	Blocker	.
HBASE-27589	Rename TestConnectionImplementation in hbase-it to fix javadoc failure	Blocker	Client, documentation
HBASE-27592	Update hadoop netty version for hadoop-2.0 profile	Major	.
HBASE-27586	Bump up commons-codec to 1.15	Major	dependencies, security
HBASE-27547	Close store file readers after region warmup	Major	regionserver
HBASE-26967	FilterList with FuzzyRowFilter and SingleColumnValueFilter evaluated with operator MUST_PASS_ONE doesn't work as expected	Critical	Filters

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-27557	[JDK17] Update shade plugin version	Minor	.
HBASE-25516	[JDK17] reflective access Field.class.getDeclaredField("modifiers") not supported	Major	Filesystem Integration
HBASE-27591	[JDK17] Fix failure TestImmutableScan#testScanCopyConstructor	Minor	.
HBASE-27581	[JDK17] Fix failure TestHBaseTestingUtil#testResolvePortConflict	Minor	test

OTHER:

JIRA	Summary	Priority	Component
HBASE-27513	Modify README.txt to mention how to contribue	Major	community
HBASE-27548	Bump jettison from 1.5.1 to 1.5.2	Major	dependabot, dependencies, security
HBASE-27567	Introduce ChaosMonkey Action to print HDFS Cluster status	Minor	integration tests
HBASE-27568	ChaosMonkey add support for JournalNodes	Major	integration tests
HBASE-27575	Bump future from 0.18.2 to 0.18.3 in /dev-support	Minor	.
HBASE-27578	Upgrade hbase-thirdparty to 4.1.4	Blocker	dependencies, security
HBASE-27588	"Instantiating StoreFileTracker impl" INFO level logging is too chatty	Minor	.

Release 2.5.2 - Unreleased (as of 2022-11-24)

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-26809	Report client backoff time for server overloaded in ConnectionMetrics	Major	.

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-27434	Use $revision as placeholder for maven version to make it easier to control the version from command line	Major	build, pom
HBASE-27167	s390x: Skip tests on unsupported compression libs	Major	build, pom
HBASE-27450	Update all our python scripts to use python3	Major	scripts
HBASE-27414	Search order for locations in HFileLink	Minor	Performance
HBASE-27495	Improve HFileLinkCleaner to validate back reference links ahead the next traverse	Major	master
HBASE-27408	Improve BucketAllocatorException log to always include HFile name	Major	.
HBASE-27496	Optionally limit the amount of plans executed in the Normalizer	Minor	Normalizer

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-27433	DefaultMobStoreCompactor should delete MobStoreFile cleanly when compaction is failed	Major	mob
HBASE-27440	metrics method removeHistogramMetrics trigger serious memory leak	Major	metrics, regionserver
HBASE-25983	javadoc generation fails on openjdk-11.0.11+9	Major	documentation, pom
HBASE-27446	Spotbugs 4.7.2 report a lot of logging errors when generating report	Major	build, jenkins, scripts
HBASE-27437	TestHeapSize is flaky	Major	test
HBASE-27472	The personality script set wrong hadoop2 check version for branch-2	Major	jenkins, scripts
HBASE-27473	Fix spotbugs warnings in hbase-rest Client.getResponseBody	Major	REST
HBASE-27480	Skip error prone for hadoop2/3 checkes in our nightly jobs	Major	jenkins, scripts
HBASE-27469	IllegalArgumentException is thrown by SnapshotScannerHDFSAclController when dropping a table	Major	snapshots
HBASE-27379	numOpenConnections metric is one less than the actual	Minor	metrics
HBASE-27423	Upgrade hbase-thirdparty to 4.1.3 and upgrade Jackson for CVE-2022-42003/42004	Major	security
HBASE-27464	In memory compaction 'COMPACT' may cause data corruption when adding cells large than maxAlloc(default 256k) size	Critical	in-memory-compaction
HBASE-27501	The .flattened-pom.xml for some modules are not installed	Blocker	build, pom
HBASE-27445	result of DirectMemoryUtils#getDirectMemorySize may be wrong	Minor	UI
HBASE-27504	Remove duplicated config 'hbase.normalizer.merge.min_region_age.days' in hbase-default.xml	Minor	conf

TESTS:

JIRA	Summary	Priority	Component
HBASE-27479	Flaky Test testClone in TestTaskMonitor	Trivial	test

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-27475	Use different jdks when running hadoopcheck in personality scripts	Critical	jenkins, scripts

OTHER:

JIRA	Summary	Priority	Component
HBASE-27425	Run flaky test job more often	Minor	test
HBASE-27460	Fix the hadolint errors after HBASE-27456	Major	scripts
HBASE-27443	Use java11 in the general check of our jenkins job	Major	build, jenkins

Release 2.5.1 - 2022-10-21

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-27314	Make index block be customized and configured	Major	.

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-27159	Emit source metrics for BlockCacheExpressHitPercent	Minor	BlockCache, metrics
HBASE-27339	Improve sasl connection failure log message to include server	Minor	Client
HBASE-27365	Minimise block addition failures due to no space in bucket cache writers queue by introducing wait time	Major	BucketCache
HBASE-27391	Downgrade ERROR log to DEBUG in ConnectionUtils.updateStats	Major	.
HBASE-27370	Avoid decompressing blocks when reading from bucket cache prefetch threads	Major	.
HBASE-27361	Add .flattened-pom.xml to .gitignore	Major	build
HBASE-27224	HFile tool statistic sampling produces misleading results	Major	.
HBASE-27340	Artifacts with resolved profiles	Minor	build, pom
HBASE-27332	Remove RejectedExecutionHandler for long/short compaction thread pools	Minor	Compaction
HBASE-27338	brotli compression lib tests fail on arm64	Minor	.
HBASE-27320	hide some sensitive configuration information in the UI	Minor	security, UI

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-27426	Region server abort with failing to list region servers.	Major	Zookeeper
HBASE-27432	TestUsersOperationsWithSecureHadoop fails affter HBASE-27411	Major	.
HBASE-27420	Failure while connecting to zk if HBase is running in standalone mode in a container	Minor	Zookeeper
HBASE-27424	Upgrade Jettison for CVE-2022-40149/40150	Major	.
HBASE-27419	Update to hbase-thirdparty 4.1.2	Major	dependencies
HBASE-27407	Fixing check for "description" request param in JMXJsonServlet.java	Minor	metrics
HBASE-27409	Fix the javadoc for WARCRecord	Major	documentation
HBASE-27381	Still seeing 'Stuck' in static initialization creating RegionInfo instance	Major	.
HBASE-27368	Do not need to throw IllegalStateException when peer is not active in ReplicationSource.initialize	Major	regionserver, Replication
HBASE-27352	Quoted string argument with spaces passed from command line are propagated wrongly to the underlying java class	Minor	shell
HBASE-27362	Fix some tests hung by CompactSplit.requestCompactionInternal ignoring compactionsEnabled check	Major	Compaction
HBASE-27353	opentelemetry-context jar missing at runtime causes MR jobs to fail	Minor	.
HBASE-22939	SpaceQuotas- Bulkload from different hdfs failed when space quotas are turned on.	Major	.
HBASE-27336	The region visualizer shows 'undefined' region server	Major	master, UI
HBASE-27335	HBase shell hang for a minute when quiting	Major	shell
HBASE-27152	Under compaction mark may leak	Major	Compaction
HBASE-25922	Disabled sanity checks ignored on snapshot restore	Minor	conf, snapshots
HBASE-27246	RSGroupMappingScript#getRSGroup has thread safety problem	Major	rsgroup
HBASE-25166	MobFileCompactionChore is closing the master's shared cluster connection	Major	master

TESTS:

JIRA	Summary	Priority	Component
HBASE-27360	The trace related assertions are flaky for async client tests	Major	test, tracing

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-27421	Bump spotless plugin to 2.27.2 and reimplement the 'Remove unhelpful javadoc stubs' rule	Major	documentation, pom
HBASE-27401	Clean up current broken 'n's in our javadoc	Major	documentation
HBASE-27403	Remove 'Remove unhelpful javadoc stubs' spotless rule for now	Major	documentation, pom

OTHER:

JIRA	Summary	Priority	Component
HBASE-27431	Remove TestRemoteTable.testLimitedScan	Trivial	REST, test
HBASE-27411	Update and clean up bcprov-jdk15on dependency	Minor	build
HBASE-27372	Update java versions in our Dockerfiles	Major	build, scripts
HBASE-27373	Fix new spotbugs warnings after upgrading spotbugs to 4.7.2	Major	.
HBASE-27371	Bump spotbugs version	Major	build, pom

Release 2.5.0 - Unreleased (as of 2022-08-23)

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-27104	Add a tool command list_unknownservers	Major	master
HBASE-27129	Add a config that allows us to configure region-level storage policies	Major	regionserver
HBASE-27028	Add a shell command for flushing master local region	Minor	shell
HBASE-26826	Backport StoreFileTracker (HBASE-26067, HBASE-26584, and others) to branch-2.5	Major	Operability, regionserver
HBASE-26342	Support custom paths of independent configuration and pool for hfile cleaner	Major	master
HBASE-27018	Add a tool command list_liveservers	Major	.
HBASE-26617	Use spotless to reduce the pain on fixing checkstyle issues	Major	build, community
HBASE-26959	Brotli compression support	Minor	.
HBASE-25865	Visualize current state of region assignment	Blocker	master, Operability, Usability
HBASE-26703	Allow configuration of IPC queue balancer	Minor	.
HBASE-26576	Allow Pluggable Queue to belong to FastPath or normal Balanced Executor	Minor	regionserver, rpc
HBASE-26347	Support detect and exclude slow DNs in fan-out of WAL	Major	wal
HBASE-26284	Add HBase Thrift API to get all table names along with whether it is enabled or not	Major	Thrift
HBASE-26141	Add tracing support for HTable and sync connection on branch-2	Major	tracing
HBASE-6908	Pluggable Call BlockingQueue for HBaseServer	Major	IPC/RPC
HBASE-25841	Add basic jshell support	Minor	shell, Usability
HBASE-25756	Support alternate compression for major and minor compactions	Minor	Compaction
HBASE-25751	Add writable TimeToPurgeDeletes to ScanOptions	Major	.
HBASE-25665	Disable reverse DNS lookup for SASL Kerberos client connection	Major	.
HBASE-25587	[hbck2] Schedule SCP for all unknown servers	Major	hbase-operator-tools, hbck2
HBASE-25460	Expose drainingServers as cluster metric	Major	metrics
HBASE-25496	add get_namespace_rsgroup command	Major	.
HBASE-24620	Add a ClusterManager which submits command to ZooKeeper and its Agent which picks and execute those Commands.	Major	integration tests
HBASE-22749	Distributed MOB compactions	Major	mob

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-27305	add an option to skip file splitting when bulkload hfiles	Minor	tooling
HBASE-27089	Add “commons.crypto.stream.buffer.size” configuration	Minor	io
HBASE-27268	In trace log mode, the client does not print callId/startTime and the server does not print receiveTime	Minor	logging
HBASE-26982	Add index and bloom filter statistics of LruBlockCache on rs web UI	Minor	BlockCache, UI
HBASE-27296	Some Cell's implementation of toString() such as IndividualBytesFieldCell prints out value and tags which is too verbose	Minor	logging
HBASE-27283	Use readTO instead of hard coded RpcClient.DEFAULT_SOCKET_TIMEOUT_READ when creating ReadTimeoutHandler in NettyRpcConnection	Major	IPC/RPC, test
HBASE-27273	Should stop autoRead and skip all the bytes when rpc request too big	Major	IPC/RPC
HBASE-27153	Improvements to read-path tracing	Major	Operability, regionserver
HBASE-27229	BucketCache statistics should not count evictions by hfile	Major	.
HBASE-27222	Purge FutureReturnValueIgnored warnings from error prone	Major	netty
HBASE-20499	Replication/Priority executors can use specific max queue length as default value instead of general maxQueueLength	Minor	rpc
HBASE-27208	Use spotless to purge the missing summary warnings from error prone	Major	pom
HBASE-27048	Server side scanner time limit should account for time in queue	Major	.
HBASE-27088	IntegrationLoadTestCommonCrawl async load improvements	Minor	integration tests, test
HBASE-27149	Server should close scanner if client times out before results are ready	Major	.
HBASE-27188	Report maxStoreFileCount in jmx	Minor	.
HBASE-27186	Report block cache size metrics separately for L1 and L2	Minor	.
HBASE-26950	Use AsyncConnection in ReplicationSink	Major	.
HBASE-27078	Allow configuring a separate timeout for meta scans	Major	.
HBASE-27101	support commons-crypto version 1.1.0	Minor	.
HBASE-26218	Better logging in CanaryTool	Minor	canary
HBASE-27146	Avoid CellUtil.cloneRow in MetaCellComparator	Major	meta, Offheaping, Performance
HBASE-27125	The batch size of cleaning expired mob files should have an upper bound	Minor	mob
HBASE-26923	PerformanceEvaluation support encryption option	Minor	PE
HBASE-27095	HbckChore should produce a report	Major	hbck2, master
HBASE-27046	The filenum in AbstractFSWAL should be monotone increasing	Major	.
HBASE-27093	AsyncNonMetaRegionLocator：put Complete CompletableFuture outside lock block	Major	asyncclient, Client
HBASE-27080	Optimize debug output log of ConstantSizeRegionSplitPolicy class.	Minor	logging
HBASE-26649	Support meta replica LoadBalance mode for RegionLocator#getAllRegionLocations()	Major	meta replicas
HBASE-26320	Separate Log Cleaner DirScanPool to prevent the OLDWALs from filling up the disk when archive is large	Major	Operability
HBASE-27043	Let lock wait timeout to improve performance of SnapshotHFileCleaner	Major	snapshots
HBASE-25465	Use javac --release option for supporting cross version compilation	Minor	create-release
HBASE-27013	Introduce read all bytes when using pread for prefetch	Major	HFile, Performance
HBASE-27003	Optimize log format for PerformanceEvaluation	Minor	.
HBASE-26990	Add default implementation for BufferedMutator interface setters	Minor	.
HBASE-26419	Tracing Spans of RPCs should follow otel semantic conventions	Blocker	tracing
HBASE-26961	cache region locations when getAllRegionLocations() for branch-2.4+	Minor	Client
HBASE-26975	Add on heap and off heap memstore info in rs web UI	Minor	UI
HBASE-26980	Update javadoc of BucketCache.java	Trivial	documentation
HBASE-26971	SnapshotInfo --snapshot param is marked as required even when trying to list all snapshots	Minor	.
HBASE-26807	Unify CallQueueTooBigException special pause with CallDroppedException	Major	.
HBASE-26891	Make MetricsConnection scope configurable	Minor	.
HBASE-26947	Implement a special TestAppender to limit the size of test output	Major	logging, test
HBASE-26618	Involving primary meta region in meta scan with CatalogReplicaLoadBalanceSimpleSelector	Minor	meta replicas
HBASE-26885	The TRSP should not go on when it get a bogus server name from AM	Major	proc-v2
HBASE-26872	Load rate calculator for cost functions should be more precise	Major	Balancer
HBASE-26832	Avoid repeated releasing of flushed wal entries in AsyncFSWAL#syncCompleted	Major	wal
HBASE-26878	TableInputFormatBase should cache RegionSizeCalculator	Minor	.
HBASE-26175	MetricsHBaseServer should record all kinds of Exceptions	Minor	metrics
HBASE-21065	Try ROW_INDEX_V1 encoding on meta table (fix bloomfilters on meta while we are at it)	Major	meta, Performance
HBASE-26858	Refactor TestMasterRegionOnTwoFileSystems to avoid dead loop	Major	test
HBASE-26833	Avoid waiting to clear buffer usage of ReplicationSourceShipper when aborting the RS	Major	regionserver, Replication
HBASE-26848	Set java.io.tmpdir on mvn command when running jenkins job	Major	jenkins, test
HBASE-26828	Increase the concurrency when running UTs in pre commit job	Major	jenkins, test
HBASE-26680	Close and do not write trailer for the broken WAL writer	Major	wal
HBASE-26720	ExportSnapshot should validate the source snapshot before copying files	Major	snapshots
HBASE-26275	update error message when executing deleteall with ROWPREFIXFILTER in meta table	Minor	shell
HBASE-26835	Rewrite TestLruAdaptiveBlockCache to make it more stable	Major	test
HBASE-26830	Rewrite TestLruBlockCache to make it more stable	Major	test
HBASE-26814	Default StoreHotnessProtector to off, with logs to guide when to turn it on	Major	.
HBASE-26784	Use HIGH_QOS for ResultScanner.close requests	Major	.
HBASE-26552	Introduce retry to logroller to avoid abort	Major	wal
HBASE-26792	Implement ScanInfo#toString	Minor	regionserver
HBASE-26731	Metrics for tracking of active scanners	Minor	.
HBASE-26789	Automatically add default security headers to http/rest if SSL enabled	Major	REST, UI
HBASE-26765	Minor refactor of async scanning code	Major	.
HBASE-26659	The ByteBuffer of metadata in RAMQueueEntry in BucketCache could be reused.	Major	BucketCache, Performance
HBASE-26730	Extend hbase shell 'status' command to support an option 'tasks'	Minor	Operability, shell
HBASE-26709	Ban the usage of junit 3 TestCase	Major	test
HBASE-26724	Backport the UT changes in HBASE-24510 to branch-2.x	Major	test
HBASE-26702	Make ageOfLastShip, ageOfLastApplied extend TimeHistogram instead of plain histogram.	Minor	metrics, Replication
HBASE-26726	Allow disable of region warmup before graceful move	Minor	master, Region Assignment
HBASE-26657	ProfileServlet should move the output location to hbase specific directory	Minor	.
HBASE-26590	Hbase-client Meta lookup performance regression between hbase-1 and hbase-2	Major	meta
HBASE-26567	Remove IndexType from ChunkCreator	Major	in-memory-compaction
HBASE-26641	Split TestMasterFailoverWithProcedures	Major	proc-v2, test
HBASE-26629	Add expiration for long time vacant scanners in Thrift2	Major	Performance, Thrift
HBASE-26638	Cherry-pick the ReflectionUtils improvements in HBASE-21515 to branch-2	Major	util
HBASE-26635	Optimize decodeNumeric in OrderedBytes	Major	Performance
HBASE-26623	Report CallDroppedException in exception metrics	Minor	IPC/RPC, metrics, rpc
HBASE-26609	Round the size to MB or KB at the end of calculation in HRegionServer.createRegionLoad	Major	regionserver
HBASE-26598	Fix excessive connections in MajorCompactor	Major	Compaction, tooling
HBASE-26579	Set storage policy of recovered edits when wal storage type is configured	Major	Recovery
HBASE-26601	maven-gpg-plugin failing with "Inappropriate ioctl for device"	Major	build
HBASE-26556	IT and Chaos Monkey improvements	Minor	integration tests
HBASE-25547	Thread pools should release unused resources	Minor	master, regionserver
HBASE-26525	Use unique thread name for group WALs	Major	wal
HBASE-26517	Add auth method information to AccessChecker audit log	Trivial	security
HBASE-26512	Make timestamp format configurable in HBase shell scan output	Major	shell
HBASE-26485	Introduce a method to clean restore directory after Snapshot Scan	Minor	snapshots
HBASE-26479	Print too slow/big scan's operation_id in region server log	Minor	regionserver, scan
HBASE-26475	The flush and compact methods in HTU should skip processing secondary replicas	Major	test
HBASE-26249	Ameliorate compaction made by bulk-loading files	Major	.
HBASE-26421	Use HFileLink file to replace entire file‘s reference when splitting	Major	.
HBASE-26267	Master initialization fails if Master Region WAL dir is missing	Major	master
HBASE-26446	CellCounter should report serialized cell size counts too	Minor	.
HBASE-26432	Add tracing support in hbase shell	Minor	shell, tracing
HBASE-26337	Optimization for weighted random generators	Major	Balancer
HBASE-26363	OpenTelemetry configuration support for per-process service names	Major	tracing
HBASE-26309	Balancer tends to move regions to the server at the end of list	Major	Balancer
HBASE-26305	Move NavigableSet add operation to writer thread in BucketCache	Minor	BucketCache, Performance
HBASE-26251	StochasticLoadBalancer metrics should update even if balancer doesn't run	Minor	Balancer
HBASE-26270	Provide getConfiguration method for Region and Store interface	Minor	.
HBASE-26273	TableSnapshotInputFormat/TableSnapshotInputFormatImpl should use ReadType.STREAM for scanning HFiles	Major	mapreduce
HBASE-26276	Allow HashTable/SyncTable to perform rawScan when comparing cells	Major	.
HBASE-26229	Limit count and size of L0 files compaction in StripeCompactionPolicy	Major	Compaction
HBASE-26243	Fix typo for file 'hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java'	Trivial	.
HBASE-25773	TestSnapshotScannerHDFSAclController.setupBeforeClass is flaky	Major	.
HBASE-26147	Add dry run mode to hbase balancer	Major	Balancer, master
HBASE-25642	Fix or stop warning about already cached block	Major	BlockCache, Operability, regionserver
HBASE-26212	Allow AuthUtil automatic renewal to be disabled	Minor	Client, security
HBASE-26187	Write straight into the store directory when Splitting and Merging	Major	.
HBASE-26193	Do not store meta region location as permanent state on zookeeper	Major	meta, Zookeeper
HBASE-24652	master-status UI make date type fields sortable	Minor	master, Operability, UI, Usability
HBASE-25680	Non-idempotent test in TestReplicationHFileCleaner	Minor	test
HBASE-26179	TestRequestTooBigException spends too much time to finish	Major	test
HBASE-26160	Configurable disallowlist for live editing of loglevels	Minor	.
HBASE-25469	Add detailed RIT info in JSON format for consumption as metrics	Minor	master
HBASE-26154	Provide exception metric for quota exceeded and throttling	Minor	.
HBASE-26144	The HStore.snapshot method is never called in main code	Major	regionserver
HBASE-26105	Rectify the expired TODO comment in CombinedBC	Trivial	BlockCache
HBASE-26146	Allow custom opts for hbck in hbase bin	Minor	.
HBASE-26118	The HStore.commitFile and HStore.moveFileIntoPlace almost have the same logic	Major	Compaction, regionserver
HBASE-26119	Polish TestAsyncNonMetaRegionLocator	Major	meta replicas, test
HBASE-21946	Use ByteBuffer pread instead of byte[] pread in HFileBlock when applicable	Critical	Offheaping
HBASE-26025	Add a flag to mark if the IOError can be solved by retry in thrift IOError	Major	Thrift
HBASE-25986	Expose the NORMALIZARION_ENABLED table descriptor through a property in hbase-site	Minor	Normalizer
HBASE-25700	Enhance znode parent validation when add_peer	Minor	Replication
HBASE-26069	Remove HStore.compactRecentForTestingAssumingDefaultPolicy and DefaultCompactor.compactForTesting	Major	Compaction, test
HBASE-26065	StripeStoreFileManager does not need to throw IOException for most methods	Major	Compaction, HFile
HBASE-25914	Provide slow/large logs on RegionServer UI	Major	regionserver, UI
HBASE-26012	Improve logging and dequeue logic in DelayQueue	Minor	.
HBASE-26020	Split TestWALEntryStream.testDifferentCounts out	Major	Replication, test
HBASE-25937	Clarify UnknownRegionException	Minor	Client
HBASE-25998	Revisit synchronization in SyncFuture	Major	Performance, regionserver, wal
HBASE-26000	Optimize the display of ZK dump in the master web UI	Minor	.
HBASE-25995	Change the method name for DoubleArrayCost.setCosts	Major	Balancer
HBASE-26002	MultiRowMutationEndpoint should return the result of the conditional update	Major	Coprocessors
HBASE-25993	Make excluded SSL cipher suites configurable for all Web UIs	Major	.
HBASE-25987	Make SSL keystore type configurable for HBase ThriftServer	Major	Thrift
HBASE-25666	Explain why balancer is skipping runs	Major	Balancer, master, UI
HBASE-25942	Get rid of null regioninfo in wrapped connection exceptions	Trivial	logging
HBASE-25745	Deprecate/Rename config `hbase.normalizer.min.region.count` to `hbase.normalizer.merge.min.region.count`	Minor	master, Normalizer
HBASE-25908	Exclude jakarta.activation-api	Major	hadoop3, shading
HBASE-25933	Log trace raw exception, instead of cause message in NettyRpcServerRequestDecoder	Minor	.
HBASE-25534	Honor TableDescriptor settings earlier in normalization	Major	Normalizer
HBASE-25906	UI of master-status to show recent history of balancer desicion	Major	Balancer, master, UI
HBASE-25899	Improve efficiency of SnapshotHFileCleaner	Major	master
HBASE-25682	Add a new command to update the configuration of all RSs in a RSGroup	Major	Admin, shell
HBASE-25032	Do not assign regions to region server which has not called regionServerReport yet	Major	.
HBASE-25860	Add metric for successful wal roll requests.	Major	metrics, wal
HBASE-25754	StripeCompactionPolicy should support compacting cold regions	Minor	Compaction
HBASE-25766	Introduce RegionSplitRestriction that restricts the pattern of the split point	Major	.
HBASE-25798	typo in MetricsAssertHelper	Minor	.
HBASE-25770	Http InfoServers should honor gzip encoding when requested	Major	UI
HBASE-25776	Use Class.asSubclass to fix the warning in StochasticLoadBalancer.loadCustomCostFunctions	Minor	Balancer
HBASE-25767	CandidateGenerator.getRandomIterationOrder is too slow on large cluster	Major	Balancer, Performance
HBASE-25762	Improvement for some debug-logging guards	Minor	logging, Performance
HBASE-25653	Add units and round off region size to 2 digits after decimal	Major	master, Normalizer
HBASE-25482	Improve SimpleRegionNormalizer#getAverageRegionSizeMb	Minor	Normalizer
HBASE-25759	The master services field in LocalityBasedCostFunction is never used	Major	Balancer
HBASE-25744	Change default of `hbase.normalizer.merge.min_region_size.mb` to `0`	Major	master, Normalizer
HBASE-25747	Remove unused getWriteAvailable method in OperationQuota	Minor	Quotas
HBASE-25558	Adding audit log for execMasterService	Major	.
HBASE-25703	Support conditional update in MultiRowMutationEndpoint	Major	Coprocessors
HBASE-25686	[hbtop] Add some javadoc	Minor	hbtop
HBASE-25627	HBase replication should have a metric to represent if the source is stuck getting initialized	Major	Replication
HBASE-25688	Use CustomRequestLog instead of Slf4jRequestLog for jetty	Major	logging, UI
HBASE-25678	Support nonce operations for Increment/Append in RowMutations and CheckAndMutate	Major	.
HBASE-25679	Size of log queue metric is incorrect in branch-1/branch-2	Major	.
HBASE-25518	Support separate child regions to different region servers	Major	.
HBASE-25643	The delayed FlushRegionEntry should be removed when we need a non-delayed one	Major	regionserver
HBASE-25621	Balancer should check region plan source to avoid misplace region groups	Major	Balancer
HBASE-25374	Make REST Client connection and socket time out configurable	Minor	REST
HBASE-25597	Add row info in Exception when cell size exceeds maxCellSize	Minor	.
HBASE-25660	Print split policy in use on Region open (as well as split policy vitals)	Trivial	.
HBASE-25635	CandidateGenerator may miss some region balance actions	Major	Balancer
HBASE-25622	Result#compareResults should compare tags.	Major	Client
HBASE-25570	On largish cluster, "CleanerChore: Could not delete dir..." makes master log unreadable	Major	.
HBASE-25566	RoundRobinTableInputFormat	Major	mapreduce
HBASE-25636	Expose HBCK report as metrics	Minor	metrics
HBASE-25548	Optionally allow snapshots to preserve cluster's max filesize config by setting it into table descriptor	Major	.
HBASE-25582	Support setting scan ReadType to be STREAM at cluster level	Major	.
HBASE-23578	[UI] Master UI shows long stack traces when table is broken	Minor	master, UI
HBASE-25637	Rename method completeCompaction to refreshStoreSizeCount	Minor	.
HBASE-25492	Create table with rsgroup info in branch-2	Major	rsgroup
HBASE-25603	Add switch for compaction after bulkload	Major	Compaction
HBASE-25539	Add metric for age of oldest wal.	Major	metrics, regionserver
HBASE-25574	Revisit put/delete/increment/append related RegionObserver methods	Major	Coprocessors
HBASE-25541	In WALEntryStream, set the current path to null while dequeing the log	Major	.
HBASE-23887	New L1 cache : AdaptiveLRU	Major	BlockCache, Performance
HBASE-25364	Redo the getMidPoint() in HFileWriterImpl to get rid of the double comparison process	Minor	.
HBASE-25519	BLOCKSIZE needs to support pretty print	Major	.
HBASE-24772	Use GetoptLong or OptionParser in hbase-shell	Minor	shell
HBASE-25542	Add client detail to scan name so when lease expires, we have clue on who was scanning	Major	scan
HBASE-25553	It is better for ReplicationTracker.getListOfRegionServers to return ServerName instead of String	Major	.
HBASE-25528	Dedicated merge dispatch threadpool on master	Minor	master
HBASE-25536	Remove 0 length wal file from logQueue if it belongs to old sources.	Major	Replication
HBASE-25329	Dump region hashes in logs for the regions that are stuck in transition for more than a configured amount of time	Minor	.
HBASE-25475	Improve unit test for HBASE-25445 : SplitWALRemoteProcedure failed to archive split WAL	Minor	wal
HBASE-25431	MAX_FILESIZE and MEMSTORE_FLUSHSIZE should not be set negative number	Major	.
HBASE-25439	Add BYTE unit in PrettyPrinter.Unit	Major	.
HBASE-25249	Adding StoreContext	Major	.
HBASE-23340	hmaster /hbase/replication/rs session expired (hbase replication default value is true, we don't use ) causes logcleaner can not clean oldWALs, which resulits in oldWALs too large (more than 2TB)	Major	master
HBASE-25449	'dfs.client.read.shortcircuit' should not be set in hbase-default.xml	Major	conf
HBASE-25476	Enable error prone check in pre commit	Major	build
HBASE-25211	Rack awareness in region_mover	Major	.
HBASE-25483	set the loadMeta log level to debug.	Major	MTTR, Region Assignment
HBASE-25471	Move RegionScannerImpl out of HRegion	Major	regionserver
HBASE-25458	HRegion methods cleanup	Major	regionserver
HBASE-25435	Slow metric value can be configured	Minor	metrics
HBASE-25318	Configure where IntegrationTestImportTsv generates HFiles	Minor	integration tests
HBASE-25450	The parameter "hbase.bucketcache.size" is misdescribed	Major	conf
HBASE-24751	Display Task completion time and/or processing duration on Web UI	Minor	UI
HBASE-25379	Make retry pause time configurable for regionserver short operation RPC (reportRegionStateTransition/reportProcedureDone)	Minor	regionserver
HBASE-24850	CellComparator perf improvement	Critical	Performance, scan
HBASE-25443	Improve the experience of using the Master webpage by change the loading process of snapshot list to asynchronous	Minor	master, UI
HBASE-25425	Some notes on RawCell	Trivial	.
HBASE-25084	RegexStringComparator in ParseFilter should support case-insensitive regexes	Major	Thrift
HBASE-25420	Some minor improvements in rpc implementation	Minor	rpc
HBASE-25246	Backup/Restore hbase cell tags.	Major	backup&restore
HBASE-25363	Improve performance of HFileLinkCleaner by using ReadWriteLock instead of synchronize	Major	master
HBASE-25328	Add builder method to create Tags.	Minor	.
HBASE-25187	Improve SizeCachedKV variants initialization	Minor	.
HBASE-23303	Add security headers to REST server/info page	Major	REST

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-25970	MOB data loss - incorrect concatenation of MOB_FILE_REFS	Critical	mob
HBASE-24163	MOB compactor implementations should use format specifiers when calling String.format	Major	Compaction, mob
HBASE-27292	Fix build failure against Hadoop 3.3.4 due to added dependency on okhttp	Major	build, hadoop3, pom
HBASE-27275	graceful_stop.sh unable to restore the balance state	Blocker	regionserver
HBASE-27282	CME in AuthManager causes region server crash	Major	acl
HBASE-26775	TestProcedureSchedulerConcurrency fails in pre commit	Major	proc-v2, test
HBASE-27269	The implementation of TestReplicationStatus.waitOnMetricsReport is incorrect	Major	Replication, test
HBASE-27271	BufferCallBeforeInitHandler should ignore the flush request	Major	IPC/RPC
HBASE-26977	HMaster's ShutdownHook does not take effect, if tablesOnMaster is false	Major	master
HBASE-27247	TestPerTableCFReplication.testParseTableCFsFromConfig is broken because of ReplicationPeerConfigUtil.parseTableCFsFromConfig	Major	Replication
HBASE-27087	TestQuotaThrottle times out	Major	test
HBASE-27179	Issues building with OpenJDK 17	Minor	build
HBASE-27204	BlockingRpcClient will hang for 20 seconds when SASL is enabled after finishing negotiation	Critical	rpc, sasl, security
HBASE-27075	TestUpdateRSGroupConfiguration.testCustomOnlineConfigChangeInRSGroup is flaky	Minor	rsgroup, test
HBASE-27219	Change JONI encoding in RegexStringComparator	Minor	Filters
HBASE-27195	Clean up netty worker/thread pool configuration	Major	.
HBASE-27211	Data race in MonitoredTaskImpl could cause split wal failure	Critical	monitoring, wal
HBASE-27053	IOException during caching of uncompressed block to the block cache.	Major	BlockCache
HBASE-27192	The retry number for TestSeparateClientZKCluster is too small	Major	test, Zookeeper
HBASE-27193	TestZooKeeper is flaky	Major	test, Zookeeper
HBASE-27097	SimpleRpcServer is broken	Blocker	rpc
HBASE-27189	NettyServerRpcConnection is not properly closed when the netty channel is closed	Blocker	netty, rpc
HBASE-27169	TestSeparateClientZKCluster is flaky	Major	test
HBASE-27180	Multiple possible buffer leaks	Major	netty, regionserver
HBASE-26708	Netty "leak detected" and OutOfDirectMemoryError due to direct memory buffering with SASL implementation	Blocker	netty, rpc, sasl
HBASE-27171	Fix Annotation Error in HRegionFileSystem	Trivial	.
HBASE-27170	ByteBuffAllocator leak when decompressing blocks near minSizeForReservoirUse	Major	.
HBASE-27160	ClientZKSyncer.deleteDataForClientZkUntilSuccess should break from the loop when deletion is succeeded	Major	Client, Zookeeper
HBASE-27001	The deleted variable cannot be printed out	Minor	.
HBASE-27105	HBaseInterClusterReplicationEndpoint should honor replication adaptive timeout	Major	Replication
HBASE-27098	Fix link for field comments	Minor	.
HBASE-27143	Add hbase-unsafe as a dependency for a MR job triggered by hbase shell	Major	integration tests, mapreduce
HBASE-27099	In the HFileBlock class, the log printing fspread/fsread cost time unit should be milliseconds	Minor	HFile
HBASE-27128	when open archiveRetries totalLogSize calculation mistake	Minor	wal
HBASE-27117	Update the method comments for RegionServerAccounting	Minor	.
HBASE-27103	All MR UTs are broken because of ClassNotFound	Critical	hadoop3, test
HBASE-27066	The Region Visualizer display failed	Major	.
HBASE-27038	CellComparator should extend Serializable	Minor	.
HBASE-27017	MOB snapshot is broken when FileBased SFT is used	Major	mob
HBASE-26985	SecureBulkLoadManager will set wrong permission if umask too strict	Major	regionserver
HBASE-27081	Fix disallowed compatibility breaks on branch-2.5 and branch-2	Blocker	.
HBASE-27079	Lower some DEBUG level logs in ReplicationSourceWALReader to TRACE	Minor	.
HBASE-27068	NPE occurs when the active master has not yet been elected	Major	.
HBASE-27064	CME in TestRegionNormalizerWorkQueue	Minor	test
HBASE-27069	Hbase SecureBulkload permission regression	Major	.
HBASE-27065	Build against Hadoop 3.3.3	Major	build
HBASE-26854	Shell startup logs a bunch of noise	Major	.
HBASE-27061	two phase bulkload is broken when SFT is in use.	Major	.
HBASE-27055	Add additional comments when using HBASE_TRACE_OPTS with standalone mode	Minor	tracing
HBASE-27030	Fix undefined local variable error in draining_servers.rb	Major	jruby, shell
HBASE-27047	Fix typo for metric drainingRegionServers	Minor	metrics
HBASE-27027	Deprecated jetty SslContextFactory cause HMaster startup failure due to multiple certificates in KeyStores	Major	security
HBASE-27032	The draining region servers metric description is incorrect	Minor	.
HBASE-27019	Minor compression performance improvements	Trivial	.
HBASE-26905	ReplicationPeerManager#checkPeerExists should throw ReplicationPeerNotFoundException if peer doesn't exists	Major	Replication
HBASE-27021	StoreFileInfo should set its initialPath in a consistent way	Major	.
HBASE-26994	MasterFileSystem create directory without permission check	Major	master
HBASE-26963	ReplicationSource#removePeer hangs if we try to remove bad peer.	Major	regionserver, Replication
HBASE-27000	Block cache stats (Misses Caching) display error in RS web UI	Major	.
HBASE-26984	Chaos Monkey thread dies in ITBLL Chaos GracefulRollingRestartRsAction	Major	integration tests
HBASE-26992	Brotli compressor has unexpected behavior during reinitialization	Minor	.
HBASE-26988	Balancer should reset to default setting for hbase.master.loadbalance.bytable if dynamically reloading configuration	Minor	Balancer
HBASE-26917	Do not add --threads when running 'mvn site'	Major	build, scripts
HBASE-22349	Stochastic Load Balancer skips balancing when node is replaced in cluster	Major	Balancer
HBASE-26979	StoreFileListFile logs frequent stacktraces at INFO level	Minor	.
HBASE-26941	LocalHBaseCluster.waitOnRegionServer should not call join while interrupted	Critical	test
HBASE-26938	Compaction failures after StoreFileTracker integration	Blocker	Compaction
HBASE-26944	Possible resource leak while creating new region scanner	Major	.
HBASE-26895	on hbase shell, 'delete/deleteall' for a columnfamily is not working	Major	shell
HBASE-26901	delete with null columnQualifier occurs NullPointerException when NewVersionBehavior is on	Major	Deletes, Scanners
HBASE-26880	Misspelling commands in hbase shell will crash the shell	Minor	shell
HBASE-26939	Typo in admin.rb "COMPRESSION_COMPACT_MAJPR"	Trivial	.
HBASE-26924	[Documentation] Fix log parameter error and spelling error	Trivial	logging
HBASE-26811	Secondary replica may be disabled for read incorrectly forever	Major	read replicas
HBASE-26812	ShortCircuitingClusterConnection fails to close RegionScanners when making short-circuited calls	Critical	.
HBASE-26838	Junit jar is not included in the hbase tar ball, causing issues for some hbase tools that do rely on it	Major	integration tests, tooling
HBASE-26871	shaded mapreduce and shaded byo-hadoop client artifacts contains no classes	Blocker	integration tests, jenkins, mapreduce
HBASE-26896	list_quota_snapshots fails with ‘ERROR NameError: uninitialized constant Shell::Commands::ListQuotaSnapshots::TABLE’	Major	shell
HBASE-26718	HFileArchiver can remove referenced StoreFiles from the archive	Major	Compaction, HFile, snapshots
HBASE-26864	SplitTableRegionProcedure calls openParentRegions() at a wrong state during rollback.	Major	Region Assignment
HBASE-26876	Use toStringBinary for rowkey in RegionServerCallable error string	Minor	.
HBASE-26875	RpcRetryingCallerImpl translateException ignores return value of recursive call	Minor	.
HBASE-26869	RSRpcServices.scan should deep clone cells when RpcCallContext is null	Major	regionserver
HBASE-26870	Log4j2 integration is incorrect in nighly's client integration test	Critical	jenkins, logging
HBASE-26840	Fix NPE in the retry of logroller	Minor	wal
HBASE-26670	HFileLinkCleaner should be added even if snapshot is disabled	Critical	snapshots
HBASE-26761	TestMobStoreScanner (testGetMassive) can OOME	Minor	mob, test
HBASE-26816	Fix CME in ReplicationSourceManager	Minor	Replication
HBASE-26715	Blocked on SyncFuture in AsyncProtobufLogWriter#write	Major	.
HBASE-26804	Missing opentelemetry agent in hadoop-two-compat.xml	Blocker	tracing
HBASE-26815	TestFanOutOneBlockAsyncDFSOutput is flakey	Major	test
HBASE-26783	ScannerCallable doubly clears meta cache on retries	Major	.
HBASE-26777	BufferedDataBlockEncoder$OffheapDecodedExtendedCell.deepClone throws UnsupportedOperationException	Major	regionserver
HBASE-26745	MetricsStochasticBalancerSource metrics don't render in /jmx endpoint	Minor	.
HBASE-26776	RpcServer failure to SASL handshake always logs user "unknown" to audit log	Major	security
HBASE-26772	Shell suspended in background	Minor	shell
HBASE-26767	Rest server should not use a large Header Cache.	Major	REST
HBASE-26546	hbase-shaded-client missing required thirdparty classes under hadoop 3.3.1	Major	Client, hadoop3, shading
HBASE-26727	Fix CallDroppedException reporting	Minor	.
HBASE-26712	Balancer encounters NPE in rare case	Major	.
HBASE-26742	Comparator of NOT_EQUAL NULL is invalid for checkAndMutate	Major	.
HBASE-26688	Threads shared EMPTY_RESULT may lead to unexpected client job down.	Major	Client
HBASE-26741	Incorrect exception handling in shell	Critical	shell
HBASE-26729	Backport "HBASE-26714 Introduce path configuration for system coprocessors" to branch-2	Major	Coprocessors
HBASE-26713	Increments submitted by 1.x clients will be stored with timestamp 0 on 2.x+ clusters	Major	.
HBASE-26679	Wait on the future returned by FanOutOneBlockAsyncDFSOutput.flush would stuck	Critical	wal
HBASE-26662	User.createUserForTesting should not reset UserProvider.groups every time if hbase.group.service.for.test.only is true	Major	.
HBASE-26671	Misspellings of hbck usage	Minor	hbck
HBASE-26469	correct HBase shell exit behavior to match code passed to exit	Critical	shell
HBASE-26543	correct parsing of hbase shell args with GetoptLong	Blocker	shell
HBASE-26643	LoadBalancer should not return empty map	Critical	proc-v2, Region Assignment, test
HBASE-26646	WALPlayer should obtain token from filesystem	Minor	.
HBASE-26494	Using RefCnt to fix the flawed MemStoreLABImpl	Major	regionserver
HBASE-26625	ExportSnapshot tool failed to copy data files for tables with merge region	Minor	.
HBASE-26615	Snapshot referenced data files are deleted when delete a table with merge regions	Major	.
HBASE-26613	The logic of the method incrementIV in Encryption class has problem	Major	Performance, security
HBASE-26488	Memory leak when MemStore retry flushing	Major	regionserver
HBASE-26340	TableSplit returns false size under 1MB	Major	mapreduce, regionserver
HBASE-26537	FuzzyRowFilter backwards compatibility	Major	.
HBASE-26550	Make sure the master is running normally before accepting a balance command	Minor	Balancer, master
HBASE-26541	hbase-protocol-shaded not buildable on M1 MacOSX	Major	.
HBASE-26527	ArrayIndexOutOfBoundsException in KeyValueUtil.copyToNewKeyValue()	Major	wal
HBASE-26462	Should persist restoreAcl flag in the procedure state for CloneSnapshotProcedure and RestoreSnapshotProcedure	Critical	proc-v2, snapshots
HBASE-26535	[site, branch-2] DependencyManagement report is broken	Blocker	build, pom
HBASE-26533	KeyValueScanner might not be properly closed when using InternalScan.checkOnlyMemStore()	Minor	.
HBASE-26482	HMaster may clean wals that is replicating in rare cases	Critical	Replication
HBASE-26468	Region Server doesn't exit cleanly incase it crashes.	Major	regionserver
HBASE-25905	Shutdown of WAL stuck at waitForSafePoint	Blocker	regionserver, wal
HBASE-26455	TestStochasticLoadBalancerRegionReplicaWithRacks fails consistently	Major	Balancer
HBASE-26450	Server configuration will overwrite HStore configuration after using shell command 'update_config'	Minor	Compaction, conf, regionserver
HBASE-26476	Make DefaultMemStore extensible for HStore.memstore	Major	regionserver
HBASE-26465	MemStoreLAB may be released early when its SegmentScanner is scanning	Critical	regionserver
HBASE-26467	Wrong Cell Generated by MemStoreLABImpl.forceCopyOfBigCellInto when Cell size bigger than data chunk size	Critical	in-memory-compaction
HBASE-26463	Unreadable table names after HBASE-24605	Trivial	UI
HBASE-26438	Fix flaky test TestHStore.testCompactingMemStoreCellExceedInmemoryFlushSize	Major	test
HBASE-26436	check-aggregate-license error related to javadns after HADOOP-17317	Major	build, hadoop3
HBASE-26311	Balancer gets stuck in cohosted replica distribution	Major	Balancer
HBASE-26384	Segment already flushed to hfile may still be remained in CompactingMemStore	Major	in-memory-compaction
HBASE-26414	Tracing INSTRUMENTATION_NAME is incorrect	Blocker	tracing
HBASE-26410	Fix HBase TestCanaryTool for Java17	Major	java
HBASE-26429	HeapMemoryManager fails memstore flushes with NPE if enabled	Major	Operability, regionserver
HBASE-26404	Update javadoc for CellUtil#createCell with tags methods.	Major	.
HBASE-26398	CellCounter fails for large tables filling up local disk	Minor	mapreduce
HBASE-26190	High rate logging of BucketAllocatorException: Allocation too big	Major	BucketCache, Operability
HBASE-26392	Update ClassSize.BYTE_BUFFER for JDK17	Major	java, util
HBASE-26394	Cache in RSRpcServices.executeProcedures does not take effect	Major	.
HBASE-26385	Clear CellScanner when replay	Major	regionserver, rpc
HBASE-26383	HBCK incorrectly reports inconsistencies for recently split regions following a master failover	Critical	master
HBASE-26371	Prioritize meta region move over other region moves in region_mover	Major	.
HBASE-26361	Enable OpenTelemetry to be used from developer sandbox	Major	tracing
HBASE-26364	TestThriftServer is failing 100% in our flaky test job	Major	test, Thrift
HBASE-26350	Missing server side debugging on failed SASL handshake	Minor	.
HBASE-26344	Fix Bug for MultiByteBuff.put(int, byte)	Major	.
HBASE-26312	Shell scan fails with timestamp	Major	shell, test
HBASE-24601	Change default Hfile storage policy from HOT to NONE for HDFS	Major	HFile
HBASE-26295	BucketCache could not free BucketEntry which restored from persistence file	Major	BucketCache
HBASE-26289	Hbase scan setMaxResultsPerColumnFamily not giving right results	Major	regionserver
HBASE-26299	Fix TestHTableTracing.testTableClose for nightly build of branch-2	Major	test, tracing
HBASE-26238	OOME in VerifyReplication for the table contains rows with 10M+ cells	Major	Client, Replication
HBASE-26297	Balancer run is improperly triggered by accuracy error of double comparison	Major	Balancer
HBASE-26178	Improve data structure and algorithm for BalanceClusterState to improve computation speed for large cluster	Major	Balancer, Performance
HBASE-26274	Create an option to reintroduce BlockCache to mapreduce job	Major	BlockCache, HFile, mapreduce
HBASE-26261	Store configuration loss when use update_config	Minor	.
HBASE-26281	DBB got from BucketCache would be freed unexpectedly before RPC completed	Critical	BucketCache
HBASE-26197	Fix some obvious bugs in MultiByteBuff.put	Major	.
HBASE-26106	AbstractFSWALProvider#getArchivedLogPath doesn't look for wal file in all oldWALs directory.	Critical	wal
HBASE-26205	TableMRUtil#initCredentialsForCluster should use specified conf for UserProvider	Major	mapreduce
HBASE-26210	HBase Write should be doomed to hang when cell size exceeds InmemoryFlushSize for CompactingMemStore	Critical	in-memory-compaction
HBASE-26244	Avoid trim the error stack trace when running UT with maven	Major	.
HBASE-25588	Excessive logging of "hbase.zookeeper.useMulti is deprecated. Default to true always."	Minor	logging, Operability, Replication
HBASE-26232	SEEK_NEXT_USING_HINT is ignored on reversed Scans	Critical	Filters, scan
HBASE-26204	VerifyReplication should obtain token for peerQuorumAddress too	Major	.
HBASE-26219	Negative time is logged while waiting on regionservers	Trivial	.
HBASE-26087	JVM crash when displaying RPC params by MonitoredRPCHandler	Major	UI
HBASE-24570	connection#close throws NPE	Minor	Client
HBASE-26200	Undo 'HBASE-25165 Change 'State time' in UI so sorts (#2508)' in favor of HBASE-24652	Major	UI
HBASE-26196	Support configuration override for remote cluster of HFileOutputFormat locality sensitive	Major	mapreduce
HBASE-26026	HBase Write may be stuck forever when using CompactingMemStore	Critical	in-memory-compaction
HBASE-26155	JVM crash when scan	Major	Scanners
HBASE-26176	Correct regex in hbase-personality.sh	Minor	build
HBASE-26142	NullPointerException when set 'hbase.hregion.memstore.mslab.indexchunksize.percent' to zero	Critical	.
HBASE-25651	NORMALIZER_TARGET_REGION_SIZE needs a unit in its name	Major	Normalizer
HBASE-26166	table list in master ui has a minor bug	Minor	UI
HBASE-26114	when “hbase.mob.compaction.threads.max” is set to a negative number, HMaster cannot start normally	Minor	master
HBASE-26120	New replication gets stuck or data loss when multiwal groups more than 10	Critical	Replication
HBASE-26001	When turn on access control, the cell level TTL of Increment and Append operations is invalid.	Minor	Coprocessors
HBASE-24984	WAL corruption due to early DBBs re-use when Durability.ASYNC_WAL is used with multi operation	Critical	rpc, wal
HBASE-26088	conn.getBufferedMutator(tableName) leaks thread executors and other problems	Critical	Client
HBASE-25973	Balancer should explain progress in a better way in log	Major	Balancer
HBASE-26086	TestHRegionReplayEvents do not pass in branch-2 and throws NullPointerException	Minor	.
HBASE-26036	DBB released too early and dirty data for some operations	Critical	rpc
HBASE-26068	The last assertion in TestHStore.testRefreshStoreFilesNotChanged is wrong	Major	test
HBASE-22923	hbase:meta is assigned to localhost when we downgrade the hbase version	Major	.
HBASE-26063	The current checkcompatibility.py script can not compare master and rel/2.0.0	Blocker	scripts
HBASE-26030	hbase-cleanup.sh did not clean the wal dir if hbase.wal.dir configured individually	Major	scripts
HBASE-26035	Redundant null check in the compareTo function	Minor	metrics, Performance
HBASE-25902	Add missing CFs in meta during HBase 1 to 2.3+ Upgrade	Critical	meta, Operability
HBASE-26028	The view as json page shows exception when using TinyLfuBlockCache	Major	UI
HBASE-26029	It is not reliable to use nodeDeleted event to track region server's death	Critical	Replication, Zookeeper
HBASE-26039	TestReplicationKillRS is useless after HBASE-23956	Major	Replication, test
HBASE-25980	Master table.jsp pointed at meta throws 500 when no all replicas are online	Major	master, meta replicas, UI
HBASE-26013	Get operations readRows metrics becomes zero after HBASE-25677	Minor	metrics
HBASE-25966	Fix typo in NOTICE.vm	Major	build, community
HBASE-25877	Add access check for compactionSwitch	Major	security
HBASE-25698	Persistent IllegalReferenceCountException at scanner open when using TinyLfuBlockCache	Major	BucketCache, HFile, Scanners
HBASE-25984	FSHLog WAL lockup with sync future reuse [RS deadlock]	Critical	regionserver, wal
HBASE-25994	Active WAL tailing fails when WAL value compression is enabled	Major	.
HBASE-25924	Seeing a spike in uncleanlyClosedWALs metric.	Major	Replication, wal
HBASE-25967	The readRequestsCount does not calculate when the outResults is empty	Major	metrics
HBASE-25981	JVM crash when displaying regionserver UI	Major	rpc, UI
HBASE-25930	Thrift does not support requests in Kerberos environment	Major	Thrift
HBASE-25929	RegionServer JVM crash when compaction	Critical	Compaction
HBASE-25932	TestWALEntryStream#testCleanClosedWALs test is failing.	Major	metrics, Replication, wal
HBASE-25903	ReadOnlyZKClient APIs - CompletableFuture.get() calls can cause threads to hang forver when ZK client create throws Non IOException	Major	.
HBASE-25927	Fix the log messages by not stringifying the exceptions in log	Minor	logging
HBASE-25938	The SnapshotOfRegionAssignmentFromMeta.initialize call in FavoredNodeLoadBalancer is just a dummy one	Major	Balancer, FavoredNodes
HBASE-25861	Correct the usage of Configuration#addDeprecation	Major	.
HBASE-25928	TestHBaseConfiguration#testDeprecatedConfigurations is broken with Hadoop 3.3	Major	.
HBASE-25898	RS getting aborted due to NPE in Replication WALEntryStream	Critical	Replication
HBASE-25875	RegionServer failed to start due to IllegalThreadStateException in AuthenticationTokenSecretManager.start	Major	.
HBASE-25513	When the table is turned on normalize, the first region may not be merged even the size is 0	Major	Normalizer
HBASE-25892	'False' should be 'True' in auditlog of listLabels	Major	logging, security
HBASE-25817	Memory leak from thrift server hashMap	Minor	Thrift
HBASE-25869	WAL value compression	Major	Operability, wal
HBASE-25827	Per Cell TTL tags get duplicated with increments causing tags length overflow	Critical	regionserver
HBASE-25897	TestRetainAssignmentOnRestart is flaky after HBASE-25032	Major	Region Assignment
HBASE-25867	Extra doc around ITBLL	Minor	documentation
HBASE-25859	Reference class incorrectly parses the protobuf magic marker	Minor	regionserver
HBASE-25774	ServerManager.getOnlineServer may miss some region servers when refreshing state in some procedure implementations	Critical	Replication
HBASE-25837	TestRollingRestart is flaky	Major	test
HBASE-25850	Fix spotbugs warnings on branch-2	Major	Compaction, findbugs, mob
HBASE-25825	RSGroupBasedLoadBalancer.onConfigurationChange should chain the request to internal balancer	Major	Balancer
HBASE-25792	Filter out o.a.hadoop.thirdparty building shaded jars	Major	shading
HBASE-25777	Fix wrong initialization value in StressAssignmentManagerMonkeyFactory	Major	integration tests
HBASE-25735	Add target Region to connection exceptions	Major	rpc
HBASE-25717	RegionServer aborted due to ClassCastException	Major	.
HBASE-25743	Retry REQUESTTIMEOUT KeeperExceptions from ZK	Major	Zookeeper
HBASE-25726	MoveCostFunction is not included in the list of cost functions for StochasticLoadBalancer	Major	Balancer
HBASE-25692	Failure to instantiate WALCellCodec leaks socket in replication	Major	Replication
HBASE-25568	Upgrade Thrift jar to fix CVE-2020-13949	Critical	Thrift
HBASE-25693	NPE getting metrics from standby masters (MetricsMasterWrapperImpl.getMergePlanCount)	Major	master
HBASE-25685	asyncprofiler2.0 no longer supports svg; wants html	Major	.
HBASE-25594	graceful_stop.sh fails to unload regions when ran at localhost	Minor	.
HBASE-25674	RegionInfo.parseFrom(DataInputStream) sometimes fails to read the protobuf magic marker	Minor	Client
HBASE-25673	Wrong log regarding current active master at ZKLeaderManager#waitToBecomeLeader	Minor	.
HBASE-25595	TestLruBlockCache.testBackgroundEvictionThread is flaky	Major	.
HBASE-25662	Fix spotbugs warning in RoundRobinTableInputFormat	Major	findbugs
HBASE-25657	Fix spotbugs warnings after upgrading spotbugs to 4.x	Major	findbugs
HBASE-25646	Possible Resource Leak in CatalogJanitor	Major	master
HBASE-25626	Possible Resource Leak in HeterogeneousRegionCountCostFunction	Major	.
HBASE-25644	Scan#setSmall blindly sets ReadType as PREAD	Critical	.
HBASE-25609	There is a problem with the SPLITS_FILE in the HBase shell statement	Minor	shell
HBASE-25385	TestCurrentHourProvider fails if the latest timezone changes are not present	Blocker	.
HBASE-25596	Fix NPE in ReplicationSourceManager as well as avoid permanently unreplicated data due to EOFException from WAL	Critical	Replication
HBASE-25367	Sort broken after Change 'State time' in UI	Major	UI
HBASE-25421	There is no limit on the column family length when creating a table	Major	Client
HBASE-25371	When openRegion fails during initial verification(before initializing and setting seq num), exception is observed during region close.	Major	Region Assignment
HBASE-25611	ExportSnapshot chmod flag uses value as decimal	Major	.
HBASE-25586	Fix HBASE-22492 on branch-2 (SASL GapToken)	Major	rpc
HBASE-25556	Frequent replication "Encountered a malformed edit" warnings	Minor	Operability, Replication
HBASE-25575	Should validate Puts in RowMutations	Minor	Client
HBASE-25571	Compilation error in branch-2 after HBASE-25364	Major	.
HBASE-25512	May throw StringIndexOutOfBoundsException when construct illegal tablename error	Trivial	.
HBASE-25560	Remove unused parameter named peerId in the constructor method of CatalogReplicationSourcePeer	Major	.
HBASE-25543	When configuration "hadoop.security.authorization" is set to false, the system will still try to authorize an RPC and raise AccessDeniedException	Minor	IPC/RPC
HBASE-25554	NPE when init RegionMover	Major	.
HBASE-25523	Region normalizer chore thread is getting killed	Major	Normalizer
HBASE-25533	The metadata of the table and family should not be an empty string	Major	.
HBASE-25478	Implement retries when enabling tables in TestRegionReplicaReplicationEndpoint	Minor	.
HBASE-25497	move_namespaces_rsgroup should change hbase.rsgroup.name config in NamespaceDescriptor	Major	.
HBASE-25356	HBaseAdmin#getRegion() needs to filter out non-regionName and non-encodedRegionName	Major	shell
HBASE-25279	Non-daemon thread in ZKWatcher	Critical	Zookeeper
HBASE-25503	HBase code download is failing on windows with invalid path error	Major	.
HBASE-24813	ReplicationSource should clear buffer usage on ReplicationSourceManager upon termination	Major	Replication
HBASE-25459	WAL can't be cleaned in some scenes	Major	.
HBASE-25434	SlowDelete & SlowPut metric value should use updateDelete & updatePut	Major	regionserver
HBASE-25441	add security check for some APIs in RSRpcServices	Critical	.
HBASE-25432	we should add security checks for setTableStateInMeta and fixMeta	Blocker	.
HBASE-25445	Old WALs archive fails in procedure based WAL split	Critical	wal
HBASE-25287	Forgetting to unbuffer streams results in many CLOSE_WAIT sockets when loading files	Major	.
HBASE-25447	remoteProc is suspended due to OOM ERROR	Major	proc-v2
HBASE-24755	[LOG][RSGroup]Error message is confusing while adding a offline RS to rsgroup	Major	rsgroup
HBASE-25463	Fix comment error	Minor	shell
HBASE-25457	Possible race in AsyncConnectionImpl between getChoreService and close	Major	Client
HBASE-25456	setRegionStateInMeta need security check	Critical	.
HBASE-25383	HBase doesn't update and remove the peer config from hbase.replication.source.custom.walentryfilters if the config is already set on the peer.	Major	.
HBASE-25404	Procedures table Id under master web UI gets word break to single character	Minor	UI
HBASE-25277	postScannerFilterRow impacts Scan performance a lot in HBase 2.x	Critical	Coprocessors, scan
HBASE-25365	The log in move_servers_rsgroup is incorrect	Minor	.
HBASE-25372	Fix typo in ban-jersey section of the enforcer plugin in pom.xml	Major	build
HBASE-25361	[Flakey Tests] branch-2 TestMetaRegionLocationCache.testStandByMetaLocations	Major	flakies
HBASE-25292	Improve InetSocketAddress usage discipline	Major	Client, HFile

TESTS:

JIRA	Summary	Priority	Component
HBASE-27161	Improve TestMultiRespectsLimits	Minor	test
HBASE-27051	TestReplicationSource.testReplicationSourceInitializingMetric is flaky	Minor	test
HBASE-27039	Some methods of MasterRegion should be annotated for testing only	Minor	master
HBASE-27054	TestStochasticLoadBalancerRegionReplicaLargeCluster.testRegionReplicasOnLargeCluster is flaky	Major	test
HBASE-27052	TestAsyncTableScanner.testScanWrongColumnFamily is flaky	Major	test
HBASE-27050	Support unit test pattern matching again	Minor	test
HBASE-26989	TestStochasticLoadBalancer has some slow methods, and inconsistent set, reset, unset of configuration	Minor	Balancer, test
HBASE-26689	Backport HBASE-24443 Refactor TestCustomSaslAuthenticationProvider	Minor	test
HBASE-26542	Apply a `package` to test protobuf files	Minor	Protobufs, test
HBASE-26349	Improve recent change to IntegrationTestLoadCommonCrawl	Minor	integration tests, test
HBASE-26335	Minor improvements to IntegrationTestLoadCommonCrawl	Minor	integration tests, test
HBASE-26272	TestTableMapReduceUtil failure in branch-2	Major	test
HBASE-26185	Fix TestMaster#testMoveRegionWhenNotInitialized with hbase.min.version.move.system.tables	Minor	.
HBASE-25910	Fix TestClusterPortAssignment.testClusterPortAssignment test and re-enable it.	Minor	flakies, test
HBASE-25824	IntegrationTestLoadCommonCrawl	Minor	integration tests
HBASE-25561	Added ignored test for async connection that runs retries just so can check how long it takes and that retrying is happening	Trivial	test
HBASE-25334	TestRSGroupsFallback.testFallback is flaky	Major	.
HBASE-25370	Fix flaky test TestClassFinder#testClassFinderDefaultsToOwnPackage	Major	test

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-27206	Clean up error-prone findings in hbase-common	Major	.
HBASE-27234	Clean up error-prone findings in hbase-examples	Major	.
HBASE-27252	Clean up error-prone findings in hbase-it	Major	.
HBASE-26969	Eliminate MOB renames when SFT is enabled	Major	mob
HBASE-27301	Add Delete addFamilyVersion timestamp verify	Minor	Client
HBASE-27293	Remove jenkins and personality scripts support for 1.x	Major	scripts
HBASE-27201	Clean up error-prone findings in hbase-backup	Major	.
HBASE-27240	Clean up error-prone findings in hbase-http	Major	.
HBASE-27203	Clean up error-prone findings in hbase-client	Major	.
HBASE-27236	Clean up error-prone findings in hbase-hbtop	Major	.
HBASE-27210	Clean up error-prone findings in hbase-endpoint	Major	.
HBASE-27235	Clean up error-prone findings in hbase-hadoop-compat	Major	.
HBASE-27220	Apply the spotless format change in HBASE-27208 to our code base	Major	.
HBASE-27202	Clean up error-prone findings in hbase-balancer	Major	.
HBASE-27200	Clean up error-prone findings in hbase-archetypes	Major	.
HBASE-27194	Add test coverage for SimpleRpcServer	Major	.
HBASE-23330	Expose cluster ID for clients using it for delegation token based auth	Major	Client, master
HBASE-27166	WAL value compression minor improvements	Minor	.
HBASE-27111	Make Netty channel bytebuf allocator configurable	Major	.
HBASE-26167	Allow users to not start zookeeper and dfs cluster when using TestingHBaseCluster	Major	test
HBASE-26366	Provide meaningful parent spans to ZK interactions	Major	tracing
HBASE-26933	Remove all ref guide stuff on branch other than master	Major	documentation
HBASE-27006	cordon off large ci worker nodes	Major	.
HBASE-26855	Delete unnecessary dependency on jaxb-runtime jar	Major	.
HBASE-27024	The User API and Developer API links are broken on hbase.apache.org	Major	website
HBASE-27045	Disable TestClusterScopeQuotaThrottle	Major	test
HBASE-26986	Trace a one-shot execution of a Master procedure	Major	.
HBASE-26999	HStore should try write WAL compaction marker before replacing compacted files in StoreEngine	Major	.
HBASE-26330	Document new provided compression codecs	Blocker	.
HBASE-26995	Remove ref guide check in pre commit and nightly for branches other than master	Major	build, scripts
HBASE-26648	Improve fidelity of RegionLocator spans	Major	tracing
HBASE-26899	Run spotless:apply	Major	.
HBASE-26932	Skip generating ref guide when running 'mvn site' on branch other than master	Major	build, pom
HBASE-25058	Export necessary modules when running under JDK11	Major	Performance, rpc
HBASE-26928	Fix several indentation problems	Major	.
HBASE-26922	Fix LineLength warnings as much as possible if it can not be fixed by spotless	Major	.
HBASE-26929	Upgrade surefire plugin to 3.0.0-M6	Major	pom, test
HBASE-26927	Add snapshot scanner UT with SFT and some cleanups to TestTableSnapshotScanner	Major	.
HBASE-26916	Fix missing braces warnings in DefaultVisibilityExpressionResolver	Major	.
HBASE-26919	Rewrite the counting rows part in TestFromClientSide4	Major	test
HBASE-26920	Fix missing braces warnings in TestProcedureMember	Major	test
HBASE-26921	Rewrite the counting cells part in TestMultiVersions	Major	test
HBASE-26545	Implement tracing of scan	Major	tracing
HBASE-26531	Trace coprocessor exec endpoints	Major	.
HBASE-25896	Implement a Region Visualization on Master WebUI	Major	.
HBASE-25895	Implement a Cluster Metrics JSON endpoint	Major	.
HBASE-26824	TestHBaseTestingUtil.testResolvePortConflict failing after HBASE-26582	Major	.
HBASE-26582	Prune use of Random and SecureRandom objects	Minor	.
HBASE-26764	Implement generic exception support for TraceUtil methods over Callables and Runnables	Major	.
HBASE-26759	Fix trace continuity through CallRunner	Major	.
HBASE-26640	Reimplement master local region initialization to better work with SFT	Major	master, RegionProcedureStore
HBASE-26673	Implement a shell command for change SFT implementation	Major	shell
HBASE-26434	Compact L0 files for cold regions using StripeCompactionPolicy	Major	.
HBASE-26749	Migrate HBase main pre commit job to ci-hbase	Major	.
HBASE-26697	Migrate HBase Nightly HBase-Flaky-Tests and HBase-Find-Flaky-Tests to ci-hbase	Major	jenkins
HBASE-26521	Name RPC spans as `$package.$service/$method`	Major	.
HBASE-26747	Use python2 instead of python in our python scripts	Major	jenkins
HBASE-26472	Adhere to semantic conventions regarding table data operations	Major	.
HBASE-26473	Introduce `db.hbase.container_operations` span attribute	Major	.
HBASE-26474	Implement connection-level attributes	Major	.
HBASE-26520	Remove use of `db.hbase.namespace` tracing attribute	Major	.
HBASE-26397	Display the excluded datanodes on regionserver UI	Major	.
HBASE-24870	Ignore TestAsyncTableRSCrashPublish	Major	.
HBASE-26304	Reflect out-of-band locality improvements in served requests	Major	.
HBASE-26471	Move tracing semantic attributes to their own class	Major	.
HBASE-26470	Use openlabtesting protoc on linux arm64 in HBASE 2.x	Major	build
HBASE-26327	Replicas cohosted on a rack shouldn't keep triggering Balancer	Major	Balancer
HBASE-26308	Sum of multiplier of cost functions is not populated properly when we have a shortcut for trigger	Critical	Balancer
HBASE-26430	Increase DefaultHeapMemoryTuner log level	Minor	regionserver
HBASE-26353	Support loadable dictionaries in hbase-compression-zstd	Minor	.
HBASE-26319	Make flaky find job track more builds	Major	flakies, jenkins
HBASE-26390	Upload src tarball to nightlies for nightly jobs	Major	jenkins, scripts
HBASE-26382	Use gen_redirect_html for linking flaky test logs	Major	jenkins, scripts, test
HBASE-26362	Upload mvn site artifacts for nightly build to nightlies	Major	jenkins, scripts
HBASE-26316	Per-table or per-CF compression codec setting overrides	Minor	HFile, Operability
HBASE-26360	Use gen_redirect_html for linking test logs	Major	jenkins, scripts
HBASE-26341	Upload dashboard html for flaky find job to nightlies	Major	flakies, jenkins, scripts
HBASE-24833	Bootstrap should not delete the META table directory if it's not partial	Major	.
HBASE-26339	SshPublisher will skip uploading artifacts if the build is failure	Major	jenkins, scripts
HBASE-26324	Reuse compressors and decompressors in WAL CompressionContext	Minor	wal
HBASE-26317	Publish the test logs for pre commit jenkins job to nightlies	Major	jenkins, scripts
HBASE-26313	Publish the test logs for our nightly jobs to nightlies.apache.org	Major	jenkins, scripts
HBASE-26318	Publish test logs for flaky jobs to nightlies	Major	flakies, jenkins
HBASE-26259	Fallback support to pure Java compression	Major	Performance
HBASE-26294	Backport "HBASE-26181 Region server and master could use itself as ConnectionRegistry" to branch-2	Major	master, regionserver
HBASE-26293	Use reservoir sampling when selecting bootstrap nodes	Major	master, regionserver
HBASE-26277	Revert 26240, Apply InterfaceAudience.Private to BalanceResponse$Builder	Minor	.
HBASE-26240	Set BalanceRequest$Builder to InterfaceAudience.Private	Trivial	.
HBASE-26157	Expose some IA.LimitedPrivate interface in TestingHBaseCluster	Major	API, test
HBASE-26235	We could start RegionServerTracker before becoming active master	Major	master, Zookeeper
HBASE-26216	Move HRegionServer.abort(String) to Abortable as a default method	Major	API, regionserver
HBASE-26189	Reduce log level of CompactionProgress notice to DEBUG	Minor	Compaction
HBASE-26168	Backport HBASE-25811 for fixing nightly tests with error of `NoClassDefFoundError: io/opentelemetry/api/GlobalOpenTelemetry`	Major	tracing
HBASE-26227	Forward port HBASE-26223 test code to branch-2.4+	Major	test
HBASE-26140	Backport HBASE-25778 "The tracinig implementation for AsyncConnectionImpl.getHbck is incorrect" to branch-2	Major	tracing
HBASE-26139	Backport HBASE-23762 "Add documentation on how to enable and view tracing with OpenTelemetry" to branch-2	Major	tracing
HBASE-26138	Backport HBASE-25733 "Upgrade opentelemetry to 1.0.1" to branch-2	Major	tracing
HBASE-26137	Backport HBASE-25732 "Change the command line argument for tracing after upgrading opentelemtry to 1.0.0" to branch-2	Major	tracing
HBASE-26180	Introduce a initial refresh interval for RpcConnectionRegistry	Major	Client
HBASE-26215	The backup master status page should use ActiveMasterManager instead of MasterAddressTracker	Major	master, UI
HBASE-26136	Backport HBASE-25723 "Temporarily remove the trace support for RegionScanner.next" to branch-2	Major	tracing
HBASE-26135	Backport HBASE-25616 "Upgrade opentelemetry to 1.0.0" to branch-2	Major	tracing
HBASE-26173	Return only a sub set of region servers as bootstrap nodes	Major	Client
HBASE-26182	Allow disabling refresh of connection registry endpoint	Major	Client
HBASE-26134	Backport HBASE-25617 "Revisit the span names" to branch-2	Major	.
HBASE-26133	Backport HBASE-25591 "Upgrade opentelemetry to 0.17.1" to branch-2	Major	.
HBASE-26132	Backport HBASE-25535 "Set span kind to CLIENT in AbstractRpcClient" to branch-2	Major	.
HBASE-26131	Backport HBASE-25484 "Add trace support for WAL sync" to branch-2	Major	.
HBASE-26172	Deprecate MasterRegistry	Major	Client
HBASE-24337	Backport HBASE-23968 to branch-2	Minor	.
HBASE-26130	Backport HBASE-25455 "Add trace support for HRegion read/write operation" to branch-2	Major	.
HBASE-26129	Backport HBASE-25481 "Add host and port attribute when tracing rpc call at client side" to branch-2	Major	.
HBASE-26128	Backport HBASE-25454 "Add trace support for connection registry" to branch-2	Major	tracing
HBASE-26150	Let region server also carry ClientMetaService	Major	Client, meta
HBASE-26127	Backport HBASE-23898 "Add trace support for simple apis in async client" to branch-2	Major	tracing
HBASE-26126	Backport HBASE-25424 "Find a way to config OpenTelemetry tracing without directly depending on opentelemetry-sdk" to branch-2	Major	.
HBASE-26125	Backport HBASE-25401 "Add trace support for async call in rpc client" to branch-2	Major	tracing
HBASE-26151	Reimplement MasterAddressTracker to also cache backup master addresses	Major	Client, Zookeeper
HBASE-26098	Support passing a customized Configuration object when creating TestingHBaseCluster	Major	API, test
HBASE-26124	Backport HBASE-25373 "Remove HTrace completely in code base and try to make use of OpenTelemetry" to branch-2	Major	tracing
HBASE-26093	Replication is stuck due to zero length wal file in oldWALs directory [master/branch-2]	Major	.
HBASE-24734	RegionInfo#containsRange should support check meta table	Major	HFile, MTTR
HBASE-25739	TableSkewCostFunction need to use aggregated deviation	Major	Balancer, master
HBASE-26080	Implement a new mini cluster class for end users	Major	API, test
HBASE-26050	Remove the reflection used in FSUtils.isInSafeMode	Major	.
HBASE-26041	Replace PrintThreadInfoHelper with HBase's own ReflectionUtils.printThreadInfo()	Major	util
HBASE-26019	Remove reflections used in HBaseConfiguration.getPassword()	Major	.
HBASE-25992	Polish the ReplicationSourceWALReader code for 2.x after HBASE-25596	Major	Replication
HBASE-25976	Implement a master based ReplicationTracker	Major	Replication
HBASE-25989	FanOutOneBlockAsyncDFSOutput using shaded protobuf in hdfs 3.3+	Major	.
HBASE-25969	Cleanup netty-all transitive includes	Major	.
HBASE-25963	HBaseCluster should be marked as IA.Public	Major	API
HBASE-25911	Fix uses of System.currentTimeMillis (should be EnvironmentEdgeManager.currentTime)	Minor	.
HBASE-25941	TestRESTServerSSL fails because of jdk bug	Major	test
HBASE-25940	Update Compression/TestCompressionTest: LZ4, SNAPPY, LZO	Major	.
HBASE-25718	Backport HBASE-25705 to branch-2	Minor	rsgroup
HBASE-25926	Cleanup MetaTableAccessor references in FavoredNodeBalancer related code	Major	Balancer, FavoredNodes, meta
HBASE-25791	UI of master-status to show a recent history of that why balancer was rejected to run	Major	Balancer, master, UI
HBASE-25894	Improve the performance for region load and region count related cost functions	Major	Balancer, Performance
HBASE-25873	Refactor and cleanup the code for CostFunction	Major	Balancer, Performance
HBASE-25872	Add documentation for LoadBalancer about synchronization	Major	Balancer, documentation
HBASE-25883	The regionFinder and rackManager fields in BaseLoadBalancer should be volatile	Major	Balancer
HBASE-25852	Move all the intialization work of LoadBalancer implementation to initialize method	Major	Balancer
HBASE-25876	Add retry if we fail to read all bytes of the protobuf magic marker	Trivial	io
HBASE-25790	NamedQueue 'BalancerRejection' for recent history of balancer skipping	Major	Balancer, master
HBASE-25854	Remove redundant AM in-memory state changes in CatalogJanitor	Major	.
HBASE-25851	Make LoadBalancer not extend Configurable interface	Major	Balancer
HBASE-25847	More DEBUG and TRACE level logging in CatalogJanitor and HbckChore	Minor	.
HBASE-25834	Remove balanceTable method from LoadBalancer interface	Major	Balancer
HBASE-25838	Use double instead of Double in StochasticLoadBalancer	Major	Balancer, Performance
HBASE-25835	Ignore duplicate split requests from regionserver reports	Major	.
HBASE-25836	RegionStates#getAssignmentsForBalancer should only care about OPEN or OPENING regions	Major	.
HBASE-25840	CatalogJanitor warns about skipping gc of regions during RIT, but does not actually skip	Minor	.
HBASE-25819	Fix style issues for StochasticLoadBalancer	Major	Balancer
HBASE-25802	Miscellaneous style improvements for load balancer related classes	Major	Balancer
HBASE-25793	Move BaseLoadBalancer.Cluster to a separated file	Major	Balancer
HBASE-25775	Use a special balancer to deal with maintenance mode	Major	Balancer
HBASE-25687	Backport "HBASE-25681 Add a switch for server/table queryMeter" to branch-2 and branch-1	Major	.
HBASE-25199	Remove HStore#getStoreHomedir	Minor	.
HBASE-25696	Need to initialize SLF4JBridgeHandler in jul-to-slf4j for redirecting jul to slf4j	Major	logging
HBASE-25695	Link to the filter on hbase:meta from user tables panel on master page	Major	UI
HBASE-25629	Reimplement TestCurrentHourProvider to not depend on unstable TZs	Major	test
HBASE-25671	Backport HBASE-25608 to branch-2	Major	.
HBASE-25677	Server+table counters on each scan #nextRaw invocation becomes a bottleneck when heavy load	Major	metrics
HBASE-25667	Remove RSGroup test addition made in parent; depends on functionality not in old branches	Major	.
HBASE-25550	More readable Competition Time	Minor	UI
HBASE-24900	Make retain assignment configurable during SCP	Major	amv2
HBASE-25509	ChoreService.cancelChore will not call ScheduledChore.cleanup which may lead to resource leak	Major	util
HBASE-25336	Use Address instead of InetSocketAddress in RpcClient implementation	Major	Client, rpc
HBASE-25353	[Flakey Tests] branch-2 TestShutdownBackupMaster	Major	flakies

OTHER:

JIRA	Summary	Priority	Component
HBASE-13126	Provide alternate mini cluster classes other than HBTU for downstream users to write unit tests	Critical	API, test
HBASE-26245	Store region server list in master local region	Major	master, Zookeeper
HBASE-25934	Add username for RegionScannerHolder	Minor	.
HBASE-25826	Revisit the synchronization of balancer implementation	Major	Balancer
HBASE-26882	Backport "HBASE-26810 Add dynamic configuration support for system coprocessors" to branch-2	Major	Coprocessors, master, regionserver
HBASE-27294	Add new hadoop releases in our hadoop checks	Major	scripts
HBASE-27299	Bump minimum hadoop 2 version to 2.10.2	Major	hadoop2, security
HBASE-27221	Bump spotless version to 2.24.1	Major	build, pom
HBASE-27281	Add default implementation for Connection$getClusterId	Critical	Client
HBASE-27248	WALPrettyPrinter add print timestamp	Minor	tooling, wal
HBASE-27182	Rework tracing configuration	Major	scripts
HBASE-27148	Move minimum hadoop 3 support version to 3.2.3	Major	dependencies, hadoop3, security
HBASE-27175	Failure to cleanup WAL split dir log should be at INFO level	Minor	.
HBASE-27172	Upgrade OpenTelemetry dependency to 1.15.0	Major	build
HBASE-27141	Upgrade hbase-thirdparty dependency to 4.1.1	Critical	dependencies, security, thirdparty
HBASE-27108	Revert HBASE-25709	Blocker	.
HBASE-27102	Vacate the .idea folder in order to simplify spotless configuration	Major	build
HBASE-27023	Add protobuf to NOTICE file	Major	.
HBASE-27082	Change the return value of RSGroupInfo.getServers from SortedSet to Set to keep compatibility	Blocker	rsgroup
HBASE-26912	Bump checkstyle from 8.28 to 8.29	Minor	test
HBASE-26523	Upgrade hbase-thirdparty dependency to 4.0.1	Blocker	thirdparty
HBASE-26892	Add spotless:check in our pre commit general check	Major	jenkins
HBASE-26906	Remove duplicate dependency declaration	Major	build
HBASE-26903	Bump httpclient from 4.5.3 to 4.5.13	Minor	.
HBASE-26902	Bump bcprov-jdk15on from 1.60 to 1.67	Minor	.
HBASE-26834	Adapt ConnectionRule for both sync and async connections	Major	test
HBASE-26861	Fix flaky TestSnapshotFromMaster.testSnapshotHFileArchiving	Major	snapshots, test
HBASE-26802	Backport the log4j2 changes to branch-2	Blocker	logging
HBASE-26819	Minor code cleanup in and around RpcScheduler	Minor	IPC/RPC
HBASE-26817	Mark RpcExecutor as IA.LimitedPrivate COPROC and PHOENIX	Major	compatibility
HBASE-26782	Minor code cleanup in and around RpcExecutor	Minor	IPC/RPC
HBASE-26760	LICENSE handling should not allow non-aggregated "apache-2.0"	Minor	community
HBASE-26691	Replacing log4j with reload4j for branch-2.x	Critical	logging
HBASE-26788	Disable Checks API callback from test results in PRs	Major	build
HBASE-26622	Update to error-prone 2.10	Major	.
HBASE-26663	Upgrade Maven Enforcer Plugin	Major	build
HBASE-25918	Upgrade hbase-thirdparty dependency to 3.5.1	Critical	dependencies
HBASE-26719	Remove 'patch' file added as part of commit for HBASE-25973	Minor	.
HBASE-26614	Refactor code related to "dump"ing ZK nodes	Major	Zookeeper
HBASE-26551	Add FastPath feature to HBase RWQueueRpcExecutor	Major	rpc, Scheduler
HBASE-26616	Refactor code related to ZooKeeper authentication	Major	Zookeeper
HBASE-26631	Upgrade junit to 4.13.2	Major	security, test
HBASE-26564	Retire the method visitLogEntryBeforeWrite without RegionInfo in WALActionListner	Minor	wal
HBASE-26566	Optimize encodeNumeric in OrderedBytes	Major	Performance
HBASE-26580	The message of StoreTooBusy is confused	Trivial	logging, regionserver
HBASE-26549	hbaseprotoc plugin should initialize maven	Major	jenkins
HBASE-26490	Add builder for class ReplicationLoadSink	Minor	Client
HBASE-26444	BucketCacheWriter should log only the BucketAllocatorException message, not the full stack trace	Major	logging, Operability
HBASE-26443	Some BaseLoadBalancer log lines should be at DEBUG level	Major	logging, Operability
HBASE-26369	Fix checkstyle issues for HBase-common: KeyValue and ByteBufferUtils	Trivial	.
HBASE-26368	Fix checkstyle issues for HRegionserver	Trivial	.
HBASE-26329	Upgrade commons-io to 2.11.0	Major	dependencies
HBASE-26186	jenkins script for caching artifacts should verify cached file before relying on it	Major	build, integration tests
HBASE-26288	Revisit the usage of MetaTableLocator when HRegionServer.TEST_SKIP_REPORTING_TRANSITION is true	Major	meta, regionserver, test, Zookeeper
HBASE-26285	Remove MetaTableLocator usages in non-migration code	Major	meta, Zookeeper
HBASE-25853	Backport HBASE-22120 (Replace HTrace with OpenTelemetry) to branch-2	Major	tracing
HBASE-26152	Exclude javax.servlet:servlet-api in hbase-shaded-testing-util	Major	.
HBASE-25521	Change ChoreService and ScheduledChore to IA.Private	Major	util
HBASE-26015	Should implement getRegionServers(boolean) method in AsyncAdmin	Major	Admin, Client
HBASE-25920	Support Hadoop 3.3.1	Major	.
HBASE-25948	Remove deprecated ZK command 'rmr' in hbase-cleanup.sh	Major	scripts
HBASE-25884	NPE while getting Balancer decisions	Major	.
HBASE-25843	Move master http-related code into o.a.h.h.master.http	Minor	master
HBASE-25842	Move regionserver http-related code into o.a.h.h.regionserver.http	Minor	regionserver
HBASE-25779	HRegionServer#compactSplitThread should be private	Trivial	regionserver
HBASE-25755	Exclude tomcat-embed-core from libthrift	Critical	dependencies, Thrift
HBASE-25750	Upgrade RpcControllerFactory and HBaseRpcController from Private to LimitedPrivate(COPROC,PHOENIX)	Major	Coprocessors, phoenix, rpc
HBASE-25604	Upgrade spotbugs to 4.x	Major	build, findbugs
HBASE-25620	Increase timeout value for pre commit	Major	build, test
HBASE-25615	Upgrade java version in pre commit docker file	Major	build
HBASE-25083	make sure the next hbase 1.y release has Hadoop 2.10 as a minimum version	Major	documentation, hadoop2
HBASE-25474	Update HBase version to 2.5.0 in branch-2 pom.xml	Major	.
HBASE-25333	Add maven enforcer rule to ban VisibleForTesting imports	Major	build, pom
HBASE-25451	Upgrade commons-io to 2.8.0	Major	dependencies
HBASE-25452	Use MatcherAssert.assertThat instead of org.junit.Assert.assertThat	Major	test
HBASE-25400	[Flakey Tests] branch-2 TestRegionMoveAndAbandon	Major	.
HBASE-25389	[Flakey Tests] branch-2 TestMetaShutdownHandler	Major	flakies

Release 2.2.0 - Unreleased (as of 2019-06-11)

INCOMPATIBLE CHANGES:

JIRA	Summary	Priority	Component
HBASE-21991	Fix MetaMetrics issues - [Race condition, Faulty remove logic], few improvements	Major	Coprocessors, metrics
HBASE-22399	Change default hadoop-two.version to 2.8.x and remove the 2.7.x hadoop checks	Major	build, hadoop2
HBASE-21082	Reimplement assign/unassign related procedure metrics	Critical	amv2, metrics
HBASE-20587	Replace Jackson with shaded thirdparty gson	Major	dependencies
HBASE-21727	Simplify documentation around client timeout	Minor	.
HBASE-21684	Throw DNRIOE when connection or rpc client is closed	Major	asyncclient, Client
HBASE-21792	Mark HTableMultiplexer as deprecated and remove it in 3.0.0	Major	Client
HBASE-21657	PrivateCellUtil#estimatedSerializedSizeOf has been the bottleneck in 100% scan case.	Major	Performance
HBASE-21560	Return a new TableDescriptor for MasterObserver#preModifyTable to allow coprocessor modify the TableDescriptor	Major	Coprocessors
HBASE-21492	CellCodec Written To WAL Before It's Verified	Critical	wal
HBASE-21452	Illegal character in hbase counters group name	Major	spark
HBASE-21158	Empty qualifier cell should not be returned if it does not match QualifierFilter	Critical	Filters
HBASE-21223	[amv2] Remove abort_procedure from shell	Critical	amv2, hbck2, shell
HBASE-20881	Introduce a region transition procedure to handle all the state transition for a region	Major	amv2, proc-v2
HBASE-20884	Replace usage of our Base64 implementation with java.util.Base64	Major	.

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-22148	Provide an alternative to CellUtil.setTimestamp	Blocker	API, Coprocessors
HBASE-21815	Make isTrackingMetrics and getMetrics of ScannerContext public	Minor	.
HBASE-21926	Profiler servlet	Major	master, Operability, regionserver
HBASE-20886	[Auth] Support keytab login in hbase client	Critical	asyncclient, Client, security
HBASE-17942	Disable region splits and merges per table	Major	.
HBASE-21753	Support getting the locations for all the replicas of a region	Major	Client
HBASE-20636	Introduce two bloom filter type : ROWPREFIX_FIXED_LENGTH and ROWPREFIX_DELIMITED	Major	HFile, regionserver, Scanners
HBASE-20649	Validate HFiles do not have PREFIX_TREE DataBlockEncoding	Minor	Operability, tooling

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-22284	optimization StringBuilder.append of AbstractMemStore.toString	Trivial	.
HBASE-22523	Refactor RegionStates#getAssignmentsByTable to make it easy to understand	Major	.
HBASE-22511	More missing /rs-status links	Minor	UI
HBASE-22496	UnsafeAccess.unsafeCopy should not copy more than UNSAFE_COPY_THRESHOLD on each iteration	Major	.
HBASE-22488	Cleanup the explicit timeout value for test methods	Major	.
HBASE-22411	Refactor codes of moving reigons in RSGroup	Major	rsgroup
HBASE-22467	WebUI changes to enable Apache Knox UI proxying	Major	UI
HBASE-22474	Add --mvn-custom-repo parameter to yetus calls	Minor	.
HBASE-20305	Add option to SyncTable that skip deletes on target cluster	Minor	mapreduce
HBASE-21784	Dump replication queue should show list of wal files ordered chronologically	Major	Replication, tooling
HBASE-22384	Formatting issues in administration section of book	Minor	community, documentation
HBASE-21658	Should get the meta replica number from zk instead of config at client side	Critical	Client
HBASE-22365	Region may be opened on two RegionServers	Blocker	amv2
HBASE-22392	Remove extra/useless +	Trivial	.
HBASE-20494	Upgrade com.yammer.metrics dependency	Major	dependencies
HBASE-22358	Change rubocop configuration for method length	Minor	community, shell
HBASE-22379	Fix Markdown for "Voting on Release Candidates" in book	Minor	community, documentation
HBASE-22109	Update hbase shaded content checker after guava update in hadoop branch-3.0 to 27.0-jre	Minor	.
HBASE-22087	Update LICENSE/shading for the dependencies from the latest Hadoop trunk	Minor	hadoop3
HBASE-22341	Add explicit guidelines for removing deprecations in book	Major	API, community, documentation
HBASE-22225	Profiler tab on Master/RS UI not working w/o comprehensive message	Minor	UI
HBASE-22291	Fix recovery of recovered.edits files under root dir	Major	.
HBASE-22283	Print row and table information when failed to get region location	Major	Client, logging
HBASE-22296	Remove TestFromClientSide.testGetStartEndKeysWithRegionReplicas	Major	test
HBASE-22250	The same constants used in many places should be placed in constant classes	Minor	Client, conf, regionserver
HBASE-20586	SyncTable tool: Add support for cross-realm remote clusters	Major	mapreduce, Operability, Replication
HBASE-21257	misspelled words.[occured -> occurred]	Trivial	.
HBASE-22193	Add backoff when region failed open too many times	Major	.
HBASE-22188	Make TestSplitMerge more stable	Major	test
HBASE-22097	Modify the description of split command in shell	Trivial	shell
HBASE-21964	unset Quota by Throttle Type	Major	master
HBASE-22093	Combine TestRestoreSnapshotFromClientWithRegionReplicas to CloneSnapshotFromClientAfterSplittingRegionTestBase#testCloneSnapshotAfterSplittingRegion	Major	.
HBASE-22009	Improve RSGroupInfoManagerImpl#getDefaultServers()	Minor	rsgroup
HBASE-22032	KeyValue validation should check for null byte array	Major	.
HBASE-21667	Move to latest ASF Parent POM	Minor	build
HBASE-21810	bulkload support set hfile compression on client	Major	mapreduce
HBASE-21987	Simplify RSGroupInfoManagerImpl#flushConfig() for offline mode	Minor	rsgroup
HBASE-21871	Support to specify a peer table name in VerifyReplication tool	Major	.
HBASE-21255	[acl] Refactor TablePermission into three classes (Global, Namespace, Table)	Major	.
HBASE-21410	A helper page that help find all problematic regions and procedures	Major	.
HBASE-20734	Colocate recovered edits directory with hbase.wal.dir	Major	MTTR, Recovery, wal
HBASE-20401	Make `MAX_WAIT` and `waitIfNotFinished` in CleanerContext configurable	Minor	master
HBASE-21481	[acl] Superuser's permissions should not be granted or revoked by any non-su global admin	Major	.
HBASE-21967	Split TestServerCrashProcedure and TestServerCrashProcedureWithReplicas	Major	.
HBASE-21867	Support multi-threads in HFileArchiver	Major	.
HBASE-21932	Use Runtime.getRuntime().halt to terminate regionserver when abort timeout	Major	.
HBASE-21875	Change the retry logic in RSProcedureDispatcher to 'retry by default, only if xxx'	Major	proc-v2
HBASE-21780	Avoid a wide line on the RegionServer webUI for many ZooKeeper servers	Minor	UI, Usability
HBASE-21636	Enhance the shell scan command to support missing scanner specifications like ReadType, IsolationLevel etc.	Major	shell
HBASE-21857	Do not need to check clusterKey if replicationEndpoint is provided when adding a peer	Major	.
HBASE-21201	Support to run VerifyReplication MR tool without peerid	Major	hbase-operator-tools
HBASE-21816	Print source cluster replication config directory	Trivial	Replication
HBASE-19616	Review of LogCleaner Class	Minor	.
HBASE-21830	Backport HBASE-20577 (Make Log Level page design consistent with the design of other pages in UI) to branch-2	Major	UI, Usability
HBASE-21833	Use NettyAsyncFSWALConfigHelper.setEventLoopConfig to prevent creating too many netty event loop when executing TestHRegion	Minor	test
HBASE-21634	Print error message when user uses unacceptable values for LIMIT while setting quotas.	Minor	.
HBASE-21789	Rewrite MetaTableAccessor.multiMutate with Table.coprocessorService	Major	Client, Coprocessors
HBASE-21689	Make table/namespace specific current quota info available in shell(describe_namespace & describe)	Minor	.
HBASE-20215	Rename CollectionUtils to ConcurrentMapUtils	Trivial	.
HBASE-21720	metric to measure how actions are distributed to servers within a MultiAction	Minor	Client, metrics, monitoring
HBASE-21595	Print thread's information and stack traces when RS is aborting forcibly	Minor	regionserver
HBASE-20209	Do Not Use Both Map containsKey and get Methods in Replication Sink	Trivial	Replication
HBASE-21712	Make submit-patch.py python3 compatible	Minor	tooling
HBASE-21590	Optimize trySkipToNextColumn in StoreScanner a bit	Critical	Performance, Scanners
HBASE-21297	ModifyTableProcedure can throw TNDE instead of IOE in case of REGION_REPLICATION change	Minor	.
HBASE-21700	Simplify the implementation of RSGroupInfoManagerImpl	Major	rsgroup
HBASE-21694	Add append_peer_exclude_tableCFs and remove_peer_exclude_tableCFs shell commands	Major	.
HBASE-21645	Perform sanity check and disallow table creation/modification with region replication < 1	Minor	.
HBASE-21360	Disable printing of stack-trace in shell for quotas	Minor	shell
HBASE-21662	Add append_peer_exclude_namespaces and remove_peer_exclude_namespaces shell commands	Major	.
HBASE-21659	Avoid to load duplicate coprocessors in system config and table descriptor	Minor	.
HBASE-21642	CopyTable by reading snapshot and bulkloading will save a lot of time.	Major	.
HBASE-21643	Introduce two new region coprocessor method and deprecated postMutationBeforeWAL	Major	.
HBASE-21640	Remove the TODO when increment zero	Major	.
HBASE-21631	list_quotas should print human readable values for LIMIT	Minor	shell
HBASE-21635	Use maven enforcer to ban imports from illegal packages	Major	build
HBASE-21514	Refactor CacheConfig	Major	.
HBASE-21520	TestMultiColumnScanner cost long time when using ROWCOL bloom type	Major	test
HBASE-21554	Show replication endpoint classname for replication peer on master web UI	Minor	UI
HBASE-21549	Add shell command for serial replication peer	Major	.
HBASE-21283	Add new shell command 'rit' for listing regions in transition	Minor	Operability, shell
HBASE-21567	Allow overriding configs starting up the shell	Major	shell
HBASE-21413	Empty meta log doesn't get split when restart whole cluster	Major	.
HBASE-21524	Unnecessary DEBUG log in ConnectionImplementation#isTableEnabled	Major	Client
HBASE-21511	Remove in progress snapshot check in SnapshotFileCache#getUnreferencedFiles	Minor	snapshots
HBASE-21480	Taking snapshot when RS crashes prevent we bring the regions online	Major	snapshots
HBASE-21485	Add more debug logs for remote procedure execution	Major	proc-v2
HBASE-21328	add HBASE_DISABLE_HADOOP_CLASSPATH_LOOKUP switch to hbase-env.sh	Minor	documentation, Operability
HBASE-19682	Use Collections.emptyList() For Empty List Values	Minor	.
HBASE-21388	No need to instantiate MemStoreLAB for master which not carry table	Major	.
HBASE-21325	Force to terminate regionserver when abort hang in somewhere	Major	.
HBASE-21385	HTable.delete request use rpc call directly instead of AsyncProcess	Major	.
HBASE-21318	Make RefreshHFilesClient runnable	Minor	HFile
HBASE-21263	Mention compression algorithm along with other storefile details	Minor	.
HBASE-21290	No need to instantiate BlockCache for master which not carry table	Major	.
HBASE-21256	Improve IntegrationTestBigLinkedList for testing huge data	Major	integration tests
HBASE-21251	Refactor RegionMover	Major	Operability
HBASE-21303	[shell] clear_deadservers with no args fails	Major	.
HBASE-21098	Improve Snapshot Performance with Temporary Snapshot Directory when rootDir on S3	Major	.
HBASE-21299	List counts of actual region states in master UI tables section	Major	UI
HBASE-21289	Remove the log "'hbase.regionserver.maxlogs' was deprecated." in AbstractFSWAL	Minor	.
HBASE-21185	WALPrettyPrinter: Additional useful info to be printed by wal printer tool, for debugability purposes	Minor	Operability
HBASE-21103	nightly test cache of yetus install needs to be more thorough in verification	Major	test
HBASE-21207	Add client side sorting functionality in master web UI for table and region server details.	Minor	master, monitoring, UI, Usability
HBASE-20857	JMX - add Balancer status = enabled / disabled	Major	API, master, metrics, REST, tooling, Usability
HBASE-21164	reportForDuty to spew less log if master is initializing	Minor	regionserver
HBASE-21204	NPE when scan raw DELETE_FAMILY_VERSION and codec is not set	Major	.
HBASE-20307	LoadTestTool prints too much zookeeper logging	Minor	tooling
HBASE-21155	Save on a few log strings and some churn in wal splitter by skipping out early if no logs in dir	Trivial	.
HBASE-21129	Clean up duplicate codes in #equals and #hashCode methods of Filter	Minor	Filters
HBASE-21157	Split TableInputFormatScan to individual tests	Minor	test
HBASE-21107	add a metrics for netty direct memory	Minor	IPC/RPC
HBASE-21153	Shaded client jars should always build in relevant phase to avoid confusion	Major	build
HBASE-21126	Add ability for HBase Canary to ignore a configurable number of ZooKeeper down nodes	Minor	canary, Zookeeper
HBASE-20749	Upgrade our use of checkstyle to 8.6+	Minor	build, community
HBASE-21071	HBaseTestingUtility::startMiniCluster() to use builder pattern	Major	test
HBASE-20387	flaky infrastructure should work for all branches	Critical	test
HBASE-20469	Directory used for sidelining old recovered edits files should be made configurable	Minor	.
HBASE-20979	Flaky test reporting should specify what JSON it needs and handle HTTP errors	Minor	test
HBASE-20985	add two attributes when we do normalization	Major	.
HBASE-20965	Separate region server report requests to new handlers	Major	Performance
HBASE-20845	Support set the consistency for Gets and Scans in thrift2	Major	Thrift
HBASE-20986	Separate the config of block size when we do log splitting and write Hlog	Major	.
HBASE-19036	Add action in Chaos Monkey to restart Active Namenode	Minor	.
HBASE-20856	PITA having to set WAL provider in two places	Minor	Operability, wal
HBASE-20935	HStore.removeCompactedFiles should log in case it is unable to delete a file	Minor	.
HBASE-20873	Update doc for Endpoint-based Export	Minor	documentation
HBASE-20672	New metrics ReadRequestRate and WriteRequestRate	Minor	metrics
HBASE-20617	Upgrade/remove jetty-jsp	Minor	.
HBASE-20396	Remove redundant MBean from thrift JMX	Major	Thrift
HBASE-20357	AccessControlClient API Enhancement	Major	security

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-22563	Reduce retained jobs for Jenkins pipelines	Major	.
HBASE-22552	Rewrite TestEndToEndSplitTransaction.testCanSplitJustAfterASplit	Major	test
HBASE-22551	TestMasterOperationsForRegionReplicas is flakey	Major	read replicas, test
HBASE-22481	Javadoc Warnings: reference not found	Trivial	documentation
HBASE-22546	TestRegionServerHostname#testRegionServerHostname fails reliably for me	Major	.
HBASE-22534	TestCellUtil fails when run on JDK11	Minor	java, test
HBASE-22536	TestForeignExceptionSerialization fails when run on JDK11	Minor	java
HBASE-22535	TestShellRSGroups fails when run on JDK11	Minor	java, shell
HBASE-22518	yetus personality is treating branch-1.4 like earlier branches for hadoopcheck	Major	test
HBASE-22513	Admin#getQuota does not work correctly if exceedThrottleQuota is set	Major	Quotas
HBASE-22522	The integration test in master branch's nightly job has error "ERROR: Only found 1050 rows."	Major	.
HBASE-22490	Nightly client integration test fails with hadoop-3	Major	build
HBASE-22502	Purge the logs when we reach the EOF for the last wal file when replication	Major	.
HBASE-22503	Failed to upgrade to 2.2+ as the global permission which storaged in zk is not right	Blocker	.
HBASE-22487	getMostLoadedRegions is unused	Trivial	regionserver
HBASE-22485	Fix failed ut TestClusterRestartFailover	Major	.
HBASE-22486	Fix flaky test TestLockManager	Major	.
HBASE-22471	Our nightly jobs for master and branch-2 are still using hadoop-2.7.1 in integration test	Major	build
HBASE-22003	Fix flaky test TestVerifyReplication.testHBase14905	Major	.
HBASE-22441	BucketCache NullPointerException in cacheBlock	Major	BucketCache
HBASE-22473	Split TestSCP	Major	Recovery, test
HBASE-22456	Polish TestSplitTransitionOnCluster	Major	test
HBASE-21800	RegionServer aborted due to NPE from MetaTableMetrics coprocessor	Critical	Coprocessors, meta, metrics, Operability
HBASE-22462	Should run a 'mvn install' at the end of hadoop check in pre commit job	Major	build
HBASE-22440	HRegionServer#getWalGroupsReplicationStatus() throws NPE	Major	regionserver, Replication
HBASE-22226	Incorrect level for headings in asciidoc	Trivial	documentation
HBASE-22442	Nightly build is failing with hadoop 3.x	Major	build, hadoop3
HBASE-20970	Update hadoop check versions for hadoop3 in hbase-personality	Major	build
HBASE-22424	Interactions in RSGroup test classes will cause TestRSGroupsAdmin2.testMoveServersAndTables and TestRSGroupsBalance.testGroupBalance flaky	Major	rsgroup
HBASE-22404	Open/Close region request may be executed twice when master restart	Major	.
HBASE-22274	Cell size limit check on append should consider cell's previous size.	Minor	.
HBASE-22072	High read/write intensive regions may cause long crash recovery	Major	Performance, Recovery
HBASE-22324	loss a mass of data when the sequenceId of cells greater than Integer.Max, because MemStoreMergerSegmentsIterator can not merge segments	Blocker	in-memory-compaction
HBASE-21777	"Tune compaction throughput" debug messages even when nothing has changed	Trivial	Compaction
HBASE-22360	Abort timer doesn't set when abort is called during graceful shutdown process	Major	regionserver
HBASE-20851	Change rubocop config for max line length of 100	Minor	community, shell
HBASE-21467	Fix flaky test TestCoprocessorClassLoader.testCleanupOldJars	Minor	.
HBASE-22312	Hadoop 3 profile for hbase-shaded-mapreduce should like mapreduce as a provided dependency	Major	mapreduce, shading
HBASE-22314	shaded byo-hadoop client should list needed hadoop modules as provided scope to avoid inclusion of unnecessary transitive depednencies	Major	hadoop2, hadoop3, shading
HBASE-22047	LeaseException in Scan should be retired	Major	Client, Scanners
HBASE-22343	Make procedure retry interval configurable in test	Major	amv2, test
HBASE-22190	SnapshotFileCache may fail to load the correct snapshot file list when there is an on-going snapshot operation	Blocker	snapshots
HBASE-22354	master never sets abortRequested, and thus abort timeout doesn't work for it	Major	.
HBASE-22350	Rewrite TestClientOperationTimeout so we do not timeout when creating table	Major	test
HBASE-22340	Corrupt KeyValue is silently ignored	Critical	wal
HBASE-22054	Space Quota: Compaction is not working for super user in case of NO_WRITES_COMPACTIONS	Minor	.
HBASE-22236	AsyncNonMetaRegionLocator should not cache HRegionLocation with null location	Major	asyncclient
HBASE-22086	space quota issue: deleting snapshot doesn't update the usage of table	Minor	.
HBASE-22298	branch-2.2 nightly fails "[ForOverride] Method annotated @ForOverride must have protected or package-private visibility"	Major	.
HBASE-22292	PreemptiveFastFailInterceptor clean repeatedFailuresMap issue	Blocker	.
HBASE-22230	REST Server drops connection on long scans	Major	.
HBASE-22200	WALSplitter.hasRecoveredEdits should use same FS instance from WAL region dir	Major	wal
HBASE-22286	License handling incorrectly lists CDDL/GPLv2+CE as safe to not aggregate	Critical	build, community
HBASE-22282	Should deal with error in the callback of RawAsyncHBaseAdmin.splitRegion methods	Major	Admin, asyncclient
HBASE-22278	RawAsyncHBaseAdmin should not use cached region location	Major	Admin, asyncclient
HBASE-22222	Site build fails after hbase-thirdparty upgrade	Blocker	website
HBASE-22249	Rest Server throws NoClassDefFoundError with Java 11 (run-time)	Major	.
HBASE-22235	OperationStatus.{SUCCESS|FAILURE|NOT_RUN} are not visible to 3rd party coprocessors	Major	Coprocessors
HBASE-22207	Fix flakey TestAssignmentManager.testAssignSocketTimeout	Major	test
HBASE-22202	Fix new findbugs issues after we upgrade hbase-thirdparty dependencies	Major	findbugs
HBASE-22144	MultiRowRangeFilter does not work with reversed scans	Critical	Filters, Scanners
HBASE-22198	Fix flakey TestAsyncTableGetMultiThreaded	Major	test
HBASE-22185	RAMQueueEntry#writeToCache should freeBlock if any exception encountered instead of the IOException catch block	Major	.
HBASE-22163	Should not archive the compacted store files when region warmup	Blocker	.
HBASE-22178	Introduce a createTableAsync with TableDescriptor method in Admin	Major	Admin
HBASE-22180	Make TestBlockEvictionFromClient.testBlockRefCountAfterSplits more stable	Major	test
HBASE-22179	Fix RawAsyncHBaseAdmin.getCompactionState	Major	Admin, asyncclient
HBASE-22177	Do not recreate IOException in RawAsyncHBaseAdmin.adminCall	Major	Admin, asyncclient
HBASE-22070	Checking restoreDir in RestoreSnapshotHelper	Minor	snapshots
HBASE-20912	Add import order config in dev support for eclipse	Major	.
HBASE-22133	Forward port HBASE-22073 "/rits.jsp throws an exception if no procedure" to branch-2.2+	Major	UI
HBASE-20911	correct Swtich/case indentation in formatter template for eclipse	Major	.
HBASE-21688	Address WAL filesystem issues	Major	Filesystem Integration, wal
HBASE-22121	AsyncAdmin can not deal with non default meta replica	Major	Admin, asyncclient, Client
HBASE-22115	HBase RPC aspires to grow an infinite tree of trace scopes; some other places are also unsafe	Critical	.
HBASE-22123	REST gateway reports Insufficient permissions exceptions as 404 Not Found	Minor	REST
HBASE-21135	Build fails on windows as it fails to parse windows path during license check	Major	build
HBASE-21781	list_deadservers elapsed time is incorrect	Major	shell
HBASE-22100	False positive for error prone warnings in pre commit job	Minor	build
HBASE-22098	Backport HBASE-18667 "Disable error-prone for hbase-protocol-shaded" to branch-2	Major	build
HBASE-20662	Increasing space quota on a violated table does not remove SpaceViolationPolicy.DISABLE enforcement	Major	.
HBASE-22057	Impose upper-bound on size of ZK ops sent in a single multi()	Major	.
HBASE-22074	Should use procedure store to persist the state in reportRegionStateTransition	Blocker	amv2, proc-v2
HBASE-21619	Fix warning message caused by incorrect ternary operator evaluation	Trivial	.
HBASE-22095	Taking a snapshot fails in local mode	Major	.
HBASE-22061	SplitTableRegionProcedure should hold the lock of its daughter regions	Major	.
HBASE-22045	Mutable range histogram reports incorrect outliers	Major	.
HBASE-21736	Remove the server from online servers before scheduling SCP for it in hbck	Major	hbck2, test
HBASE-22011	ThriftUtilities.getFromThrift should set filter when not set columns	Major	.
HBASE-21990	puppycrawl checkstyle dtds 404... moved to sourceforge	Major	build
HBASE-22010	docs on upgrade from 2.0,2.1 -> 2.2 renders incorrectly	Minor	documentation
HBASE-22006	Fix branch-2.1 findbugs warning; causes nightly show as failed.	Major	.
HBASE-21960	RESTServletContainer not configured for REST Jetty server	Blocker	REST
HBASE-21915	FileLink$FileLinkInputStream doesn't implement CanUnbuffer	Major	Filesystem Integration
HBASE-21565	Delete dead server from dead server list too early leads to concurrent Server Crash Procedures(SCP) for a same server	Critical	.
HBASE-21740	NPE happens while shutdown the RS	Major	.
HBASE-21866	Do not move the table to null rsgroup when creating an existing table	Major	proc-v2, rsgroup
HBASE-21983	Should track the scan metrics in AsyncScanSingleRegionRpcRetryingCaller if scan metrics is enabled	Major	asyncclient, Client
HBASE-21980	Fix typo in AbstractTestAsyncTableRegionReplicasRead	Major	test
HBASE-21487	Concurrent modify table ops can lead to unexpected results	Major	.
HBASE-20724	Sometimes some compacted storefiles are still opened after region failover	Critical	.
HBASE-21961	Infinite loop in AsyncNonMetaRegionLocator if there is only one region and we tried to locate before a non empty row	Critical	asyncclient, Client
HBASE-21943	The usage of RegionLocations.mergeRegionLocations is wrong for async client	Critical	asyncclient, Client
HBASE-21947	TestShell is broken after we remove the jackson dependencies	Major	dependencies, shell
HBASE-21942	[UI] requests per second is incorrect in rsgroup page(rsgroup.jsp)	Minor	.
HBASE-21922	BloomContext#sanityCheck may failed when use ROWPREFIX_DELIMITED bloom filter	Major	.
HBASE-21929	The checks at the end of TestRpcClientLeaks are not executed	Major	test
HBASE-21938	Add a new ClusterMetrics.Option SERVERS_NAME to only return the live region servers's name without metrics	Major	.
HBASE-21928	Deprecated HConstants.META_QOS	Major	Client, rpc
HBASE-21899	Fix missing variables in slf4j Logger	Trivial	logging
HBASE-21910	The nonce implementation is wrong for AsyncTable	Critical	asyncclient, Client
HBASE-21900	Infinite loop in AsyncMetaRegionLocator if we can not get the location for meta	Major	asyncclient, Client
HBASE-21890	Use execute instead of submit to submit a task in RemoteProcedureDispatcher	Critical	proc-v2
HBASE-21889	Use thrift 0.12.0 when build thrift by compile-thrift profile	Major	.
HBASE-21785	master reports open regions as RITs and also messes up rit age metric	Major	.
HBASE-21854	Race condition in TestProcedureSkipPersistence	Minor	proc-v2
HBASE-21862	IPCUtil.wrapException should keep the original exception types for all the connection exceptions	Blocker	.
HBASE-18484	VerifyRep by snapshot does not work when Yarn / SourceHBase / PeerHBase located in different HDFS clusters	Major	Replication
HBASE-21775	The BufferedMutator doesn't ever refresh region location cache	Major	Client
HBASE-21843	RegionGroupingProvider breaks the meta wal file name pattern which may cause data loss for meta region	Blocker	wal
HBASE-21795	Client application may get stuck (time bound) if a table modify op is called immediately after split op	Critical	amv2
HBASE-21840	TestHRegionWithInMemoryFlush fails with NPE	Blocker	test
HBASE-21811	region can be opened on two servers due to race condition with procedures and server reports	Blocker	amv2
HBASE-21644	Modify table procedure runs infinitely for a table having region replication > 1	Critical	Admin
HBASE-21733	SnapshotQuotaObserverChore should only fetch space quotas	Major	.
HBASE-21699	Create table failed when using SPLITS_FILE => 'splits.txt'	Blocker	Client, shell
HBASE-21535	Zombie Master detector is not working	Critical	master
HBASE-21770	Should deal with meta table in HRegionLocator.getAllRegionLocations	Major	Client
HBASE-21754	ReportRegionStateTransitionRequest should be executed in priority executor	Major	.
HBASE-21475	Put mutation (having TTL set) added via co-processor is retrieved even after TTL expires	Major	Coprocessors
HBASE-21749	RS UI may throw NPE and make rs-status page inaccessible with multiwal and replication	Major	Replication, UI
HBASE-21746	Fix two concern cases in RegionMover	Major	.
HBASE-21732	Should call toUpperCase before using Enum.valueOf in some methods for ColumnFamilyDescriptor	Critical	Client
HBASE-21704	The implementation of DistributedHBaseCluster.getServerHoldingRegion is incorrect	Major	.
HBASE-20917	MetaTableMetrics#stop references uninitialized requestsMap for non-meta region	Major	meta, metrics
HBASE-21639	maxHeapUsage value not read properly from config during EntryBuffers initialization	Minor	.
HBASE-21225	Having RPC & Space quota on a table/Namespace doesn't allow space quota to be removed using 'NONE'	Major	.
HBASE-21707	Fix warnings in hbase-rsgroup module and also make the UTs more stable	Major	Region Assignment, rsgroup
HBASE-20220	[RSGroup] Check if table exists in the cluster before moving it to the specified regionserver group	Major	rsgroup
HBASE-21691	Fix flaky test TestRecoveredEdits	Major	.
HBASE-21695	Fix flaky test TestRegionServerAbortTimeout	Major	.
HBASE-21614	RIT recovery with ServerCrashProcedure doesn't account for all regions	Critical	amv2
HBASE-21618	Scan with the same startRow(inclusive=true) and stopRow(inclusive=false) returns one result	Critical	Client
HBASE-21683	Reset readsEnabled flag after successfully flushing the primary region	Critical	read replicas
HBASE-21630	[shell] Define ENDKEY == STOPROW (we have ENDROW)	Trivial	shell
HBASE-21547	Precommit uses master flaky list for other branches	Major	test
HBASE-21660	Apply the cell to right memstore for increment/append operation	Major	.
HBASE-21646	Flakey TestTableSnapshotInputFormat; DisableTable not completing...	Major	test
HBASE-21545	NEW_VERSION_BEHAVIOR breaks Get/Scan with specified columns	Major	API
HBASE-21629	draining_servers.rb is broken	Major	scripts
HBASE-21621	Reversed scan does not return expected number of rows	Critical	Scanners
HBASE-21620	Problem in scan query when using more than one column prefix filter in some cases.	Major	Scanners
HBASE-21610	numOpenConnections metric is set to -1 when zero server channel exist	Minor	metrics
HBASE-21498	Master OOM when SplitTableRegionProcedure new CacheConfig and instantiate a new BlockCache	Major	.
HBASE-21592	quota.addGetResult(r) throw NPE	Major	.
HBASE-21589	TestCleanupMetaWAL fails	Blocker	test, wal
HBASE-21575	memstore above high watermark message is logged too much	Minor	logging, regionserver
HBASE-21582	If call HBaseAdmin#snapshotAsync but forget call isSnapshotFinished, then SnapshotHFileCleaner will skip to run every time	Major	.
HBASE-21568	Disable use of BlockCache for LoadIncrementalHFiles	Major	Client
HBASE-21453	Convert ReadOnlyZKClient to DEBUG instead of INFO	Major	logging, Zookeeper
HBASE-21559	The RestoreSnapshotFromClientTestBase related UT are flaky	Major	.
HBASE-21551	Memory leak when use scan with STREAM at server side	Blocker	regionserver
HBASE-21550	Add a new method preCreateTableRegionInfos for MasterObserver which allows CPs to modify the TableDescriptor	Major	Coprocessors
HBASE-21479	Individual tests in TestHRegionReplayEvents class are failing	Major	.
HBASE-21518	TestMasterFailoverWithProcedures is flaky	Major	.
HBASE-21504	If enable FIFOCompactionPolicy, a compaction may write a "empty" hfile whose maxTimeStamp is long max. This kind of hfile will never be archived.	Critical	Compaction
HBASE-21300	Fix the wrong reference file path when restoring snapshots for tables with MOB columns	Major	.
HBASE-21507	Compaction failed when execute AbstractMultiFileWriter.beforeShipped() method	Major	Compaction, regionserver
HBASE-21387	Race condition surrounding in progress snapshot handling in snapshot cache leads to loss of snapshot files	Major	snapshots
HBASE-21503	Replication normal source can get stuck due potential race conditions between source wal reader and wal provider initialization threads.	Blocker	Replication
HBASE-21466	WALProcedureStore uses wrong FileSystem if wal.dir is not under rootdir	Major	.
HBASE-21445	CopyTable by bulkload will write hfile into yarn's HDFS	Major	mapreduce
HBASE-21437	Bypassed procedure throw IllegalArgumentException when its state is WAITING_TIMEOUT	Major	.
HBASE-21439	StochasticLoadBalancer RegionLoads aren’t being used in RegionLoad cost functions	Major	Balancer
HBASE-20604	ProtobufLogReader#readNext can incorrectly loop to the same position in the stream until the the WAL is rolled	Critical	Replication, wal
HBASE-21247	Custom Meta WAL Provider doesn't default to custom WAL Provider whose configuration value is outside the enums in Providers	Major	wal
HBASE-21430	[hbase-connectors] Move hbase-spark* modules to hbase-connectors repo	Major	hbase-connectors, spark
HBASE-21438	TestAdmin2#testGetProcedures fails due to FailedProcedure inaccessible	Major	.
HBASE-21425	2.1.1 fails to start over 1.x data; namespace not assigned	Critical	amv2
HBASE-21407	Resolve NPE in backup Master UI	Minor	UI
HBASE-21422	NPE in TestMergeTableRegionsProcedure.testMergeWithoutPONR	Major	proc-v2, test
HBASE-21424	Change flakies and nightlies so scheduled less often	Major	build
HBASE-21417	Pre commit build is broken due to surefire plugin crashes	Critical	build
HBASE-21371	Hbase unable to compile against Hadoop trunk (3.3.0-SNAPSHOT) due to license error	Major	.
HBASE-21391	RefreshPeerProcedure should also wait master initialized before executing	Major	Replication
HBASE-21342	FileSystem in use may get closed by other bulk load call in secure bulkLoad	Major	.
HBASE-21349	Cluster is going down but CatalogJanitor and Normalizer try to run and fail noisely	Minor	.
HBASE-21356	bulkLoadHFile API should ensure that rs has the source hfile's write permission	Major	.
HBASE-21355	HStore's storeSize is calculated repeatedly which causing the confusing region split	Blocker	regionserver
HBASE-21334	TestMergeTableRegionsProcedure is flakey	Major	amv2, proc-v2, test
HBASE-21178	[BC break] : Get and Scan operation with a custom converter_class not working	Critical	shell
HBASE-21200	Memstore flush doesn't finish because of seekToPreviousRow() in memstore scanner.	Critical	Scanners
HBASE-21292	IdLock.getLockEntry() may hang if interrupted	Major	.
HBASE-21335	Change the default wait time of HBCK2 tool	Critical	.
HBASE-21291	Add a test for bypassing stuck state-machine procedures	Major	.
HBASE-21055	NullPointerException when balanceOverall() but server balance info is null	Major	Balancer
HBASE-21327	Fix minor logging issue where we don't report servername if no associated SCP	Trivial	amv2
HBASE-21320	[canary] Cleanup of usage and add commentary	Major	canary
HBASE-21266	Not running balancer because processing dead regionservers, but empty dead rs list	Major	.
HBASE-21260	The whole balancer plans might be aborted if there are more than one plans to move a same region	Major	Balancer, master
HBASE-21280	Add anchors for each heading in UI	Trivial	UI, Usability
HBASE-20764	build broken when latest commit is gpg signed	Critical	build
HBASE-18549	Unclaimed replication queues can go undetected	Critical	Replication
HBASE-21248	Implement exponential backoff when retrying for ModifyPeerProcedure	Major	proc-v2, Replication
HBASE-21196	HTableMultiplexer clears the meta cache after every put operation	Critical	Performance
HBASE-19418	RANGE_OF_DELAY in PeriodicMemstoreFlusher should be configurable.	Minor	.
HBASE-18451	PeriodicMemstoreFlusher should inspect the queue before adding a delayed flush request	Major	regionserver
HBASE-21228	Memory leak since AbstractFSWAL caches Thread object and never clean later	Critical	wal
HBASE-20766	Verify Replication Tool Has Typo "remove cluster"	Trivial	.
HBASE-21232	Show table state in Tables view on Master home page	Major	Operability, UI
HBASE-21212	Wrong flush time when update flush metric	Minor	.
HBASE-21208	Bytes#toShort doesn't work without unsafe	Critical	.
HBASE-20704	Sometimes some compacted storefiles are not archived on region close	Critical	Compaction
HBASE-21203	TestZKMainServer#testCommandLineWorks won't pass with default 4lw whitelist	Minor	test, Zookeeper
HBASE-21102	ServerCrashProcedure should select target server where no other replicas exist for the current region	Major	Region Assignment
HBASE-21206	Scan with batch size may return incomplete cells	Critical	Scanners
HBASE-21182	Failed to execute start-hbase.sh	Major	.
HBASE-21179	Fix the number of actions in responseTooSlow log	Major	logging, rpc
HBASE-21174	[REST] Failed to parse empty qualifier in TableResource#getScanResource	Major	REST
HBASE-21181	Use the same filesystem for wal archive directory and wal directory	Major	.
HBASE-21021	Result returned by Append operation should be ordered	Major	.
HBASE-21173	Remove the duplicate HRegion#close in TestHRegion	Minor	test
HBASE-21144	AssignmentManager.waitForAssignment is not stable	Major	amv2, test
HBASE-21143	Update findbugs-maven-plugin to 3.0.4	Major	pom
HBASE-21171	[amv2] Tool to parse a directory of MasterProcWALs standalone	Major	amv2, test
HBASE-21052	After restoring a snapshot, table.jsp page for the table gets stuck	Major	snapshots
HBASE-21001	ReplicationObserver fails to load in HBase 2.0.0	Major	.
HBASE-20741	Split of a region with replicas creates all daughter regions and its replica in same server	Major	read replicas
HBASE-21127	TableRecordReader need to handle cursor result too	Major	.
HBASE-20892	[UI] Start / End keys are empty on table.jsp	Major	.
HBASE-21136	NPE in MetricsTableSourceImpl.updateFlushTime	Major	metrics
HBASE-21132	return wrong result in rest multiget	Major	.
HBASE-21128	TestAsyncRegionAdminApi.testAssignRegionAndUnassignRegion is broken	Major	test
HBASE-20940	HStore.cansplit should not allow split to happen if it has references	Major	.
HBASE-21084	When cloning a snapshot including a split parent region, the split parent region of the cloned table will be online	Major	snapshots
HBASE-20968	list_procedures_test fails due to no matching regex	Major	shell, test
HBASE-21030	Correct javadoc for append operation	Minor	documentation
HBASE-21088	HStoreFile should be closed in HStore#hasReferences	Major	.
HBASE-20890	PE filterScan seems to be stuck forever	Minor	.
HBASE-20772	Controlled shutdown fills Master log with the disturbing message "No matching procedure found for rit=OPEN, location=ZZZZ, table=YYYYY, region=XXXX transition to CLOSED	Major	logging
HBASE-20978	[amv2] Worker terminating UNNATURALLY during MoveRegionProcedure	Critical	amv2
HBASE-21078	[amv2] CODE-BUG NPE in RTP doing Unassign	Major	amv2
HBASE-21113	Apply the branch-2 version of HBASE-21095, The timeout retry logic for several procedures are broken after master restarts	Major	amv2
HBASE-21101	Remove the waitUntilAllRegionsAssigned call after split in TestTruncateTableProcedure	Major	test
HBASE-19008	Add missing equals or hashCode method(s) to stock Filter implementations	Major	.
HBASE-20614	REST scan API with incorrect filter text file throws HTTP 503 Service Unavailable error	Minor	REST
HBASE-21041	Memstore's heap size will be decreased to minus zero after flush	Major	.
HBASE-21031	Memory leak if replay edits failed during region opening	Major	.
HBASE-20666	Unsuccessful table creation leaves entry in hbase:rsgroup table	Minor	.
HBASE-21032	ScanResponses contain only one cell each	Major	Performance, Scanners
HBASE-20705	Having RPC Quota on a table prevents Space quota to be recreated/removed	Major	.
HBASE-21058	Nightly tests for branches 1 fail to build ref guide	Major	documentation
HBASE-21074	JDK7 branches need to pass "-Dhttps.protocols=TLSv1.2" to maven when building	Major	build, community, test
HBASE-21062	WALFactory has misleading notion of "default"	Major	wal
HBASE-21047	Object creation of StoreFileScanner thru constructor and close may leave refCount to -1	Major	.
HBASE-21005	Maven site configuration causes downstream projects to get a directory named ${project.basedir}	Minor	build
HBASE-21007	Memory leak in HBase rest server	Critical	REST
HBASE-20794	CreateTable operation does not log its landing at the master nor the initiator at INFO level	Major	logging
HBASE-20538	Upgrade our hadoop versions to 2.7.7 and 3.0.3	Critical	java, security
HBASE-20927	RSGroupAdminEndpoint doesn't handle clearing dead servers if they are not processed yet.	Major	.
HBASE-20932	Effective MemStoreSize::hashCode()	Major	.
HBASE-20928	Rewrite calculation of midpoint in binarySearch functions to prevent overflow	Minor	io
HBASE-20565	ColumnRangeFilter combined with ColumnPaginationFilter can produce incorrect result since 1.4	Major	Filters
HBASE-20908	Infinite loop on regionserver if region replica are reduced	Major	read replicas
HBASE-19893	restore_snapshot is broken in master branch when region splits	Critical	snapshots
HBASE-20870	Wrong HBase root dir in ITBLL's Search Tool	Minor	integration tests
HBASE-20901	Reducing region replica has no effect	Major	.
HBASE-6028	Implement a cancel for in-progress compactions	Minor	regionserver
HBASE-20869	Endpoint-based Export use incorrect user to write to destination	Major	Coprocessors
HBASE-20879	Compacting memstore config should handle lower case	Major	.
HBASE-20865	CreateTableProcedure is stuck in retry loop in CREATE_TABLE_WRITE_FS_LAYOUT state	Major	amv2
HBASE-19572	RegionMover should use the configured default port number and not the one from HConstants	Major	.
HBASE-20697	Can't cache All region locations of the specify table by calling table.getRegionLocator().getAllRegionLocations()	Major	meta
HBASE-20791	RSGroupBasedLoadBalancer#setClusterMetrics should pass ClusterMetrics to its internalBalancer	Major	Balancer, rsgroup
HBASE-20770	WAL cleaner logs way too much; gets clogged when lots of work to do	Critical	logging

TESTS:

JIRA	Summary	Priority	Component
HBASE-21963	Add a script for building and verifying release candidate	Minor	community, scripts
HBASE-21756	Backport HBASE-21279 (Split TestAdminShell into several tests) to branch-2	Major	.
HBASE-20136	TestKeyValue misses ClassRule and Category annotations	Minor	.
HBASE-21261	Add log4j.properties for hbase-rsgroup tests	Trivial	.
HBASE-21258	Add resetting of flags for RS Group pre/post hooks in TestRSGroups	Major	.
HBASE-21097	Flush pressure assertion may fail in testFlushThroughputTuning	Major	regionserver
HBASE-21138	Close HRegion instance at the end of every test in TestHRegion	Major	.
HBASE-21161	Enable the test added in HBASE-20741 that was removed accidentally	Minor	.
HBASE-21076	TestTableResource fails with NPE	Major	REST, test
HBASE-20907	Fix Intermittent failure on TestProcedurePriority	Major	.
HBASE-20838	Include hbase-server in precommit test if CommonFSUtils is changed	Major	.

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-21970	Document that how to upgrade from 2.0 or 2.1 to 2.2+	Major	.
HBASE-22357	Fix remaining Checkstyle issues in hbase-replication	Trivial	Replication
HBASE-22554	Upgrade to surefire 2.22.2	Major	test
HBASE-22500	Modify pom and jenkins jobs for hadoop versions	Blocker	build, hadoop2, hadoop3
HBASE-22316	Record the stack trace for current thread in FutureUtils.get	Major	asyncclient, Client
HBASE-22326	Fix Checkstyle errors in hbase-examples	Minor	.
HBASE-22327	Fix remaining Checkstyle issues in hbase-hadoop-compat	Trivial	.
HBASE-22478	Add jackson dependency for hbase-http module	Major	build, dependencies
HBASE-22445	Add file info when throw exceptions in HFileReaderImpl	Major	.
HBASE-22447	Check refCount before free block in BucketCache	Major	BucketCache
HBASE-22400	Remove the adapter code in async fs implementation for hadoop-2.7.x	Major	wal
HBASE-22430	hbase-vote should tee build and test output to console	Trivial	.
HBASE-22429	hbase-vote download step requires URL to end with '/'	Trivial	.
HBASE-22405	Update Ref Guide for EOL of Hadoop 2.7	Major	community, documentation
HBASE-22325	AsyncRpcRetryingCaller will not schedule retry if we hit a NotServingRegionException but there is no TableName provided	Major	asyncclient, Client
HBASE-22322	Use special pause for CallQueueTooBigException	Major	asyncclient, Client
HBASE-22317	Support reading from meta replicas	Major	asyncclient, read replicas
HBASE-22261	Make use of ClusterStatusListener for async client	Major	asyncclient
HBASE-22267	Implement client push back for async client	Major	asyncclient
HBASE-19763	Fix Checkstyle errors in hbase-procedure	Minor	.
HBASE-22244	Make use of MetricsConnection in async client	Major	asyncclient, metrics
HBASE-22196	Split TestRestartCluster	Major	test
HBASE-22117	Move hasPermission/checkPermissions from region server to master	Major	.
HBASE-21886	Run ITBLL for branch-2.2	Major	.
HBASE-22155	Move 2.2.0 on to hbase-thirdparty-2.2.0	Major	thirdparty
HBASE-22153	Fix the flaky TestRestartCluster	Major	test
HBASE-22152	Create a jenkins file for yetus to processing GitHub PR	Major	build
HBASE-22158	RawAsyncHBaseAdmin.getTableSplits should filter out none default replicas	Major	Admin
HBASE-22157	Include the cause when constructing RestoreSnapshotException in restoreSnapshot	Major	Admin
HBASE-22141	Fix TestAsyncDecommissionAdminApi	Major	test
HBASE-22135	AsyncAdmin will not refresh master address	Major	Admin, asyncclient, Client
HBASE-22101	AsyncAdmin.isTableAvailable should not throw TableNotFoundException	Major	Admin, asyncclient, Client
HBASE-22094	Throw TableNotFoundException if table not exists in AsyncAdmin.compact	Major	Admin
HBASE-21911	Move getUserPermissions from regionserver to master	Major	.
HBASE-22015	UserPermission should be annotated as InterfaceAudience.Public	Blocker	.
HBASE-22066	Add markers to CHANGES.md and RELEASENOTES.md	Major	.
HBASE-22040	Add mergeRegionsAsync with a List of region names method in AsyncAdmin	Major	Admin, asyncclient, Client
HBASE-22039	Should add the synchronous parameter for the XXXSwitch method in AsyncAdmin	Major	Admin, asyncclient, Client
HBASE-22022	nightly fails rat check down in the dev-support/hbase_nightly_source-artifact.sh check	Major	.
HBASE-22025	RAT check fails in nightlies; fails on (old) test data files.	Major	.
HBASE-21977	Skip replay WAL and update seqid when open regions restored from snapshot	Major	Region Assignment, snapshots
HBASE-21999	[DEBUG] Exit if git returns empty revision!	Major	build
HBASE-22000	Deprecated isTableAvailable with splitKeys	Major	asyncclient, Client
HBASE-21949	Fix flaky test TestHBaseTestingUtility.testMiniZooKeeperWithMultipleClientPorts	Major	.
HBASE-21993	Set version as 2.2.0 in branch-2.2 in prep for first RC	Major	.
HBASE-21997	Fix hbase-rest findbugs ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD complaint	Major	REST
HBASE-21986	Generate CHANGES.md and RELEASENOTES.md for 2.2.0	Major	.
HBASE-21972	Copy master doc into branch-2.2 and edit to make it suit 2.2.0	Major	.
HBASE-15728	Add remaining per-table region / store / flush / compaction related metrics	Major	metrics
HBASE-21934	RemoteProcedureDispatcher should track the ongoing dispatched calls	Blocker	proc-v2
HBASE-21588	Procedure v2 wal splitting implementation	Major	.
HBASE-21729	Extract ProcedureCoordinatorRpcs and ProcedureMemberRpcs from CoordinatedStateManager	Major	.
HBASE-21094	Remove the explicit timeout config for TestTruncateTableProcedure	Major	test
HBASE-21093	Move TestCreateTableProcedure.testMRegions to a separated file	Major	test
HBASE-18201	add UT and docs for DataBlockEncodingTool	Minor	tooling
HBASE-21978	Should close AsyncRegistry if we fail to get cluster id when creating AsyncConnection	Major	asyncclient, Client
HBASE-21974	Change Admin#grant/revoke parameter from UserPermission to user and Permission	Major	.
HBASE-21976	Deal with RetryImmediatelyException for batching request	Major	asyncclient, Client
HBASE-21820	Implement CLUSTER quota scope	Major	.
HBASE-21962	Filters do not work in ThriftTable	Major	Thrift
HBASE-21927	Always fail the locate request when error occur	Major	asyncclient, Client
HBASE-21944	Validate put for batch operation	Major	asyncclient, Client
HBASE-21945	Maintain the original order when sending batch request	Major	asyncclient, Client
HBASE-21783	Support exceed user/table/ns throttle quota if region server has available quota	Major	.
HBASE-21930	Deal with ScannerResetException when opening region scanner	Major	asyncclient, Client
HBASE-21907	Should set priority for rpc request	Major	asyncclient, Client
HBASE-21909	Validate the put instance before executing in AsyncTable.put method	Major	asyncclient, Client
HBASE-21814	Remove the TODO in AccessControlLists#addUserPermission	Major	.
HBASE-19889	Revert Workaround: Purge User API building from branch-2 so can make a beta-1	Major	website
HBASE-21838	Create a special ReplicationEndpoint just for verifying the WAL entries are fine	Major	Replication, wal
HBASE-21829	Use FutureUtils.addListener instead of calling whenComplete directly	Major	asyncclient, Client
HBASE-21828	Make sure we do not return CompletionException when locating region	Major	asyncclient, Client
HBASE-21764	Size of in-memory compaction thread pool should be configurable	Major	Compaction, in-memory-compaction
HBASE-21809	Add retry thrift client for ThriftTable/Admin	Major	.
HBASE-21739	Move grant/revoke from regionserver to master	Major	.
HBASE-21798	Cut branch-2.2	Major	.
HBASE-20542	Better heap utilization for IMC with MSLABs	Major	in-memory-compaction
HBASE-21713	Support set region server throttle quota	Major	.
HBASE-21761	Align the methods in RegionLocator and AsyncTableRegionLocator	Major	asyncclient, Client
HBASE-17370	Fix or provide shell scripts to drain and decommission region server	Major	.
HBASE-21750	Most of KeyValueUtil#length can be replaced by cell#getSerializedSize for better performance because the latter one has been optimized	Major	.
HBASE-21734	Some optimization in FilterListWithOR	Major	.
HBASE-21738	Remove all the CSLM#size operation in our memstore because it's an quite time consuming.	Critical	Performance
HBASE-21034	Add new throttle type: read/write capacity unit	Major	.
HBASE-21726	Add getAllRegionLocations method to AsyncTableRegionLocator	Major	asyncclient, Client
HBASE-19695	Handle disabled table for async client	Major	asyncclient, Client
HBASE-21711	Remove references to git.apache.org/hbase.git	Critical	.
HBASE-21647	Add status track for splitting WAL tasks	Major	Operability
HBASE-21705	Should treat meta table specially for some methods in AsyncAdmin	Major	Admin, asyncclient, Client
HBASE-21663	Add replica scan support	Major	asyncclient, Client, read replicas
HBASE-21580	Support getting Hbck instance from AsyncConnection	Major	asyncclient, Client, hbck2
HBASE-21652	Refactor ThriftServer making thrift2 server inherited from thrift1 server	Major	.
HBASE-21661	Provide Thrift2 implementation of Table/Admin	Major	.
HBASE-21682	Support getting from specific replica	Major	read replicas
HBASE-21159	Add shell command to switch throttle on or off	Major	.
HBASE-21362	Disable printing of stack-trace in shell when quotas are violated	Minor	shell
HBASE-21361	Disable printing of stack-trace in shell when quotas are not enabled	Minor	shell
HBASE-17356	Add replica get support	Major	Client
HBASE-21650	Add DDL operation and some other miscellaneous to thrift2	Major	Thrift
HBASE-21401	Sanity check when constructing the KeyValue	Critical	regionserver
HBASE-21578	Fix wrong throttling exception for capacity unit	Major	.
HBASE-21570	Add write buffer periodic flush support for AsyncBufferedMutator	Major	asyncclient, Client
HBASE-21465	Retry on reportRegionStateTransition can lead to unexpected errors	Major	amv2
HBASE-21508	Ignore the reportRegionStateTransition call from a dead server	Major	amv2
HBASE-21490	WALProcedure may remove proc wal files still with active procedures	Major	proc-v2
HBASE-21377	Add debug log for procedure stack id related operations	Major	proc-v2
HBASE-21472	Should not persist the dispatched field for RegionRemoteProcedureBase	Major	amv2
HBASE-21473	RowIndexSeekerV1 may return cell with extra two \x00\x00 bytes which has no tags	Major	.
HBASE-21463	The checkOnlineRegionsReport can accidentally complete a TRSP	Critical	amv2
HBASE-21376	Add some verbose log to MasterProcedureScheduler	Major	logging, proc-v2
HBASE-21443	[hbase-connectors] Purge hbase-* modules from core now they've been moved to hbase-connectors	Major	hbase-connectors, spark
HBASE-21421	Do not kill RS if reportOnlineRegions fails	Major	.
HBASE-21314	The implementation of BitSetNode is not efficient	Major	proc-v2
HBASE-21351	The force update thread may have race with PE worker when the procedure is rolling back	Critical	proc-v2
HBASE-21191	Add a holding-pattern if no assign for meta or namespace (Can happen if masterprocwals have been cleared).	Major	amv2
HBASE-21322	Add a scheduleServerCrashProcedure() API to HbckService	Critical	hbck2
HBASE-21375	Revisit the lock and queue implementation in MasterProcedureScheduler	Major	proc-v2
HBASE-20973	ArrayIndexOutOfBoundsException when rolling back procedure	Critical	amv2
HBASE-21384	Procedure with holdlock=false should not be restored lock when restarts	Blocker	.
HBASE-21364	Procedure holds the lock should put to front of the queue after restart	Blocker	.
HBASE-21215	Figure how to invoke hbck2; make it easy to find	Major	amv2, hbck2
HBASE-21372	Set hbase.assignment.maximum.attempts to Long.MAX	Major	amv2
HBASE-21363	Rewrite the buildingHoldCleanupTracker method in WALProcedureStore	Major	proc-v2
HBASE-21338	[balancer] If balancer is an ill-fit for cluster size, it gives little indication	Major	Balancer, Operability
HBASE-21192	Add HOW-TO repair damaged AMv2.	Major	amv2
HBASE-21073	"Maintenance mode" master	Major	amv2, hbck2, master
HBASE-21354	Procedure may be deleted improperly during master restarts resulting in 'Corrupt'	Major	.
HBASE-21336	Simplify the implementation of WALProcedureMap	Major	proc-v2
HBASE-21323	Should not skip force updating for a sub procedure even if it has been finished	Major	proc-v2
HBASE-21269	Forward-port to branch-2 " HBASE-21213 [hbck2] bypass leaves behind state in RegionStates when assign/unassign"	Major	amv2
HBASE-20716	Unsafe access cleanup	Critical	Performance
HBASE-21330	ReopenTableRegionsProcedure will enter an infinite loop if we schedule a TRSP at the same time	Major	amv2
HBASE-21310	Split TestCloneSnapshotFromClient	Major	test
HBASE-21311	Split TestRestoreSnapshotFromClient	Major	test
HBASE-21315	The getActiveMinProcId and getActiveMaxProcId of BitSetNode are incorrect if there are no active procedure	Major	.
HBASE-21278	Do not rollback successful sub procedures when rolling back a procedure	Critical	proc-v2
HBASE-21309	Increase the waiting timeout for TestProcedurePriority	Major	test
HBASE-21254	Need to find a way to limit the number of proc wal files	Critical	proc-v2
HBASE-21250	Refactor WALProcedureStore and add more comments for better understanding the implementation	Major	proc-v2
HBASE-19275	TestSnapshotFileCache never worked properly	Major	.
HBASE-21249	Add jitter for ProcedureUtil.getBackoffTimeMs	Major	proc-v2
HBASE-21244	Skip persistence when retrying for assignment related procedures	Major	amv2, Performance, proc-v2
HBASE-21233	Allow the procedure implementation to skip persistence of the state after a execution	Major	Performance, proc-v2
HBASE-21227	Implement exponential retrying backoff for Assign/UnassignRegionHandler introduced in HBASE-21217	Major	amv2, regionserver
HBASE-21217	Revisit the executeProcedure method for open/close region	Critical	amv2, proc-v2
HBASE-21214	[hbck2] setTableState just sets hbase:meta state, not in-memory state	Major	amv2, hbck2
HBASE-21023	Add bypassProcedureToCompletion() API to HbckService	Major	hbck2
HBASE-21156	[hbck2] Queue an assign of hbase:meta and bulk assign/unassign	Critical	hbck2
HBASE-21169	Initiate hbck2 tool in hbase-operator-tools repo	Major	hbck2
HBASE-21172	Reimplement the retry backoff logic for ReopenTableRegionsProcedure	Major	amv2, proc-v2
HBASE-21189	flaky job should gather machine stats	Minor	test
HBASE-21190	Log files and count of entries in each as we load from the MasterProcWAL store	Major	amv2
HBASE-21083	Introduce a mechanism to bypass the execution of a stuck procedure	Major	amv2
HBASE-21017	Revisit the expected states for open/close	Major	amv2
HBASE-20941	Create and implement HbckService in master	Major	.
HBASE-21072	Block out HBCK1 in hbase2	Major	hbck
HBASE-21095	The timeout retry logic for several procedures are broken after master restarts	Critical	amv2, proc-v2
HBASE-20975	Lock may not be taken or released while rolling back procedure	Major	amv2
HBASE-21025	Add cache for TableStateManager	Major	.
HBASE-21012	Revert the change of serializing TimeRangeTracker	Critical	.
HBASE-20813	Remove RPC quotas when the associated table/Namespace is dropped off	Minor	.
HBASE-20885	Remove entry for RPC quota from hbase:quota when RPC quota is removed.	Minor	.
HBASE-20893	Data loss if splitting region while ServerCrashProcedure executing	Major	.
HBASE-20950	Helper method to configure secure DFS cluster for tests	Major	test
HBASE-19369	HBase Should use Builder Pattern to Create Log Files while using WAL on Erasure Coding	Major	.
HBASE-20939	There will be race when we call suspendIfNotReady and then throw ProcedureSuspendedException	Critical	amv2
HBASE-20921	Possible NPE in ReopenTableRegionsProcedure	Major	amv2
HBASE-20867	RS may get killed while master restarts	Major	.
HBASE-20878	Data loss if merging regions while ServerCrashProcedure executing	Critical	amv2
HBASE-20846	Restore procedure locks when master restarts	Major	.
HBASE-20914	Trim Master memory usage	Major	Balancer, master
HBASE-20853	Polish "Add defaults to Table Interface so Implementors don't have to"	Major	API
HBASE-20875	MemStoreLABImp::copyIntoCell uses 7% CPU when writing	Major	Performance
HBASE-20860	Merged region's RIT state may not be cleaned after master restart	Major	.
HBASE-20847	The parent procedure of RegionTransitionProcedure may not have the table lock	Major	proc-v2, Region Assignment
HBASE-20776	Update branch-2 version to 2.2.0-SNAPSHOT	Major	build

OTHER:

JIRA	Summary	Priority	Component
HBASE-21612	Add developer debug options in HBase Config for REST server	Minor	Operability, REST, scripts
HBASE-18735	Provide a fast mechanism for shutting down mini cluster	Major	.
HBASE-21489	TestShell is broken	Major	shell
HBASE-20152	[AMv2] DisableTableProcedure versus ServerCrashProcedure	Major	amv2
HBASE-20540	[umbrella] Hadoop 3 compatibility	Major	.
HBASE-21536	Fix completebulkload usage instructions	Trivial	documentation, mapreduce
HBASE-22449	https everywhere in Maven metadata	Minor	.
HBASE-22406	skip generating rdoc when building gems in our docker image for running yetus	Critical	build, test
HBASE-22375	Promote AccessChecker to LimitedPrivate(Coprocessor)	Minor	Coprocessors, security
HBASE-21714	Deprecated isTableAvailableWithSplit method in thrift module	Major	Thrift
HBASE-22359	Backport of HBASE-21371 misses activation-api license information	Minor	build, community
HBASE-22174	Remove error prone from our precommit javac check	Major	build
HBASE-22231	Remove unused and * imports	Minor	.
HBASE-22304	Fix remaining Checkstyle issues in hbase-endpoint	Trivial	.
HBASE-22020	upgrade to yetus 0.9.0	Major	build, community
HBASE-22187	Remove usage of deprecated ClusterConnection.clearRegionCache	Trivial	Client
HBASE-22203	Reformat DemoClient.java	Trivial	.
HBASE-22189	Remove usage of StoreFile.getModificationTimeStamp	Trivial	.
HBASE-22108	Avoid passing null in Admin methods	Major	Admin
HBASE-22007	Add restoreSnapshot and cloneSnapshot with acl methods in AsyncAdmin	Major	Admin, asyncclient, Client
HBASE-22131	Delete the patches in hbase-protocol-shaded module	Major	build, Protobufs
HBASE-22099	Backport HBASE-21895 "Error prone upgrade" to branch-2	Major	build
HBASE-22052	pom cleaning; filter out jersey-core in hadoop2 to match hadoop3 and remove redunant version specifications	Major	.
HBASE-22065	Add listTableDescriptors(List<TableName>) method in AsyncAdmin	Major	Admin
HBASE-22042	Missing @Override annotation for RawAsyncTableImpl.scan	Major	asyncclient, Client
HBASE-21057	upgrade to latest spotbugs	Minor	community, test
HBASE-21888	Add a isClosed method to AsyncConnection	Major	asyncclient, Client
HBASE-21884	Fix box/unbox findbugs warning in secure bulk load	Minor	.
HBASE-21859	Add clearRegionLocationCache method for AsyncConnection	Major	asyncclient, Client
HBASE-21853	update copyright notices to 2019	Major	documentation
HBASE-21791	Upgrade thrift dependency to 0.12.0	Blocker	Thrift
HBASE-21710	Add quota related methods to the Admin interface	Major	.
HBASE-21782	LoadIncrementalHFiles should not be IA.Public	Major	mapreduce
HBASE-21762	Move some methods in ClusterConnection to Connection	Major	Client
HBASE-21715	Do not throw UnsupportedOperationException in ProcedureFuture.get	Major	Client
HBASE-21716	Add toStringCustomizedValues to TableDescriptor	Major	.
HBASE-21731	Do not need to use ClusterConnection in IntegrationTestBigLinkedListWithVisibility	Major	.
HBASE-21685	Change repository urls to Gitbox	Critical	.
HBASE-21534	TestAssignmentManager is flakey	Major	test
HBASE-21541	Move MetaTableLocator.verifyRegionLocation to hbase-rsgroup module	Major	.
HBASE-21265	Split up TestRSGroups	Minor	rsgroup, test
HBASE-21517	Move the getTableRegionForRow method from HMaster to TestMaster	Major	test
HBASE-21281	Update bouncycastle dependency.	Major	dependencies, test
HBASE-21198	Exclude dependency on net.minidev:json-smart	Major	.
HBASE-21282	Upgrade to latest jetty 9.2 and 9.3 versions	Major	dependencies
HBASE-21287	JVMClusterUtil Master initialization wait time not configurable	Major	test
HBASE-21168	BloomFilterUtil uses hardcoded randomness	Trivial	.
HBASE-20482	Print a link to the ref guide chapter for the shell during startup	Minor	documentation, shell
HBASE-20942	Improve RpcServer TRACE logging	Major	Operability
HBASE-20989	Minor, miscellaneous logging fixes	Trivial	logging

Release 2.1.0 - Unreleased (as of 2018-07-10)

INCOMPATIBLE CHANGES:

JIRA	Summary	Priority	Component
HBASE-20691	Storage policy should allow deferring to HDFS	Blocker	Filesystem Integration, wal
HBASE-20270	Turn off command help that follows all errors in shell	Major	shell
HBASE-20501	Change the Hadoop minimum version to 2.7.1	Blocker	community, documentation
HBASE-20406	HBase Thrift HTTP - Shouldn't handle TRACE/OPTIONS methods	Major	security, Thrift
HBASE-20159	Support using separate ZK quorums for client	Major	Client, Operability, Zookeeper
HBASE-20148	Make serial replication as a option for a peer instead of a table	Major	Replication

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-20833	Modify pre-upgrade coprocessor validator to support table level coprocessors	Major	Coprocessors
HBASE-15809	Basic Replication WebUI	Critical	Replication, UI
HBASE-19735	Create a minimal "client" tarball installation	Major	build, Client
HBASE-20656	Validate pre-2.0 coprocessors against HBase 2.0+	Major	tooling
HBASE-20592	Create a tool to verify tables do not have prefix tree encoding	Minor	Operability, tooling
HBASE-20046	Reconsider the implementation for serial replication	Major	Replication
HBASE-19397	Design procedures for ReplicationManager to notify peer change event from master	Major	proc-v2, Replication

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-20806	Split style journal for flushes and compactions	Minor	.
HBASE-20474	Show non-RPC tasks on master/regionserver Web UI by default	Major	UI
HBASE-20826	Truncate responseInfo attributes on RpcServer WARN messages	Major	rpc
HBASE-20450	Provide metrics for number of total active, priority and replication rpc handlers	Major	metrics
HBASE-20810	Include the procedure id in the exception message in HBaseAdmin for better debugging	Major	Admin, proc-v2
HBASE-20040	Master UI should include "Cluster Key" needed to use the cluster as a replication sink	Minor	Replication, Usability
HBASE-20095	Redesign single instance pool in CleanerChore	Critical	.
HBASE-19164	Avoid UUID.randomUUID in tests	Major	test
HBASE-20739	Add priority for SCP	Major	Recovery
HBASE-20737	put collection into ArrayList instead of addAll function	Trivial	.
HBASE-20695	Implement table level RegionServer replication metrics	Minor	metrics
HBASE-20733	QABot should run checkstyle tests if the checkstyle configs change	Minor	build, community
HBASE-20625	refactor some WALCellCodec related code	Minor	wal
HBASE-19852	HBase Thrift 1 server SPNEGO Improvements	Major	Thrift
HBASE-20579	Improve snapshot manifest copy in ExportSnapshot	Minor	mapreduce
HBASE-20444	Improve version comparison logic for HBase specific version string and add unit tests	Major	util
HBASE-20594	provide utility to compare old and new descriptors	Major	.
HBASE-20640	TestQuotaGlobalsSettingsBypass missing test category and ClassRule	Critical	test
HBASE-20478	move import checks from hbaseanti to checkstyle	Minor	test
HBASE-20548	Master fails to startup on large clusters, refreshing block distribution	Major	.
HBASE-20488	PE tool prints full name in help message	Minor	shell
HBASE-20567	Pass both old and new descriptors to pre/post hooks of modify operations for table and namespace	Major	.
HBASE-20545	Improve performance of BaseLoadBalancer.retainAssignment	Major	Balancer
HBASE-16191	Add stop_regionserver and stop_master to shell	Major	.
HBASE-20536	Make TestRegionServerAccounting stable and it should not use absolute number	Minor	.
HBASE-20523	PE tool should support configuring client side buffering sizes	Minor	.
HBASE-20527	Remove unused code in MetaTableAccessor	Trivial	.
HBASE-20507	Do not need to call recoverLease on the broken file when we fail to create a wal writer	Major	wal
HBASE-20484	Remove the unnecessary autoboxing in FilterListBase	Trivial	.
HBASE-20327	When qualifier is not specified, append and incr operation do not work (shell)	Minor	shell
HBASE-20389	Move website building flags into a profile	Minor	build, website
HBASE-20379	shadedjars yetus plugin should add a footer link	Major	test
HBASE-20243	[Shell] Add shell command to create a new table by cloning the existent table	Minor	shell
HBASE-20286	Improving shell command compaction_state	Minor	shell
HBASE-19488	Move to using Apache commons CollectionUtils	Trivial	.
HBASE-20197	Review of ByteBufferWriterOutputStream.java	Minor	.
HBASE-20047	AuthenticationTokenIdentifier should provide a toString	Minor	Usability
HBASE-19024	Configurable default durability for synchronous WAL	Critical	wal
HBASE-19389	Limit concurrency of put with dense (hundreds) columns to prevent write handler exhausted	Critical	Performance
HBASE-20186	Improve RSGroupBasedLoadBalancer#balanceCluster() to be more efficient when calculating cluster state for each rsgroup	Minor	rsgroup
HBASE-19449	Minor logging change in HFileArchiver	Trivial	.
HBASE-20120	Remove some unused classes/ java files from hbase-server	Minor	.

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-20854	Wrong retries number in RpcRetryingCaller's log message	Minor	Client, logging
HBASE-20784	Will lose the SNAPSHOT suffix if we get the version of RS from ServerManager	Minor	master, UI
HBASE-20822	TestAsyncNonMetaRegionLocator is flakey	Major	asyncclient
HBASE-20808	Wrong shutdown order between Chores and ChoreService	Minor	.
HBASE-20789	TestBucketCache#testCacheBlockNextBlockMetadataMissing is flaky	Major	.
HBASE-20829	Remove the addFront assertion in MasterProcedureScheduler.doAdd	Major	Replication
HBASE-20825	Fix pre and post hooks of CloneSnapshot and RestoreSnapshot for Access checks	Major	security
HBASE-20812	Add defaults to Table Interface so implementors don't have to	Major	.
HBASE-20817	Infinite loop when executing ReopenTableRegionsProcedure	Blocker	Region Assignment
HBASE-20792	info:servername and info:sn inconsistent for OPEN region	Blocker	Region Assignment
HBASE-20769	getSplits() has a out of bounds problem in TableSnapshotInputFormatImpl	Major	.
HBASE-20732	Shutdown scan pool when master is stopped.	Minor	.
HBASE-20785	NPE getting metrics in PE testing scans	Major	Performance
HBASE-20795	Allow option in BBKVComparator.compare to do comparison without sequence id	Major	.
HBASE-20777	RpcConnection could still remain opened after we shutdown the NettyRpcServer	Major	rpc
HBASE-20403	Prefetch sometimes doesn't work with encrypted file system	Major	.
HBASE-20635	Support to convert the shaded user permission proto to client user permission object	Major	.
HBASE-20778	Make it so WALPE runs on DFS	Major	test
HBASE-20775	TestMultiParallel is flakey	Major	Region Assignment
HBASE-20752	Make sure the regions are truly reopened after ReopenTableRegionsProcedure	Major	proc-v2
HBASE-18622	Mitigate API compatibility concerns between branch-1 and branch-2	Blocker	API
HBASE-20767	Always close hbaseAdmin along with connection in HBTU	Major	test
HBASE-20642	IntegrationTestDDLMasterFailover throws 'InvalidFamilyOperationException	Major	.
HBASE-20742	Always create WAL directory for region server	Major	wal
HBASE-20708	Remove the usage of RecoverMetaProcedure in master startup	Blocker	proc-v2, Region Assignment
HBASE-20723	Custom hbase.wal.dir results in data loss because we write recovered edits into a different place than where the recovering region server looks for them	Critical	Recovery, wal
HBASE-20681	IntegrationTestDriver fails after HADOOP-15406 due to missing hamcrest-core	Major	integration tests
HBASE-20561	The way we stop a ReplicationSource may cause the RS down	Major	Replication
HBASE-19377	Compatibility checker complaining about hash collisions	Major	community
HBASE-20689	Docker fails to install rubocop for precommit	Blocker	build
HBASE-20707	Move MissingSwitchDefault check from checkstyle to error-prone	Major	build
HBASE-20699	QuotaCache should cancel the QuotaRefresherChore service inside its stop()	Major	.
HBASE-20590	REST Java client is not able to negotiate with the server in the secure mode	Critical	REST, security
HBASE-20683	Incorrect return value for PreUpgradeValidator	Critical	.
HBASE-20684	org.apache.hadoop.hbase.client.Scan#setStopRow javadoc uses incorrect method	Trivial	Client, documentation
HBASE-20678	NPE in ReplicationSourceManager#NodeFailoverWorker	Minor	.
HBASE-20670	NPE in HMaster#isInMaintenanceMode	Minor	.
HBASE-20634	Reopen region while server crash can cause the procedure to be stuck	Critical	.
HBASE-12882	Log level for org.apache.hadoop.hbase package should be configurable	Major	.
HBASE-20668	Avoid permission change if ExportSnapshot's copy fails	Major	.
HBASE-18116	Replication source in-memory accounting should not include bulk transfer hfiles	Major	Replication
HBASE-20602	hbase.master.quota.observer.ignore property seems to be not taking effect	Minor	documentation
HBASE-20664	Variable shared across multiple threads	Major	.
HBASE-20659	Implement a reopen table regions procedure	Major	.
HBASE-20582	Bump up JRuby version because of some reported vulnerabilities	Major	dependencies, shell
HBASE-20533	Fix the flaky TestAssignmentManagerMetrics	Major	.
HBASE-20597	Use a lock to serialize access to a shared reference to ZooKeeperWatcher in HBaseReplicationEndpoint	Minor	Replication
HBASE-20633	Dropping a table containing a disable violation policy fails to remove the quota upon table delete	Major	.
HBASE-20645	Fix security_available method in security.rb	Major	.
HBASE-20612	TestReplicationKillSlaveRSWithSeparateOldWALs sometimes fail because it uses an expired cluster conn	Major	.
HBASE-20648	HBASE-19364 "Truncate_preserve fails with table when replica region > 1" for master branch	Major	.
HBASE-20588	Space quota change after quota violation doesn't seem to take in effect	Major	regionserver
HBASE-20616	TruncateTableProcedure is stuck in retry loop in TRUNCATE_TABLE_CREATE_FS_LAYOUT state	Major	amv2
HBASE-20638	nightly source artifact testing should fail the stage if it's going to report an error on jira	Major	test
HBASE-20624	Race in ReplicationSource which causes walEntryFilter being null when creating new shipper	Major	Replication
HBASE-20601	Add multiPut support and other miscellaneous to PE	Minor	tooling
HBASE-20627	Relocate RS Group pre/post hooks from RSGroupAdminServer to RSGroupAdminEndpoint	Major	.
HBASE-20591	nightly job doesn't respect maven options	Critical	test
HBASE-20560	Revisit the TestReplicationDroppedTables ut	Major	.
HBASE-20571	JMXJsonServlet generates invalid JSON if it has NaN in metrics	Major	UI
HBASE-20585	Need to clear peer map when clearing MasterProcedureScheduler	Major	proc-v2
HBASE-20457	Return immediately for a scan rpc call when we want to switch from pread to stream	Major	scan
HBASE-20447	Only fail cacheBlock if block collisions aren't related to next block metadata	Major	BlockCache, BucketCache
HBASE-20544	downstream HBaseTestingUtility fails with invalid port	Blocker	test
HBASE-20004	Client is not able to execute REST queries in a secure cluster	Minor	REST, security
HBASE-20475	Fix the flaky TestReplicationDroppedTables unit test.	Major	.
HBASE-20554	"WALs outstanding" message from CleanerChore is noisy	Trivial	.
HBASE-20204	Add locking to RefreshFileConnections in BucketCache	Major	BucketCache
HBASE-20485	Copy constructor of Scan doesn't copy the readType and replicaId	Minor	.
HBASE-20543	Fix the flaky TestThriftHttpServer	Major	.
HBASE-20521	TableOutputFormat.checkOutputSpecs conf checking sequence cause pig script run fail	Major	mapreduce
HBASE-20500	[rsgroup] should keep at least one server in default group	Major	rsgroup
HBASE-20517	Fix PerformanceEvaluation 'column' parameter	Major	test
HBASE-20524	Need to clear metrics when ReplicationSourceManager refresh replication sources	Minor	.
HBASE-20476	Open sequence number could go backwards in AssignProcedure	Major	Region Assignment
HBASE-20506	Add doc and test for unused RetryCounter, useful-looking utility	Minor	.
HBASE-20492	UnassignProcedure is stuck in retry loop on region stuck in OPENING state	Critical	amv2
HBASE-20497	The getRecoveredQueueStartPos always return 0 in RecoveredReplicationSourceShipper	Major	Replication
HBASE-18842	The hbase shell clone_snaphost command returns bad error message	Minor	shell
HBASE-20466	Consistently use override mechanism for exempt classes in CoprocessClassloader	Major	Coprocessors
HBASE-20006	TestRestoreSnapshotFromClientWithRegionReplicas is flakey	Critical	read replicas
HBASE-18059	The scanner order for memstore scanners are wrong	Critical	regionserver, scan, Scanners
HBASE-20404	Ugly cleanerchore complaint that dir is not empty	Major	master
HBASE-20419	Fix potential NPE in ZKUtil#listChildrenAndWatchForNewChildren callers	Major	.
HBASE-20364	nightly job gives old results or no results for stages that timeout on SCM	Critical	test
HBASE-20335	nightly jobs no longer contain machine information	Critical	test
HBASE-20338	WALProcedureStore#recoverLease() should have fixed sleeps for retrying rollWriter()	Major	.
HBASE-20356	make skipping protoc possible	Critical	dependencies, thirdparty
HBASE-15291	FileSystem not closed in secure bulkLoad	Major	.
HBASE-20068	Hadoopcheck project health check uses default maven repo instead of yetus managed ones	Major	community, test
HBASE-20361	Non-successive TableInputSplits may wrongly be merged by auto balancing feature	Major	mapreduce
HBASE-20260	Purge old content from the book for branch-2/master	Critical	documentation
HBASE-20058	improper quoting in presplitting command docs	Minor	documentation
HBASE-19923	Reset peer state and config when refresh replication source failed	Major	Replication
HBASE-19748	TestRegionReplicaFailover and TestRegionReplicaReplicationEndpoint UT hangs	Major	.

TESTS:

JIRA	Summary	Priority	Component
HBASE-20667	Rename TestGlobalThrottler to TestReplicationGlobalThrottler	Trivial	.
HBASE-20646	TestWALProcedureStoreOnHDFS failing on branch-1	Trivial	.
HBASE-20505	PE should support multi column family read and write cases	Minor	.
HBASE-20513	Collect and emit ScanMetrics in PerformanceEvaluation	Minor	test
HBASE-20414	TestLockProcedure#testMultipleLocks may fail on slow machine	Major	.

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-20831	Copy master doc into branch-2.1 and edit to make it suit 2.1.0	Blocker	documentation
HBASE-20839	Fallback to FSHLog if we can not instantiated AsyncFSWAL when user does not specify AsyncFSWAL explicitly	Blocker	wal
HBASE-20244	NoSuchMethodException when retrieving private method decryptEncryptedDataEncryptionKey from DFSClient	Blocker	wal
HBASE-20193	Basic Replication Web UI - Regionserver	Critical	Replication, Usability
HBASE-20489	Update Reference Guide that CLUSTER_KEY value is present on the Master UI info page.	Minor	documentation
HBASE-19722	Meta query statistics metrics source	Major	.
HBASE-20781	Save recalculating families in a WALEdit batch of Cells	Major	Performance
HBASE-20194	Basic Replication WebUI - Master	Critical	Replication, Usability
HBASE-20780	ServerRpcConnection logging cleanup	Major	logging, Performance
HBASE-19764	Fix Checkstyle errors in hbase-endpoint	Minor	.
HBASE-20710	extra cloneFamily() in Mutation.add(Cell)	Minor	regionserver
HBASE-18569	Add prefetch support for async region locator	Major	asyncclient, Client
HBASE-20706	[hack] Don't add known not-OPEN regions in reopen phase of MTP	Critical	amv2
HBASE-20334	add a test that expressly uses both our shaded client and the one from hadoop 3	Major	hadoop3, shading
HBASE-20615	emphasize use of shaded client jars when they're present in an install	Major	build, Client, Usability
HBASE-20333	break up shaded client into one with no Hadoop and one that's standalone	Critical	shading
HBASE-20332	shaded mapreduce module shouldn't include hadoop	Critical	mapreduce, shading
HBASE-20722	Make RegionServerTracker only depend on children changed event	Major	.
HBASE-20700	Move meta region when server crash can cause the procedure to be stuck	Critical	master, proc-v2, Region Assignment
HBASE-20628	SegmentScanner does over-comparing when one flushing	Critical	Performance
HBASE-19761	Fix Checkstyle errors in hbase-zookeeper	Minor	.
HBASE-19724	Fix Checkstyle errors in hbase-hadoop2-compat	Minor	.
HBASE-20518	Need to serialize the enabled field for UpdatePeerConfigProcedure	Major	Replication
HBASE-20481	Replicate entries from same region serially in ReplicationEndpoint for serial replication	Major	.
HBASE-20378	Provide a hbck option to cleanup replication barrier for a table	Major	.
HBASE-20128	Add new UTs which extends the old replication UTs but set replication scope to SERIAL	Major	.
HBASE-20417	Do not read wal entries when peer is disabled	Major	Replication
HBASE-20294	Also cleanup last pushed sequence id in ReplicationBarrierCleaner	Major	Replication
HBASE-20377	Deal with table in enabling and disabling state when modifying serial replication peer	Major	Replication
HBASE-20367	Write a replication barrier for regions when disabling a table	Major	Replication
HBASE-20296	Remove last pushed sequence ids when removing tables from a peer	Major	Replication
HBASE-20285	Delete all last pushed sequence ids when removing a peer or removing the serial flag for a peer	Major	Replication
HBASE-20138	Find a way to deal with the conflicts when updating replication position	Major	Replication
HBASE-20127	Add UT for serial replication after failover	Major	Replication, test
HBASE-20271	ReplicationSourceWALReader.switched should use the file name instead of the path object directly	Major	Replication
HBASE-20227	Add UT for ReplicationUtils.contains method	Major	Replication, test
HBASE-20147	Serial replication will be stuck if we create a table with serial replication but add it to a peer after there are region moves	Major	.
HBASE-20116	Optimize the region last pushed sequence id layout on zk	Major	Replication
HBASE-20242	The open sequence number will grow if we fail to open a region after writing the max sequence id file	Major	.
HBASE-20155	update branch-2 version to 2.1.0-SNAPSHOT	Major	build, community
HBASE-20206	WALEntryStream should not switch WAL file silently	Major	Replication
HBASE-20117	Cleanup the unused replication barriers in meta table	Major	master, Replication
HBASE-20165	Shell command to make a normal peer to be a serial replication peer	Major	.
HBASE-20167	Optimize the implementation of ReplicationSourceWALReader	Major	Replication
HBASE-20125	Add UT for serial replication after region split and merge	Major	Replication
HBASE-20129	Add UT for serial replication checker	Major	Replication
HBASE-20115	Reimplement serial replication based on the new replication storage layer	Major	Replication
HBASE-20050	Reimplement updateReplicationPositions logic in serial replication based on the newly introduced replication storage layer	Major	.
HBASE-20082	Fix findbugs errors only on master which are introduced by HBASE-19397	Major	findbugs
HBASE-19936	Introduce a new base class for replication peer procedure	Major	.
HBASE-19719	Fix checkstyle issues	Major	proc-v2, Replication
HBASE-19711	TestReplicationAdmin.testConcurrentPeerOperations hangs	Major	proc-v2
HBASE-19707	Race in start and terminate of a replication source after we async start replicatione endpoint	Major	proc-v2, Replication
HBASE-19636	All rs should already start work with the new peer change when replication peer procedure is finished	Major	proc-v2, Replication
HBASE-19634	Add permission check for executeProcedures in AccessController	Major	proc-v2, Replication
HBASE-19697	Remove TestReplicationAdminUsingProcedure	Major	proc-v2, Replication
HBASE-19661	Replace ReplicationStateZKBase with ZKReplicationStorageBase	Major	proc-v2, Replication
HBASE-19687	Move the logic in ReplicationZKNodeCleaner to ReplicationChecker and remove ReplicationZKNodeCleanerChore	Major	proc-v2, Replication
HBASE-19544	Add UTs for testing concurrent modifications on replication peer	Major	proc-v2, Replication, test
HBASE-19686	Use KeyLocker instead of ReentrantLock in PeerProcedureHandlerImpl	Major	proc-v2, Replication
HBASE-19623	Create replication endpoint asynchronously when adding a replication source	Major	proc-v2, Replication
HBASE-19633	Clean up the replication queues in the postPeerModification stage when removing a peer	Major	proc-v2, Replication
HBASE-19622	Reimplement ReplicationPeers with the new replication storage interface	Major	proc-v2, Replication
HBASE-19635	Introduce a thread at RS side to call reportProcedureDone	Major	proc-v2
HBASE-19617	Remove ReplicationQueues, use ReplicationQueueStorage directly	Major	Replication
HBASE-19642	Fix locking for peer modification procedure	Critical	proc-v2, Replication
HBASE-19592	Add UTs to test retry on update zk failure	Major	proc-v2, Replication
HBASE-19630	Add peer cluster key check when add new replication peer	Major	proc-v2, Replication
HBASE-19573	Rewrite ReplicationPeer with the new replication storage interface	Major	proc-v2, Replication
HBASE-19579	Add peer lock test for shell command list_locks	Major	proc-v2, Replication
HBASE-19599	Remove ReplicationQueuesClient, use ReplicationQueueStorage directly	Major	Replication
HBASE-19543	Abstract a replication storage interface to extract the zk specific code	Major	proc-v2, Replication
HBASE-19525	RS side changes for moving peer modification from zk watcher to procedure	Major	proc-v2, Replication
HBASE-19580	Use slf4j instead of commons-logging in new, just-added Peer Procedure classes	Major	proc-v2, Replication
HBASE-19520	Add UTs for the new lock type PEER	Major	proc-v2
HBASE-19564	Procedure id is missing in the response of peer related operations	Major	proc-v2, Replication
HBASE-19536	Client side changes for moving peer modification from zk watcher to procedure	Major	Replication
HBASE-19524	Master side changes for moving peer modification from zk watcher to procedure	Major	proc-v2, Replication
HBASE-19216	Implement a general framework to execute remote procedure on RS	Major	proc-v2, Replication

OTHER:

JIRA	Summary	Priority	Component
HBASE-19997	[rolling upgrade] 1.x => 2.x	Blocker	.
HBASE-20360	Further optimization for serial replication	Major	Replication
HBASE-20862	Address 2.1.0 Compatibility Report Issues	Blocker	compatibility
HBASE-20665	"Already cached block XXX" message should be DEBUG	Minor	BlockCache
HBASE-20677	Backport test of HBASE-20566 'Creating a system table after enabling rsgroup feature puts region into RIT' to branch-2	Major	.
HBASE-19475	Extend backporting strategy in documentation	Trivial	documentation
HBASE-20595	Remove the concept of 'special tables' from rsgroups	Major	Region Assignment, rsgroup
HBASE-20415	branches-2 don't need maven-scala-plugin	Major	build
HBASE-20112	Include test results from nightly hadoop3 tests in jenkins test results	Critical	test
HBASE-17918	document serial replication	Critical	documentation, Replication
HBASE-19737	Manage a HBASE-19397-branch-2 branch and merge it to branch-2	Major	proc-v2, Replication

Release 2.0.0 - Unreleased (as of 2018-04-22)

INCOMPATIBLE CHANGES:

JIRA	Summary	Priority	Component
HBASE-20276	[shell] Revert shell REPL change and document	Blocker	documentation, shell
HBASE-16459	Remove unused hbase shell --format option	Trivial	shell
HBASE-19128	Purge Distributed Log Replay from codebase, configurations, text; mark the feature as unsupported, broken.	Major	documentation
HBASE-19504	Add TimeRange support into checkAndMutate	Major	.
HBASE-20119	Introduce a pojo class to carry coprocessor information in order to make TableDescriptorBuilder accept multiple cp at once	Minor	.
HBASE-19437	Batch operation can't handle the null result for Append/Increment	Critical	Usability
HBASE-19873	Add a CategoryBasedTimeout ClassRule for all UTs	Major	.
HBASE-19783	Change replication peer cluster key/endpoint from a not-null value to null is not allowed	Minor	Replication
HBASE-19483	Add proper privilege check for rsgroup commands	Major	rsgroup, security
HBASE-19492	Add EXCLUDE_NAMESPACE and EXCLUDE_TABLECFS support to replication peer config	Major	.
HBASE-19357	Bucket cache no longer L2 for LRU cache	Major	.
HBASE-19359	Revisit the default config of hbase client retries number	Major	.
HBASE-19092	Make Tag IA.LimitedPrivate and expose for CPs	Critical	Coprocessors
HBASE-19187	Remove option to create on heap bucket cache	Minor	regionserver
HBASE-19033	Allow CP users to change versions and TTL before opening StoreScanner	Blocker	Coprocessors
HBASE-19047	CP exposed Scanner types should not extend Shipper	Critical	Coprocessors
HBASE-18905	Allow CPs to request flush on Region and know the completion of the requested flush	Major	Coprocessors
HBASE-18410	FilterList Improvement.	Major	Filters
HBASE-18893	Remove Add/Modify/DeleteColumnFamilyProcedure in favor of using ModifyTableProcedure	Major	Coprocessors, master
HBASE-19067	Do not expose getHDFSBlockDistribution in StoreFile	Major	Coprocessors
HBASE-18989	Polish the compaction related CP hooks	Major	Compaction, Coprocessors
HBASE-19046	RegionObserver#postCompactSelection Avoid passing shaded ImmutableList param	Major	Coprocessors
HBASE-19001	Remove the hooks in RegionObserver which are designed to construct a StoreScanner which is marked as IA.Private	Major	Coprocessors
HBASE-14247	Separate the old WALs into different regionserver directories	Critical	wal
HBASE-18183	Region interface cleanup for CP expose	Major	Coprocessors
HBASE-18878	Use Optional<T> return types when T can be null	Major	Coprocessors
HBASE-18649	Deprecate KV Usage in MR to move to Cells in 3.0	Major	API, mapreduce
HBASE-18897	Substitute MemStore for Memstore	Major	.
HBASE-18883	Upgrade to Curator 4.0	Major	Client, dependencies
HBASE-18839	Apply RegionInfo to code base	Major	Coprocessors
HBASE-18826	Use HStore instead of Store in our own code base and remove unnecessary methods in Store interface	Major	Coprocessors
HBASE-17732	Coprocessor Design Improvements	Critical	Coprocessors
HBASE-18298	RegionServerServices Interface cleanup for CP expose	Critical	Coprocessors
HBASE-16769	Deprecate/remove PB references from MasterObserver and RegionServerObserver	Blocker	.
HBASE-18859	Purge PB from BulkLoadObserver	Major	Coprocessors
HBASE-18731	[compat 1-2] Mark protected methods of QuotaSettings that touch Protobuf internals as IA.Private	Major	API
HBASE-18825	Use HStoreFile instead of StoreFile in our own code base and remove unnecessary methods in StoreFile interface	Major	Coprocessors
HBASE-18142	Deletion of a cell deletes the previous versions too	Major	API, shell
HBASE-18446	Mark StoreFileScanner/StoreFileReader as IA.LimitedPrivate(Phoenix)	Critical	Coprocessors
HBASE-18798	Remove the unused methods in RegionServerObserver	Major	Coprocessors
HBASE-18453	CompactionRequest should not be exposed to user directly	Major	Coprocessors
HBASE-18794	Remove deprecated methods in MasterObserver	Major	Coprocessors
HBASE-17823	Migrate to Apache Yetus Audience Annotations	Major	API
HBASE-18793	Remove deprecated methods in RegionObserver	Major	Coprocessors
HBASE-18733	[compat 1-2] Hide WALKey	Major	API
HBASE-16479	Move WALEdit from hbase.regionserver.wal package to hbase.wal package	Major	wal
HBASE-18783	Declare the builder of ClusterStatus as IA.Private, and remove the Writables from ClusterStatus	Minor	.
HBASE-18106	Redo ProcedureInfo and LockInfo	Critical	proc-v2
HBASE-18780	Remove HLogPrettyPrinter and hlog command	Minor	documentation, wal
HBASE-18704	Upgrade hbase to commons-collections 4	Major	dependencies
HBASE-15607	Remove PB references from Admin for 2.0	Blocker	.
HBASE-18736	Cleanup the HTD/HCD for Admin	Major	.
HBASE-18577	shaded client includes several non-relocated third party dependencies	Critical	Client
HBASE-3935	HServerLoad.storefileIndexSizeMB should be changed to storefileIndexSizeKB	Major	.
HBASE-15982	Interface ReplicationEndpoint extends Guava's Service	Blocker	.
HBASE-18546	Always overwrite the TS for Append/Increment unless no existing cells are found	Critical	API, Client
HBASE-17442	Move most of the replication related classes from hbase-client to hbase-replication package	Critical	build, Replication
HBASE-18511	Default no regions on master	Blocker	master
HBASE-18528	DON'T allow user to modify the passed table/column descriptor	Critical	Coprocessors, master
HBASE-18469	Correct RegionServer metric of totalRequestCount	Critical	metrics, regionserver
HBASE-18500	Performance issue: Don't use BufferedMutator for HTable's put method	Major	.
HBASE-17125	Inconsistent result when use filter to read data	Critical	.
HBASE-18517	limit max log message width in log4j	Major	.
HBASE-18502	Change MasterObserver to use TableDescriptor and ColumnFamilyDescriptor	Critical	Coprocessors, master
HBASE-18374	RegionServer Metrics improvements	Major	.
HBASE-17908	Upgrade guava	Critical	dependencies
HBASE-18161	Incremental Load support for Multiple-Table HFileOutputFormat	Minor	.
HBASE-18267	The result from the postAppend is ignored	Major	Coprocessors
HBASE-18241	Change client.Table, client.Admin, Region, Store, and HBaseTestingUtility to not use HTableDescriptor or HColumnDescriptor	Critical	Client
HBASE-18038	Rename StoreFile to HStoreFile and add a StoreFile interface for CP	Critical	Coprocessors, regionserver
HBASE-16196	Update jruby to a newer version.	Critical	dependencies, shell
HBASE-14614	Procedure v2: Core Assignment Manager	Major	proc-v2
HBASE-3462	Fix table.jsp in regards to splitting a region/table with an optional splitkey	Major	master
HBASE-11013	Clone Snapshots on Secure Cluster Should provide option to apply Retained User Permissions	Major	snapshots
HBASE-15296	Break out writer and reader from StoreFile	Major	regionserver
HBASE-15199	Move jruby jar so only on hbase-shell module classpath; currently globally available	Critical	dependencies, jruby, shell
HBASE-18009	Move RpcServer.Call to a separated file	Major	IPC/RPC
HBASE-17956	Raw scan should ignore TTL	Major	scan
HBASE-17914	Create a new reader instead of cloning a new StoreFile when compaction	Major	Compaction, regionserver
HBASE-17595	Add partial result support for small/limited scan	Critical	asyncclient, Client, scan
HBASE-17584	Expose ScanMetrics with ResultScanner rather than Scan	Major	Client, mapreduce, scan
HBASE-17716	Formalize Scan Metric names	Minor	metrics
HBASE-17312	[JDK8] Use default method for Observer Coprocessors	Major	Coprocessors
HBASE-17647	OffheapKeyValue#heapSize() implementation is wrong	Major	regionserver
HBASE-17472	Correct the semantic of permission grant	Major	Admin
HBASE-17599	Use mayHaveMoreCellsInRow instead of isPartial	Major	Client, scan
HBASE-17508	Unify the implementation of small scan and regular scan for sync client	Major	Client, scan
HBASE-12894	Upgrade Jetty to 9.2.6	Critical	REST, UI
HBASE-16786	Procedure V2 - Move ZK-lock's uses to Procedure framework locks (LockProcedure)	Major	.
HBASE-17470	Remove merge region code from region server	Major	regionserver
HBASE-5401	PerformanceEvaluation generates 10x the number of expected mappers	Major	test
HBASE-17221	Abstract out an interface for RpcServer.Call	Major	.
HBASE-16119	Procedure v2 - Reimplement merge	Major	proc-v2, Region Assignment
HBASE-17132	Cleanup deprecated code for WAL	Major	wal
HBASE-17017	Remove the current per-region latency histogram metrics	Major	metrics
HBASE-15513	hbase.hregion.memstore.chunkpool.maxsize is 0.0 by default	Major	.
HBASE-16972	Log more details for Scan#next request when responseTooSlow	Major	Operability
HBASE-16765	New SteppingRegionSplitPolicy, avoid too aggressive spread of regions for small tables.	Critical	.
HBASE-16747	Track memstore data size and heap overhead separately	Major	regionserver
HBASE-14551	Procedure v2 - Reimplement split	Minor	proc-v2
HBASE-16729	Define the behavior of (default) empty FilterList	Trivial	.
HBASE-16799	CP exposed Store should not expose unwanted APIs	Major	.
HBASE-16117	Fix Connection leak in mapred.TableOutputFormat	Major	mapreduce
HBASE-15638	Shade protobuf	Critical	Protobufs
HBASE-16257	Move staging dir to be under hbase root dir	Blocker	.
HBASE-16650	Wrong usage of BlockCache eviction stat for heap memory tuning	Major	.
HBASE-16598	Enable zookeeper useMulti always and clean up in HBase code	Major	.
HBASE-15297	error message is wrong when a wrong namspace is specified in grant in hbase shell	Minor	shell
HBASE-16340	ensure no Xerces jars included	Critical	dependencies
HBASE-16321	Ensure findbugs jsr305 jar isn't present	Blocker	dependencies
HBASE-16355	hbase-client dependency on hbase-common test-jar should be test scope	Major	Client, dependencies
HBASE-16186	Fix AssignmentManager MBean name	Major	master
HBASE-13823	Procedure V2: unnecessaery operations on AssignmentManager#recoverTableInDisablingState() and recoverTableInEnablingState()	Major	master, proc-v2
HBASE-15950	Fix memstore size estimates to be more tighter	Major	.
HBASE-15971	Regression: Random Read/WorkloadC slower in 1.x than 0.98	Critical	rpc
HBASE-15875	Remove HTable references and HTableInterface	Major	.
HBASE-15610	Remove deprecated HConnection for 2.0 thus removing all PB references for 2.0	Blocker	.
HBASE-15876	Remove doBulkLoad(Path hfofDir, final HTable table) though it has not been through a full deprecation cycle	Blocker	.
HBASE-15575	Rename table DDL *Handler methods in MasterObserver to more meaningful names	Minor	Coprocessors
HBASE-15481	Add pre/post roll to WALObserver	Trivial	.
HBASE-15568	Procedure V2 - Remove CreateTableHandler in HBase Apache 2.0 release	Major	master, proc-v2
HBASE-15521	Procedure V2 - RestoreSnapshot and CloneSnapshot	Major	Client, master, proc-v2
HBASE-11393	Replication TableCfs should be a PB object rather than a string	Major	Replication
HBASE-15265	Implement an asynchronous FSHLog	Major	wal
HBASE-15323	Hbase Rest CheckAndDeleteAPi should be able to delete more cells	Major	hbase
HBASE-15377	Per-RS Get metric is time based, per-region metric is size-based	Major	.
HBASE-13963	avoid leaking jdk.tools	Critical	build, documentation
HBASE-15376	ScanNext metric is size-based while every other per-operation metric is time based	Major	.
HBASE-15290	Hbase Rest CheckAndAPI should save other cells along with compared cell	Major	hbase
HBASE-15100	Master WALProcs still never clean up	Blocker	master, proc-v2
HBASE-15111	"hbase version" should write to stdout	Trivial	util
HBASE-14888	ClusterSchema: Add Namespace Operations	Major	API
HBASE-15018	Inconsistent way of handling TimeoutException in the rpc client implementations	Major	Client, IPC/RPC
HBASE-14205	RegionCoprocessorHost System.nanoTime() performance bottleneck	Critical	Coprocessors, Performance, regionserver
HBASE-12751	Allow RowLock to be reader writer	Major	regionserver
HBASE-13706	CoprocessorClassLoader should not exempt Hive classes	Minor	Coprocessors
HBASE-13954	Remove HTableInterface#getRowOrBefore related server side code	Major	API
HBASE-12296	Filters should work with ByteBufferedCell	Major	regionserver, Scanners
HBASE-14027	Clean up netty dependencies	Major	build
HBASE-7782	HBaseTestingUtility.truncateTable() not acting like CLI	Minor	test
HBASE-14047	Cleanup deprecated APIs from Cell class	Major	Client
HBASE-13849	Remove restore and clone snapshot from the WebUI	Major	snapshots
HBASE-13646	HRegion#execService should not try to build incomplete messages	Major	Coprocessors, regionserver
HBASE-13983	Doc how the oddball HTable methods getStartKey, getEndKey, etc. will be removed in 2.0.0	Minor	documentation
HBASE-13214	Remove deprecated and unused methods from HTable class	Major	API
HBASE-13843	Fix internal constant text in ReplicationManager.java	Trivial	master
HBASE-13375	Provide HBase superuser higher priority over other users in the RPC handling	Major	IPC/RPC
HBASE-13636	Remove deprecation for HBASE-4072 (Reading of zoo.cfg)	Major	.
HBASE-10800	Use CellComparator instead of KVComparator	Major	.
HBASE-13118	[PE] Add being able to write many columns	Major	test
HBASE-12990	MetaScanner should be replaced by MetaTableAccessor	Major	Client
HBASE-13373	Squash HFileReaderV3 together with HFileReaderV2 and AbstractHFileReader; ditto for Scanners and BlockReader, etc.	Major	.
HBASE-10728	get_counter value is never used.	Major	.
HBASE-13298	Clarify if Table.{set|get}WriteBufferSize() is deprecated or not	Critical	API
HBASE-13248	Make HConnectionImplementation top-level class.	Major	API
HBASE-13198	Remove HConnectionManager	Major	API
HBASE-12586	Task 6 & 7 from HBASE-9117, delete all public HTable constructors and delete ConnectionManager#{delete,get}Connection	Major	.
HBASE-13171	Change AccessControlClient methods to accept connection object to reduce setup time.	Minor	.
HBASE-6778	Deprecate Chore; its a thread per task when we should have one thread to do all tasks	Major	.
HBASE-12684	Add new AsyncRpcClient	Major	Client
HBASE-10378	Divide HLog interface into User and Implementor specific interfaces	Major	wal
HBASE-12111	Remove deprecated APIs from Mutation(s)	Major	Client
HBASE-12084	Remove deprecated APIs from Result	Major	Client
HBASE-12048	Remove deprecated APIs from Filter	Major	regionserver
HBASE-11556	Move HTablePool to hbase-thrift module.	Major	Thrift
HBASE-4072	Deprecate/disable and remove support for reading ZooKeeper zoo.cfg files from the classpath	Major	.

IMPORTANT ISSUES:

JIRA	Summary	Priority	Component
HBASE-15780	Expose AuthUtil as IA.Public	Critical	API, security
HBASE-15322	Operations using Unsafe path broken for platforms not having sun.misc.Unsafe	Critical	hbase
HBASE-15125	HBaseFsck's adoptHdfsOrphan function creates region with wrong end key boundary	Major	hbck

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-19950	Introduce a ColumnValueFilter	Minor	Filters
HBASE-19844	Shell should support flush by regionserver	Minor	shell
HBASE-19886	Display maintenance mode in shell, web UI	Major	.
HBASE-19528	Major Compaction Tool	Major	.
HBASE-19897	RowMutations should follow the fluent pattern	Minor	.
HBASE-4224	Need a flush by regionserver rather than by table option	Major	.
HBASE-15321	Ability to open a HRegion from hdfs snapshot.	Major	.
HBASE-19799	Add web UI to rsgroup	Major	rsgroup, UI
HBASE-19326	Remove decommissioned servers from rsgroup	Major	rsgroup
HBASE-19189	Ad-hoc test job for running a subset of tests lots of times	Major	build
HBASE-19103	Add BigDecimalComparator for filter	Minor	Client
HBASE-18171	Scanning cursor for async client	Major	.
HBASE-18875	Thrift server supports read-only mode	Major	Thrift
HBASE-14417	Incremental backup and bulk loading	Blocker	.
HBASE-18131	Add an hbase shell command to clear deadserver list in ServerManager	Major	Operability
HBASE-15806	An endpoint-based export tool	Critical	Coprocessors, tooling
HBASE-14135	HBase Backup/Restore Phase 3: Merge backup images	Critical	.
HBASE-15134	Add visibility into Flush and Compaction queues	Major	Compaction, metrics, regionserver
HBASE-15968	New behavior of versions considering mvcc and ts rather than ts only	Major	.
HBASE-15943	Add page displaying JVM process metrics	Major	Operability, UI
HBASE-17928	Shell tool to clear compaction queues	Major	Compaction, Operability
HBASE-18226	Disable reverse DNS lookup at HMaster and use the hostname provided by RegionServer	Major	.
HBASE-13784	Add Async Client Table API	Major	.
HBASE-17849	PE tool random read is not totally random	Major	Performance, test
HBASE-15576	Scanning cursor to prevent blocking long time on ResultScanner.next()	Major	.
HBASE-16961	FileSystem Quotas	Major	.
HBASE-17757	Unify blocksize after encoding to decrease memory fragment	Major	.
HBASE-17542	Move backup system table into separate namespace	Major	.
HBASE-14141	HBase Backup/Restore Phase 3: Filter WALs on backup to include only edits from backed up tables	Blocker	.
HBASE-17758	[RSGROUP] Add shell command to move servers and tables at the same time	Major	rsgroup
HBASE-17737	Thrift2 proxy should support scan timeRange per column family	Major	Thrift
HBASE-16981	Expand Mob Compaction Partition policy from daily to weekly, monthly	Major	mob
HBASE-9774	HBase native metrics and metric collection for coprocessors	Major	Coprocessors, metrics
HBASE-17174	Refactor the AsyncProcess, BufferedMutatorImpl, and HTable	Minor	.
HBASE-15432	TableInputFormat - support multi column family scan	Major	.
HBASE-17181	Let HBase thrift2 support TThreadedSelectorServer	Minor	Thrift
HBASE-17151	New API to create HFile.Reader without instantiating block cache	Major	.
HBASE-16463	Improve transparent table/CF encryption with Commons Crypto	Major	encryption
HBASE-16751	Add tuning information to HBase Book	Minor	.
HBASE-16677	Add table size (total store file size) to table page	Minor	website
HBASE-16447	Replication by namespaces config in peer	Critical	Replication
HBASE-16388	Prevent client threads being blocked by only one slow region server	Major	.
HBASE-16213	A new HFileBlock structure for fast random get	Major	Performance
HBASE-12721	Create Docker container cluster infrastructure to enable better testing	Major	build, community, documentation, test
HBASE-3727	MultiHFileOutputFormat	Minor	.
HBASE-15881	Allow BZIP2 compression	Major	HFile
HBASE-10358	Shell changes for setting consistency per request	Major	shell
HBASE-15892	submit-patch.py: Single command line to make patch, upload it to jira, and update review board	Trivial	.
HBASE-15228	Add the methods to RegionObserver to trigger start/complete restoring WALs	Major	Coprocessors
HBASE-15847	VerifyReplication prefix filtering	Major	Replication
HBASE-15798	Add Async RpcChannels to all RpcClients	Major	.
HBASE-15281	Allow the FileSystem inside HFileSystem to be wrapped	Major	Filesystem Integration, hbase
HBASE-15592	Print Procedure WAL content	Major	.
HBASE-6721	RegionServer Group based Assignment	Major	regionserver
HBASE-15136	Explore different queuing behaviors while busy	Critical	IPC/RPC
HBASE-15181	A simple implementation of date based tiered compaction	Major	Compaction
HBASE-13259	mmap() based BucketCache IOEngine	Critical	BlockCache
HBASE-15135	Add metrics for storefile age	Major	.
HBASE-14355	Scan different TimeRange for each column family	Major	Client, regionserver, Scanners
HBASE-11262	Avoid empty columns while doing bulk-load	Major	.
HBASE-15036	Update HBase Spark documentation to include bulk load with thin records	Major	.
HBASE-14980	Project Astro	Major	documentation
HBASE-13153	Bulk Loaded HFile Replication	Major	Replication
HBASE-12911	Client-side metrics	Major	Client, Operability, Performance
HBASE-14529	Respond to SIGHUP to reload config	Major	Operability
HBASE-14459	Add request and response sizes metrics	Major	metrics
HBASE-14456	Implement a namespace-based region grouping strategy for RegionGroupingProvider	Major	.
HBASE-14154	DFS Replication should be configurable at column family level	Minor	.
HBASE-13702	ImportTsv: Add dry-run functionality and log bad rows	Major	.
HBASE-13639	SyncTable - rsync for HBase tables	Major	mapreduce, Operability, tooling
HBASE-10070	HBase read high-availability using timeline-consistent region replicas	Major	Admin, API, LatencyResilience
HBASE-13356	HBase should provide an InputFormat supporting multiple scans in mapreduce jobs over snapshots	Minor	mapreduce
HBASE-5980	Scanner responses from RS should include metrics on rows/KVs filtered	Minor	Client, metrics, Operability, regionserver
HBASE-13698	Add RegionLocator methods to Thrift2 proxy.	Major	Thrift
HBASE-13071	Hbase Streaming Scan Feature	Major	.
HBASE-13090	Progress heartbeats for long running scanners	Major	.
HBASE-13412	Region split decisions should have jitter	Major	regionserver
HBASE-12972	Region, a supportable public/evolving subset of HRegion	Major	.
HBASE-13170	Allow block cache to be external	Major	io
HBASE-5238	Add a log4j category for all edits to META/ROOT	Minor	regionserver
HBASE-13063	Allow to turn off memstore replication for region replicas	Minor	regionserver, Replication
HBASE-13057	Provide client utility to easily enable and disable table replication	Major	Replication
HBASE-12869	Add a REST API implementation of the ClusterManager interface	Major	integration tests
HBASE-12944	Support patches to branches in precommit jenkins build	Major	.
HBASE-12268	Add support for Scan.setRowPrefixFilter to shell	Major	shell
HBASE-5162	Basic client pushback mechanism	Major	.

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-19994	Create a new class for RPC throttling exception, make it retryable.	Major	.
HBASE-20409	Set hbase.client.meta.operation.timeout in TestClientOperationTimeout	Trivial	test
HBASE-17449	Add explicit document on different timeout settings	Critical	documentation
HBASE-18784	Use of filesystem that requires hflush / hsync / append / etc should query outputstream capabilities	Major	Filesystem Integration
HBASE-15466	precommit should not run all java goals when given a docs-only patch	Major	build
HBASE-20135	NullPointerException during reading bloom filter when upgraded from hbase-1 to hbase-2	Minor	.
HBASE-17165	Add retry to LoadIncrementalHFiles tool	Critical	hbase, HFile, tooling
HBASE-18467	nightly job needs to run all stages and then comment on jira	Critical	community, test
HBASE-17448	Export metrics from RecoverableZooKeeper	Major	Zookeeper
HBASE-20055	Remove declaration of un-thrown exceptions and unused setRegionStateBackToOpen() from MergeTableRegionsProcedure	Minor	amv2
HBASE-18020	Update API Compliance Checker to Incorporate Improvements Done in Hadoop	Major	API, community
HBASE-20065	Revisit the timestamp usage in MetaTableAccessor	Major	.
HBASE-18294	Reduce global heap pressure: flush based on heap occupancy	Major	.
HBASE-19680	BufferedMutatorImpl#mutate should wait the result from AP in order to throw the failed mutations	Major	.
HBASE-19988	HRegion#lockRowsAndBuildMiniBatch() is too chatty when interrupted while waiting for a row lock	Minor	amv2
HBASE-19915	From split/ merge procedures daughter/ merged regions get created in OFFLINE state	Major	.
HBASE-19917	Improve RSGroupBasedLoadBalancer#filterServers() to be more efficient	Minor	rsgroup
HBASE-19904	Break dependency of WAL constructor on Replication	Major	Replication, wal
HBASE-19912	The flag "writeToWAL" of Region#checkAndRowMutate is useless	Minor	.
HBASE-19861	Avoid using RPCs when querying table infos for master status pages	Major	UI
HBASE-19770	Add '--return-values' option to Shell to print return values of commands in interactive mode	Critical	shell
HBASE-19823	Make RawCellBuilderFactory LimitedPrivate.UNITTEST	Minor	.
HBASE-19820	Restore public constructor of MiniHBaseCluster (API compat)	Major	.
HBASE-19736	Remove BaseLogCleanerDelegate deprecated #isLogDeletable(FileStatus) and use #isFileDeletable(FileStatus) instead	Minor	.
HBASE-19739	Include thrift IDL files in HBase binary distribution	Minor	Thrift
HBASE-19789	Not exclude flaky tests from nightly builds	Major	.
HBASE-19758	Split TestHCM to several smaller tests	Major	test
HBASE-19751	Use RegionInfo directly instead of an identifier and a namespace when getting WAL	Major	wal
HBASE-19139	Create Async Admin methods for Clear Block Cache	Major	Admin
HBASE-19702	Improve RSGroupInfo constructors	Minor	.
HBASE-19684	BlockCacheKey toString Performance	Trivial	hbase
HBASE-19358	Improve the stability of splitting log when do fail over	Major	MTTR
HBASE-19723	hbase-thrift declares slf4j-api twice	Trivial	Thrift
HBASE-19651	Remove LimitInputStream	Minor	hbase
HBASE-19473	Miscellaneous changes to ClientScanner	Trivial	hbase
HBASE-19613	Miscellaneous changes to WALSplitter	Trivial	hbase
HBASE-18806	VerifyRep by snapshot need not to restore snapshot for each mapper	Major	Replication
HBASE-18011	Refactor RpcServer	Major	IPC/RPC
HBASE-19641	AsyncHBaseAdmin should use exponential backoff when polling the procedure result	Major	asyncclient, proc-v2
HBASE-19675	Miscellaneous HStore Class Improvements	Minor	hbase
HBASE-19683	Remove Superfluous Methods From String Class	Trivial	hbase
HBASE-19676	CleanerChore logging improvements	Trivial	hbase
HBASE-19486	Periodically ensure records are not buffered too long by BufferedMutator	Major	Client
HBASE-19679	Superusers Logging and Data Structures	Trivial	hbase
HBASE-19677	Miscellaneous HFileCleaner Improvements	Trivial	hbase
HBASE-19649	Use singleton feature for ImmutableSegment	Trivial	.
HBASE-8518	Get rid of hbase.hstore.compaction.complete setting	Minor	.
HBASE-19659	Enable -x in make_rc.sh so logs where it is in execution	Trivial	build
HBASE-19647	Logging cleanups; emit regionname when RegionTooBusyException inside RetriesExhausted... make netty connect/disconnect TRACE-level	Major	.
HBASE-19545	Replace getBytes(StandardCharsets.UTF_8) with Bytes.toBytes	Minor	.
HBASE-19615	CompositeImmutableSegment ArrayList Instead of LinkedList	Trivial	hbase
HBASE-19621	Revisit the methods in ReplicationPeerConfigBuilder	Minor	.
HBASE-19618	Remove replicationQueuesClient.class/replicationQueues.class config and remove table based ReplicationQueuesClient/ReplicationQueues implementation	Major	.
HBASE-19576	Introduce builder for ReplicationPeerConfig and make it immutable	Major	.
HBASE-19590	Remove the duplicate code in deprecated ReplicationAdmin	Minor	.
HBASE-19570	Add hadoop3 tests to Nightly master/branch-2 runs	Critical	.
HBASE-19571	Minor refactor of Nightly run scripts	Minor	.
HBASE-19491	Exclude flaky tests from nightly master run	Major	.
HBASE-15482	Provide an option to skip calculating block locations for SnapshotInputFormat	Minor	mapreduce
HBASE-19531	Remove needless volatile declaration	Trivial	.
HBASE-19521	HBase mob compaction need to check hfile version	Critical	Compaction, mob
HBASE-14790	Implement a new DFSOutputStream for logging WAL only	Major	wal
HBASE-19472	Remove ArrayUtil Class	Major	hbase
HBASE-19489	Check against only the latest maintenance release in pre-commit hadoopcheck.	Minor	.
HBASE-17425	Fix calls to deprecated APIs in TestUpdateConfiguration	Trivial	Client
HBASE-19464	Replace StringBuffer with StringBuilder for hbase-common	Trivial	hbase
HBASE-19463	Make CPEnv#getConnection return a facade that throws Unsupported if CP calls #close	Major	Coprocessors
HBASE-19180	Remove unused imports from AlwaysPasses	Trivial	build
HBASE-18169	Coprocessor fix and cleanup before 2.0.0 release	Blocker	Coprocessors
HBASE-19448	Replace StringBuffer with StringBuilder for hbase-server	Trivial	hbase
HBASE-19432	Roll the specified writer in HFileOutputFormat2	Major	.
HBASE-19290	Reduce zk request when doing split log	Major	.
HBASE-19336	Improve rsgroup to allow assign all tables within a specified namespace by only writing namespace	Major	rsgroup
HBASE-19367	Refactoring in RegionStates, and RSProcedureDispatcher	Minor	.
HBASE-19382	Update report-flakies.py script to handle yetus builds	Major	.
HBASE-19252	Move the transform logic of FilterList into transformCell() method to avoid extra ref to question cell	Minor	.
HBASE-19372	Remove the Span object in SyncFuture as it is useless now	Major	tracing, wal
HBASE-18090	Improve TableSnapshotInputFormat to allow more multiple mappers per region	Major	mapreduce
HBASE-16868	Add a replicate_all flag to avoid misuse the namespaces and table-cfs config of replication peer	Critical	Replication
HBASE-19311	Promote TestAcidGuarantees to LargeTests and start mini cluster once to make it faster	Major	test
HBASE-19293	Support adding a new replication peer in disabled state	Major	.
HBASE-16574	Add backup / restore feature to refguide	Major	.
HBASE-19274	Log IOException when unable to determine the size of committed file	Trivial	.
HBASE-19251	Merge RawAsyncTable and AsyncTable	Major	asyncclient, Client
HBASE-19262	Revisit checkstyle rules	Major	build
HBASE-18601	Update Htrace to 4.2	Major	dependencies, tracing
HBASE-19227	Nightly jobs should archive JVM dumpstream files	Critical	build
HBASE-12350	Backport error-prone build support to branch-1 and branch-2	Minor	.
HBASE-19228	nightly job should gather machine stats.	Major	build
HBASE-19186	Unify to use bytes to show size in master/rs ui	Minor	.
HBASE-19027	Honor the CellComparator of ScanInfo in scanning over a store	Major	.
HBASE-13622	document upgrade rollback	Major	documentation
HBASE-18925	Need updated mockito for using java optional	Major	.
HBASE-19140	hbase-cleanup.sh uses deprecated call to remove files in hdfs	Trivial	scripts
HBASE-17065	Perform more effective sorting for RPC Handler Tasks	Minor	.
HBASE-18870	Hbase Backup should set the details to MR job name	Minor	.
HBASE-18602	rsgroup cleanup unassign code	Minor	rsgroup
HBASE-19110	Add default for Server#isStopping & #getFileSystem	Minor	.
HBASE-19091	Code annotation wrote "BinaryComparator" instead of "LongComparator"	Minor	Client
HBASE-18994	Decide if META/System tables should use Compacting Memstore or Default Memstore	Major	.
HBASE-19051	Add new split algorithm for num string	Minor	.
HBASE-18824	Add meaningful comment to HConstants.LATEST_TIMESTAMP to explain why it is MAX_VALUE	Minor	.
HBASE-10367	RegionServer graceful stop / decommissioning	Major	.
HBASE-18986	Remove unnecessary null check after CellUtil.cloneQualifier()	Minor	.
HBASE-15410	Utilize the max seek value when all Filters in MUST_PASS_ALL FilterList return SEEK_NEXT_USING_HINT	Major	.
HBASE-18843	Add DistCp support to incremental backup with bulk loading	Major	.
HBASE-16010	Put draining function through Admin API	Minor	.
HBASE-18899	Make Fileinfo more readable in HFilePrettyPrinter	Major	HFile
HBASE-16894	Create more than 1 split per region, generalize HBASE-12590	Major	.
HBASE-18929	Hbase backup command doesn’t show debug option to enable backup in debug mode	Minor	.
HBASE-18814	Make ScanMetrics enabled and add counter <HBase Counters, ROWS_SCANNED> into the MapReduce Job over snapshot	Minor	mapreduce
HBASE-18559	Add histogram to MetricsConnection to track concurrent calls per server	Minor	Client
HBASE-18436	Add client-side hedged read metrics	Minor	.
HBASE-13844	Move static helper methods from KeyValue into CellUtils	Minor	.
HBASE-18884	Coprocessor Design Improvements follow up of HBASE-17732	Major	Coprocessors
HBASE-18652	Expose individual cache stats in a CombinedCache through JMX	Major	regionserver
HBASE-18651	Let ChaosMonkeyRunner expose the chaos monkey runner it creates	Major	.
HBASE-11462	MetaTableAccessor shouldn't use ZooKeeeper	Major	Client, Zookeeper
HBASE-18478	Allow users to remove RegionFinder from LoadBalancer calculations if no locality possible	Major	Balancer
HBASE-18849	expand "thirdparty" reference to give examples of setting netty location in common testing modules	Critical	documentation, thirdparty
HBASE-18609	Apply ClusterStatus#getClusterStatus(EnumSet<Option>) in code base	Major	.
HBASE-18795	Expose KeyValue.getBuffer() for tests alone	Major	.
HBASE-18772	[JDK8] Replace AtomicLong with LongAdder	Trivial	.
HBASE-14996	Some more API cleanup for 2.0	Blocker	.
HBASE-18683	Upgrade hbase to commons-math 3	Major	.
HBASE-13271	Table#puts(List<Put>) operation is indeterminate; needs fixing	Critical	API
HBASE-10240	Remove 0.94->0.96 migration code	Critical	.
HBASE-18662	The default values for many configuration items in the code are not consistent with hbase-default.xml	Minor	.
HBASE-18621	Refactor ClusterOptions before applying to code base	Major	.
HBASE-18778	Use Comparator for StealJobQueue	Major	Compaction
HBASE-18737	Display configured max size of memstore and cache on RS UI	Minor	.
HBASE-18674	upgrade hbase to commons-lang3	Major	.
HBASE-18746	Throw exception with job.getStatus().getFailureInfo() when ExportSnapshot fails	Minor	mapreduce, snapshots
HBASE-18740	Upgrade Zookeeper version to 3.4.10	Major	.
HBASE-18699	Copy LoadIncrementalHFiles to another package and mark the old one as deprecated	Major	mapreduce
HBASE-18675	Making {max,min}SessionTimeout configurable for MiniZooKeeperCluster	Minor	test, Zookeeper
HBASE-17826	Backup: submit M/R job to a particular Yarn queue	Major	.
HBASE-18677	typo in namespace docs	Trivial	documentation
HBASE-18701	Optimize reference guide to use cell acl conveniently	Trivial	.
HBASE-18519	Use builder pattern to create cell	Major	.
HBASE-18673	Some more unwanted reference to unshaded PB classes	Minor	.
HBASE-18224	Upgrade jetty	Critical	dependencies
HBASE-18532	Improve cache related stats rendered on RS UI	Major	regionserver, UI
HBASE-18629	Enhance ChaosMonkeyRunner with interruptibility	Major	.
HBASE-18631	Allow configuration of ChaosMonkey properties via hbase-site	Minor	integration tests
HBASE-18573	Update Append and Delete to use Mutation#getCellList(family)	Minor	.
HBASE-18251	Remove unnecessary traversing to the first and last keys in the CellSet	Major	.
HBASE-18581	Remove dead code and some tidy up in BaseLoadBalancer	Minor	Balancer
HBASE-18504	Add documentation for WAL compression	Minor	documentation
HBASE-17064	Add TaskMonitor#getTasks() variant which accepts type selection	Minor	.
HBASE-2631	Decide between "InMB" and "MB" as suffix for field names in ClusterStatus objects	Minor	.
HBASE-18533	Expose BucketCache values to be configured	Major	BucketCache
HBASE-18303	Clean up some parameterized test declarations	Minor	test
HBASE-18522	Add RowMutations support to Batch	Major	.
HBASE-18566	[RSGROUP]Log the client IP/port of the rsgroup admin	Major	rsgroup
HBASE-15511	ClusterStatus should be able to return responses by scope	Major	.
HBASE-18555	Remove redundant familyMap.put() from addxxx() of sub-classes of Mutation and Query	Minor	Client
HBASE-18387	[Thrift] Make principal configurable in DemoClient.java	Minor	.
HBASE-18548	Move sources of important Jenkins jobs into source control	Critical	documentation, scripts
HBASE-18248	Warn if monitored RPC task has been tied up beyond a configurable threshold	Major	.
HBASE-18485	Performance issue: ClientAsyncPrefetchScanner is slower than ClientSimpleScanner	Major	.
HBASE-18426	nightly job should use independent stages to check supported jdks	Critical	community, test
HBASE-14220	nightly tests should verify src tgz generates and builds correctly	Minor	build
HBASE-18520	Add jmx value to determine true Master Start time	Minor	metrics
HBASE-16893	Use Collection.removeIf instead of Iterator.remove in DependentColumnFilter	Minor	.
HBASE-16116	Remove redundant pattern *.iml	Trivial	.
HBASE-18261	[AMv2] Create new RecoverMetaProcedure and use it from ServerCrashProcedure and HMaster.finishActiveMasterInitialization()	Major	amv2
HBASE-18402	Thrift2 should support DeleteFamilyVersion type	Major	Thrift
HBASE-18434	Address some alerts raised by lgtm.com	Major	.
HBASE-18023	Log multi-* requests for more than threshold number of rows	Minor	regionserver
HBASE-15816	Provide client with ability to set priority on Operations	Major	.
HBASE-18389	Remove byte[] from formal parameter of sizeOf() of ClassSize, ClassSize.MemoryLayout and ClassSize.UnsafeLayout	Minor	util
HBASE-18412	[Shell] Support unset of list of configuration for a table	Minor	.
HBASE-16312	update jquery version	Critical	dependencies, UI
HBASE-18332	Upgrade asciidoctor-maven-plugin	Minor	website
HBASE-18339	Update test-patch to use hadoop 3.0.0-alpha4	Major	test
HBASE-18004	getRegionLocations needs to be called once in ScannerCallableWithReplicas#call()	Minor	Client
HBASE-18307	Share the same EventLoopGroup for NettyRpcServer, NettyRpcClient and AsyncFSWALProvider at RS side	Major	io, rpc, wal
HBASE-18083	Make large/small file clean thread number configurable in HFileCleaner	Major	.
HBASE-16730	Exclude junit as a transitive dependency from hadoop-common	Trivial	hbase
HBASE-15062	IntegrationTestMTTR conditionally run some tests	Minor	integration tests
HBASE-11707	Using Map instead of list in FailedServers of RpcClient	Minor	Client
HBASE-18286	Create static empty byte array to save memory	Trivial	community
HBASE-17995	improve log messages during snapshot related tests	Trivial	integration tests, mapreduce, snapshots, test
HBASE-15391	Avoid too large "deleted from META" info log	Minor	.
HBASE-16585	Rewrite the delegation token tests with Parameterized pattern	Major	security, test
HBASE-13197	Connection API cleanup	Major	API
HBASE-15756	Pluggable RpcServer	Critical	Performance, rpc
HBASE-17110	Improve SimpleLoadBalancer to always take server-level balance into account	Major	Balancer
HBASE-18022	Refine the error message issued with TableNotFoundException when expected table is not the same as the one fetched from meta	Minor	.
HBASE-18281	Performance update in StoreFileWriter.java for string replacement	Trivial	community
HBASE-18041	Add pylintrc file to HBase	Major	community
HBASE-18275	Formatting and grammar mistakes in schemadoc chapter	Trivial	documentation
HBASE-18164	Much faster locality cost function and candidate generator	Critical	Balancer
HBASE-16351	do dependency license check via enforcer plugin	Major	build, dependencies
HBASE-18252	Resolve BaseLoadBalancer bad practice warnings	Minor	.
HBASE-18033	Update supplemental models for new deps in Hadoop trunk	Critical	dependencies
HBASE-17959	Canary timeout should be configurable on a per-table basis	Minor	canary
HBASE-17777	TestMemstoreLAB#testLABThreading runs too long for a small test	Minor	test
HBASE-18101	Fix type mismatch on container access in QuotaCache#chore	Trivial	.
HBASE-18001	Extend the "count" shell command to support specified conditions	Minor	shell
HBASE-18094	Display the return value of the command append	Major	shell
HBASE-18075	Support namespaces and tables with non-latin alphabetical characters	Major	Client
HBASE-18067	Support a default converter for data read shell commands	Minor	shell
HBASE-18019	Close redundant memstore scanners	Major	.
HBASE-17910	Use separated StoreFileReader for streaming read	Major	regionserver, scan, Scanners
HBASE-18043	Institute a hard limit for individual cell size that cannot be overridden by clients	Major	IPC/RPC, regionserver
HBASE-17343	Make Compacting Memstore default in 2.0 with BASIC as the default type	Blocker	regionserver
HBASE-18021	Add more info in timed out RetriesExhaustedException for read replica client get processing,	Minor	Client
HBASE-18017	Reduce frequency of setStoragePolicy failure warnings	Minor	.
HBASE-14925	Develop HBase shell command/tool to list table's region info through command line	Major	shell
HBASE-17924	Consider sorting the row order when processing multi() ops before taking rowlocks	Major	.
HBASE-18015	Storage class aware block placement for procedure v2 WALs	Minor	.
HBASE-18007	Clean up rest module code	Trivial	.
HBASE-17990	Refactor TestFSUtils to use Before	Trivial	.
HBASE-16466	HBase snapshots support in VerifyReplication tool to reduce load on live HBase cluster with large tables	Major	hbase
HBASE-12870	"Major compaction triggered" and "Skipping major compaction" messages lack the region information	Major	Compaction
HBASE-17973	Create shell command to identify regions with poor locality	Major	shell
HBASE-17979	HBase Shell 'list' Command Help Doc Improvements	Minor	shell
HBASE-17875	Document why objects over 10MB are not well-suited for hbase	Major	documentation, mob
HBASE-8486	IS_ROOT isnt needed in HTableDescriptor.	Minor	.
HBASE-17817	Make Regionservers log which tables it removed coprocessors from when aborting	Major	Coprocessors, regionserver
HBASE-17835	Spelling mistakes in the Java source	Trivial	documentation
HBASE-17962	Improve documentation on Rest interface	Trivial	documentation, REST
HBASE-17877	Improve HBase's byte[] comparator	Major	util
HBASE-9899	for idempotent operation dups, return the result instead of throwing conflict exception	Major	.
HBASE-17514	Warn when Thrift Server 1 is configured for proxy users but not the HTTP transport	Minor	Thrift, Usability
HBASE-17944	Removed unused JDK version parsing from ClassSize.	Minor	build
HBASE-17912	Avoid major compactions on region server startup	Major	Compaction
HBASE-17888	Add generic methods for updating metrics on start and end of a procedure execution	Major	proc-v2
HBASE-16469	Several log refactoring/improvement suggestions	Major	Operability
HBASE-17836	CellUtil#estimatedSerializedSizeOf is slow when input is ByteBufferCell	Minor	.
HBASE-16969	RegionCoprocessorServiceExec should override the toString() for debugging	Minor	.
HBASE-17854	Use StealJobQueue in HFileCleaner after HBASE-17215	Major	.
HBASE-17215	Separate small/large file delete threads in HFileCleaner to accelerate archived hfile cleanup speed	Major	.
HBASE-17831	Support small scan in thrift2	Major	Thrift
HBASE-17623	Reuse the bytes array when building the hfile block	Major	HFile
HBASE-17815	Remove the unused field in PrefixTreeSeeker	Trivial	.
HBASE-17778	Remove the testing code in the AsyncRequestFutureImpl	Trivial	.
HBASE-15339	Improve DateTieredCompactionPolicy	Major	Compaction
HBASE-17747	Support both weak and soft object pool	Major	.
HBASE-15429	Add a split policy for busy regions	Major	regionserver
HBASE-17731	Fractional latency reporting in MultiThreadedAction	Trivial	.
HBASE-16977	VerifyReplication should log a printable representation of the row keys	Minor	Replication
HBASE-15941	HBCK repair should not unsplit healthy splitted region	Major	hbck
HBASE-17532	Replace explicit type with diamond operator	Trivial	build
HBASE-17734	Guard against possibly copying the qualifier in the ScanDeleteTracker	Minor	.
HBASE-17690	Clean up MOB code	Major	mob
HBASE-16188	Add EventCounter information to log4j properties file	Minor	.
HBASE-17689	Add support for table.existsAll in thrift2 THBaseservice	Major	Thrift
HBASE-17634	Clean up the usage of Result.isPartial	Major	scan
HBASE-17654	RSGroup code refactoring	Major	rsgroup
HBASE-17057	Minor compactions should also drop page cache behind reads	Major	Compaction
HBASE-17676	Get class name once for all in AbstractFSWAL	Major	Performance
HBASE-13718	Add a pretty printed table description to the table detail page of HBase's master	Minor	hbase
HBASE-17172	Optimize mob compaction with _del files	Major	mob
HBASE-17627	Active workers metric for thrift	Major	Thrift
HBASE-17637	Update progress more frequently in IntegrationTestBigLinkedList.Generator.persist	Minor	.
HBASE-17605	Refactor procedure framework code	Major	proc-v2
HBASE-17280	Add mechanism to control hbase cleaner behavior	Minor	Client, hbase, shell
HBASE-17613	avoid copy of family when initializing the FSWALEntry	Minor	.
HBASE-17437	Support specifying a WAL directory outside of the root directory	Major	Filesystem Integration, wal
HBASE-17592	Fix typo in IPCUtil and RpcConnection	Trivial	.
HBASE-17588	Remove unused imports brought in by HBASE-17437	Trivial	.
HBASE-17552	Update developer section in hbase book	Major	.
HBASE-17543	Create additional ReplicationEndpoint WALEntryFilters by configuration	Major	Replication
HBASE-17569	HBase-Procedure module need to support mvn clean test -PskipProcedureTests to skip unit test	Minor	proc-v2
HBASE-17555	Change calls to deprecated getHBaseAdmin to getAdmin	Minor	.
HBASE-17563	Foreach and switch in RootDocProcessor and StabilityOptions	Trivial	.
HBASE-17515	Reduce memory footprint of RegionLoads kept by StochasticLoadBalancer	Major	.
HBASE-17462	Use sliding window for read/write request costs in StochasticLoadBalancer	Major	.
HBASE-16698	Performance issue: handlers stuck waiting for CountDownLatch inside WALKey#getWriteEntry under high writing workload	Major	Performance
HBASE-17404	Replace explicit type with diamond operator in hbase-annotations	Trivial	.
HBASE-10699	Optimize some code; set capacity on arraylist when possible; use isEmpty; reduce allocations	Major	.
HBASE-17488	WALEdit should be lazily instantiated	Trivial	.
HBASE-17408	Introduce per request limit by number of mutations	Major	.
HBASE-17291	Remove ImmutableSegment#getKeyValueScanner	Major	Scanners
HBASE-17314	Limit total buffered size for all replication sources	Major	Replication
HBASE-17348	Remove the unused hbase.replication from javadoc/comment/book completely	Trivial	.
HBASE-15924	Enhance hbase services autorestart capability to hbase-daemon.sh	Major	.
HBASE-17292	Add observer notification before bulk loaded hfile is moved to region directory	Major	.
HBASE-17332	Replace HashMap to Array for DataBlockEncoding.idToEncoding	Major	.
HBASE-17331	Avoid busy waiting in ThrottledInputStream	Minor	.
HBASE-17318	Increment does not add new column if the increment amount is zero at first time writing	Major	.
HBASE-17298	remove unused code in HRegion#doMiniBatchMutation	Minor	regionserver
HBASE-17296	Provide per peer throttling for replication	Major	Replication
HBASE-17276	Reduce log spam from WrongRegionException in large multi()'s	Minor	regionserver
HBASE-17241	Avoid compacting already compacted mob files with _del files	Major	mob
HBASE-17207	Arrays.asList() with too few arguments	Trivial	.
HBASE-16700	Allow for coprocessor whitelisting	Minor	Coprocessors
HBASE-17239	Add UnsafeByteOperations#wrap(ByteInput, int offset, int len) API	Major	Protobufs
HBASE-17245	Replace HTableDescriptor#htd.getColumnFamilies().length with a low-cost implementation	Minor	.
HBASE-14882	Provide a Put API that adds the provided family, qualifier, value without copying	Major	.
HBASE-17243	Reuse CompactionPartitionId and avoid creating MobFileName in PartitionedMobCompactor to avoid unnecessary new objects	Minor	mob
HBASE-17194	Assign the new region to the idle server after splitting	Minor	.
HBASE-17232	Replace HashSet with ArrayList to accumulate delayed scanners in KVHeap and StoreScanner.	Major	.
HBASE-17161	MOB : Make ref cell creation more efficient	Major	.
HBASE-17235	Improvement in creation of CIS for onheap buffer cases	Major	rpc
HBASE-17191	Make use of UnsafeByteOperations#unsafeWrap(ByteBuffer buffer) in PBUtil#toCell(Cell cell)	Major	.
HBASE-17205	Add a metric for the duration of region in transition	Minor	Region Assignment
HBASE-17216	A Few Fields Can Be Safely Made Static	Major	.
HBASE-17212	Should add null checker on table name in HTable constructor and RegionServerCallable	Major	.
HBASE-17184	Code cleanup of LruBlockCache	Trivial	.
HBASE-17211	Add more details in log when UnknownScannerException thrown in ScannerCallable	Minor	Operability
HBASE-17178	Add region balance throttling	Major	Balancer
HBASE-16302	age of last shipped op and age of last applied op should be histograms	Major	Replication
HBASE-16561	Add metrics about read/write/scan queue length and active read/write/scan handler count	Minor	IPC/RPC, metrics
HBASE-17086	Add comments to explain why Cell#getTagsLength() returns an int, rather than a short	Minor	Interface
HBASE-17176	Reuse the builder in RequestConverter	Minor	.
HBASE-17157	Increase the default mergeable threshold for mob compaction	Major	mob
HBASE-17129	Remove public from methods in DataType interface	Minor	.
HBASE-17123	Add postBulkLoadHFile variant that notifies the final paths for the hfiles	Major	.
HBASE-17126	Expose KeyValue#checkParameters() and checkForTagsLength() to be used by other Cell implementations	Minor	Client, regionserver
HBASE-17088	Refactor RWQueueRpcExecutor/BalancedQueueRpcExecutor/RpcExecutor	Major	rpc
HBASE-16708	Expose endpoint Coprocessor name in "responseTooSlow" log messages	Major	.
HBASE-17037	Enhance LoadIncrementalHFiles API to convey loaded files	Major	.
HBASE-17077	Don't copy the replication queue belonging to the peer which has been deleted	Minor	.
HBASE-17047	Add an API to get HBase connection cache statistics	Minor	spark
HBASE-17063	Cleanup TestHRegion : remove duplicate variables for method name and two unused params in initRegion	Minor	.
HBASE-17026	VerifyReplication log should distinguish whether good row key is result of revalidation	Minor	.
HBASE-16840	Reuse cell's timestamp and type in ScanQueryMatcher	Minor	.
HBASE-17005	Improve log message in MobFileCache	Trivial	mob
HBASE-17004	Refactor IntegrationTestManyRegions to use @ClassRule for timing out	Minor	integration tests
HBASE-16946	Provide Raw scan as an option in VerifyReplication	Minor	hbase
HBASE-17013	Add constructor to RowMutations for initializing the capacity of internal list	Minor	.
HBASE-17006	Add names to threads for better debugability of thread dumps	Minor	Operability
HBASE-17014	Add clearly marked starting and shutdown log messages for all services.	Minor	Operability
HBASE-16950	Print raw stats in the end of procedure performance tools for parsing results from scripts	Trivial	.
HBASE-16783	Use ByteBufferPool for the header and message during Rpc response	Minor	.
HBASE-16562	ITBLL should fail to start if misconfigured	Major	integration tests
HBASE-16414	Improve performance for RPC encryption with Apache Common Crypto	Major	IPC/RPC
HBASE-16854	Refactor the org.apache.hadoop.hbase.client.Action	Minor	.
HBASE-16774	[shell] Add coverage to TestShell when ZooKeeper is not reachable	Major	shell, test
HBASE-16844	Procedure V2: DispatchMergingRegionsProcedure to use base class StateMachineProcedure for abort and rollback	Trivial	master, proc-v2
HBASE-16818	Avoid multiple copies of binary data during the conversion from Result to Row	Major	spark
HBASE-16821	Enhance LoadIncrementalHFiles API to convey missing hfiles if any	Major	.
HBASE-15921	Add first AsyncTable impl and create TableImpl based on it	Major	Client
HBASE-16792	Reuse KeyValue.KeyOnlyKeyValue in BufferedDataBlockEncoder.SeekerState	Minor	.
HBASE-16784	Make use of ExtendedCell#write(OutputStream os) for the default HFileWriter#append()	Major	.
HBASE-16809	Save one cell length calculation in HeapMemStoreLAB#copyCellInto	Minor	.
HBASE-16661	Add last major compaction age to per-region metrics	Minor	.
HBASE-16773	AccessController should access local region if possible	Major	.
HBASE-16657	Expose per-region last major compaction timestamp in RegionServer UI	Minor	regionserver, UI
HBASE-16772	Add verbose option to VerifyReplication for logging good rows	Minor	Replication, Usability
HBASE-16690	Move znode path configs to a separated class	Major	Zookeeper
HBASE-16672	Add option for bulk load to always copy hfile(s) instead of renaming	Major	.
HBASE-16720	Sort build ids in flaky dashboard	Minor	.
HBASE-16691	Optimize KeyOnlyFilter by utilizing KeyOnlyCell	Major	.
HBASE-16714	Procedure V2 - use base class to remove duplicate set up test code in table DDL procedures	Major	proc-v2, test
HBASE-16694	Reduce garbage for onDiskChecksum in HFileBlock	Minor	.
HBASE-16705	Eliminate long to Long auto boxing in LongComparator	Minor	Filters
HBASE-16692	Make ByteBufferUtils#equals safer and correct	Major	.
HBASE-16667	Building with JDK 8: ignoring option MaxPermSize=256m	Minor	build
HBASE-16423	Add re-compare option to VerifyReplication to avoid occasional inconsistent rows	Minor	Replication
HBASE-16680	Reduce garbage in BufferChain	Minor	.
HBASE-16659	Use CellUtil.createFirstOnRow instead of KeyValueUtil.createFirstOnRow in some places.	Minor	.
HBASE-16646	Enhance LoadIncrementalHFiles API to accept store file paths as input	Major	.
HBASE-16658	Optimize UTF8 string/byte conversions	Minor	.
HBASE-16640	TimeoutBlockingQueue#remove() should return whether the entry is removed	Minor	.
HBASE-15949	Cleanup TestRegionServerMetrics	Minor	.
HBASE-16381	Shell deleteall command should support row key prefixes	Minor	shell
HBASE-16616	Rpc handlers stuck on ThreadLocalMap.expungeStaleEntry	Major	Performance
HBASE-16086	TableCfWALEntryFilter and ScopeWALEntryFilter should not redundantly iterate over cells.	Major	.
HBASE-16541	Avoid unnecessary cell copy in Result#compareResults	Major	.
HBASE-16399	Provide an API to get list of failed regions and servername in Canary	Major	canary
HBASE-16502	Reduce garbage in BufferedDataBlockEncoder	Major	.
HBASE-16509	Add option to LoadIncrementalHFiles which allows skipping unmatched column families	Major	.
HBASE-16224	Reduce the number of RPCs for the large PUTs	Minor	Client
HBASE-16508	Move UnexpectedStateException to common	Trivial	.
HBASE-16486	Unify system table creation using the same createSystemTable API.	Minor	proc-v2
HBASE-16448	Custom metrics for custom replication endpoints	Major	Replication
HBASE-16450	Shell tool to dump replication queues	Major	Operability, Replication
HBASE-16455	Provide API for obtaining all the WAL files	Major	.
HBASE-16422	Tighten our guarantees on compatibility across patch versions	Major	documentation
HBASE-16434	Improve flaky dashboard	Minor	.
HBASE-16419	check REPLICATION_SCOPE's value more stringently	Major	.
HBASE-16385	Have hbase-rest pull hbase.rest.port from Constants.java	Minor	REST
HBASE-16379	[replication] Minor improvement to replication/copy_tables_desc.rb	Trivial	Replication, shell
HBASE-14345	Consolidate printUsage in IntegrationTestLoadAndVerify	Trivial	integration tests
HBASE-16299	Update REST API scanner with ability to do reverse scan	Minor	REST
HBASE-12770	Don't transfer all the queued hlogs of a dead server to the same alive server	Minor	Replication
HBASE-15882	Upgrade to yetus precommit 0.3.0	Critical	build
HBASE-8386	deprecate TableMapReduce.addDependencyJars(Configuration, class<?> ...)	Major	mapreduce
HBASE-16287	LruBlockCache size should not exceed acceptableSize too many	Major	BlockCache
HBASE-16225	Refactor ScanQueryMatcher	Major	regionserver, Scanners
HBASE-14881	Provide a Put API that uses the provided row without coping	Major	.
HBASE-16256	Purpose of EnvironmentEdge, EnvironmentEdgeManager	Trivial	documentation, regionserver
HBASE-16275	Change ServerManager#onlineServers from ConcurrentHashMap to ConcurrentSkipListMap	Minor	.
HBASE-14743	Add metrics around HeapMemoryManager	Minor	.
HBASE-16266	Do not throw ScannerTimeoutException when catch UnknownScannerException	Major	Client, Scanners
HBASE-16008	A robust way deal with early termination of HBCK	Major	hbck
HBASE-13701	Consolidate SecureBulkLoadEndpoint into HBase core as default for bulk load	Major	.
HBASE-16052	Improve HBaseFsck Scalability	Major	hbck
HBASE-16241	Allow specification of annotations to use when running check_compatibility.sh	Major	scripts
HBASE-16231	Integration tests should support client keytab login for secure clusters	Major	integration tests
HBASE-16220	Demote log level for "HRegionFileSystem - No StoreFiles for" messages to TRACE	Minor	.
HBASE-16087	Replication shouldn't start on a master if if only hosts system tables	Major	.
HBASE-14548	Expand how table coprocessor jar and dependency path can be specified	Major	Coprocessors
HBASE-16108	RowCounter should support multiple key ranges	Major	.
HBASE-16140	bump owasp.esapi from 2.1.0 to 2.1.0.1	Major	dependencies
HBASE-16114	Get regionLocation of required regions only for MR jobs	Minor	mapreduce
HBASE-16147	Shell command for getting compaction state	Major	shell
HBASE-16124	Make check_compatibility.sh less verbose when building HBase	Minor	build, test
HBASE-16149	Log the underlying RPC exception in RpcRetryingCallerImpl	Minor	.
HBASE-16130	Add comments to ProcedureStoreTracker	Minor	.
HBASE-16139	Use CellUtil instead of KeyValueUtil in Import	Minor	.
HBASE-14007	Writing to table through MR should fail upfront if table does not exist/is disabled	Minor	mapreduce
HBASE-16089	Add on FastPath for CoDel	Major	.
HBASE-15353	Add metric for number of CallQueueTooBigExceptions	Minor	IPC/RPC, metrics
HBASE-16085	Add on metric for failed compactions	Major	.
HBASE-15870	Specify columns in REST multi gets	Minor	REST
HBASE-14397	PrefixFilter doesn't filter all remaining rows if the prefix is longer than rowkey being compared	Minor	Filters
HBASE-16042	Add support in PE tool for InMemory Compaction	Major	.
HBASE-15600	Add provision for adding mutations to memstore or able to write to same region in batchMutate coprocessor hooks	Major	.
HBASE-16018	Better documentation of ReplicationPeers	Minor	.
HBASE-16048	Tag InternalScanner with LimitedPrivate(HBaseInterfaceAudience.COPROC)	Major	.
HBASE-5291	Add Kerberos HTTP SPNEGO authentication support to HBase web consoles	Major	master, regionserver, security
HBASE-16033	Add more details in logging of responseTooSlow/TooLarge	Major	Operability
HBASE-16026	Master UI should display status of additional ZK switches	Major	.
HBASE-16004	Update to Netty 4.1.1	Major	.
HBASE-15981	Stripe and Date-tiered compactions inaccurately suggest disabling table in docs	Minor	documentation
HBASE-15849	Shell Cleanup: Simplify handling of commands' runtime	Minor	.
HBASE-15931	Add log for long-running tasks in AsyncProcess	Critical	Operability
HBASE-15727	Canary Tool for Zookeeper	Major	.
HBASE-15910	Update hbase ref guide to explain submit-patch.py	Major	documentation
HBASE-15890	Allow thrift to set/unset "cacheBlocks" for Scans	Major	Thrift
HBASE-15854	Log the cause of SASL connection failures	Minor	security
HBASE-15837	Memstore size accounting is wrong if postBatchMutate() throws exception	Major	regionserver
HBASE-15471	Add num calls in priority and general queue to RS UI	Major	UI
HBASE-15802	ConnectionUtils should use ThreadLocalRandom instead of Random	Minor	.
HBASE-15529	Override needBalance in StochasticLoadBalancer	Minor	.
HBASE-15864	Reuse the testing helper to wait regions in transition	Trivial	test
HBASE-15843	Replace RegionState.getRegionInTransition() Map with a Set	Trivial	master, Region Assignment
HBASE-15593	Time limit of scanning should be offered by client	Major	.
HBASE-15667	Add more clarity to Reference Guide related to importing Eclipse Formatter	Trivial	documentation
HBASE-15842	SnapshotInfo should display ownership information	Major	.
HBASE-13532	Make UnknownScannerException logging less scary	Trivial	.
HBASE-15808	Reduce potential bulk load intermediate space usage and waste	Minor	.
HBASE-15415	Improve Master WebUI snapshot information	Minor	master, snapshots
HBASE-15609	Remove PB references from Result, DoubleColumnInterpreter and any such public facing class for 2.0	Blocker	.
HBASE-15791	Improve javadoc in ScheduledChore	Minor	master
HBASE-15793	Port over AsyncCall improvements	Major	rpc
HBASE-15794	Fix Findbugs instanceof always true issue in MultiServerCallable	Minor	.
HBASE-15795	Cleanup all classes in package org.apache.hadoop.hbase.ipc for code style	Minor	.
HBASE-15745	Refactor RPC classes to better accept async changes.	Major	.
HBASE-15773	CellCounter improvements	Major	mapreduce
HBASE-15759	RegionObserver.preStoreScannerOpen() doesn't have acces to current readpoint	Minor	Coprocessors
HBASE-15608	Remove PB references from SnapShot related Exceptions	Blocker	.
HBASE-15767	Upgrade httpclient dependency	Major	build, dependencies
HBASE-15768	fix capitalization of ZooKeeper usage	Trivial	documentation
HBASE-15720	Print row locks at the debug dump page	Major	.
HBASE-15744	Port over small format/text improvements from HBASE-13784	Trivial	.
HBASE-15551	Make call queue too big exception use servername	Minor	.
HBASE-15706	HFilePrettyPrinter should print out nicely formatted tags	Minor	HFile
HBASE-15686	Add override mechanism for the exempt classes when dynamically loading table coprocessor	Major	Coprocessors
HBASE-15680	Examples in shell help message for TIMERANGE scanner specifications should use milliseconds instead of seconds	Trivial	shell
HBASE-15688	Use MasterServices directly instead of casting to HMaster when possible	Trivial	master
HBASE-15641	Shell "alter" should do a single modifyTable operation	Major	shell
HBASE-15614	Report metrics from JvmPauseMonitor	Major	metrics, regionserver
HBASE-13129	Add troubleshooting hints around WAL retention from replication	Major	documentation, Replication
HBASE-15632	Undo the checking of lastStoreFlushTimeMap.isEmpty() introduced in HBASE-13145	Minor	regionserver
HBASE-14985	TimeRange constructors should set allTime when appropriate	Minor	.
HBASE-15605	Remove PB references from HCD and HTD for 2.0	Blocker	.
HBASE-15507	Online modification of enabled ReplicationPeerConfig	Major	Replication
HBASE-15612	Minor improvements to CellCounter and RowCounter documentation	Trivial	documentation, mapreduce
HBASE-15586	Unify human readable numbers in the web UI	Major	.
HBASE-15606	Limit creating zk connection in HBaseAdmin#getCompactionState() only to case when 'hbase:meta' is checked.	Minor	Admin
HBASE-15396	Enhance mapreduce.TableSplit to add encoded region name	Minor	mapreduce
HBASE-15571	Make MasterProcedureManagerHost accessible through MasterServices	Major	.
HBASE-15569	Make Bytes.toStringBinary faster	Minor	Performance
HBASE-14983	Create metrics for per block type hit/miss ratios	Major	metrics
HBASE-15191	CopyTable and VerifyReplication - Option to specify batch size, versions	Minor	Replication
HBASE-15508	Add command for exporting snapshot in hbase command script	Minor	hbase, scripts, snapshots
HBASE-15496	Throw RowTooBigException only for user scan/get	Minor	Scanners
HBASE-15526	Make SnapshotManager accessible through MasterServices	Major	.
HBASE-15486	Avoid multiple disable/enable balancer calls while running rolling-restart.sh --graceful	Minor	scripts
HBASE-15300	Upgrade to zookeeper 3.4.8	Minor	.
HBASE-14703	HTable.mutateRow does not collect stats	Major	Client
HBASE-15475	Allow TimestampsFilter to provide a seek hint	Major	Client, Filters, regionserver
HBASE-15212	RPCServer should enforce max request size	Major	.
HBASE-15447	Improve javadocs description for Delete methods	Minor	API, documentation
HBASE-15478	add comments to FSHLog explaining why syncRunnerIndex won't overflow	Minor	wal
HBASE-14963	Remove use of Guava Stopwatch from HBase client code	Major	Client
HBASE-15451	Remove unnecessary wait in MVCC	Major	.
HBASE-15456	CreateTableProcedure/ModifyTableProcedure needs to fail when there is no family in table descriptor	Minor	master
HBASE-12940	Expose listPeerConfigs and getPeerConfig to the HBase shell	Major	shell
HBASE-15470	Add a setting for Priority queue length	Major	IPC/RPC, Region Assignment
HBASE-15413	Procedure-V2: print out ProcedureInfo during trace	Trivial	proc-v2
HBASE-15243	Utilize the lowest seek value when all Filters in MUST_PASS_ONE FilterList return SEEK_NEXT_USING_HINT	Major	.
HBASE-15338	Add a option to disable the data block cache for testing the performance of underlying file system	Minor	integration tests
HBASE-15356	Remove unused Imports	Trivial	.
HBASE-14099	StoreFile.passesKeyRangeFilter need not create Cells from the Scan's start and stop Row	Major	Performance, Scanners
HBASE-15315	Remove always set super user call as high priority	Major	.
HBASE-15222	Use less contended classes for metrics	Critical	metrics
HBASE-15312	Update the dependences of pom for mini cluster in HBase Book	Minor	documentation
HBASE-15306	Make RPC call queue length dynamically configurable	Major	IPC/RPC
HBASE-11927	Use Native Hadoop Library for HFile checksum (And flip default from CRC32 to CRC32C)	Major	Performance
HBASE-15301	Remove the never-thrown NamingException from TableInputFormatBase#reverseDNS method signature	Minor	.
HBASE-15219	Canary tool does not return non-zero exit code when one of regions is in stuck state	Critical	canary
HBASE-15223	Make convertScanToString public for Spark	Major	.
HBASE-15229	Canary Tools should not call System.Exit on error	Critical	canary
HBASE-11792	Organize PerformanceEvaluation usage output	Minor	Performance, test
HBASE-15201	Add hbase-spark to hbase assembly	Minor	.
HBASE-15211	Don't run the CatalogJanitor if there are regions in transition	Major	master
HBASE-15197	Expose filtered read requests metric to metrics framework and Web UI	Minor	.
HBASE-15177	Reduce garbage created under high load	Major	.
HBASE-13376	Improvements to Stochastic load balancer	Minor	Balancer
HBASE-15129	Set default value for hbase.fs.tmp.dir rather than fully depend on hbase-default.xml	Major	mapreduce
HBASE-14969	Add throughput controller for flush	Major	regionserver
HBASE-15123	Remove duplicate code in LocalHBaseCluster and minor formatting	Minor	.
HBASE-14865	Support passing multiple QOPs to SaslClient/Server via hbase.rpc.protection	Major	security
HBASE-15119	Include git SHA in check_compatibility reports	Minor	build
HBASE-13525	Update test-patch to leverage Apache Yetus	Major	build
HBASE-15076	Add getScanner(Scan scan, List<KeyValueScanner> additionalScanners) API into Region interface	Critical	regionserver
HBASE-15068	Add metrics for region normalization plans	Major	.
HBASE-14468	Compaction improvements: FIFO compaction policy	Major	Compaction, Performance
HBASE-15066	Small improvements to Canary tool	Major	.
HBASE-14524	Short-circuit comparison of rows in CellComparator	Major	Performance, Scanners
HBASE-15038	ExportSnapshot should support separate configurations for source and destination clusters	Major	mapreduce, snapshots
HBASE-15060	Cull TestHFileWriterV2 and HFileWriterFactory	Major	HFile
HBASE-15044	Region normalization should be allowed when underlying namespace has quota	Major	Balancer
HBASE-14796	Enhance the Gets in the connector	Minor	.
HBASE-13322	Replace explicit HBaseAdmin creation with connection#getAdmin()	Minor	.
HBASE-14800	Expose checkAndMutate via Thrift2	Major	Thrift
HBASE-14684	Try to remove all MiniMapReduceCluster in unit tests	Critical	test
HBASE-13158	When client supports CellBlock, return the result Cells as controller payload for get(Get) API also	Major	.
HBASE-14976	Add RPC call queues to the web ui	Minor	UI
HBASE-15005	Use value array in computing block length for 1.2 and 1.3	Major	regionserver
HBASE-14978	Don't allow Multi to retain too many blocks	Blocker	io, IPC/RPC, regionserver
HBASE-14780	Integration Tests that run with ChaosMonkey need to specify CFs	Major	integration tests
HBASE-14951	Make hbase.regionserver.maxlogs obsolete	Minor	Performance, wal
HBASE-14984	Allow memcached block cache to set optimze to false	Major	BlockCache
HBASE-13425	Documentation nit in REST Gateway impersonation section	Minor	documentation
HBASE-14795	Enhance the spark-hbase scan operations	Minor	.
HBASE-14946	Don't allow multi's to over run the max result size.	Critical	Client, IPC/RPC
HBASE-14906	Improvements on FlushLargeStoresPolicy	Major	.
HBASE-14866	VerifyReplication should use peer configuration in peer connection	Major	Replication
HBASE-7171	Initial web UI for region/memstore/storefiles details	Major	UI
HBASE-14719	Add metric for number of MasterProcWALs	Major	.
HBASE-14580	Make the HBaseMiniCluster compliant with Kerberos	Major	security, test
HBASE-14749	Make changes to region_mover.rb to use RegionMover Java tool	Major	.
HBASE-14891	Add log for uncaught exception in RegionServerMetricsWrapperRunnable	Minor	metrics
HBASE-14859	Better checkstyle reporting	Minor	.
HBASE-14826	Small improvement in KVHeap seek() API	Minor	.
HBASE-14860	Improve BoundedByteBufferPool; make lockless	Minor	.
HBASE-14871	Allow specifying the base branch for make_patch	Major	.
HBASE-14821	CopyTable should allow overriding more config properties for peer cluster	Major	mapreduce
HBASE-13347	Deprecate FirstKeyValueMatchingQualifiersFilter	Minor	.
HBASE-14862	Add support for reporting p90 for histogram metrics	Minor	metrics
HBASE-14172	Upgrade existing thrift binding using thrift 0.9.3 compiler.	Minor	.
HBASE-14829	Add more checkstyles	Major	.
HBASE-14805	status should show the master in shell	Major	shell
HBASE-14708	Use copy on write Map for region location cache	Critical	Client
HBASE-14766	In WALEntryFilter, cell.getFamily() needs to be replaced with the new low-cost implementation	Major	.
HBASE-14387	Compaction improvements: Maximum off-peak compaction size	Major	Compaction, Performance
HBASE-14693	Add client-side metrics for received pushback signals	Major	Client, metrics
HBASE-14765	Remove snappy profile	Major	build
HBASE-14752	Add example of using the HBase client in a multi-threaded environment	Minor	Client
HBASE-14666	Remove deprecated HBaseTestingUtility#deleteTable methods	Major	test
HBASE-12986	Compaction pressure based client pushback	Major	.
HBASE-12822	Option for Unloading regions through region_mover.rb without Acknowledging	Minor	.
HBASE-13742	buildbot should run link checker over book	Major	documentation
HBASE-14700	Support a "permissive" mode for secure clusters to allow "simple" auth clients	Major	security
HBASE-14715	Add javadocs to DelegatingRetryingCallable	Trivial	Client
HBASE-13014	Java Tool For Region Moving	Major	.
HBASE-14731	Add -DuseMob option to ITBLL	Major	.
HBASE-14687	Un-synchronize BufferedMutator	Critical	Client, Performance
HBASE-14721	Memstore add cells - Avoid many garbage	Major	regionserver
HBASE-14714	some cleanup to snapshot code	Trivial	snapshots
HBASE-14675	Exorcise deprecated Put#add(...) and replace with Put#addColumn(...)	Major	.
HBASE-14672	Exorcise deprecated Delete#delete* apis	Major	.
HBASE-12769	Replication fails to delete all corresponding zk nodes when peer is removed	Minor	Replication
HBASE-14696	Support setting allowPartialResults in mapreduce Mappers	Major	mapreduce
HBASE-14266	RegionServers have a lock contention of Configuration.getProps	Critical	regionserver
HBASE-14683	Batching in buffered mutator is awful when adding lists of mutations.	Major	Client
HBASE-14670	Remove deprecated HBaseTestCase from TestBlocksRead	Major	test
HBASE-14669	remove unused import and fix javadoc	Trivial	.
HBASE-14671	Remove deprecated HBaseTestCase/Put/Delete apis from TestGetClosestAtOrBefore	Major	test
HBASE-14665	Remove deprecated HBaseTestingUtility#createTable methods	Major	test
HBASE-14668	Remove deprecated HBaseTestCase dependency from TestHFile	Major	test
HBASE-14643	Avoid Splits from once again opening a closed reader for fetching the first and last key	Major	regionserver
HBASE-14586	Use a maven profile to run Jacoco analysis	Minor	pom
HBASE-14268	Improve KeyLocker	Minor	util
HBASE-14588	Stop accessing test resources from within src folder	Major	build, test
HBASE-14587	Attach a test-sources.jar for hbase-server	Major	build
HBASE-14582	Regionserver status webpage bucketcache list can become huge	Major	regionserver
HBASE-14517	Show regionserver's version in master status page	Minor	monitoring
HBASE-14565	Make ZK connection timeout configurable in MiniZooKeeperCluster	Major	.
HBASE-14574	TableOutputFormat#getRecordWriter javadoc misleads	Major	.
HBASE-14573	Edit on the ByteBufferedCell javadoc	Major	documentation
HBASE-14436	HTableDescriptor#addCoprocessor will always make RegionCoprocessorHost create new Configuration	Minor	Coprocessors
HBASE-14520	Optimize the number of calls for tags creation in bulk load	Major	.
HBASE-14547	Add more debug/trace to zk-procedure	Trivial	snapshots
HBASE-14230	replace reflection in FSHlog with HdfsDataOutputStream#getCurrentBlockReplication()	Minor	wal
HBASE-14478	A ThreadPoolExecutor with a LinkedBlockingQueue cannot execute tasks concurrently	Major	regionserver
HBASE-14455	Try to get rid of unused HConnection instance	Minor	.
HBASE-14193	Remove support for direct upgrade from pre-0.96 versions	Minor	.
HBASE-14461	Cleanup IncreasingToUpperBoundRegionSplitPolicy	Minor	.
HBASE-14448	Refine RegionGroupingProvider Phase-2: remove provider nesting and formalize wal group name	Major	.
HBASE-14082	Add replica id to JMX metrics names	Major	metrics
HBASE-14334	Move Memcached block cache in to it's own optional module.	Major	BlockCache, build, Operability
HBASE-14306	Refine RegionGroupingProvider: fix issues and make it more scalable	Major	wal
HBASE-6617	ReplicationSourceManager should be able to track multiple WAL paths	Major	Replication
HBASE-14314	Metrics for block cache should take region replicas into account	Major	metrics, regionserver
HBASE-12988	[Replication]Parallel apply edits across regions	Major	Replication
HBASE-14261	Enhance Chaos Monkey framework by adding zookeeper and datanode fault injections.	Major	integration tests
HBASE-7972	Add a configuration for the TCP backlog in the Thrift server	Major	Thrift
HBASE-14332	Show the table state when we encounter exception while disabling / enabling table	Minor	.
HBASE-14325	Add snapshotinfo command to hbase script	Minor	scripts
HBASE-14309	Allow load balancer to operate when there is region in transition by adding force flag	Major	.
HBASE-14078	improve error message when HMaster can't bind to port	Major	master
HBASE-13127	Add timeouts on all tests so less zombie sightings	Major	test
HBASE-13996	Add write sniffing in canary	Major	canary
HBASE-14260	don't build javadocs for hbase-protocol module	Major	build, documentation
HBASE-14148	Web UI Framable Page	Major	security, UI
HBASE-14165	The initial size of RWQueueRpcExecutor.queues should be (numWriteQueues + numReadQueues + numScanQueues)	Minor	IPC/RPC
HBASE-14203	remove duplicate code getTableDescriptor in HTable	Trivial	.
HBASE-13914	Minor improvements to dev-support/publish_hbase_website.sh	Minor	website
HBASE-12812	Update Netty dependency to latest release	Major	.
HBASE-13985	Add configuration to skip validating HFile format when bulk loading	Minor	.
HBASE-14122	Client API for determining if server side supports cell level security	Minor	.
HBASE-14194	Undeprecate methods in ThriftServerRunner.HBaseHandler	Trivial	.
HBASE-12256	Update patch submission guidelines to call out binary file support	Minor	documentation
HBASE-13965	Stochastic Load Balancer JMX Metrics	Major	Balancer, metrics
HBASE-14164	Display primary region replicas distribution on table.jsp	Minor	.
HBASE-14097	Log link to client scan troubleshooting section when scanner exceptions happen.	Trivial	.
HBASE-14152	Fix the warnings in Checkstyle and FindBugs brought in by merging hbase-11339	Major	mob
HBASE-14151	Remove the unnecessary file ProtobufUtil.java.rej which is brought in by merging hbase-11339	Major	mob
HBASE-14058	Stabilizing default heap memory tuner	Major	regionserver
HBASE-14110	Add CostFunction for balancing primary region replicas	Major	Balancer
HBASE-8642	[Snapshot] List and delete snapshot by table	Major	snapshots
HBASE-14045	Bumping thrift version to 0.9.2.	Major	.
HBASE-12596	bulkload needs to follow locality	Major	HFile, regionserver
HBASE-13927	Allow hbase-daemon.sh to conditionally redirect the log or not	Major	shell
HBASE-14002	Add --noReplicationSetup option to IntegrationTestReplication	Major	integration tests
HBASE-13925	Use zookeeper multi to clear znodes in ZKProcedureUtil	Major	Zookeeper
HBASE-13500	Deprecate KVComparator and move to CellComparator	Major	.
HBASE-14015	Allow setting a richer state value when toString a pv2	Minor	proc-v2
HBASE-13980	Distinguish blockedFlushCount vs unblockedFlushCount when tuning heap memory	Minor	.
HBASE-13670	[HBase MOB] ExpiredMobFileCleaner tool deletes mob files later for one more day after they are expired	Major	documentation, mob
HBASE-13943	Get rid of KeyValue#heapSizeWithoutTags	Major	.
HBASE-14001	Optimize write(OutputStream out, boolean withTags) for SizeCachedNoTagsKeyValue	Minor	.
HBASE-13103	[ergonomics] add region size balancing as a feature of master	Major	Balancer, Usability
HBASE-13900	duplicate methods between ProtobufMagic and ProtobufUtil	Minor	.
HBASE-13931	Move Unsafe based operations to UnsafeAccess	Major	.
HBASE-13917	Remove string comparison to identify request priority	Minor	regionserver
HBASE-13876	Improving performance of HeapMemoryManager	Minor	hbase, regionserver
HBASE-13247	Change BufferedMutatorExample to use addColumn() since add() is deprecated	Trivial	Client
HBASE-13894	Avoid visitor alloc each call of ByteBufferArray get/putMultiple()	Minor	regionserver
HBASE-13829	Add more ThrottleType	Major	Client
HBASE-13755	Provide single super user check implementation	Major	security
HBASE-13848	Access InfoServer SSL passwords through Credential Provder API	Major	security
HBASE-13828	Add group permissions testing coverage to AC.	Major	test
HBASE-13846	Run MiniCluster on top of other MiniDfsCluster	Minor	test
HBASE-13816	Build shaded modules only in release profile	Major	build
HBASE-13344	Add enforcer rule that matches our JDK support statement	Minor	build
HBASE-13761	Optimize FuzzyRowFilter	Minor	Filters
HBASE-13710	Remove use of Hadoop's ReflectionUtil in favor of our own.	Minor	.
HBASE-13780	Default to 700 for HDFS root dir permissions for secure deployments	Major	Operability, security
HBASE-13671	More classes to add to the invoking repository of org.apache.hadoop.hbase.mapreduce.driver	Major	mapreduce
HBASE-13745	Say why a flush was requested in log message	Minor	Operability
HBASE-13645	Rename *column methods in MasterObserver to *columnFamily	Minor	.
HBASE-13725	[documentation] Pseudo-Distributed Local Install can link to hadoop instructions	Minor	.
HBASE-13656	Rename getDeadServers to getDeadServersSize in Admin	Minor	.
HBASE-13675	ProcedureExecutor completion report should be at DEBUG log level	Minor	.
HBASE-13673	WALProcedureStore procedure is chatty	Minor	.
HBASE-13677	RecoverableZookeeper WARNs on expected events	Minor	.
HBASE-13684	Allow mlockagent to be used when not starting as root	Minor	.
HBASE-13655	Deprecate duplicate getCompression methods in HColumnDescriptor	Minor	.
HBASE-13251	Correct 'HBase, MapReduce, and the CLASSPATH' section in HBase Ref Guide	Major	documentation
HBASE-13598	Make hbase assembly 'attach' to the project	Minor	.
HBASE-12415	Add add(byte[][] arrays) to Bytes.	Major	API, Client
HBASE-13358	Upgrade VisibilityClient API to accept Connection object.	Minor	API, security
HBASE-13420	RegionEnvironment.offerExecutionLatency Blocks Threads under Heavy Load	Major	Coprocessors, metrics, Performance
HBASE-13351	Annotate internal MasterRpcServices methods with admin priority	Major	master
HBASE-13431	Allow to skip store file range check based on column family while creating reference files in HRegionFileSystem#splitStoreFile	Major	.
HBASE-13578	Remove Arrays.asList().subList() from FSHLog.offer()	Trivial	wal
HBASE-13518	Typo in hbase.hconnection.meta.lookup.threads.core parameter	Major	.
HBASE-13516	Increase PermSize to 128MB	Major	.
HBASE-13255	Bad grammar in RegionServer status page	Trivial	monitoring
HBASE-13334	FindBugs should create precise report for new bugs introduced	Minor	build
HBASE-13550	[Shell] Support unset of a list of table attributes	Minor	.
HBASE-13552	ChoreService shutdown message could be more informative	Trivial	.
HBASE-13534	Change HBase master WebUI to explicitly mention if it is a backup master	Minor	master, UI
HBASE-13456	Improve HFilePrettyPrinter first hbase:meta region processing	Minor	util
HBASE-12987	HBCK should print status while scanning over many regions	Major	hbck, Usability
HBASE-13350	Add a debug-warn if we fail HTD checks even if table.sanity.checks is false	Trivial	master, Operability
HBASE-13453	Master should not bind to region server ports	Critical	.
HBASE-13419	Thrift gateway should propagate text from exception causes.	Major	Thrift
HBASE-13436	Include user name in ADE for scans	Minor	.
HBASE-13381	Expand TestSizeFailures to include small scans	Minor	test
HBASE-13270	Setter for Result#getStats is #addResults; confusing!	Major	Client
HBASE-13362	Set max result size from client only (like scanner caching).	Major	.
HBASE-11864	Enhance HLogPrettyPrinter to print information from WAL Header	Minor	.
HBASE-13370	PE tool could give option for using Explicit Column Tracker which leads to seeks	Major	.
HBASE-6919	Remove unnecessary throws IOException from Bytes.readVLong	Minor	.
HBASE-12891	Parallel execution for Hbck checkRegionConsistency	Major	hbck
HBASE-13341	Add option to disable filtering on interface annotations for the API compatibility report	Minor	.
HBASE-13340	Include LimitedPrivate interfaces in the API compatibility report	Minor	API
HBASE-13366	Throw DoNotRetryIOException instead of read only IOException	Minor	.
HBASE-13345	Fix LocalHBaseCluster so that different region server impl can be used for different slaves	Minor	.
HBASE-13348	Separate the thread number configs for meta server and server operations	Minor	master
HBASE-12975	Supportable SplitTransaction and RegionMergeTransaction interfaces	Major	.
HBASE-13369	Expose scanNext stats to region server level	Major	.
HBASE-13222	Provide means of non-destructive balancer inspection	Minor	Balancer
HBASE-13316	Reduce the downtime on planned moves of regions	Minor	Balancer
HBASE-13342	Fix incorrect interface annotations	Major	.
HBASE-13199	Some small improvements on canary tool	Major	.
HBASE-13286	Minimum timeout for a rpc call could be 1 ms instead of 2 seconds	Minor	Client
HBASE-13241	Add tests for group level grants	Critical	security, test
HBASE-13235	Revisit the security auditing semantics.	Major	.
HBASE-13216	Add version info in RPC connection header	Minor	Client, IPC/RPC
HBASE-13109	Make better SEEK vs SKIP decisions during scanning	Major	.
HBASE-13256	HBaseConfiguration#checkDefaultsVersion(Configuration) has spelling error	Trivial	Client
HBASE-13223	Add testMoveMeta to IntegrationTestMTTR	Major	integration tests
HBASE-13240	add an exemption to test-patch for build-only changes.	Minor	build
HBASE-13236	Clean up m2e-related warnings/errors from poms	Minor	build
HBASE-13162	Add capability for cleaning hbase acls to hbase cleanup script.	Minor	.
HBASE-12405	WAL accounting by Store	Major	wal
HBASE-13185	Document hbase.regionserver.thrift.framed.max_frame_size_in_mb more clearly	Trivial	documentation
HBASE-13183	Make ZK tickTime configurable in standalone HBase	Minor	master
HBASE-12706	Support multiple port numbers in ZK quorum string	Critical	.
HBASE-13142	[PERF] Reuse the IPCUtil#buildCellBlock buffer	Major	Performance
HBASE-13122	Improve efficiency for return codes of some filters	Major	Filters
HBASE-13128	Make HBCK's lock file retry creation and deletion	Minor	hbck
HBASE-13100	Shell command to retrieve table splits	Minor	shell
HBASE-13132	Improve RemoveColumn action debug message	Trivial	integration tests
HBASE-13138	Clean up TestMasterObserver (debug, trying to figure why fails)	Major	test
HBASE-13120	Allow disabling hadoop classpath and native library lookup	Major	hbase
HBASE-13086	Show ZK root node on Master WebUI	Minor	master
HBASE-13080	Hbase shell message containing extra quote at the end of error message.	Trivial	.
HBASE-13054	Provide more tracing information for locking/latching events.	Major	.
HBASE-13056	Refactor table.jsp code to remove repeated code and make it easier to add new checks	Major	.
HBASE-13002	Make encryption cipher configurable	Major	.
HBASE-13059	Set executable bit for scripts in dev-support	Trivial	scripts
HBASE-13044	Configuration option for disabling coprocessor loading	Minor	.
HBASE-13018	WALSplitter should not try to get table states while splitting META	Critical	.
HBASE-13016	Clean up remnants of table states stored in table descriptors	Major	.
HBASE-12035	Keep table state in META	Critical	Client, master
HBASE-12982	Adding timeouts to TestChoreService	Major	.
HBASE-12957	region_mover#isSuccessfulScan may be extremely slow on region with lots of expired data	Minor	scripts
HBASE-8329	Limit compaction speed	Major	Compaction
HBASE-12808	Use Java API Compliance Checker for binary/source compatibility	Major	test
HBASE-12627	Add back snapshot batching facility from HBASE-11360 dropped by HBASE-11742	Major	master, scaling
HBASE-12896	checkstyle report diff tool	Minor	build
HBASE-12887	Cleanup many checkstyle errors in o.a.h.h.client	Minor	build, Client
HBASE-12840	Improve unit test coverage of the client pushback mechanism	Major	.
HBASE-12620	Add HBASE-11639 related items to Ref Guide	Major	documentation
HBASE-7541	Convert all tests that use HBaseTestingUtility.createMultiRegions to HBA.createTable	Major	.
HBASE-11144	Filter to support scanning multiple row key ranges	Major	Filters
HBASE-12839	Remove synchronization in ServerStatisticsTracker	Minor	.
HBASE-12796	Clean up HTable and HBaseAdmin deprecated constructor usage	Major	.
HBASE-12761	On region jump ClientScanners should get next row start key instead of a skip.	Major	.
HBASE-11869	Support snapshot owner	Minor	.
HBASE-12429	Add port to ClusterManager's actions.	Major	integration tests
HBASE-12590	A solution for data skew in HBase-Mapreduce Job	Major	mapreduce
HBASE-12223	MultiTableInputFormatBase.getSplits is too slow	Minor	Client
HBASE-10201	Port 'Make flush decisions per column family' to trunk	Major	wal
HBASE-12601	Explain how to grant/revoke permission to a group/namespace in grant/revoke command usage	Minor	documentation, security, shell
HBASE-12650	Move ServerName to hbase-common module	Blocker	.
HBASE-12559	Provide LoadBalancer with online configuration capability	Major	.
HBASE-11939	Document compressed blockcache	Major	documentation
HBASE-12207	A script to help keep your Git repo fresh	Major	documentation, scripts
HBASE-12251	[book] Hadoop compat matrix 0.94 section needs cleaned up	Major	documentation
HBASE-12220	Add hedgedReads and hedgedReadWins metrics	Major	.
HBASE-12195	Fix dev-support/findHangingTests	Minor	test
HBASE-12003	Fix SecureBulkLoadEndpoint class javadoc formatting	Trivial	documentation, security
HBASE-6290	Add a function a mark a server as dead and start the recovery the process	Minor	monitoring
HBASE-11862	Get rid of Writables in HTableDescriptor, HColumnDescriptor	Minor	.
HBASE-11760	Tighten up region state transition	Major	Region Assignment
HBASE-11611	Clean up ZK-based region assignment	Major	Region Assignment
HBASE-11585	PE: Allows warm-up	Trivial	test
HBASE-3135	Make our MR jobs implement Tool and use ToolRunner so can do -D trickery, etc.	Major	.
HBASE-11548	[PE] Add 'cycling' test N times and unit tests for size/zipf/valueSize calculations	Trivial	test
HBASE-11400	Edit, consolidate, and update Compression and data encoding docs	Minor	documentation
HBASE-5696	Use Hadoop's DataOutputOutputStream instead of have a copy local	Major	.
HBASE-11344	Hide row keys and such from the web UIs	Major	.
HBASE-6580	Deprecate HTablePool in favor of HConnection.getTable(...)	Major	.

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-19924	hbase rpc throttling does not work for multi() with request count rater.	Major	rpc
HBASE-20293	get_splits returns duplicate split points when region replication is on	Minor	shell
HBASE-20464	Disable IMC	Major	in-memory-compaction
HBASE-20442	clean up incorrect use of commons-collections 3	Major	dependencies, thirdparty
HBASE-20440	Clean up incorrect use of commons-lang 2.y	Major	dependencies
HBASE-20439	Clean up incorrect use of commons-logging in hbase-server	Minor	dependencies, logging
HBASE-20398	Redirect doesn't work on web UI	Major	UI
HBASE-20399	Fix merge layout	Minor	UI
HBASE-20233	[metrics] Ill-formatted numRegions metric in "Hadoop:service=HBase,name=RegionServer,sub=Regions" mbean	Trivial	metrics, Operability
HBASE-20410	upgrade protoc compiler to 3.5.1-1	Critical	build, dependencies, Protobufs
HBASE-20224	Web UI is broken in standalone mode	Blocker	UI, Usability
HBASE-20394	HBase over rides the value of HBASE_OPTS (if any) set by client	Minor	Operability
HBASE-20397	Make it more explicit that monkey.properties is found on CLASSPATH	Trivial	.
HBASE-20376	RowCounter and CellCounter documentations are incorrect	Minor	documentation, mapreduce
HBASE-20330	ProcedureExecutor.start() gets stuck in recover lease on store.	Major	proc-v2
HBASE-20350	NullPointerException in Scanner during close()	Blocker	.
HBASE-20280	Fix possibility of deadlocking in refreshFileConnections when prefetch is enabled	Major	BucketCache
HBASE-20310	[hbck] bin/hbase hbck -metaonly shows false inconsistency on HBase 2	Major	hbck
HBASE-20219	An error occurs when scanning with reversed=true and loadColumnFamiliesOnDemand=true	Critical	phoenix
HBASE-20358	Fix bin/hbase thrift usage text	Minor	.
HBASE-20382	If RSGroups not enabled, rsgroup.jsp prints stack trace	Major	rsgroup, UI
HBASE-20385	Purge md5-making from our little make_rc.sh script	Minor	.
HBASE-20384	[AMv2] Logging format improvements; use encoded name rather than full region name marking transitions	Minor	.
HBASE-20182	Can not locate region after split and merge	Blocker	Region Assignment
HBASE-20363	TestNamespaceAuditor.testRegionMerge is flaky	Major	test
HBASE-20362	TestMasterShutdown.testMasterShutdownBeforeStartingAnyRegionServer is flaky	Major	test
HBASE-20295	TableOutputFormat.checkOutputSpecs throw NullPointerException Exception	Major	mapreduce
HBASE-20343	[DOC] fix log directory paths	Critical	documentation
HBASE-16499	slow replication for small HBase clusters	Critical	Replication
HBASE-17518	HBase Reference Guide has a syntax error	Minor	documentation
HBASE-20231	Not able to delete column family from a row using RemoteHTable	Major	REST
HBASE-20259	Doc configs for in-memory-compaction and add detail to in-memory-compaction logging	Critical	.
HBASE-17631	Canary interval too low	Major	canary
HBASE-20282	Provide short name invocations for useful tools	Major	documentation, tooling
HBASE-20314	Precommit build for master branch fails because of surefire fork fails	Major	build
HBASE-20261	Table page (table.jsp) in Master UI does not show replicaIds for hbase meta table	Minor	UI
HBASE-20229	ConnectionImplementation.locateRegions() returns duplicated entries when region replication is on	Major	.
HBASE-20308	test Dockerfile needs to include git	Blocker	build, test
HBASE-20130	Use defaults (16020 & 16030) as base ports when the RS is bound to localhost	Critical	documentation
HBASE-20111	Able to split region explicitly even on shouldSplit return false from split policy	Critical	.
HBASE-20292	Wrong URLs in the descriptions for update_all_config and update_config commands in shell	Trivial	shell
HBASE-13300	Fix casing in getTimeStamp() and setTimestamp() for Mutations	Critical	API
HBASE-20237	Put back getClosestRowBefore and throw UnknownProtocolException instead... for asynchbase client	Critical	compatibility, Operability
HBASE-20090	Properly handle Preconditions check failure in MemStoreFlusher$FlushHandler.run	Major	.
HBASE-19639	ITBLL can't go big because RegionTooBusyException... Above memstore limit	Blocker	.
HBASE-20213	[LOGGING] Aligning formatting and logging less (compactions, in-memory compactions)	Major	logging
HBASE-20141	Fix TooManyFiles exception when RefreshingChannels in FileIOEngine	Major	BucketCache
HBASE-18216	[AMv2] Workaround for HBASE-18152, corrupt procedure WAL	Major	proc-v2
HBASE-20200	list_procedures fails in shell	Major	shell
HBASE-20185	Fix ACL check for MasterRpcServices#execProcedure	Major	.
HBASE-20146	Regions are stuck while opening when WAL is disabled	Critical	wal
HBASE-20187	Shell startup fails with IncompatibleClassChangeError	Blocker	shell
HBASE-20189	Typo in Required Java Version error message while building HBase.	Trivial	build
HBASE-20078	MultiByteBuff : bug in reading primitives when individual buffers are too small	Major	.
HBASE-19075	Task tabs on master UI cause page scroll	Major	master
HBASE-20104	Fix infinite loop of RIT when creating table on a rsgroup that has no online servers	Major	rsgroup
HBASE-19802	Wrong usage messages on shell commands (grant/revoke namespace syntax)	Minor	shell
HBASE-20153	enable error-prone analysis in precommit	Major	community
HBASE-20024	TestMergeTableRegionsProcedure is STILL flakey	Major	.
HBASE-19598	Fix TestAssignmentManagerMetrics flaky test	Major	test
HBASE-20162	[nightly] depending on pipeline execution we sometimes refer to the wrong workspace	Critical	test
HBASE-20164	failed hadoopcheck should add footer link	Major	community
HBASE-20160	TestRestartCluster.testRetainAssignmentOnRestart uses the wrong condition to decide whether the assignment is finished	Major	Region Assignment
HBASE-20114	Fix IllegalFormatConversionException in rsgroup.jsp	Major	UI
HBASE-20144	The shutdown of master will hang if there are no live region server	Major	Recovery
HBASE-19987	update error-prone to 2.2.0	Major	.
HBASE-20108	`hbase zkcli` falls into a non-interactive prompt after HBASE-15199	Critical	Usability
HBASE-19814	Release hbase-2.0.0-beta-2; "rolling upgrade" release	Blocker	.
HBASE-20134	support scripts use hard-coded /tmp	Minor	website
HBASE-20070	website generation is failing	Blocker	website
HBASE-19147	All branch-2 unit tests pass	Blocker	test
HBASE-20110	Findbugs in zk and mr caused nightly #409 branch-2 to fail	Major	findbugs
HBASE-19656	Disable TestAssignmentManagerMetrics for beta-1	Major	.
HBASE-19863	java.lang.IllegalStateException: isDelete failed when SingleColumnValueFilter is used	Major	Filters
HBASE-20106	API Compliance checker should fall back to specifying origin as remote repo	Major	API, community
HBASE-20066	Region sequence id may go backward after split or merge	Critical	.
HBASE-20086	PE randomSeekScan fails with ClassNotFoundException	Major	.
HBASE-20074	[FindBugs] Same code on both branches in CompactingMemStore#initMemStoreCompactor	Major	findbugs
HBASE-19974	Fix decommissioned servers cannot be removed by remove_servers_rsgroup methods	Major	rsgroup
HBASE-20043	ITBLL fails against hadoop3	Major	integration tests
HBASE-19583	update RM list to remove EOM versions	Minor	community, documentation
HBASE-19728	Add lock to filesCompacting in all place.	Major	.
HBASE-20061	HStore synchronized member variable filesCompacting should be private	Major	regionserver
HBASE-20062	findbugs is not running on precommit checks	Blocker	community, test
HBASE-20054	Forward port HBASE-18282 ReplicationLogCleaner can delete WALs not yet replicated in case of KeeperException	Major	.
HBASE-20049	Region replicas of SPLIT and MERGED regions are kept in in-memory states until restarting master	Major	read replicas
HBASE-19767	Master web UI shows negative values for Remaining KVs	Major	.
HBASE-19391	Calling HRegion#initializeRegionInternals from a region replica can still re-create a region directory	Major	.
HBASE-19166	AsyncProtobufLogWriter persists ProtobufLogWriter as class name for backward compatibility	Blocker	wal
HBASE-20027	Add test TestClusterPortAssignment	Major	.
HBASE-19953	Avoid calling post* hook when procedure fails	Critical	master, proc-v2
HBASE-20037	Race when calling SequenceIdAccounting.resetHighest	Blocker	wal
HBASE-19991	lots of hbase-rest test failures against hadoop 3	Major	REST, test
HBASE-19920	TokenUtil.obtainToken unnecessarily creates a local directory	Major	.
HBASE-20017	BufferedMutatorImpl submit the same mutation repeatedly	Blocker	Client
HBASE-20032	Receving multiple warnings for missing reporting.plugins.plugin.version	Minor	hbase
HBASE-19954	Separate TestBlockReorder into individual tests to avoid ShutdownHook suppression error against hadoop3	Major	.
HBASE-20023	CompactionTool command line examples are incorrect	Trivial	hbase
HBASE-14897	TestTableLockManager.testReapAllTableLocks is flakey	Major	.
HBASE-20020	Make sure we throw DoNotRetryIOException when ConnectionImplementation is closed	Critical	Client
HBASE-19980	NullPointerException when restoring a snapshot after splitting a region	Major	snapshots
HBASE-19998	Flakey TestVisibilityLabelsWithDefaultVisLabelService	Major	flakey, test
HBASE-19996	Some nonce procs might not be cleaned up (follow up HBASE-19756)	Major	.
HBASE-18282	ReplicationLogCleaner can delete WALs not yet replicated in case of a KeeperException	Critical	Replication
HBASE-19979	ReplicationSyncUp tool may leak Zookeeper connection	Major	Replication
HBASE-19876	The exception happening in converting pb mutation to hbase.mutation messes up the CellScanner	Critical	.
HBASE-19977	FileMmapEngine allocation of byte buffers should be synchronized	Major	.
HBASE-19986	If HBaseTestClassRule timesout a test, thread dump.	Major	.
HBASE-19968	MapReduce test fails with NoClassDefFoundError against hadoop3	Major	.
HBASE-16060	1.x clients cannot access table state talking to 2.0 cluster	Blocker	.
HBASE-19972	Should rethrow the RetriesExhaustedWithDetailsException when failed to apply the batch in ReplicationSink	Critical	Replication
HBASE-19964	TestWriteHeavyIncrementObserver fails	Major	test
HBASE-19966	The WriteEntry for WALKey maybe null if we failed to call WAL.append	Major	wal
HBASE-19937	Ensure createRSGroupTable be called after ProcedureExecutor and LoadBalancer are initialized	Major	rsgroup
HBASE-19929	Call RS.stop on a session expired RS may hang	Major	wal
HBASE-19900	Region-level exception destroy the result of batch	Critical	.
HBASE-19941	Flaky TestCreateTableProcedure times out in nightly, needs to LargeTests	Major	test
HBASE-19934	HBaseSnapshotException when read replicas is enabled and online snapshot is taken after region splitting	Major	snapshots
HBASE-19939	TestSplitTableRegionProcedure#testSplitWithoutPONR() and testRecoveryAndDoubleExecution() are failing with NPE	Major	amv2
HBASE-19907	TestMetaWithReplicas still flakey	Major	.
HBASE-19907	TestMetaWithReplicas still flakey	Major	.
HBASE-19926	Use a separated class to implement the WALActionListener for Replication	Major	Replication, wal
HBASE-19703	Functionality added as part of HBASE-12583 is not working after moving the split code to master	Major	.
HBASE-19658	Fix and reenable TestCompactingToCellFlatMapMemStore#testFlatteningToJumboCellChunkMap	Major	test
HBASE-19905	ReplicationSyncUp tool will not exit if a peer replication is disabled	Major	Replication
HBASE-19726	Failed to start HMaster due to infinite retrying on meta assign	Major	.
HBASE-19919	Tidying up logging	Major	.
HBASE-19901	Up yetus proclimit on nightlies	Major	.
HBASE-19884	BucketEntryGroup's equals, hashCode and compareTo methods are not consistent	Major	.
HBASE-19906	TestZooKeeper Timeout	Major	.
HBASE-19892	Checking 'patch attach' and yetus 0.7.0 and move to Yetus 0.7.0	Major	.
HBASE-19871	delete.rb should require user to provide the column	Major	shell
HBASE-19818	Scan time limit not work if the filter always filter row key	Major	.
HBASE-19756	Master NPE during completed failed proc eviction	Major	.
HBASE-17079	HBase build fails on windows, hbase-archetype-builder is reason for failure	Major	build
HBASE-19853	duplicate slf4j declaration in mapreduce pom	Minor	dependencies
HBASE-19838	Can not shutdown backup master cleanly when it has already tried to become the active master	Critical	master
HBASE-19780	Change execution phase of checkstyle plugin back to default 'verify'	Major	.
HBASE-19774	incorrect behavior of locateRegionInMeta	Major	.
HBASE-17513	Thrift Server 1 uses different QOP settings than RPC and Thrift Server 2 and can easily be misconfigured so there is no encryption when the operator expects it.	Critical	documentation, security, Thrift, Usability
HBASE-19836	Fix TestZooKeeper.testLogSplittingAfterMasterRecoveryDueToZKExpiry	Major	test
HBASE-19794	TestZooKeeper hangs	Critical	.
HBASE-19828	Flakey TestRegionsOnMasterOptions.testRegionsOnAllServers	Major	.
HBASE-19829	hadoop-minicluster pulls zookeeper:test-jar:tests 3.4.6	Minor	.
HBASE-19163	"Maximum lock count exceeded" from region server's batch processing	Major	regionserver
HBASE-19757	System table gets stuck after enabling region server group feature in secure cluster	Critical	.
HBASE-19825	Fix hadoop3 compat test failures	Major	pom
HBASE-19822	HFileCleaner threads stick around after shutdown stuck on queue#take	Major	.
HBASE-19815	Flakey TestAssignmentManager.testAssignWithRandExec	Major	flakey, test
HBASE-19821	TestCleanerChore#testOnConfigurationChange() requires at least 4 processors to get passed	Minor	test
HBASE-19806	Lower max versions for table column family of hbase:meta	Trivial	.
HBASE-19812	TestFlushSnapshotFromClient fails because of failing region.flush	Major	.
HBASE-19816	Replication sink list is not updated on UnknownHostException	Major	Replication
HBASE-19784	stop-hbase gives unfriendly message when local hbase isn't running	Minor	scripts
HBASE-19196	Release hbase-2.0.0-beta-1; the "Finish-line" release	Blocker	.
HBASE-19808	Reenable TestMultiParallel	Major	test
HBASE-19792	TestReplicationSmallTests.testDisableEnable fails	Major	test
HBASE-19797	Operator priority leads to wrong logic in ReplicationSourceWALReader	Major	.
HBASE-19732	Replica regions does not return back the MSLAB chunks to pool	Critical	.
HBASE-19768	RegionServer startup failing when DN is dead	Critical	.
HBASE-19752	RSGroupBasedLoadBalancer#getMisplacedRegions() should handle the case where rs group cannot be determined	Major	.
HBASE-11409	Add more flexibility for input directory structure to LoadIncrementalHFiles	Major	.
HBASE-19694	The initialization order for a fresh cluster is incorrect	Critical	.
HBASE-19769	IllegalAccessError on package-private Hadoop metrics2 classes in MapReduce jobs	Critical	mapreduce, metrics
HBASE-19775	hbase shell doesn't handle the exceptions that are wrapped in java.io.UncheckedIOException	Major	shell
HBASE-19771	restore_snapshot shell command gives wrong namespace if the namespace doesn't exist	Minor	.
HBASE-19773	Adding javadoc around getting instance of RawCellBuilder	Minor	.
HBASE-19685	Fix TestFSErrorsExposed#testFullSystemBubblesFSErrors	Major	test
HBASE-19755	Error message for non-existent namespace is inaccurate	Minor	.
HBASE-19749	Revisit logic of UserScanQueryMatcher#mergeFilterResponse method	Major	.
HBASE-19740	Repeated error message for NamespaceExistException	Minor	.
HBASE-19734	IntegrationTestReplication broken w/ separate clusters	Critical	integration tests
HBASE-19729	UserScanQueryMatcher#mergeFilterResponse should return INCLUDE_AND_SEEK_NEXT_ROW when filterResponse is INCLUDE_AND_SEEK_NEXT_ROW	Major	.
HBASE-19744	Fix flakey TestZKLeaderManager	Major	test
HBASE-19717	IntegrationTestDDLMasterFailover is using outdated values for DataBlockEncoding	Major	integration tests
HBASE-19424	Metrics servlet throws NPE	Minor	.
HBASE-19712	Fix TestSnapshotQuotaObserverChore#testSnapshotSize	Major	test
HBASE-19696	Filter returning INCLUDE_AND_NEXT_COL doesn't skip remaining versions when scan has explicit columns	Critical	.
HBASE-19721	Unnecessary stubbings detected in test class: TestReversedScannerCallable	Major	test
HBASE-19714	`status 'detailed'` invokes nonexistent "getRegionsInTransition" method on ClusterStatus	Critical	shell
HBASE-19709	Guard against a ThreadPool size of 0 in CleanerChore	Critical	.
HBASE-19383	[1.2] java.lang.AssertionError: expected:<2> but was:<1> at org.apache.hadoop.hbase.TestChoreService.testTriggerNowFailsWhenNotScheduled(TestChoreService.java:707)	Major	test
HBASE-19688	TimeToLiveProcedureWALCleaner should extends BaseLogCleanerDelegate	Minor	.
HBASE-18452	VerifyReplication by Snapshot should cache HDFS token before submit job for kerberos env.	Major	.
HBASE-19588	Additional jar dependencies needed for mapreduce PerformanceEvaluation	Minor	test
HBASE-19490	Rare failure in TestRateLimiter	Major	test
HBASE-19691	Do not require ADMIN permission for obtaining ClusterStatus	Critical	.
HBASE-19392	TestReplicaWithCluster#testReplicaGetWithPrimaryAndMetaDown failure in master	Minor	regionserver
HBASE-19654	Remove misleading and chatty debug message in ReplicationLogCleaner	Major	.
HBASE-19666	TestDefaultCompactSelection test failed	Critical	test
HBASE-19671	Fix TestMultiParallel#testActiveThreadsCount	Minor	test
HBASE-19672	Correct comments for default values of major compaction in SortedCompactionPolicy#getNextMajorCompactTime()	Minor	.
HBASE-19643	Need to update cache location when get error in AsyncBatchRpcRetryingCaller	Major	.
HBASE-19619	Modify replication_admin.rb to use ReplicationPeerConfigBuilder	Critical	.
HBASE-19624	TestIOFencing hangs	Major	.
HBASE-19496	Reusing the ByteBuffer in rpc layer corrupt the ServerLoad and RegionLoad	Blocker	.
HBASE-19457	Debugging flaky TestTruncateTableProcedure#testRecoveryAndDoubleExecutionPreserveSplits	Major	.
HBASE-19608	Race in MasterRpcServices.getProcedureResult	Major	proc-v2
HBASE-19593	Possible NPE if wal is closed during waledit append.	Major	.
HBASE-19589	New regions should always be added with state CLOSED (followup of HBASE-19530)	Major	.
HBASE-17248	SimpleRegionNormalizer javadoc correction	Trivial	master
HBASE-19148	Reevaluate default values of configurations	Blocker	defaults
HBASE-19578	MasterProcWALs cleaning is incorrect	Critical	amv2
HBASE-19559	Fix TestLogRolling.testLogRollOnDatanodeDeath	Major	test, wal
HBASE-19218	Master stuck thinking hbase:namespace is assigned after restart preventing intialization	Critical	.
HBASE-19542	fix TestSafemodeBringsDownMaster	Major	.
HBASE-19563	A few hbase-procedure classes missing @InterfaceAudience annotation	Minor	proc-v2
HBASE-19561	maxCacheSize in CacheEvictionStats can't be accumulated repeatedly When dealing with each region	Major	.
HBASE-19558	TestRegionsOnMasterOptions hack so it works reliablly	Major	test
HBASE-19555	TestSplitTransactionOnCluster is flaky	Major	test
HBASE-19532	AssignProcedure#COMPARATOR may produce incorrect sort order	Critical	.
HBASE-19549	Change path comparison in CommonFSUtils	Major	.
HBASE-19546	TestMasterReplication.testCyclicReplication2 uses wrong assertion	Major	Replication, test
HBASE-19522	The complete order may be wrong in AsyncBufferedMutatorImpl	Major	.
HBASE-19530	New regions should always be added with state CLOSED	Major	.
HBASE-19509	RSGroupAdminEndpoint#preCreateTable triggers TableNotFoundException	Minor	.
HBASE-18352	Enable TestMasterOperationsForRegionReplicas#testCreateTableWithMultipleReplicas disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-18838	shaded artifacts are incorrect when built against hadoop 3	Critical	Client
HBASE-18946	Stochastic load balancer assigns replica regions to the same RS	Major	.
HBASE-19516	IntegrationTestBulkLoad and IntegrationTestImportTsv run into 'java.lang.RuntimeException: DistributedHBaseCluster@1bb564e2 not an instance of MiniHBaseCluster'	Major	.
HBASE-19513	Fix the wrapped AsyncFSOutput implementation	Major	wal
HBASE-19511	Splits causes blocks to be cached again and so such blocks cannot be evicted from bucket cache	Critical	BucketCache
HBASE-19510	TestDistributedLogSplitting is flakey for AsyncFSWAL	Critical	Recovery, test
HBASE-19287	master hangs forever if RecoverMeta send assign meta region request to target server fail	Major	proc-v2
HBASE-19503	Fix TestWALOpenAfterDNRollingStart for AsyncFSWAL	Major	Replication, wal
HBASE-19434	create_namespace command for existing namespace does not throw useful error message	Minor	.
HBASE-19484	The value array written by ExtendedCell#write is out of bounds	Blocker	.
HBASE-19508	ReadOnlyConfiguration throws exception if any Configuration in current context calls addDefautlResource	Major	conf
HBASE-19456	RegionMover's region server hostname option is no longer case insensitive	Major	tooling
HBASE-19495	Fix failed ut TestShell	Major	.
HBASE-19394	Support multi-homing env for the publication of RS status with multicast (hbase.status.published)	Major	Client, master
HBASE-19493	Make TestWALMonotonicallyIncreasingSeqId also work with AsyncFSWAL	Major	test
HBASE-19371	Running WALPerformanceEvaluation against asyncfswal throws exceptions	Major	.
HBASE-19134	Make WALKey an Interface; expose Read-Only version to CPs	Major	Coprocessors, wal
HBASE-19461	TestRSGroups is broke	Major	test
HBASE-19433	ChangeSplitPolicyAction modifies an immutable HTableDescriptor	Critical	integration tests
HBASE-19454	Debugging TestDistributedLogSplitting#testThreeRSAbort	Major	.
HBASE-19349	Introduce wrong version depencency of servlet-api jar	Critical	.
HBASE-19435	Reopen Files for ClosedChannelException in BucketCache	Major	BucketCache
HBASE-12444	Total number of requests overflow because it's int	Minor	hbck, master, regionserver
HBASE-19447	INFO level logging of GetClusterStatus from HMaster is too chatty	Major	.
HBASE-19417	Remove boolean return value from postBulkLoadHFile hook	Major	.
HBASE-19445	PerformanceEvaluation NPE processing split policy option	Trivial	.
HBASE-19023	Usage for rowcounter in refguide is out of sync with code	Major	.
HBASE-19422	using hadoop-profile property leads to confusing failures	Major	.
HBASE-19384	Results returned by preAppend hook in a coprocessor are replaced with null from other coprocessor even on bypass	Critical	Coprocessors
HBASE-19431	The tag array written by IndividualBytesFieldCell#write is out of bounds	Critical	.
HBASE-18942	hbase-hadoop2-compat module ignores hadoop-3 profile	Major	.
HBASE-19056	TestCompactionInDeadRegionServer is top of the flakies charts!	Major	test
HBASE-19339	Eager policy results in the negative size of memstore	Critical	.
HBASE-16239	Better logging for RPC related exceptions	Major	.
HBASE-19396	Fix flaky test TestHTableMultiplexerFlushCache	Minor	test
HBASE-19406	Fix CompactionRequest equals and hashCode	Major	.
HBASE-19285	Add per-table latency histograms	Critical	metrics
HBASE-19390	Revert to older version of Jetty 9.3	Major	.
HBASE-19385	[1.3] TestReplicator failed 1.3 nightly	Major	test
HBASE-19350	TestMetaWithReplicas is flaky	Major	.
HBASE-19388	Incorrect value is being set for Compaction Pressure in RegionLoadStats object inside HRegion class	Minor	regionserver
HBASE-19386	HBase UnsafeAvailChecker returns false on Arm64	Minor	.
HBASE-19363	Tests under TestCheckAndMutate are identical	Minor	.
HBASE-19035	Miss metrics when coprocessor use region scanner to read data	Major	.
HBASE-19351	Deprecated is missing in Table implementations	Minor	.
HBASE-19355	Missing dependency on hbase-zookeeper module causes CopyTable to fail	Major	.
HBASE-19335	Fix waitUntilAllRegionsAssigned	Major	.
HBASE-19318	MasterRpcServices#getSecurityCapabilities explicitly checks for the HBase AccessController implementation	Critical	master, security
HBASE-19319	Fix bug in synchronizing over ProcedureEvent	Major	.
HBASE-19325	Pass a list of server name to postClearDeadServers	Major	.
HBASE-19337	AsyncMetaTableAccessor may hang when call ScanController.terminate many times	Major	.
HBASE-19332	DumpReplicationQueues misreports total WAL size	Trivial	Replication
HBASE-19310	Verify IntegrationTests don't rely on Rules outside of JUnit context	Critical	integration tests
HBASE-19317	Increase "yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage" to avoid host-related failures on MiniMRCluster	Major	integration tests, test
HBASE-19330	Remove duplicated dependency from hbase-rest	Trivial	dependencies
HBASE-19321	ZKAsyncRegistry ctor would hang when zookeeper cluster is not available	Major	.
HBASE-19315	Incorrect snapshot version is used for 2.0.0-beta-1	Minor	.
HBASE-19304	KEEP_DELETED_CELLS should ignore case	Blocker	regionserver
HBASE-19260	Add lock back to avoid parallel accessing meta to locate region	Major	.
HBASE-19181	LogRollBackupSubprocedure will fail if we use AsyncFSWAL instead of FSHLog	Major	backup&restore
HBASE-18356	Enable TestFavoredStochasticBalancerPickers#testPickers that was disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-18357	Enable disabled tests in TestHCM that were disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-19223	Remove references to Date Tiered compaction from branch-1.2 and branch-1.1 ref guide	Critical	Compaction, documentation
HBASE-19255	PerformanceEvaluation class not found when run PE test	Major	.
HBASE-19245	MultiTableInputFormatBase#getSplits creates a Connection per Table	Minor	mapreduce
HBASE-12091	Optionally ignore edits for dropped tables for replication.	Major	.
HBASE-19210	TestNamespacesInstanceResource fails	Major	.
HBASE-19249	test for "hbase antipatterns" should check _count_ of occurance rather than text of	Critical	build
HBASE-19240	Fix error-prone errors, part four?	Major	.
HBASE-19215	Incorrect exception handling on the client causes incorrect call timeouts and byte buffer allocations on the server	Major	rpc
HBASE-19250	TestClientClusterStatus is flaky	Trivial	.
HBASE-19246	Trivial fix in findHangingTests.py	Trivial	.
HBASE-19244	Fix simple typos in HBASE-15518 descriptions	Trivial	.
HBASE-19089	Fix the list of included moduleSets in src and binary tars	Major	build
HBASE-19229	Nightly script to check source artifact should not do a destructive git operation without opt-in	Critical	build
HBASE-19199	RatioBasedCompactionPolicy#shouldPerformMajorCompaction() always return true when only one file needs to compact	Major	.
HBASE-19195	More error-prone fixes	Major	.
HBASE-19165	TODO Handle stuck in transition: rit=OPENING, location=ve0538....	Critical	migration
HBASE-19184	clean up nightly source artifact test to match expectations from switch to git-archive	Critical	build
HBASE-19211	B&R: update configuration string in BackupRestoreConstants	Minor	.
HBASE-19194	TestRSGroupsBase has some always false checks	Blocker	rsgroup, test
HBASE-19088	move_tables_rsgroup will throw an exception when the table is disabled	Major	rsgroup
HBASE-19198	TestIPv6NIOServerSocketChannel fails; unable to bind	Minor	test
HBASE-19102	TestZooKeeperMainServer fails with KeeperException$ConnectionLossException	Major	.
HBASE-18844	Release hbase-2.0.0-alpha-4; Theme "Coprocessor API Cleanup"	Major	.
HBASE-19111	Add missing CellUtil#isPut(Cell) methods	Critical	Client
HBASE-19160	Re-expose CellComparator	Critical	.
HBASE-19185	ClassNotFoundException: com.fasterxml.jackson.*	Critical	mapreduce
HBASE-18983	Upgrade to latest error-prone	Major	build
HBASE-19178	table.rb use undefined method 'getType' for Cell interface	Trivial	.
HBASE-19117	Avoid NPE occurring while active master dies	Minor	.
HBASE-19173	Configure IntegrationTestRSGroup automatically for minicluster mode	Minor	rsgroup, test
HBASE-19144	[RSgroups] Retry assignments in FAILED_OPEN state when servers (re)join the cluster	Major	rsgroup
HBASE-19124	Move HBase-Nightly source artifact creation test from JenkinsFile to a script in dev-support	Major	test
HBASE-19156	Duplicative regions_per_server options on LoadTestTool	Trivial	test
HBASE-19118	Use SaslUtil to set Sasl.QOP in 'Thrift'	Major	Thrift
HBASE-19150	TestSnapshotWithAcl is flaky	Minor	.
HBASE-19120	IllegalArgumentException from ZNodeClearer when master shuts down	Major	.
HBASE-19065	HRegion#bulkLoadHFiles() should wait for concurrent Region#flush() to finish	Major	.
HBASE-19100	Missing break in catch block of InterruptedException in HRegion#waitForFlushesAndCompactions	Major	.
HBASE-19137	Nightly test should make junit reports optional rather than attempt archive after reporting.	Critical	build
HBASE-19135	TestWeakObjectPool time out	Major	.
HBASE-19138	Rare failure in TestLruBlockCache	Trivial	test
HBASE-19030	nightly runs should attempt to log test results after archiving	Critical	test
HBASE-19130	Typo in HStore.initializeRegionInternals for replaying wal	Critical	Recovery
HBASE-19087	Log an Optional's value/null instead of Optional[value]/Optional.empty.	Major	.
HBASE-19129	TestChoreService is flaky (branch-1 / branch-1.4)	Trivial	.
HBASE-19119	hbase-http shouldn't have a native profile	Blocker	build
HBASE-18438	Precommit doesn't warn about unused imports	Critical	build
HBASE-18922	Fix all dead links in our HBase book	Major	documentation
HBASE-19094	NPE in RSGroupStartupWorker.waitForGroupTableOnline during master startup	Minor	.
HBASE-13346	Clean up Filter package for post 1.0 s/KeyValue/Cell/g	Critical	API, Filters
HBASE-19098	Python based compatiblity checker fails if git repo does not have a remote named 'origin'	Critical	tooling
HBASE-19077	Have Region*CoprocessorEnvironment provide an ImmutableOnlineRegions	Critical	Coprocessors
HBASE-19073	Cleanup CoordinatedStateManager	Major	.
HBASE-19054	Switch precommit docker image to one based on maven images	Major	build, community
HBASE-19018	Use of hadoop internals that require bouncycastle should declare bouncycastle dependency	Critical	dependencies, test
HBASE-19021	Restore a few important missing logics for balancer in 2.0	Critical	.
HBASE-19066	Correct the directory of openjdk-8 for jenkins	Major	build
HBASE-16290	Dump summary of callQueue content; can help debugging	Major	Operability
HBASE-18846	Accommodate the hbase-indexer/lily/SEP consumer deploy-type	Major	.
HBASE-19072	Missing break in catch block of InterruptedException in HRegion#waitForFlushes()	Major	.
HBASE-19058	The wget isn't installed in building docker image	Major	build
HBASE-19039	refactor shadedjars test to only run on java changes.	Major	build
HBASE-19060	"Hadoop check" test is running all the time instead of just when changes to java	Critical	build
HBASE-19061	enforcer NPE on hbase-shaded-invariants	Blocker	build
HBASE-19014	surefire fails; When writing xml report stdout/stderr ... No such file or directory	Major	.
HBASE-19042	Oracle Java 8u144 downloader broken in precommit check	Blocker	build
HBASE-19020	TestXmlParsing exception checking relies on a particular xml implementation without declaring it.	Major	dependencies, REST
HBASE-19038	precommit mvn install should run from root on patch	Major	build
HBASE-19032	Set Content-Type header for patches uploaded by submit-patch.py	Major	.
HBASE-18350	RSGroups are broken under AMv2	Blocker	rsgroup
HBASE-18990	ServerLoad doesn't override #equals which leads to #equals in ClusterStatus always false	Trivial	.
HBASE-19017	[AMv2] EnableTableProcedure is not retaining the assignments	Major	Region Assignment
HBASE-19016	Coordinate storage policy property name for table schema and bulkload	Minor	.
HBASE-18997	Remove the redundant methods in RegionInfo	Major	.
HBASE-18355	Enable export snapshot tests that were disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-18505	Our build/yetus personality will run tests on individual modules and then on all (i.e. 'root'). Should do one or other	Critical	build
HBASE-18998	processor.getRowsToLock() always assumes there is some row being locked	Major	.
HBASE-18992	Comparators passed to the Memstore's flattened segments seems to be wrong	Major	.
HBASE-17590	Drop cache hint should work for StoreFile write path	Major	.
HBASE-18975	Fix backup / restore hadoop3 incompatibility	Blocker	.
HBASE-18904	Missing break in NEXT_ROW case of FilterList#mergeReturnCodeForOrOperator()	Minor	.
HBASE-18934	precommit on branch-1 isn't supposed to run against hadoop 3	Critical	test
HBASE-18973	clean up maven warnings about pom well-formedness for master/branch-2	Minor	build
HBASE-18958	Remove the IS annotation from SpaceLimitingException	Trivial	.
HBASE-18921	Result.current() throws ArrayIndexOutOfBoundsException after calling advance()	Minor	.
HBASE-18940	branch-2 (and probably others) fail check of generated source artifact	Critical	build
HBASE-18874	HMaster abort message will be skipped if Throwable is passed null	Minor	.
HBASE-18941	Confusing logging error around rerun of restore on an existing table.	Minor	.
HBASE-18932	Backups masking exception in a scenario and though it fails , it shows success message.	Major	.
HBASE-18606	Tests in hbase-spark module fail with UnsatisfiedLinkError	Critical	spark, test
HBASE-18928	Backup delete command shows wrong number of deletes requested	Minor	.
HBASE-18490	Modifying a table descriptor to enable replicas does not create replica regions	Major	Region Assignment
HBASE-18913	TestShell fails because NoMethodError: undefined method parseColumn	Major	shell
HBASE-18894	null pointer exception in list_regions in shell command	Major	.
HBASE-17441	precommit test "hadoopcheck" not properly testing Hadoop 3 profile	Blocker	build
HBASE-18845	TestReplicationSmallTests fails after HBASE-14004	Major	Replication
HBASE-18887	After full backup passed on hdfs root and incremental failed, full backup cannot be cleaned	Major	.
HBASE-18888	StealJobQueue should call super() to init the PriorityBlockingQueue	Major	.
HBASE-18885	HFileOutputFormat2 hardcodes default FileOutputCommitter	Major	mapreduce
HBASE-18880	Failed to start rest server if the value of hbase.rest.threads.max is too small.	Critical	REST
HBASE-18762	Canary sink type cast error	Major	.
HBASE-18830	TestCanaryTool does not check Canary monitor's error code	Major	.
HBASE-18876	Backup create command fails to take queue parameter as option	Major	.
HBASE-18796	Admin#isTableAvailable returns incorrect result before daughter regions are opened	Major	.
HBASE-18866	clean up warnings about proto syntax	Minor	Protobufs
HBASE-18787	Fix the "dependencies connecting to an HBase cluster"	Minor	documentation
HBASE-18853	hbase-protocol-shaded includes protobuf (since we moved to hbase-thirdparty)	Major	thirdparty
HBASE-18852	Take down the hbasecon asia banner on home page	Major	website
HBASE-18851	LICENSE failure after HADOOP-14799 with Hadoop 3	Critical	build
HBASE-18832	LTT fails with casting exception for HColumnDescriptor	Major	.
HBASE-18803	Mapreduce job get failed caused by NoClassDefFoundError: org/apache/commons/lang3/ArrayUtils	Major	.
HBASE-18808	Ineffective config check in BackupLogCleaner#getDeletableFiles()	Major	.
HBASE-18836	Note need for explicit javax.el and exclude from shaded artifacts	Blocker	Client
HBASE-18834	fix shellcheck warning on hbase personality	Minor	test
HBASE-18831	Add explicit dependency on javax.el	Major	dependencies
HBASE-18641	Include block content verification logic used in lruCache in bucketCache	Minor	regionserver
HBASE-14004	[Replication] Inconsistency between Memstore and WAL may result in data in remote cluster that is not in the origin	Critical	regionserver, Replication
HBASE-18801	Bulk load cleanup may falsely deem file deletion successful	Major	.
HBASE-18813	TestCanaryTool fails on branch-1 / branch-1.4	Major	.
HBASE-18818	TestConnectionImplemenation fails	Major	test
HBASE-16611	Flakey org.apache.hadoop.hbase.client.TestReplicasClient.testCancelOfMultiGet	Major	.
HBASE-18723	[pom cleanup] Do a pass with dependency:analyze; remove unused and explicity list the dependencies we exploit	Major	pom
HBASE-18789	Displays the reporting interval of each RS on the Master page	Major	.
HBASE-18771	Incorrect StoreFileRefresh leading to split and compaction failures	Blocker	.
HBASE-18791	HBASE_HOME/lib does not contain hbase-mapreduce-${project.version}-tests.jar	Major	.
HBASE-17853	Link to "Why does HBase care about /etc/hosts?" does not work	Trivial	documentation
HBASE-18759	Fix hbase-shaded-check-invariants failure	Blocker	Client, mapreduce
HBASE-18765	The value of balancerRan is true even though no plans are executed	Minor	rsgroup
HBASE-18543	Re-enable test master.TestMasterFailover on master	Major	amv2
HBASE-17713	the interface '/version/cluster' with header 'Accept: application/json' return is not JSON but plain text	Minor	REST
HBASE-18757	Fix Improper bitwise & in BucketCache offset calculation	Major	BucketCache
HBASE-18743	HFiles in use by a table which has the same name and namespace with a default table cloned from snapshot may be deleted when that snapshot and default table are deleted	Critical	hbase
HBASE-15497	Incorrect javadoc for atomicity guarantee of Increment and Append	Minor	documentation
HBASE-16390	Fix documentation around setAutoFlush	Minor	documentation
HBASE-18741	Remove cancel command from backup code	Major	.
HBASE-18461	Build broken If the username contains a backslash	Minor	.
HBASE-18306	Get rid of TableDescriptor#getConfiguration	Critical	.
HBASE-15947	Classes used only for tests included in main code base	Trivial	build, test
HBASE-18714	The dropBehind and readahead don't be applied when useHBaseChecksum is enabled	Minor	.
HBASE-14745	Shade the last few dependencies in hbase-shaded-client	Blocker	Client, dependencies
HBASE-18665	ReversedScannerCallable invokes getRegionLocations incorrectly	Critical	.
HBASE-18568	Correct metric of numRegions	Critical	metrics
HBASE-18369	hbase thrift web-ui not available	Major	Thrift
HBASE-18640	Move mapreduce out of hbase-server into separate hbase-mapreduce module	Major	.
HBASE-18633	Add more info to understand the source/scenario of large batch requests exceeding threshold	Major	.
HBASE-18635	Fix asciidoc warnings	Major	.
HBASE-18671	Support Append/Increment in rest api	Major	REST
HBASE-16722	Document: Broken link in CatalogJanitor	Trivial	documentation
HBASE-18679	YARN may null Counters object and cause an NPE in ITBLL	Trivial	integration tests
HBASE-18607	fix submit-patch.py to support utf8	Trivial	.
HBASE-18287	Remove log warning in PartitionedMobCompactor.java#getFileStatus	Minor	mob
HBASE-18647	Parameter cacheBlocks does not take effect in REST API for scan	Major	REST
HBASE-18628	ZKPermissionWatcher blocks all ZK notifications	Critical	regionserver
HBASE-18614	Setting BUCKET_CACHE_COMBINED_KEY to false disables stats on RS UI	Major	regionserver
HBASE-18575	[AMv2] Enable and fix TestRestartCluster#testRetainAssignmentOnRestart on master	Critical	amv2
HBASE-18655	TestAsyncClusterAdminApi2 failing sometimes	Major	.
HBASE-18615	hbase-rest tests fail in hbase-2.0.0-alpha2	Blocker	test
HBASE-18644	Duplicate "compactionQueueLength" metric in Region Server metrics	Minor	metrics
HBASE-16615	Fix flaky TestScannerHeartbeatMessages	Major	Client, Scanners
HBASE-18627	Fix TestRegionServerReadRequestMetrics	Major	test
HBASE-18634	Fix client.TestClientClusterStatus	Major	test
HBASE-18637	Update the link of "Bending time in HBase"	Trivial	documentation
HBASE-18471	The DeleteFamily cell is skipped when StoreScanner seeks to next column	Critical	Deletes, hbase, scan
HBASE-18572	Delete can't remove the cells which have no visibility label	Critical	.
HBASE-18617	FuzzyRowKeyFilter should not modify the filter pairs	Minor	.
HBASE-18125	HBase shell disregards spaces at the end of a split key in a split file	Major	shell
HBASE-18587	Fix Flaky TestFileIOEngine	Major	BucketCache, test
HBASE-18431	Mitigate compatibility concerns between branch-1.3 and branch-1.4	Blocker	.
HBASE-18493	[AMv2] On region server crash do not process system table regions through AssignmentManager.checkIfShouldMoveSystemRegionAsync()	Critical	amv2
HBASE-18598	AsyncNonMetaRegionLocator use FIFO algorithm to get a candidate locate request	Minor	asyncclient
HBASE-18437	Revoke access permissions of a user from a table does not work as expected	Major	security
HBASE-18526	FIFOCompactionPolicy pre-check uses wrong scope	Major	master
HBASE-18599	Add missing @Deprecated annotations	Minor	.
HBASE-17803	PE always re-creates table when we specify the split policy	Minor	.
HBASE-18592	[hbase-thirdparty] Doc on new hbase-thirdparty dependency for the refguide	Major	documentation
HBASE-18557	change splitable to mergeable in MergeTableRegionsProcedure	Major	.
HBASE-18025	CatalogJanitor should collect outdated RegionStates from the AM	Major	read replicas
HBASE-18551	[AMv2] UnassignProcedure and crashed regionservers	Major	amv2
HBASE-18390	Sleep too long when finding region location failed	Major	Client
HBASE-18563	Fix RAT License complaint about website jenkins scripts	Trivial	.
HBASE-18024	HRegion#initializeRegionInternals should not re-create .hregioninfo file when the region directory no longer exists	Major	Region Assignment, regionserver
HBASE-18560	Test master.assignment.TestAssignmentManager hangs on master and its in flaky list	Major	.
HBASE-18262	name of parameter quote need update in hbase-default.xml	Minor	.
HBASE-18525	TestAssignmentManager#testSocketTimeout fails in master branch	Major	.
HBASE-18492	[AMv2] Embed code for selecting highest versioned region server for system table regions in AssignmentManager.processAssignQueue()	Major	amv2
HBASE-18516	[AMv2] Remove dead code in ServerManager resulted mostly from AMv2 refactoring	Major	.
HBASE-18470	Remove the redundant comma from RetriesExhaustedWithDetailsException#getDesc	Minor	Client
HBASE-17056	Remove checked in PB generated files	Critical	.
HBASE-18480	The cost of BaseLoadBalancer.cluster is changed even if the rollback is done	Major	Balancer
HBASE-18491	[AMv2] Fail UnassignProcedure if source Region Server is not online.	Critical	amv2
HBASE-18487	Minor fixes in row lock implementation	Major	.
HBASE-18475	MasterProcedureScheduler incorrectly passes null Procedure to table locking	Major	proc-v2
HBASE-18259	HBase book link to "beginner" issues includes resolved issues	Major	documentation
HBASE-18481	The autoFlush flag was not used in PE tool	Minor	.
HBASE-18406	In ServerCrashProcedure.java start(MasterProcedureEnv) is a no-op	Major	.
HBASE-18473	VC.listLabels() erroneously closes any connection	Major	Client
HBASE-17131	Avoid livelock caused by HRegion#processRowsWithLocks	Major	regionserver
HBASE-18185	IntegrationTestTimeBoundedRequestsWithRegionReplicas unbalanced tests fails with AssertionError	Minor	integration tests
HBASE-18362	hbck should not report split replica parent region from meta as errors	Minor	hbck
HBASE-17839	"Data Model" section: Table 1 has only 5 data rows instead 6.	Trivial	documentation
HBASE-18445	Upgrading Guava broke hadoop-3.0 profile	Blocker	build, dependencies, hadoop3
HBASE-18449	Fix client.locking.TestEntityLocks#testHeartbeatException	Minor	test
HBASE-18447	MetricRegistryInfo#hashCode uses hashCode instead of toHashCode	Minor	.
HBASE-18441	ZookeeperWatcher#interruptedException should throw exception	Major	.
HBASE-18054	log when we add/remove failed servers in client	Major	Client, Operability
HBASE-18427	minor cleanup around AssignmentManager	Minor	amv2
HBASE-18323	Remove multiple ACLs for the same user in kerberos	Minor	.
HBASE-18354	Fix TestMasterMetrics that were disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-18433	Convenience method for creating simple ColumnFamilyDescriptor	Major	Client
HBASE-18430	Typo in "contributing to documentation" page	Major	documentation
HBASE-18404	Small typo on ACID documentation page	Trivial	documentation
HBASE-16993	BucketCache throw java.io.IOException: Invalid HFile block magic when configuring hbase.bucketcache.bucket.sizes	Major	BucketCache
HBASE-18337	hbase-shaded-server brings in signed jars	Major	shading
HBASE-18330	NPE in ReplicationZKLockCleanerChore	Major	master, Replication
HBASE-18393	hbase shell non-interactive broken	Blocker	scripts, shell
HBASE-17648	HBase Table-level synchronization fails between two secured(kerberized) clusters	Critical	mapreduce, Operability, security, tooling
HBASE-16090	ResultScanner is not closed in SyncTable#finishRemainingHashRanges()	Major	mapreduce, Operability, tooling
HBASE-15548	SyncTable: sourceHashDir is supposed to be optional but won't work without	Critical	mapreduce, Operability, tooling
HBASE-18377	Error handling for FileNotFoundException should consider RemoteException in openReader()	Major	.
HBASE-18260	Address new license dependencies from hadoop3-alpha4	Major	dependencies
HBASE-18177	FanOutOneBlockAsyncDFSOutputHelper fails to compile against Hadoop 3	Major	wal
HBASE-18358	Backport HBASE-18099 'FlushSnapshotSubprocedure should wait for concurrent Region#flush() to finish' to branch-1.3	Critical	snapshots
HBASE-18348	The implementation of AsyncTableRegionLocator does not follow the javadoc	Critical	asyncclient, Client
HBASE-18292	Fix flaky test hbase.master.locking.TestLockProcedure#testLocalMasterLockRecovery()	Major	.
HBASE-17705	Procedure execution must fail fast if procedure is not registered	Blocker	.
HBASE-18341	Update findHangingTests.py script to match changed consoleText of trunk build	Major	.
HBASE-18335	clean up configuration guide	Major	documentation
HBASE-18329	update links in config guide to point to java 8 references	Major	documentation
HBASE-18312	Ineffective handling of FileNotFoundException in FileLink$FileLinkInputStream.tryOpen()	Major	.
HBASE-17931	Assign system tables to servers with highest version	Blocker	Region Assignment, scan
HBASE-18325	Disable flakey TestMasterProcedureWalLease	Major	test
HBASE-16120	Add shell test for truncate_preserve	Minor	.
HBASE-18301	Enable TestSimpleRegionNormalizerOnCluster#testRegionNormalizationMergeOnCluster that was disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-18310	LoadTestTool unable to write data	Major	util
HBASE-18320	Address maven-site-plugin upgrade steps	Blocker	website
HBASE-18311	clean up the quickstart guide	Major	documentation
HBASE-13866	Add endpoint coprocessor to the section hbase.coprocessor.region.classes in HBase book	Trivial	documentation
HBASE-18302	Protobuf section in the docs needs some clean up	Blocker	documentation
HBASE-16192	Fix the potential problems in TestAcidGuarantees	Major	.
HBASE-17982	Is the word "occured" should be "occurred ?	Trivial	hbase
HBASE-18290	Fix TestAddColumnFamilyProcedure and TestDeleteTableProcedure	Major	test
HBASE-18278	[AMv2] Enable and fix uni test hbase.master.procedure.TestServerCrashProcedure#testRecoveryAndDoubleExecutionOnRsWithMeta	Major	.
HBASE-18244	org.apache.hadoop.hbase.client.rsgroup.TestShellRSGroups hangs/fails	Major	test
HBASE-18230	Generated LICENSE file includes unsubstituted Velocity variables	Major	build
HBASE-18274	hbase autorestart will overwrite the gc log	Major	hbase
HBASE-18265	Correct the link unuseful in regionServer's region state UI	Trivial	UI
HBASE-18263	Resolve NPE in backup Master UI when access to procedures.jsp	Trivial	UI
HBASE-18254	ServerCrashProcedure checks and waits for meta initialized, instead should check and wait for meta loaded	Major	amv2
HBASE-18235	LoadBalancer.BOGUS_SERVER_NAME should not have a bogus hostname	Major	.
HBASE-18212	In Standalone mode with local filesystem HBase logs Warning message:Failed to invoke 'unbuffer' method in class class org.apache.hadoop.fs.FSDataInputStream	Minor	Operability
HBASE-17988	get-active-master.rb and draining_servers.rb no longer work	Critical	scripts
HBASE-18180	Possible connection leak while closing BufferedMutator in TableOutputFormat	Major	mapreduce
HBASE-18227	[AMv2] Fix test hbase.coprocessor.TestCoprocessorMetrics#testRegionObserverAfterRegionClosed	Major	amv2
HBASE-18225	Fix findbugs regression calling toString() on an array	Trivial	.
HBASE-18166	[AMv2] We are splitting already-split files	Major	Region Assignment
HBASE-18209	Include httpclient / httpcore jars in build artifacts	Major	.
HBASE-18219	Fix typo in constant HConstants.HBASE_CLIENT_MEAT_REPLICA_SCAN_TIMEOUT	Minor	.
HBASE-18200	Set hadoop check versions for branch-2 and branch-2.x in pre commit	Major	build
HBASE-18207	branch-2 build fails in the checkstyle phase	Major	.
HBASE-18137	Replication gets stuck for empty WALs	Critical	Replication
HBASE-18199	Race in NettyRpcConnection may cause call stuck in BufferCallBeforeInitHandler forever	Major	IPC/RPC
HBASE-18192	Replication drops recovered queues on region server shutdown	Blocker	Replication
HBASE-18092	Removing a peer does not properly clean up the ReplicationSourceManager state and metrics	Major	Replication
HBASE-18193	Master web UI presents the incorrect number of regions	Minor	.
HBASE-18195	Remove redundant single quote from start message for HMaster and HRegionServer	Minor	master, regionserver
HBASE-18141	Regionserver fails to shutdown when abort triggered in RegionScannerImpl during RPC call	Critical	regionserver, security
HBASE-15302	Reenable the other tests disabled by HBASE-14678	Major	test
HBASE-18184	Add hbase-hadoop2-compat jar as MapReduce job dependency	Minor	mapreduce
HBASE-18149	The setting rules for table-scope attributes and family-scope attributes should keep consistent	Major	shell
HBASE-18158	Two running in-memory compaction threads may lose data	Major	.
HBASE-18145	The flush may cause the corrupt data for reading	Blocker	.
HBASE-18132	Low replication should be checked in period in case of datanode rolling upgrade	Major	.
HBASE-9393	Hbase does not closing a closed socket resulting in many CLOSE_WAIT	Critical	.
HBASE-18005	read replica: handle the case that region server hosting both primary replica and meta region is down	Major	.
HBASE-18030	Per Cell TTL tags may get duplicated with increments/Append causing tags length overflow	Critical	hbase, regionserver
HBASE-18155	TestMasterProcedureWalLease is flakey	Major	amv2
HBASE-18111	Replication stuck when cluster connection is closed	Major	.
HBASE-18143	[AMv2] Backoff on failed report of region transition quickly goes to astronomical time scale	Critical	Region Assignment
HBASE-18129	truncate_preserve fails when the truncate method doesn't exists on the master	Major	shell
HBASE-18122	Scanner id should include ServerName of region server	Major	.
HBASE-18027	Replication should respect RPC size limits when batching edits	Major	Replication
HBASE-18042	Client Compatibility breaks between versions 1.2 and 1.3	Critical	regionserver, scan
HBASE-18118	Default storage policy if not configured cannot be "NONE"	Minor	wal
HBASE-16011	TableSnapshotScanner and TableSnapshotInputFormat can produce duplicate rows	Major	snapshots
HBASE-18120	Fix TestAsyncRegionAdminApi	Major	test
HBASE-18113	Handle old client without include_stop_row flag when startRow equals endRow	Major	.
HBASE-17997	In dev environment, add jruby-complete jar to classpath only when jruby is needed	Major	.
HBASE-18099	FlushSnapshotSubprocedure should wait for concurrent Region#flush() to finish	Critical	snapshots
HBASE-18084	Improve CleanerChore to clean from directory which consumes more disk space	Major	.
HBASE-18085	Prevent parallel purge in ObjectPool	Major	.
HBASE-18093	Overloading the meaning of 'enabled' in Quota Manager to indicate either quota disabled or quota manager not ready is not good	Minor	master
HBASE-18077	Update JUnit license to EPL from CPL	Blocker	build, community
HBASE-18069	Fix flaky test TestReplicationAdminWithClusters#testDisableAndEnableReplication	Trivial	test
HBASE-15616	Allow null qualifier for all table operations	Major	Client
HBASE-18081	The way we process connection preamble in SimpleRpcServer is broken	Major	IPC/RPC
HBASE-18035	Meta replica does not give any primaryOperationTimeout to primary meta region	Critical	.
HBASE-18071	Fix flaky test TestStochasticLoadBalancer#testBalanceCluster	Major	Balancer
HBASE-18058	Zookeeper retry sleep time should have an upper limit	Major	.
HBASE-17286	LICENSE.txt in binary tarball contains only ASL text	Blocker	build, community
HBASE-18049	It is not necessary to re-open the region when MOB files cannot be found	Major	Scanners
HBASE-18053	AsyncTableResultScanner will hang when scan wrong column family	Major	Client
HBASE-18051	balance_rsgroup still run when the Load Balancer is not enabled.	Major	rsgroup
HBASE-17352	Fix hbase-assembly build with bash 4	Minor	.
HBASE-18055	Releasing L2 cache HFileBlocks before shipped() when switching from pread to stream causes result corruption	Major	regionserver, Scanners
HBASE-18000	Make sure we always return the scanner id with ScanResponse	Major	regionserver
HBASE-18026	ProtobufUtil seems to do extra array copying	Minor	.
HBASE-16356	REST API scanner: row prefix filter and custom filter parameters are mutually exclusive	Minor	REST
HBASE-8758	Error in RegionCoprocessorHost class preScanner method documentation.	Minor	Coprocessors, documentation
HBASE-17471	Region Seqid will be out of order in WAL if using mvccPreAssign	Critical	wal
HBASE-17964	ensure hbase-metrics-api is included in mapreduce job classpaths	Blocker	mapreduce
HBASE-17991	Add more details about compaction queue on /dump	Minor	.
HBASE-17228	precommit grep -c ERROR may grab non errors	Minor	build, community, test
HBASE-17958	Avoid passing unexpected cell to ScanQueryMatcher when optimize SEEK to SKIP	Major	.
HBASE-17985	Inline package manage updates with package installation in Yetus Dockerfile	Blocker	.
HBASE-17957	Custom metrics of replicate endpoints don't prepend "source." to global metrics	Minor	Replication
HBASE-17862	Condition that always returns true	Trivial	Client
HBASE-14286	Correct typo in argument name for WALSplitter.writeRegionSequenceIdFile	Trivial	.
HBASE-17879	Avoid NPE in snapshot.jsp when accessing without any request parameter	Trivial	UI
HBASE-17975	TokenUtil.obtainToken squashes remote exceptions	Blocker	mapreduce, security
HBASE-17970	Set yarn.app.mapreduce.am.staging-dir when starting MiniMRCluster	Major	mapreduce, snapshots, test
HBASE-17950	Write the chunkId also as Int instead of long into the first byte of the chunk	Major	.
HBASE-17904	Get runs into NoSuchElementException when using Read Replica, with hbase. ipc.client.specificThreadForWriting to be true and hbase.rpc.client.impl to be org.apache.hadoop.hbase.ipc.RpcClientImpl	Major	Client, IPC/RPC
HBASE-17947	Location of Examples.proto is wrong in comment of RowCountEndPoint.java	Trivial	Coprocessors
HBASE-17302	The region flush request disappeared from flushQueue	Major	.
HBASE-17943	The in-memory flush size is different for each CompactingMemStore located in the same region	Major	regionserver
HBASE-17946	Shell command compact_rs don't work	Major	shell
HBASE-17941	CellArrayMap#getCell may throw IndexOutOfBoundsException	Minor	.
HBASE-13288	Fix naming of parameter in Delete constructor	Trivial	API
HBASE-17937	Memstore size becomes negative in case of expensive postPut/Delete Coprocessor call	Major	regionserver
HBASE-17940	HMaster can not start due to Jasper related classes conflict	Blocker	dependencies, pom
HBASE-17936	Refine sum endpoint example in ref guide	Minor	documentation
HBASE-17930	Avoid using Canary.sniff in HBaseTestingUtility	Major	canary, test
HBASE-16875	Changed try-with-resources in the docs to recommended way	Trivial	documentation
HBASE-17366	Run TestHFile#testReaderWithoutBlockCache failes	Trivial	test
HBASE-15535	Correct link to Trafodion	Minor	documentation
HBASE-17903	Corrected the alias for the link of HBASE-6580	Trivial	documentation
HBASE-17816	HRegion#mutateRowWithLocks should update writeRequestCount metric	Major	metrics
HBASE-17905	[hbase-spark] bulkload does not work when table not exist	Major	.
HBASE-17863	Procedure V2: Proc Executor cleanup. Split FINISHED state to two states: SUCCESS and FAILED.	Major	proc-v2
HBASE-17886	Fix compatibility of ServerSideScanMetrics	Blocker	.
HBASE-17869	UnsafeAvailChecker wrongly returns false on ppc	Minor	.
HBASE-17871	scan#setBatch(int) call leads wrong result of VerifyReplication	Minor	.
HBASE-15871	Memstore flush doesn't finish because of backwardseek() in memstore scanner.	Major	Scanners
HBASE-17785	RSGroupBasedLoadBalancer fails to assign new table regions when cloning snapshot	Major	.
HBASE-17698	ReplicationEndpoint choosing sinks	Major	Replication
HBASE-16780	Since move to protobuf3.1, Cells are limited to 64MB where previous they had no limit	Critical	Protobufs
HBASE-17821	The CompoundConfiguration#toString is wrong	Trivial	.
HBASE-17660	HFileSplitter is not being applied during full table restore	Major	.
HBASE-17287	Master becomes a zombie if filesystem object closes	Blocker	master
HBASE-17807	correct the value of zookeeper.session.timeout in hbase doc	Trivial	documentation
HBASE-17798	RpcServer.Listener.Reader can abort due to CancelledKeyException	Major	.
HBASE-17812	Remove RpcConnection from pool in AbstractRpcClient.cancelConnections	Major	Client, rpc
HBASE-16014	Get and Put constructor argument lists are divergent	Major	.
HBASE-17582	Drop page cache hint is broken	Critical	Compaction, io
HBASE-16084	Clean up the stale references in javadoc	Minor	.
HBASE-17426	Inconsistent environment variable names for enabling JMX	Major	.
HBASE-17792	Use a shared thread pool for AtomicityWriter, AtomicGetReader, AtomicScanReader's connections in TestAcidGuarantees	Minor	.
HBASE-17723	ClientAsyncPrefetchScanner may end prematurely when the size of the cache is one	Major	.
HBASE-17779	disable_table_replication returns misleading message and does not turn off replication	Major	Replication
HBASE-17780	BoundedByteBufferPool "At capacity" messages are not actionable	Minor	.
HBASE-17501	NullPointerException after Datanodes Decommissioned and Terminated	Minor	Filesystem Integration, Operability
HBASE-17773	VerifyReplication tool wrongly emits warning "ERROR: Invalid argument '--recomparesleep=xx'"	Trivial	.
HBASE-17746	TestSimpleRpcScheduler.testCoDelScheduling is broken	Major	integration tests
HBASE-17772	IntegrationTestRSGroup won't run	Minor	rsgroup
HBASE-17712	Remove/Simplify the logic of RegionScannerImpl.handleFileNotFound	Major	regionserver
HBASE-17763	IPCUtil.wrapException will wrap DoNotRetryIOException with IOException	Major	IPC/RPC
HBASE-17736	Some options can't be configured by the shell	Minor	.
HBASE-17761	Test TestRemoveRegionMetrics.testMoveRegion fails intermittently because of race condition	Major	Region Assignment
HBASE-17760	HDFS Balancer doc is misleading	Minor	documentation
HBASE-17718	Difference between RS's servername and its ephemeral node cause SSH stop working	Major	.
HBASE-17729	Missing shortcuts for some useful HCD options	Trivial	shell
HBASE-17717	Incorrect ZK ACL set for HBase superuser	Critical	security, Zookeeper
HBASE-17460	enable_table_replication can not perform cyclic replication of a table	Critical	Replication
HBASE-16630	Fragmentation in long running Bucket Cache	Critical	BucketCache
HBASE-17722	Metrics subsystem stop/start messages add a lot of useless bulk to operational logging	Trivial	metrics
HBASE-17710	HBase in standalone mode creates directories with 777 permission	Major	regionserver
HBASE-17673	Monitored RPC Handler not shown in the WebUI	Minor	.
HBASE-17688	MultiRowRangeFilter not working correctly if given same start and stop RowKey	Minor	.
HBASE-17699	Fix TestLockProcedure	Blocker	proc-v2
HBASE-17674	Major compaction may be cancelled in CompactionChecker	Major	Compaction
HBASE-17682	Region stuck in merging_new state indefinitely	Major	.
HBASE-17069	RegionServer writes invalid META entries for split daughters in some circumstances	Blocker	wal
HBASE-17677	ServerName parsing from directory name should be more robust to errors from guava's HostAndPort	Major	wal
HBASE-13882	Fix RegionSplitPolicy section in HBase book	Trivial	documentation
HBASE-17675	ReplicationEndpoint should choose new sinks if a SaslException occurs	Major	.
HBASE-15328	Unvalidated Redirect in HMaster	Minor	security
HBASE-17661	fix the queue length passed to FastPathBalancedQueueRpcExecutor	Minor	.
HBASE-17653	HBASE-17624 rsgroup synchronizations will (distributed) deadlock	Major	rsgroup
HBASE-17658	Fix bookkeeping error with max regions for a table	Major	Balancer
HBASE-17421	Update refguide w.r.t. MOB Sweeper	Major	documentation, mob
HBASE-17649	REST API for scan should return 410 when table is disabled	Major	.
HBASE-17640	Unittest error in TestMobCompactor with different timezone	Minor	mob
HBASE-17624	Address late review of HBASE-6721, rsgroups feature	Major	rsgroup
HBASE-17639	Do not stop server if ReplicationSourceManager's waitUntilCanBePushed throws InterruptedException	Major	Replication
HBASE-17558	ZK dumping jsp should escape html	Minor	security, UI
HBASE-9702	Change unittests that use "table" or "testtable" to use method names.	Major	test
HBASE-17611	Thrift 2 per-call latency metrics are capped at ~ 2 seconds	Major	metrics, Thrift
HBASE-17603	REST API for scan should return 404 when table does not exist	Blocker	REST, scan
HBASE-17638	Remove duplicated initialization of CacheConfig in HRegionServer	Minor	.
HBASE-17622	Add hbase-metrics package to TableMapReduceUtil	Trivial	mapreduce
HBASE-17616	Incorrect actions performed by CM	Major	.
HBASE-17105	Annotate RegionServerObserver	Major	.
HBASE-17381	ReplicationSourceWorkerThread can die due to unhandled exceptions	Major	Replication
HBASE-17565	StochasticLoadBalancer may incorrectly skip balancing due to skewed multiplier sum	Critical	.
HBASE-17606	Fix failing TestRpcControllerFactory introduced by HBASE-17508	Major	Client, scan
HBASE-17187	DoNotRetryExceptions from coprocessors should bubble up to the application	Major	.
HBASE-17578	Thrift per-method metrics should still update in the case of exceptions	Major	Thrift
HBASE-17593	Fix build with hadoop 3 profile	Major	.
HBASE-17601	close() in TableRecordReaderImpl assumes the split has started	Minor	hadoop2
HBASE-17587	Do not Rethrow DoNotRetryIOException as UnknownScannerException	Major	Coprocessors, regionserver, rpc
HBASE-17581	mvn clean test -PskipXXXTests does not work properly for some modules	Major	.
HBASE-16621	HBCK should have -fixHFileLinks	Major	.
HBASE-17522	RuntimeExceptions from MemoryMXBean should not take down server process	Major	regionserver
HBASE-17197	hfile does not work in 2.0	Major	HFile
HBASE-17538	HDFS.setStoragePolicy() logs errors on local fs	Major	.
HBASE-16785	We are not running all tests	Major	build, test
HBASE-17540	Change SASL server GSSAPI callback log line from DEBUG to TRACE in RegionServer to reduce log volumes in DEBUG mode	Minor	regionserver
HBASE-17271	hbase-thrift QA tests only run one test	Major	.
HBASE-17407	Correct update of maxFlushedSeqId in HRegion	Major	wal
HBASE-17489	ClientScanner may send a next request to a RegionScanner which has been exhausted	Critical	Client, scan
HBASE-17357	PerformanceEvaluation parameters parsing triggers NPE.	Minor	Performance, test
HBASE-17496	RSGroup shell commands:get_server_rsgroup don't work and commands display an incorrect result size	Major	shell
HBASE-17486	Tighten the contract for batch client methods	Trivial	API
HBASE-17482	mvcc mechanism fails when using mvccPreAssign	Critical	.
HBASE-17469	Properly handle empty TableName in TablePermission#readFields and #write	Major	findbugs
HBASE-17475	Stack overflow in AsyncProcess if retry too much	Major	API, Client
HBASE-17464	Fix HBaseTestingUtility.getNewDataTestDirOnTestFS to always return a unique path	Minor	test
HBASE-17450	TablePermission#equals throws NPE after namespace support was added	Major	findbugs
HBASE-17452	Failed taking snapshot - region Manifest proto-message too large	Major	snapshots
HBASE-17434	New Synchronization Scheme for Compaction Pipeline	Major	.
HBASE-17445	Count size of serialized exceptions in checking max result size quota	Major	.
HBASE-17429	HBase bulkload cannot support HDFS viewFs	Major	.
HBASE-17435	Call to preCommitStoreFile() hook encounters SaslException in secure deployment	Major	.
HBASE-17430	dead links in ref guide to class javadocs that moved out of user APIs.	Major	documentation, website
HBASE-17424	Protect REST client against malicious XML responses.	Major	REST
HBASE-17351	Enforcer plugin fails with NullPointerException	Critical	build
HBASE-17290	Potential loss of data for replication of bulk loaded hfiles	Major	.
HBASE-17390	Online update of configuration for all servers leaves out masters	Major	.
HBASE-17403	ClientAsyncPrefetchScanner doesn’t load any data if the MaxResultSize is too small	Major	.
HBASE-17387	Reduce the overhead of exception report in RegionActionResult for multi()	Minor	.
HBASE-17385	Change usage documentation from bin/hbase to hbase in various tools	Major	.
HBASE-17374	ZKPermissionWatcher crashed when grant after region close	Critical	regionserver
HBASE-17376	ClientAsyncPrefetchScanner may fail due to too many rows	Major	.
HBASE-17330	SnapshotFileCache will always refresh the file cache	Minor	snapshots
HBASE-16663	JMX ConnectorServer stopped when unauthorized user try to stop HM/RS/cluster	Critical	metrics, security
HBASE-17341	Add a timeout during replication endpoint termination	Critical	.
HBASE-17328	Properly dispose of looped replication peers	Critical	Replication
HBASE-17347	ExportSnapshot may write snapshot info file to wrong directory when specifying target name	Minor	snapshots
HBASE-17344	The regionserver web UIs miss the coprocessors of RegionServerCoprocessorHost.	Minor	.
HBASE-17333	HBASE-17294 always ensures CompactingMemstore is default	Critical	.
HBASE-17326	Fix findbugs warning in BufferedMutatorParams	Major	.
HBASE-17309	Fix connection leaks in TestAcidGuarantees	Minor	integration tests
HBASE-17297	Single Filter in parenthesis cannot be parsed correctly	Major	Filters
HBASE-17237	Override the correct compact method in HMobStore	Major	mob
HBASE-16985	TestClusterId failed due to wrong hbase rootdir	Minor	test
HBASE-15437	Response size calculated in RPCServer for warning tooLarge responses does NOT count CellScanner payload	Major	IPC/RPC
HBASE-17256	Rpc handler monitoring will be removed when the task queue is full	Major	.
HBASE-17170	HBase is also retrying DoNotRetryIOException because of class loader differences.	Major	.
HBASE-17252	Wrong arguments for ValueAndTagRewriteCell in CellUtil	Major	.
HBASE-16841	Data loss in MOB files after cloning a snapshot and deleting that snapshot	Blocker	mob, snapshots
HBASE-17118	StoreScanner leaked in KeyValueHeap	Major	.
HBASE-17231	Region#getCellCompartor sp?	Trivial	.
HBASE-16886	hbase-client: scanner with reversed=true and small=true gets no result	Major	.
HBASE-17112	Prevent setting timestamp of delta operations the same as previous value's	Major	.
HBASE-16209	Provide an ExponentialBackOffPolicy sleep between failed region open requests	Major	.
HBASE-17206	FSHLog may roll a new writer successfully with unflushed entries	Critical	wal
HBASE-17224	There are lots of spelling errors in the HBase logging and exception messages	Trivial	Client, io, mapreduce, master, regionserver, security, wal
HBASE-17192	remove use of scala-tools.org from pom	Blocker	spark, website
HBASE-17186	MasterProcedureTestingUtility#testRecoveryAndDoubleExecution displays stale procedure state info	Minor	proc-v2, test
HBASE-17072	CPU usage starts to climb up to 90-100% when using G1GC; purge ThreadLocal usage	Critical	Performance, regionserver
HBASE-17116	[PerformanceEvaluation] Add option to configure block size	Trivial	tooling
HBASE-17127	Locate region should fail fast if underlying Connection already closed	Major	.
HBASE-17144	Possible offheap read ByteBuffers leak	Major	rpc
HBASE-17160	Undo unnecessary inter-module dependency; spark to hbase-it and hbase-it to shell	Minor	.
HBASE-17171	IntegrationTestTimeBoundedRequestsWithRegionReplicas fails with obtuse error when readers have no time to run	Minor	integration tests
HBASE-17158	Avoid deadlock caused by HRegion#doDelta	Major	.
HBASE-17166	ITBLL fails on master unable to find hbase-protocol-shaded content	Major	.
HBASE-17095	The ClientSimpleScanner keeps retrying if the hfile is corrupt or cannot found	Major	regionserver, scan
HBASE-16989	RowProcess#postBatchMutate doesn’t be executed before the mvcc transaction completion	Major	.
HBASE-17058	Lower epsilon used for jitter verification from HBASE-15324	Major	Compaction
HBASE-17082	ForeignExceptionUtil isn’t packaged when building shaded protocol with -Pcompile-protobuf	Major	.
HBASE-17091	IntegrationTestZKAndFSPermissions failed with 'KeeperException$NoNodeException'	Major	.
HBASE-17092	Both LoadIncrementalHFiles#doBulkLoad() methods should set return value	Major	.
HBASE-17044	Fix merge failed before creating merged region leaves meta inconsistent	Critical	regionserver
HBASE-17074	PreCommit job always fails because of OOM	Critical	build
HBASE-16345	RpcRetryingCallerWithReadReplicas#call() should catch some RegionServer Exceptions	Major	Client
HBASE-17062	RegionSplitter throws ClassCastException	Minor	util
HBASE-16962	Add readPoint to preCompactScannerOpen() and preFlushScannerOpen() API	Major	.
HBASE-17039	SimpleLoadBalancer schedules large amount of invalid region moves	Major	Balancer
HBASE-17020	keylen in midkey() dont computed correctly	Major	HFile
HBASE-16938	TableCFsUpdater maybe failed due to no write permission on peerNode	Major	Replication
HBASE-17052	compile-protobuf profile does not compile protobufs in some modules anymore	Major	.
HBASE-17054	Compactor#preCreateCoprocScanner should be passed user	Major	.
HBASE-16983	TestMultiTableSnapshotInputFormat failing with Unable to create region directory: /tmp/...	Minor	test
HBASE-17042	Remove 'public' keyword from MasterObserver interface	Minor	Coprocessors
HBASE-17033	LogRoller makes a lot of allocations unnecessarily	Major	.
HBASE-16992	The usage of mutation from CP is weird.	Minor	.
HBASE-17032	CallQueueTooBigException and CallDroppedException should not be triggering PFFE	Major	Client
HBASE-16960	RegionServer hang when aborting	Critical	.
HBASE-14329	Report region in transition only ever operates on one region	Major	Region Assignment
HBASE-16964	Successfully archived files are not cleared from compacted store file list if archiving of any file fails	Blocker	regionserver
HBASE-16976	hbase-protocol-shaded module generates classes to wrong directory	Minor	build
HBASE-16931	Setting cell's seqId to zero in compaction flow might cause RS down.	Critical	regionserver
HBASE-16980	TestRowProcessorEndpoint failing consistently	Major	.
HBASE-16966	Re-enable TestSimpleRpcScheduler#testCoDelScheduling in master branch	Major	test
HBASE-16974	Update os-maven-plugin to 1.4.1.final+ for building shade file on RHEL/CentOS	Minor	.
HBASE-16971	The passed durability of Append/Increment isn't used in wal sync	Major	.
HBASE-16743	TestSimpleRpcScheduler#testCoDelScheduling is broke	Major	rpc
HBASE-16948	Fix inconsistency between HRegion and Region javadoc on getRowLock	Major	.
HBASE-16949	Fix RAT License complaint about the hbase-protocol-shaded/src/main/patches content	Major	.
HBASE-16939	ExportSnapshot: set owner and permission on right directory	Minor	.
HBASE-16000	Table#checkAndPut() docs are too vague	Minor	documentation
HBASE-16880	Correct the javadoc/behaviour of the APIs in ByteBufferUtils	Major	.
HBASE-16930	AssignmentManager#checkWals() function can recur infinitely	Major	Region Assignment
HBASE-16887	Allow setting different hadoopcheck versions in precommit for different branches	Major	build
HBASE-15684	Fix the broken log file size accounting	Major	wal
HBASE-16870	Add the metrics of replication sources which were transformed from other dead rs to ReplicationLoad	Minor	Replication
HBASE-16815	Low scan ratio in RPC queue tuning triggers divide by zero exception	Major	regionserver, rpc
HBASE-16829	DemoClient should detect secure mode	Major	.
HBASE-16754	Regions failing compaction due to referencing non-existent store file	Blocker	.
HBASE-15348	Fix tests broken by recent metrics re-work	Major	metrics, test
HBASE-16910	Avoid NPE when starting StochasticLoadBalancer	Minor	Balancer
HBASE-16701	TestHRegion and TestHRegionWithInMemoryFlush timing out	Major	regionserver, test
HBASE-16889	Proc-V2: verifyTables in the IntegrationTestDDLMasterFailover test after each table DDL is incorrect	Major	proc-v2
HBASE-16884	Add HBase-2.0.x to the hadoop version support matrix in our documentation	Blocker	documentation
HBASE-16752	Upgrading from 1.2 to 1.3 can lead to replication failures due to difference in RPC size limit	Major	Replication, rpc
HBASE-16578	Mob data loss after mob compaction and normal compaction	Major	mob
HBASE-16824	Writer.flush() can be called on already closed streams in WAL roll	Major	wal
HBASE-16866	Avoid NPE in AsyncRequestFutureImpl#updateStats	Minor	.
HBASE-16733	add hadoop 3.0.0-alpha1 to precommit checks	Major	build, hadoop3
HBASE-16283	Batch Append/Increment will always fail if set ReturnResults to false	Minor	API
HBASE-16712	fix hadoop-3.0 profile mvn install	Major	build, hadoop3
HBASE-16721	Concurrency issue in WAL unflushed seqId tracking	Critical	wal
HBASE-16326	CellModel / RowModel should override 'equals', 'hashCode' and 'toString'	Trivial	REST
HBASE-16855	Avoid NPE in MetricsConnection’s construction	Minor	.
HBASE-16856	Exception message in SyncRunner.run() should print currentSequence	Minor	wal
HBASE-16853	Regions are assigned to Region Servers in /hbase/draining after HBase Master failover	Major	Balancer, Region Assignment
HBASE-16810	HBase Balancer throws ArrayIndexOutOfBoundsException when regionservers are in /hbase/draining znode and unloaded	Major	Balancer
HBASE-16664	Timeout logic in AsyncProcess is broken	Major	.
HBASE-16724	Snapshot owner can't clone	Major	snapshots
HBASE-16807	RegionServer will fail to report new active Hmaster until HMaster/RegionServer failover	Major	regionserver
HBASE-16716	OfflineMetaRepair leaves empty directory inside /hbase/WALs which remains forever	Minor	hbck
HBASE-16746	The log of “region close” should differ from “region move”	Minor	.
HBASE-16808	Included the generated, shaded java files from "HBASE-15638 Shade protobuf" in our src assembly	Blocker	.
HBASE-16731	Inconsistent results from the Get/Scan if we use the empty FilterList	Minor	.
HBASE-16801	The Append/Increment may return the data from future	Critical	.
HBASE-15109	HM/RS failed to start when "fs.hdfs.impl.disable.cache" is set to true	Critical	regionserver
HBASE-16622	Fix some issues with the HBase reference guide	Major	documentation
HBASE-16793	Exclude shaded protobuf files from rat check	Major	build
HBASE-16699	Overflows in AverageIntervalRateLimiter's refill() and getWaitInterval()	Major	.
HBASE-16771	VerifyReplication should increase GOODROWS counter if re-comparison passes	Major	.
HBASE-16768	Inconsistent results from the Append/Increment	Minor	.
HBASE-16767	Mob compaction needs to clean up files in /hbase/mobdir/.tmp and /hbase/mobdir/.tmp/.bulkload when running into IO exceptions	Major	mob
HBASE-16681	Fix flaky TestReplicationSourceManagerZkImpl	Major	.
HBASE-16753	There is a mismatch between suggested Java version in hbase-env.sh	Minor	scripts
HBASE-16644	Errors when reading legit HFile Trailer of old (v2.0) format file	Critical	HFile
HBASE-16763	Remove unintentional dependency on net.sf.ehcache.search.Results	Major	.
HBASE-16764	hbase-protocol-shaded generate-shaded-classes profile unpacks shaded java files into wrong location	Major	build
HBASE-16739	Timed out exception message should include encoded region name	Minor	.
HBASE-16678	MapReduce jobs do not update counters from ScanMetrics	Major	.
HBASE-16732	Avoid possible NPE in MetaTableLocator	Minor	.
HBASE-16723	RMI registry is not destroyed after stopping JMX Connector Server	Major	metrics
HBASE-16711	Fix hadoop-3.0 profile compile	Major	build, hadoop3
HBASE-16696	After HBASE-16604 - does not release blocks in case of scanner exception	Critical	.
HBASE-16682	Fix Shell tests failure. NoClassDefFoundError for MiniKdc	Major	.
HBASE-16660	ArrayIndexOutOfBounds during the majorCompactionCheck in DateTieredCompaction	Critical	Compaction
HBASE-16643	Reverse scanner heap creation may not allow MSLAB closure due to improper ref counting of segments	Critical	.
HBASE-16649	Truncate table with splits preserved can cause both data loss and truncated data appeared again	Major	.
HBASE-16704	Scan will be broken while working with DBE and KeyValueCodecWithTags	Major	.
HBASE-16645	Wrong range of Cells is caused by CellFlatMap#tailMap, headMap, and SubMap	Major	.
HBASE-16665	Check whether KeyValueUtil.createXXX could be replaced by CellUtil without copy	Major	.
HBASE-16697	bump TestRegionServerMetrics to LargeTests	Trivial	test
HBASE-16679	Flush throughput controller: Minor perf change and fix flaky TestFlushWithThroughputController	Major	.
HBASE-16693	The commit of HBASE-16604 creates a unrelated folder	Critical	.
HBASE-16688	Split TestMasterFailoverWithProcedures	Major	proc-v2, test
HBASE-16604	Scanner retries on IOException can cause the scans to miss data	Critical	regionserver, Scanners
HBASE-16662	Fix open POODLE vulnerabilities	Major	REST, Thrift
HBASE-16675	Average region size may be incorrect when there is region whose RegionLoad cannot be retrieved	Major	.
HBASE-16670	Make RpcServer#processRequest logic more robust	Minor	.
HBASE-12088	Remove un-used profiles in non-root poms	Major	.
HBASE-16669	fix flaky TestAdmin#testmergeRegions	Major	test
HBASE-16294	hbck reporting "No HDFS region dir found" for replicas	Minor	hbck
HBASE-12949	Scanner can be stuck in infinite loop if the HFile is corrupted	Major	.
HBASE-16654	Better handle channelInactive and close for netty rpc client	Major	.
HBASE-16540	Scan should do additional validation on start and stop row	Major	Client
HBASE-16647	hbck should do offline reference repair before online repair	Major	.
HBASE-16551	Cleanup SplitLogManager and CatalogJanitor	Trivial	master
HBASE-16635	RpcClient under heavy load leaks some netty bytebuf	Minor	.
HBASE-16165	Decrease RpcServer.callQueueSize before writeResponse causes OOM	Minor	IPC/RPC, rpc
HBASE-16624	MVCC DeSerialization bug in the HFileScannerImpl	Blocker	HFile
HBASE-16612	Use array to cache Types for KeyValue.Type.codeToType	Minor	.
HBASE-16491	A few org.apache.hadoop.hbase.rsgroup classes missing @InterfaceAudience annotation	Minor	API, regionserver
HBASE-16609	Fake cells EmptyByteBufferedCell created in read path not implementing SettableSequenceId	Major	.
HBASE-16614	Use daemon thread for netty event loop	Major	IPC/RPC, rpc
HBASE-15624	Move master branch/hbase-2.0.0 to jdk-8 only	Blocker	build
HBASE-16576	Shell add_peer doesn't allow setting cluster_key for custom endpoints	Major	shell
HBASE-16309	TestDefaultCompactSelection.testCompactionRatio is flaky	Major	Compaction, test
HBASE-16589	Adjust log level for FATAL messages from HBaseReplicationEndpoint that are not fatal	Trivial	.
HBASE-16544	Remove or Clarify 'Using Amazon S3 Storage' section in the reference guide	Major	documentation, Filesystem Integration
HBASE-16572	Sync method in RecoverableZooKeeper failed to pass callback function in	Minor	Zookeeper
HBASE-16460	Can't rebuild the BucketAllocator's data structures when BucketCache uses FileIOEngine	Major	BucketCache
HBASE-16556	The read/write timeout are not used in HTable.delete(List), HTable.get(List), and HTable.existsAll(List)	Minor	.
HBASE-16538	Version mismatch in HBaseConfiguration.checkDefaultsVersion	Major	.
HBASE-16552	MiniHBaseCluster#getServerWith() does not ignore stopped RSs	Trivial	test
HBASE-16547	hbase-archetype-builder shell scripts assume bash is installed in /bin	Trivial	.
HBASE-16375	Mapreduce mini cluster using HBaseTestingUtility not setting correct resourcemanager and jobhistory webapp address of MapReduceTestingShim	Minor	.
HBASE-16527	IOExceptions from DFS client still can cause CatalogJanitor to delete referenced files	Major	.
HBASE-15278	AsyncRPCClient hangs if Connection closes before RPC call response	Blocker	rpc, test
HBASE-16528	Procedure-V2: ServerCrashProcedure misses owner information	Major	hbase, master, proc-v2
HBASE-16535	Use regex to exclude generated classes for findbugs	Major	findbugs
HBASE-16515	AsyncProcess has incorrent count of tasks if the backoff policy is enabled	Minor	.
HBASE-16490	Fix race condition between SnapshotManager and SnapshotCleaner	Major	.
HBASE-16409	Row key for bad row should be properly delimited in VerifyReplication	Minor	.
HBASE-16495	When accessed via Thrift, all column families have timeToLive equal to -1	Minor	Thrift
HBASE-16304	HRegion#RegionScannerImpl#handleFileNotFoundException may lead to deadlock when trying to obtain write lock on updatesLock	Critical	.
HBASE-16270	Handle duplicate clearing of snapshot in region replicas	Major	Replication
HBASE-16471	Region Server metrics context will be wrong when machine hostname contain "master" word	Minor	metrics
HBASE-16456	Fix findbugs warnings in hbase-rsgroup module	Minor	.
HBASE-16464	archive folder grows bigger and bigger due to corrupt snapshot under tmp dir	Major	snapshots
HBASE-16360	TableMapReduceUtil addHBaseDependencyJars has the wrong class name for PrefixTreeCodec	Minor	mapreduce
HBASE-16446	append_peer_tableCFs failed when there already have this table's partial cfs in the peer	Minor	Replication
HBASE-16454	Compactor's shipping logic decision should be based on the current store's block size	Minor	.
HBASE-16444	CellUtil#estimatedSerializedSizeOfKey() should consider KEY_INFRASTRUCTURE_SIZE	Minor	.
HBASE-7621	REST client (RemoteHTable) doesn't support binary row keys	Major	REST
HBASE-16430	Fix RegionServer Group's bug when moving multiple tables	Major	master
HBASE-16429	FSHLog: deadlock if rollWriter called when ring buffer filled with appends	Critical	.
HBASE-16384	Update report-flakies.py script to allow specifying a list of build ids to be excluded	Major	.
HBASE-15635	Mean age of Blocks in cache (seconds) on webUI should be greater than zero	Major	.
HBASE-16341	Missing bit on "Regression: Random Read/WorkloadC slower in 1.x than 0.98"	Major	rpc
HBASE-16267	Remove commons-httpclient dependency from hbase-rest module	Critical	.
HBASE-16389	Thread leak in CoprocessorHost#getTable(TableName) API	Major	.
HBASE-16363	Correct javadoc for qualifier length and value length in Cell interface	Minor	documentation
HBASE-16368	test*WhenRegionMove in TestPartialResultsFromClientSide is flaky	Major	Scanners
HBASE-16310	Revisit the logic of filterRowKey for Filters	Major	.
HBASE-16361	Revert of HBASE-16317, "revert all ESAPI..." broke TestLogLevel	Major	dependencies, UI
HBASE-16367	Race between master and region server initialization may lead to premature server abort	Major	.
HBASE-16303	FilterList with MUST_PASS_ONE optimization	Major	Filters
HBASE-15866	Split hbase.rpc.timeout into *.read.timeout and *.write.timeout	Major	.
HBASE-16362	Mob compaction does not set cacheBlocks to false when creating StoreScanner	Major	Compaction, regionserver
HBASE-16359	NullPointerException in RSRpcServices.openRegion()	Major	.
HBASE-15461	ref guide has bad links to blogs originally posted on cloudera website	Major	website
HBASE-15574	Minor typo on HRegionServerCommandLine.java	Trivial	.
HBASE-16350	Undo server abort from HBASE-14968	Major	.
HBASE-16271	Fix logging and re-run the test in IntegrationTestBulkLoad	Major	.
HBASE-16347	Unevaluated expressions in book	Major	documentation, website
HBASE-16301	Trigger flush without waiting when compaction is disabled on a table	Minor	.
HBASE-16319	Fix TestCacheOnWrite after HBASE-16288	Trivial	.
HBASE-16315	RegionSizeCalculator prints region names as binary without escapes	Trivial	.
HBASE-16284	Unauthorized client can shutdown the cluster	Major	.
HBASE-16296	Reverse scan performance degrades when using filter lists	Major	Filters
HBASE-16288	HFile intermediate block level indexes might recurse forever creating multi TB files	Critical	HFile
HBASE-16234	Expect and handle nulls when assigning replicas	Major	Region Assignment
HBASE-16306	Add specific imports to avoid namespace clash in defaultSource.scala	Minor	.
HBASE-16300	LruBlockCache.CACHE_FIXED_OVERHEAD should calculate LruBlockCache size correctly	Major	.
HBASE-16289	AsyncProcess stuck messages need to print region/server	Critical	Operability
HBASE-16096	Replication keeps accumulating znodes	Major	Replication
HBASE-16293	TestSnapshotFromMaster#testSnapshotHFileArchiving flakey	Major	test
HBASE-16281	TestMasterReplication is flaky	Major	.
HBASE-16221	Thrift server drops connection on long scans	Major	Thrift
HBASE-16272	Overflow in ServerName's compareTo method	Major	hbase
HBASE-16244	LocalHBaseCluster start timeout should be configurable	Major	hbase
HBASE-16238	It's useless to catch SESSIONEXPIRED exception and retry in RecoverableZooKeeper	Minor	Zookeeper
HBASE-16172	Unify the retry logic in ScannerCallableWithReplicas and RpcRetryingCallerWithReadReplicas	Major	.
HBASE-16110	AsyncFS WAL doesn't work with Hadoop 2.8+	Blocker	wal
HBASE-16076	Cannot configure split policy in HBase shell	Minor	documentation
HBASE-16144	Replication queue's lock will live forever if RS acquiring the lock has died prematurely	Major	.
HBASE-16235	TestSnapshotFromMaster#testSnapshotHFileArchiving will fail if there are too many hfiles	Trivial	.
HBASE-16183	Correct errors in example programs of coprocessor in Ref Guide	Minor	documentation
HBASE-16095	Add priority to TableDescriptor and priority region open thread pool	Major	.
HBASE-16227	[Shell] Column value formatter not working in scans	Major	.
HBASE-16211	JMXCacheBuster restarting the metrics system might cause tests to hang	Major	.
HBASE-16150	Remove ConcurrentIndex	Major	.
HBASE-16207	can't restore snapshot without "Admin" permission	Major	master, snapshots
HBASE-16184	Shell test fails due to rLoadSink being nil	Major	.
HBASE-16055	PutSortReducer loses any Visibility/acl attribute set on the Puts	Critical	security
HBASE-16081	Replication remove_peer gets stuck and blocks WAL rolling	Blocker	regionserver, Replication
HBASE-16044	Fix 'hbase shell' output parsing in graceful_stop.sh	Critical	scripts, shell
HBASE-16160	Get the UnsupportedOperationException when using delegation token with encryption	Blocker	.
HBASE-16074	ITBLL fails, reports lost big or tiny families	Blocker	integration tests
HBASE-16201	NPE in RpcServer causing intermittent UT failure of TestMasterReplication#testHFileCyclicReplication	Major	.
HBASE-16171	Fix the potential problems in TestHCM.testConnectionCloseAllowsInterrupt	Major	.
HBASE-15925	compat-module maven variable not evaluated	Blocker	build
HBASE-16187	Fix typo in blog post for metrics2	Major	website
HBASE-16190	IntegrationTestDDLMasterFailover failed with IllegalArgumentException: n must be positive	Minor	.
HBASE-16182	Increase IntegrationTestRpcClient timeout	Major	.
HBASE-16157	The incorrect block cache count and size are caused by removing duplicate block key in the LruBlockCache	Trivial	.
HBASE-16177	In dev mode thrift server can't be run	Major	.
HBASE-16091	Canary takes lot more time when there are delete markers in the table	Major	canary
HBASE-16132	Scan does not return all the result when regionserver is busy	Major	Client
HBASE-16135	PeerClusterZnode under rs of removed peer may never be deleted	Major	Replication
HBASE-15844	We should respect hfile.block.index.cacheonwrite when write intermediate index Block	Major	.
HBASE-16159	OutOfMemory exception when using AsyncRpcClient with encryption to read rpc response	Major	.
HBASE-16125	RegionMover uses hardcoded, Unix-style tmp folder - breaks Windows	Major	.
HBASE-16133	RSGroupBasedLoadBalancer.retainAssignment() might miss a region	Major	.
HBASE-16129	check_compatibility.sh is broken when using Java API Compliance Checker v1.7	Major	test
HBASE-15976	RegionServerMetricsWrapperRunnable will be failure when disable blockcache.	Major	.
HBASE-16122	PerformanceEvaluation should provide user friendly hint when client threads argument is missing	Minor	.
HBASE-16069	Typo "trapsparently" in item 3 of chapter 87.2 of Reference Guide	Minor	documentation
HBASE-16109	Add Interface audience annotation to a few classes	Minor	.
HBASE-16111	Truncate preserve shell command is broken	Major	shell
HBASE-16103	Procedure v2 - TestCloneSnapshotProcedure relies on execution order	Minor	proc-v2, test
HBASE-16040	Remove configuration "hbase.replication"	Major	.
HBASE-16070	Mapreduce Serialization classes do not have Interface audience	Major	.
HBASE-16012	Major compaction can't work due to obsolete scanner read point in RegionServer	Major	Compaction, Scanners
HBASE-16062	Improper error handling in WAL Reader/Writer creation	Major	.
HBASE-16032	Possible memory leak in StoreScanner	Major	.
HBASE-16035	Nested AutoCloseables might not all get closed	Major	.
HBASE-15783	AccessControlConstants#OP_ATTRIBUTE_ACL_STRATEGY_CELL_FIRST not used any more.	Major	.
HBASE-16059	Region normalizer fails to trigger merge action where one of the regions is empty	Major	master
HBASE-14485	ConnectionImplementation leaks on construction failure	Major	Client
HBASE-16054	OutOfMemory exception when using AsyncRpcClient with encryption	Major	.
HBASE-16066	Resolve RpC_REPEATED_CONDITIONAL_TEST findbugs warnings in HMaster	Major	.
HBASE-16058	TestHRegion fails on 1.4 builds	Major	test
HBASE-15467	Remove 1.x/2.0 TableDescriptor incompatibility	Major	master, regionserver
HBASE-16061	Allow logging to a buffered console	Major	.
HBASE-16053	Master code is not setting the table in ENABLING state in create table	Major	.
HBASE-16045	endtime argument for VerifyReplication was incorrectly specified in usage	Major	.
HBASE-15977	Failed variable substitution on home page	Major	website
HBASE-16047	TestFastFail is broken again	Major	test
HBASE-15908	Checksum verification is broken due to incorrect passing of ByteBuffers in DataChecksum	Blocker	HFile
HBASE-16031	Documents about "hbase.replication" default value seems wrong	Major	documentation
HBASE-16017	HBase TableOutputFormat has connection leak in getRecordWriter	Major	mapreduce
HBASE-15746	Remove extra RegionCoprocessor preClose() in RSRpcServices#closeRegion	Minor	Coprocessors, regionserver
HBASE-16021	graceful_stop.sh: Wrap variables in double quote to avoid "[: too many arguments" error	Minor	scripts
HBASE-16016	AssignmentManager#waitForAssignment could have unexpected negative deadline	Major	.
HBASE-16007	Job's Configuration should be passed to TableMapReduceUtil#addDependencyJars() in WALPlayer	Major	.
HBASE-14644	Region in transition metric is broken	Major	.
HBASE-15946	Eliminate possible security concerns in RS web UI's store file metrics	Major	.
HBASE-15990	The priority value of subsequent coprocessors in the Coprocessor.Priority.SYSTEM list are not incremented by one	Minor	.
HBASE-15952	Bulk load data replication is not working when RS user does not have permission on hfile-refs node	Major	Replication
HBASE-15975	logic in TestHTableDescriptor#testAddCoprocessorWithSpecStr is wrong	Trivial	test
HBASE-15959	Fix flaky test TestRegionServerMetrics.testMobMetrics	Major	.
HBASE-15957	RpcClientImpl.close never ends in some circumstances	Major	Client, rpc
HBASE-15803	ZooKeeperWatcher's constructor can leak a ZooKeeper instance with throwing ZooKeeperConnectionException when canCreateBaseZNode is true	Minor	.
HBASE-15698	Increment TimeRange not serialized to server	Blocker	.
HBASE-15965	Shell test changes. Use @shell.command instead directly calling functions in admin.rb and other libraries.	Major	.
HBASE-15954	REST server should log requests with TRACE instead of DEBUG	Major	.
HBASE-15889	String case conversions are locale-sensitive, used without locale	Minor	localization
HBASE-15955	Disable action in CatalogJanitor#setEnabled should wait for active cleanup scan to finish	Major	master
HBASE-15929	There are two classes with name TestRegionServerMetrics	Major	.
HBASE-15845	Shell Cleanup : move formatter to commands.rb; move one of the two hbase.rb to hbase_constants.rb	Minor	shell
HBASE-15933	NullPointerException may be thrown from SimpleRegionNormalizer#getRegionSize()	Major	.
HBASE-15938	submit-patch.py: Don't crash if there are tests with same name. Refactor: Split out html template to separate file.	Major	.
HBASE-15944	Spark test flooding mvn output. Redirect test logs to file.	Major	.
HBASE-15858	Some region server group shell commands don't work	Major	.
HBASE-15932	Shell test fails due to uninitialized constant	Major	.
HBASE-15907	Missing documentation of create table split options	Major	documentation
HBASE-15918	Cleanup excludes/includes file after use in hbase-personality.sh to avoid asf license error.	Major	.
HBASE-15897	Fix a wrong comment about QOS order	Trivial	.
HBASE-15909	Use Yetus' patch naming rules in submit-patch.py	Major	.
HBASE-15912	REST module has 2 extant results in findbugs	Major	.
HBASE-15891	Closeable resources potentially not getting closed if exception is thrown	Minor	.
HBASE-15693	Reconsider the ImportOrder rule of checkstyle	Major	build
HBASE-11625	Reading datablock throws "Invalid HFile block magic" and can not switch to hdfs checksum	Major	HFile
HBASE-15830	Sasl encryption doesn't work with AsyncRpcChannelImpl	Major	.
HBASE-15884	NPE in StoreFileScanner#skipKVsNewerThanReadpoint during reverse scan	Major	Scanners
HBASE-15880	RpcClientImpl#tracedWriteRequest incorrectly closes HTrace span	Major	tracing
HBASE-14818	user_permission does not list namespace permissions	Minor	hbase
HBASE-15856	Cached Connection instances can wind up with addresses never resolved	Critical	Client
HBASE-15863	Typo in Put.java class documentation	Trivial	documentation, java
HBASE-15465	userPermission returned by getUserPermission() for the selected namespace does not have namespace set	Minor	Protobufs
HBASE-15617	Canary in regionserver mode might not enumerate all regionservers	Minor	.
HBASE-15850	Localize the configuration change in testCheckTableLocks to reduce flakiness of TestHBaseFsck test suite	Major	hbck
HBASE-15841	Performance Evaluation tool total rows may not be set correctly	Minor	.
HBASE-15824	LocalHBaseCluster gets bind exception in master info port	Major	.
HBASE-15784	Misuse core/maxPoolSize of LinkedBlockingQueue in ThreadPoolExecutor	Major	Client, Replication, Thrift
HBASE-15834	Correct Bloom filter documentation in section 96.4 of Reference Guide	Minor	documentation
HBASE-15769	Perform validation on cluster key for add_peer	Minor	.
HBASE-15848	Fix possible null point dereference in RSGroupBasedLoadBalancer#getMisplacedRegions()	Trivial	regionserver
HBASE-15840	WAL.proto compilation broken for cpp	Major	.
HBASE-15725	make_patch.sh should add the branch name when -b is passed.	Major	tooling
HBASE-15828	fix extant findbug	Major	findbugs
HBASE-15615	Wrong sleep time when RegionServerCallable need retry	Major	Client
HBASE-15811	Batch Get after batch Put does not fetch all Cells	Blocker	Client
HBASE-15742	Reduce allocation of objects in metrics	Major	.
HBASE-15799	Two Shell 'close_region' Example Syntaxes Don't Work	Minor	shell
HBASE-15801	Upgrade checkstyle for all branches	Major	build
HBASE-15797	TestIPCUtil fails after HBASE-15795	Major	.
HBASE-15236	Inconsistent cell reads over multiple bulk-loaded HFiles	Major	.
HBASE-15807	Update report-flakies.py to look for "FAILED" status in test report	Minor	.
HBASE-15738	Ensure artifacts in project dist area include required md5 file	Blocker	build, community
HBASE-15796	TestMetaCache fails after HBASE-15745	Major	.
HBASE-15781	Remove unused TableEventHandler and TotesHRegionInfo	Trivial	master
HBASE-15782	TestShell fails due to some moved types	Major	.
HBASE-15669	HFile size is not considered correctly in a replication request	Major	Replication
HBASE-15292	Refined ZooKeeperWatcher to prevent ZooKeeper's callback while construction	Minor	Zookeeper
HBASE-15563	'counter' may overflow in BoundedGroupingStrategy	Minor	wal
HBASE-15755	SnapshotDescriptionUtils and SnapshotTestingUtils do not have any Interface audience marked	Major	.
HBASE-15741	Provide backward compatibility for HBase coprocessor service names	Blocker	Coprocessors
HBASE-15613	TestNamespaceCommand times out	Major	.
HBASE-15528	Clean up outdated entries in hbase-default.xml	Minor	.
HBASE-15752	ClassNotFoundException is encountered when custom WAL codec is not found in WALPlayer job	Major	.
HBASE-15714	We are calling checkRow() twice in doMiniBatchMutation()	Major	regionserver
HBASE-15703	Deadline scheduler needs to return to the client info about skipped calls, not just drop them	Critical	IPC/RPC
HBASE-15357	TableInputFormatBase getSplitKey does not handle signed bytes correctly	Major	mapreduce
HBASE-15711	Add client side property to allow logging details for batch errors	Major	.
HBASE-15732	hbase-rsgroups should be in the assembly	Major	.
HBASE-15676	FuzzyRowFilter fails and matches all the rows in the table if the mask consists of all 0s	Major	Filters
HBASE-15697	Excessive TestHRegion running time on branch-1	Major	.
HBASE-15685	Typo in REST documentation	Minor	documentation
HBASE-15708	Docker for dev-support scripts	Major	.
HBASE-15707	ImportTSV bulk output does not support tags with hfile.format.version=3	Major	mapreduce
HBASE-15645	hbase.rpc.timeout is not used in operations of HTable	Critical	.
HBASE-15634	TestDateTieredCompactionPolicy#negativeForMajor is flaky	Major	test
HBASE-15710	Include issue servers information in RetriesExhaustedWithDetailsException message	Minor	.
HBASE-14252	RegionServers fail to start when setting hbase.ipc.server.callqueue.scan.ratio to 0	Major	regionserver
HBASE-15699	Can not sync AsyncFSWAL if no edit is appended	Major	wal
HBASE-15360	Fix flaky TestSimpleRpcScheduler	Critical	test
HBASE-15670	Add missing Snapshot.proto to the maven profile for compiling protobuf	Major	.
HBASE-15674	HRegionLocator#getAllRegionLocations should put the results in cache	Major	.
HBASE-15672	hadoop.hbase.security.visibility.TestVisibilityLabelsWithDeletes fails	Major	test
HBASE-15673	[PE tool] Fix latency metrics for multiGet	Major	Performance
HBASE-14898	Correct Bloom filter documentation in the book	Minor	.
HBASE-15664	Use Long.MAX_VALUE instead of HConstants.FOREVER in CompactionPolicy	Major	Compaction
HBASE-15668	HFileReplicator$Copier fails to replicate other hfiles in the request when a hfile in not found in FS anywhere	Trivial	Replication
HBASE-15287	mapreduce.RowCounter returns incorrect result with binary row key inputs	Major	mapreduce, util
HBASE-15187	Integrate CSRF prevention filter to REST gateway	Major	.
HBASE-15650	Remove TimeRangeTracker as point of contention when many threads reading a StoreFile	Major	Performance
HBASE-15622	Superusers does not consider the keytab credentials	Critical	security
HBASE-15405	Synchronize final results logging single thread in PE, fix wrong defaults in help message	Minor	Performance
HBASE-15504	Fix Balancer in 1.3 not moving regions off overloaded regionserver	Major	.
HBASE-15637	TSHA Thrift-2 server should allow limiting call queue size	Major	Thrift
HBASE-15639	Unguarded access to stackIndexes in Procedure#toStringDetails()	Minor	.
HBASE-15636	hard coded wait time out value in HBaseTestingUtility#waitUntilAllRegionsAssigned might cause test failure	Minor	integration tests, test
HBASE-15621	Suppress Hbase SnapshotHFile cleaner error messages when a snaphot is going on	Minor	snapshots
HBASE-15627	Miss space and closing quote in AccessController#checkSystemOrSuperUser	Minor	security
HBASE-15093	Replication can report incorrect size of log queue for the global source when multiwal is enabled	Minor	Replication
HBASE-15591	ServerCrashProcedure not yielding	Major	.
HBASE-15623	Update refguide to change hadoop <= 2.3.x from NT to X for hbase-1.2.x	Major	documentation
HBASE-15587	FSTableDescriptors.getDescriptor() logs stack trace erronously	Major	.
HBASE-15485	Filter.reset() should not be called between batches	Major	.
HBASE-15578	Handle HBASE-15234 for ReplicationHFileCleaner	Major	Replication
HBASE-15582	SnapshotManifestV1 too verbose when there are no regions	Trivial	master, snapshots
HBASE-15424	Add bulk load hfile-refs for replication in ZK after the event is appended in the WAL	Minor	Replication
HBASE-15234	ReplicationLogCleaner can abort due to transient ZK issues	Critical	master, Replication
HBASE-15567	TestReplicationShell broken by recent replication changes	Minor	Replication, shell
HBASE-15324	Jitter may cause desiredMaxFileSize overflow in ConstantSizeRegionSplitPolicy and trigger unexpected split	Major	.
HBASE-15566	Add timeouts on TestMobFlushSnapshotFromClient and TestRegionMergeTransactionOnCluster	Major	.
HBASE-15559	BaseMasterAndRegionObserver doesn't implement all the methods	Major	.
HBASE-15327	Canary will always invoke admin.balancer() in each sniffing period when writeSniffing is enabled	Minor	canary
HBASE-15295	MutateTableAccess.multiMutate() does not get high priority causing a deadlock	Major	.
HBASE-15515	Improve LocalityBasedCandidateGenerator in Balancer	Minor	.
HBASE-14256	Flush task message may be confusing when region is recovered	Major	regionserver
HBASE-15520	Fix broken TestAsyncIPC	Major	.
HBASE-15064	BufferUnderflowException after last Cell fetched from an HFile Block served from L2 offheap cache	Critical	io
HBASE-15325	ResultScanner allowing partial result will miss the rest of the row if the region is moved between two rpc requests	Critical	dataloss, Scanners
HBASE-15433	SnapshotManager#restoreSnapshot not update table and region count quota correctly when encountering exception	Major	snapshots
HBASE-15441	Fix WAL splitting when region has moved multiple times	Blocker	Recovery, wal
HBASE-15430	Failed taking snapshot - Manifest proto-message too large	Critical	snapshots
HBASE-15463	Region normalizer should check whether split/merge is enabled	Minor	.
HBASE-15439	getMaximumAllowedTimeBetweenRuns in ScheduledChore ignores the TimeUnit	Major	master, mob, regionserver
HBASE-15379	Fake cells created in read path not implementing SettableSequenceId	Major	.
HBASE-15425	Failing to write bulk load event marker in the WAL is ignored	Major	.
HBASE-15378	Scanner cannot handle heartbeat message with no results	Critical	dataloss, Scanners
HBASE-15271	Spark Bulk Load: Need to write HFiles to tmp location then rename to protect from Spark Executor Failures	Major	.
HBASE-15364	Fix unescaped < characters in Javadoc	Major	API, documentation
HBASE-15137	CallTimeoutException and CallQueueTooBigException should trigger PFFE	Major	.
HBASE-15393	Enable table replication command will fail when parent znode is not default in peer cluster	Major	Replication
HBASE-15397	Create bulk load replication znode(hfile-refs) in ZK replication queue by default	Major	Replication
HBASE-15329	Cross-Site Scripting: Reflected in table.jsp	Minor	security, UI
HBASE-15128	Disable region splits and merges switch in master	Major	.
HBASE-15358	canEnforceTimeLimitFromScope should use timeScope instead of sizeScope	Major	Scanners
HBASE-15332	Document how to take advantage of HDFS-6133 in HBase	Major	documentation
HBASE-15319	clearJmxCache does not take effect actually	Major	metrics
HBASE-15247	InclusiveStopFilter does not respect reverse Filter property	Major	Filters
HBASE-15285	Forward-port respect for isReturnResult from HBASE-15095	Major	Client
HBASE-15298	Fix missing or wrong asciidoc anchors in the reference guide	Minor	documentation
HBASE-15259	WALEdits under replay will also be replicated	Minor	.
HBASE-15251	During a cluster restart, Hmaster thinks it is a failover by mistake	Major	master
HBASE-15289	Add details about how to get usage instructions for Import and Export utilities	Major	documentation
HBASE-13883	Fix Memstore Flush section in HBase book	Major	documentation
HBASE-15250	Fix links that are currently redirected from old URLs	Major	documentation, website
HBASE-15279	OrderedBytes.isEncodedValue does not check for int8 and int16 types	Major	.
HBASE-15276	TestFlushSnapshotFromClient hung	Major	.
HBASE-15198	RPC client not using Codec and CellBlock for puts by default	Critical	.
HBASE-15122	Servlets generate XSS_REQUEST_PARAMETER_TO_SERVLET_WRITER findbugs warnings	Critical	UI
HBASE-15079	TestMultiParallel.validateLoadedData AssertionError: null	Major	Client, flakey, test
HBASE-13839	Fix AssgnmentManagerTmpl.jamon issues (coloring, content etc.)	Major	master, UI
HBASE-15252	Data loss when replaying wal if HDFS timeout	Blocker	wal
HBASE-15221	HTableMultiplexer improvements (stale region locations and resource leaks)	Critical	Client
HBASE-15253	Small bug in CellUtil.matchingRow(Cell, byte[])	Minor	.
HBASE-14192	Fix REST Cluster constructor with String List	Minor	REST
HBASE-15216	Canary does not accept config params from command line	Major	canary
HBASE-15231	Make TableState.State private	Major	API
HBASE-15214	Valid mutate Ops fail with RPC Codec in use and region moves across	Critical	.
HBASE-14770	RowCounter argument input parse error	Minor	mapreduce
HBASE-15209	disable table in HBaseTestingUtility.truncateTable	Minor	.
HBASE-15218	On RS crash and replay of WAL, loosing all Tags in Cells	Blocker	Recovery, regionserver, security
HBASE-15200	ZooKeeper znode ACL checks should only compare the shortname	Minor	security
HBASE-15206	Flakey testSplitDaughtersNotInMeta test	Minor	flakey
HBASE-15196	HBASE-15158 Preamble 2 of 2:Add Increment tests	Major	.
HBASE-15186	HBASE-15158 Preamble 1 of 2: fix findbugs, add javadoc, change Region#getReadpoint to #getReadPoint, and some util	Major	.
HBASE-15190	Monkey dies when running on shared cluster (gives up when can't kill the other fellows processes)	Major	integration tests
HBASE-15195	Don't run findbugs on hbase-it; it has nothing in src/main/java	Major	findbugs
HBASE-14810	Update Hadoop support description to explain "not tested" vs "not supported"	Critical	documentation
HBASE-15019	Replication stuck when HDFS is restarted	Major	Replication, wal
HBASE-15173	Execute mergeRegions RPC call as the request user	Minor	.
HBASE-15146	Don't block on Reader threads queueing to a scheduler queue	Blocker	.
HBASE-15145	HBCK and Replication should authenticate to zookepeer using server principal	Major	.
HBASE-15164	Fix broken links found via LinkLint	Major	documentation
HBASE-15132	Master region merge RPC should authorize user request	Major	.
HBASE-13082	Coarsen StoreScanner locks to RegionScanner	Major	Performance, Scanners
HBASE-15148	Resolve IS2_INCONSISTENT_SYNC findbugs warning in AuthenticationTokenSecretManager	Major	.
HBASE-15133	Data loss after compaction when a row has more than Integer.MAX_VALUE columns	Major	Compaction
HBASE-15152	Automatically include prefix-tree module in MR jobs if present	Major	mapreduce
HBASE-15147	Shell should use Admin.listTableNames() instead of Admin.listTables()	Major	.
HBASE-15126	HBaseFsck's checkRegionBoundaries function sets incorrect 'storesFirstKey'	Major	hbck
HBASE-15139	Connection manager doesn't pass client metrics to RpcClient	Major	Client, metrics
HBASE-15098	Normalizer switch in configuration is not used	Blocker	master
HBASE-15101	Leaked References to StoreFile.Reader after HBASE-13082	Critical	HFile, io
HBASE-15102	HeapMemoryTuner can "overtune" memstore size and suddenly drop it into blocking zone	Critical	regionserver
HBASE-14771	RpcServer#getRemoteAddress always returns null	Minor	IPC/RPC
HBASE-14512	Cache UGI groups	Major	Performance, security
HBASE-15104	Occasional failures due to NotServingRegionException in IT tests	Major	integration tests
HBASE-15117	Resolve ICAST findbugs warnings in current codes	Minor	.
HBASE-15085	IllegalStateException was thrown when scanning on bulkloaded HFiles	Critical	.
HBASE-15083	Gets from Multiactions are not counted in metrics for gets.	Major	.
HBASE-15052	Use EnvironmentEdgeManager in ReplicationSource	Trivial	Replication
HBASE-15057	local-master-backup.sh doesn't start HMaster correctly	Major	shell
HBASE-15065	SimpleRegionNormalizer should return multiple normalization plans in one run	Major	.
HBASE-14975	Don't color the total RIT line yellow if it's zero	Major	UI
HBASE-15027	Refactor the way the CompactedHFileDischarger threads are created	Major	.
HBASE-15070	DistributedHBaseCluster#restoreRegionServers() starts new RS process on master server	Minor	integration tests
HBASE-14867	SimpleRegionNormalizer needs to have better heuristics to trigger merge operation	Major	master
HBASE-14987	Compaction marker whose region name doesn't match current region's needs to be handled	Major	.
HBASE-15063	Bug in MultiByteBuf#toBytes	Critical	io, Performance
HBASE-15050	Block Ref counting does not work in Region Split cases.	Critical	.
HBASE-15011	turn off the jdk8 javadoc linter. :(	Blocker	build, documentation
HBASE-15043	region_status.rb broken with TypeError: no public constructors for Java::OrgApacheHadoopHbaseClient::HBaseAdmin	Major	scripts
HBASE-15026	The default value of "hbase.regions.slop" in hbase-default.xml is obsolete	Minor	Balancer
HBASE-15035	bulkloading hfiles with tags that require splits do not preserve tags	Blocker	HFile
HBASE-15039	HMaster and RegionServers should try to refresh token keys from zk when facing InvalidToken	Major	.
HBASE-14940	Make our unsafe based ops more safe	Major	.
HBASE-14717	enable_table_replication command should only create specified table for a peer cluster	Major	Replication
HBASE-15032	hbase shell scan filter string assumes UTF-8 encoding	Major	shell
HBASE-15034	IntegrationTestDDLMasterFailover does not clean created namespaces	Minor	integration tests
HBASE-15030	Deadlock in master TableNamespaceManager while running IntegrationTestDDLMasterFailover	Major	proc-v2
HBASE-15021	hadoopqa doing false positives	Major	.
HBASE-15028	Minor fix on RegionGroupingProvider	Minor	wal
HBASE-14977	ChoreService.shutdown may result in ConcurrentModificationException	Minor	util
HBASE-15014	Fix filterCellByStore in WALsplitter is awful for performance	Critical	MTTR, Recovery, wal
HBASE-15001	Thread Safety issues in ReplicationSinkManager and HBaseInterClusterReplicationEndpoint	Blocker	Replication
HBASE-14654	Reenable TestMultiParallel#testActiveThreadsCount	Major	test
HBASE-15022	undefined method `getZooKeeperClusterKey' for Java::OrgApacheHadoopHbaseZookeeper::ZKUtil:Class	Major	shell
HBASE-14991	Fix the feature warning in scala code	Minor	.
HBASE-15015	Checktyle plugin shouldn't check Jamon-generated Java classes	Minor	build
HBASE-14822	Renewing leases of scanners doesn't work	Major	.
HBASE-13907	Document how to deploy a coprocessor	Major	documentation
HBASE-14990	Tests in BaseTestHBaseFsck are run by its subclasses redundantly	Minor	test
HBASE-14999	Remove ref to org.mortbay.log.Log	Minor	dependencies
HBASE-15000	Fix javadoc warn in LoadIncrementalHFiles	Trivial	.
HBASE-14974	Total number of Regions in Transition number on UI incorrect	Trivial	UI
HBASE-14952	hbase-assembly source artifact has some incorrect modules	Blocker	build, dependencies
HBASE-14807	TestWALLockup is flakey	Major	flakey, test
HBASE-14843	TestWALProcedureStore.testLoad is flakey	Blocker	proc-v2
HBASE-14838	Clarify that SimpleRegionNormalizer does not merge empty (<1MB) regions	Trivial	documentation, regionserver
HBASE-13976	release manager list in ref guide is missing 0.94 line	Major	documentation
HBASE-14968	ConcurrentModificationException in region close resulting in the region staying in closing state	Major	Region Assignment, regionserver
HBASE-14929	There is a space missing from Table "foo" is not currently available.	Trivial	.
HBASE-14936	CombinedBlockCache should overwrite CacheStats#rollMetricsPeriod()	Major	BlockCache
HBASE-14701	Fix flakey Failed tests: TestMobFlushSnapshotFromClient>TestFlushSnapshotFromClient.testSkipFlushTableSnapshot:199 null	Major	test
HBASE-14953	HBaseInterClusterReplicationEndpoint: Do not retry the whole batch of edits in case of RejectedExecutionException	Critical	Replication
HBASE-14960	Fallback to using default RPCControllerFactory if class cannot be loaded	Major	.
HBASE-14769	Remove unused functions and duplicate javadocs from HBaseAdmin	Major	.
HBASE-14901	There is duplicated code to create/manage encryption keys	Minor	encryption
HBASE-14941	locate_region shell command	Trivial	shell
HBASE-14942	Allow turning off BoundedByteBufferPool	Major	.
HBASE-14954	IllegalArgumentException was thrown when doing online configuration change in CompactSplitThread	Major	Compaction, regionserver
HBASE-14804	HBase shell's create table command ignores 'NORMALIZATION_ENABLED' attribute	Minor	shell
HBASE-14917	Log in console if individual tests in test-patch.sh fail or pass	Minor	.
HBASE-14930	check_compatibility.sh needs smarter exit codes	Major	.
HBASE-14923	VerifyReplication should not mask the exception during result comparison	Minor	tooling
HBASE-14922	Delayed flush doesn't work causing flush storms.	Major	regionserver
HBASE-14926	Hung ThriftServer; no timeout on read from client; if client crashes, worker thread gets stuck reading	Major	Thrift
HBASE-14928	Start row should be set for query through HBase REST gateway involving globbing option	Major	REST
HBASE-14907	NPE of MobUtils.hasMobColumns in Build failed in Jenkins: HBase-Trunk_matrix » latest1.8,Hadoop #513	Major	mob
HBASE-14904	Mark Base[En|De]coder LimitedPrivate and fix binary compat issue	Major	.
HBASE-13857	Slow WAL Append count in ServerMetricsTmpl.jamon is hardcoded to zero	Major	regionserver, UI
HBASE-14905	VerifyReplication does not honour versions option	Major	tooling
HBASE-14541	TestHFileOutputFormat.testMRIncrementalLoadWithSplit failed due to too many splits and few retries	Major	HFile, test
HBASE-14462	rolling_restart.sh --master-only throws "line 142: test: 0: unary operator expected"	Major	.
HBASE-14896	Resolve Javadoc warnings in WALKey and RegionMover	Minor	.
HBASE-14531	graceful_stop.sh "if [ "$local" ]" condition unexpected behaviour	Major	scripts
HBASE-14890	Fix javadoc checkstyle errors	Major	.
HBASE-14894	Fix misspellings of threshold in log4j.properties files for tests	Trivial	.
HBASE-14523	rolling-restart.sh --graceful will start regionserver process on master node	Major	scripts
HBASE-14893	Race between mutation on region and region closing operation leads to NotServingRegionException	Major	.
HBASE-14664	Master failover issue: Backup master is unable to start if active master is killed and started in short time interval	Critical	master
HBASE-14777	Fix Inter Cluster Replication Future ordering issues	Critical	Replication
HBASE-14885	NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor	Major	master
HBASE-14689	Addendum and unit test for HBASE-13471	Major	.
HBASE-14463	Severe performance downgrade when parallel reading a single key from BucketCache	Major	.
HBASE-14861	HBASE_ZNODE_FILE on master server is overwritten by regionserver process in case of master-rs collocation	Major	Operability
HBASE-14825	HBase Ref Guide corrections of typos/misspellings	Minor	documentation
HBASE-14737	Clear cachedMaxVersions when HColumnDescriptor#setValue(VERSIONS, value) is called	Major	.
HBASE-14799	Commons-collections object deserialization remote command execution vulnerability	Critical	dependencies, security
HBASE-14840	Sink cluster reports data replication request as success though the data is not replicated	Major	Replication
HBASE-14712	MasterProcWALs never clean up	Blocker	proc-v2
HBASE-14761	Deletes with and without visibility expression do not delete the matching mutation	Major	security
HBASE-14782	FuzzyRowFilter skips valid rows	Major	Filters
HBASE-14824	HBaseAdmin.mergeRegions should recognize both full region names and encoded region names	Minor	Admin
HBASE-14815	TestMobExportSnapshot.testExportFailure timeout occasionally	Major	.
HBASE-14823	HBase Ref Guide Refactoring	Major	documentation
HBASE-14812	Fix ResultBoundedCompletionService deadlock	Major	Client, Thrift
HBASE-14793	Allow limiting size of block into L1 block cache.	Major	BlockCache
HBASE-14806	Missing sources.jar for several modules when building HBase	Major	pom
HBASE-14809	Grant / revoke Namespace admin permission to group	Major	security
HBASE-14802	Replaying server crash recovery procedure after a failover causes incorrect handling of deadservers	Major	master
HBASE-13982	Add info for visibility labels/cell TTLs to ImportTsv	Major	mapreduce
HBASE-14797	Last round of CSS fix-ups	Major	website
HBASE-14788	Splitting a region does not support the hbase.rs.evictblocksonclose config when closing source region	Major	regionserver
HBASE-14778	Make block cache hit percentages not integer in the metrics system	Major	BlockCache, metrics
HBASE-14784	Port conflict is not resolved in HBaseTestingUtility.randomFreePort()	Minor	test
HBASE-14787	Remove obsolete ConnectionImplementation.refCount	Trivial	.
HBASE-14781	Turn per cf flushing on for ITBLL by default	Major	integration tests
HBASE-14774	Raise the font size on high-DPI small-screen devices like iphone 6+	Major	website
HBASE-14767	Remove deprecated functions from HBaseAdmin	Major	.
HBASE-14759	Avoid using Math.abs when selecting SyncRunner in FSHLog	Major	wal
HBASE-14632	Region server aborts due to unguarded dereference of Reader	Major	regionserver
HBASE-14706	RegionLocationFinder should return multiple servernames by top host	Major	Balancer
HBASE-14755	Fix some broken links and HTML problems	Major	documentation
HBASE-14773	Fix HBase shell tests are skipped when skipping server tests.	Major	test
HBASE-14768	bin/graceful_stop.sh logs nothing as a balancer state to be stored	Trivial	scripts
HBASE-14723	Fix IT tests split too many times	Major	integration tests
HBASE-14733	Minor typo in alter_namespace.rb	Trivial	shell
HBASE-14754	TestFastFailWithoutTestUtil failing on trunk now in #testPreemptiveFastFailException50Times	Major	flakey, test
HBASE-14751	Book seems to be broken	Major	.
HBASE-14742	TestHeapMemoryManager is flakey	Major	test
HBASE-14739	Fix broken link to Javadoc that is suppressed because it is generated code	Trivial	documentation
HBASE-14532	[book] dfs.client.read.shortcircuit is referenced as hbase-site.xml config and not described in section 7	Minor	documentation
HBASE-14711	Remove or annotated deprecated methods in HRegionInfo	Major	hbase
HBASE-14557	MapReduce WALPlayer issue with NoTagsKeyValue	Blocker	tooling
HBASE-14650	Reenable TestNamespaceAuditor	Major	.
HBASE-14660	AssertionError found when using offheap BucketCache with assertion enabled	Major	.
HBASE-14695	Fix some easy HTML warnings	Minor	documentation
HBASE-14425	In Secure Zookeeper cluster superuser will not have sufficient permission if multiple values are configured in "hbase.superuser"	Major	security, Zookeeper
HBASE-14674	Rpc handler / task monitoring seems to be broken after 0.98	Major	.
HBASE-14705	Javadoc for KeyValue constructor is not correct.	Minor	.
HBASE-14680	Two configs for snapshot timeout and better defaults	Major	snapshots
HBASE-14349	pre-commit zombie finder is overly broad	Critical	build
HBASE-14694	Scan copy constructor doesn't handle allowPartialResults	Major	Client
HBASE-14257	Periodic flusher only handles hbase:meta, not other system tables	Major	regionserver
HBASE-14682	CM restore functionality for regionservers is broken	Major	integration tests
HBASE-14283	Reverse scan doesn’t work with HFile inline index/bloom blocks	Major	.
HBASE-13318	RpcServer.getListenerAddress should handle when the accept channel is closed	Minor	.
HBASE-14661	RegionServer link is not opening, in HBase Table page.	Minor	UI
HBASE-14690	Fix css so there's no left/right scroll bar	Major	UI
HBASE-14624	BucketCache.freeBlock is too expensive	Major	BlockCache
HBASE-14676	HBaseTestCase clean out: Purge Incommon Interface and Table and Region implementations	Major	.
HBASE-14343	Fix debug message in SimpleRegionNormalizer for small regions	Trivial	regionserver
HBASE-14681	Upgrade Checkstyle plugin to 2.16	Major	build
HBASE-14667	HBaseFsck constructors have diverged	Minor	hbck
HBASE-14658	Allow loading a MonkeyFactory by class name	Major	integration tests, test
HBASE-14603	Lots of work on the POM to enhance Javadocs, Xrefs	Major	documentation
HBASE-14326	HBase book: fix definition of max min size to compact	Major	documentation
HBASE-14663	HStore::close does not honor config hbase.rs.evictblocksonclose	Minor	BlockCache, regionserver
HBASE-14427	Fix 'should' assertions in TestFastFail	Minor	test
HBASE-14633	Try fluid width UI	Major	UI
HBASE-14366	NPE in case visibility expression is not present in labels table during importtsv run	Minor	.
HBASE-14604	Improve MoveCostFunction in StochasticLoadBalancer	Major	Balancer
HBASE-14606	TestSecureLoadIncrementalHFiles tests timed out in trunk build on apache	Major	test
HBASE-12558	Disable TestHCM.testClusterStatus Unexpected exception, expected<org.apache.hadoop.hbase.regionserver.RegionServerStoppedException> but was<junit.framework.AssertionFailedError>	Major	test
HBASE-14458	AsyncRpcClient#createRpcChannel() should check and remove dead channel before creating new one to same server	Critical	IPC/RPC
HBASE-14634	Disable flakey TestSnapshotCloneIndependence.testOnlineSnapshotDeleteIndependent	Major	test
HBASE-14621	ReplicationLogCleaner gets stuck when a regionserver crashes	Critical	Replication
HBASE-14625	Chaos Monkey should shut down faster	Major	integration tests, test
HBASE-14597	Fix Groups cache in multi-threaded env	Major	.
HBASE-14474	DeadLock in RpcClientImpl.Connection.close()	Blocker	IPC/RPC
HBASE-14594	Use new DNS API introduced in HADOOP-12437	Major	util
HBASE-14521	Unify the semantic of hbase.client.retries.number	Major	.
HBASE-14608	testWalRollOnLowReplication has some risk to assert failed after HBASE-14600	Major	test
HBASE-14598	ByteBufferOutputStream grows its HeapByteBuffer beyond JVM limitations	Major	Client, io
HBASE-14591	Region with reference hfile may split after a forced split in IncreasingToUpperBoundRegionSplitPolicy	Critical	regionserver
HBASE-14599	Modify site config to use protocol-relative URLs for CSS/JS	Blocker	documentation
HBASE-14501	NPE in replication when HDFS transparent encryption is enabled.	Critical	Replication, security
HBASE-14211	Add more rigorous integration tests of splits	Major	integration tests, test
HBASE-14592	BatchRestartRsAction always restarts 0 RS when running SlowDeterministicMonkey	Major	integration tests
HBASE-14577	HBase shell help for scan and returning a column family has a typo	Trivial	shell
HBASE-14578	URISyntaxException during snapshot restore for table with user defined namespace	Major	snapshots
HBASE-14581	Znode cleanup throws auth exception in secure mode	Major	security, Zookeeper
HBASE-13858	RS/MasterDumpServlet dumps threads before its “Stacks” header	Trivial	master, regionserver, UI
HBASE-14525	Append and increment operation throws NullPointerException on non-existing column families.	Minor	shell
HBASE-14497	Reverse Scan threw StackOverflow caused by readPt checking	Major	.
HBASE-14346	Typo in FamilyFilter	Trivial	documentation
HBASE-12983	HBase book mentions hadoop.ssl.enabled when it should be hbase.ssl.enabled	Major	documentation
HBASE-12615	Document GC conserving guidelines for contributors	Major	documentation
HBASE-14555	Deadlock in MVCC branch-1.2 toString()	Critical	regionserver
HBASE-14347	Add a switch to DynamicClassLoader to disable it	Major	Client, defaults, regionserver
HBASE-14544	Allow HConnectionImpl to not refresh the dns on errors	Major	Client
HBASE-14367	Add normalization support to shell	Major	Balancer, shell
HBASE-14545	TestMasterFailover often times out	Major	test
HBASE-14499	Master coprocessors shutdown will not happen on master abort	Major	master
HBASE-13770	Programmatic JAAS configuration option for secure zookeeper may be broken	Major	Operability, security
HBASE-14292	Call Me Maybe HBase links haved moved	Minor	documentation
HBASE-13744	TestCorruptedRegionStoreFile is flaky	Major	test
HBASE-13143	TestCacheOnWrite is flaky and needs a diet	Critical	test
HBASE-14475	Region split requests are always audited with "hbase" user rather than request user	Major	regionserver, security
HBASE-14494	Wrong usage messages on shell commands	Minor	shell
HBASE-14518	Give TestScanEarlyTermination the same treatment as 'HBASE-14378 Get TestAccessController* passing again...' -- up priority handlers	Major	test
HBASE-14394	Properly close the connection after reading records from table.	Minor	mapreduce
HBASE-14510	Can not set coprocessor from Shell after HBASE-14224	Major	Coprocessors, shell
HBASE-14362	org.apache.hadoop.hbase.master.procedure.TestWALProcedureStoreOnHDFS is super duper flaky	Critical	test
HBASE-14473	Compute region locality in parallel	Major	Balancer
HBASE-14437	ArithmeticException in ReplicationInterClusterEndpoint	Minor	Replication
HBASE-14500	Remove load of deprecated MOB ruby scripts after HBASE-14227	Major	shell
HBASE-14489	postScannerFilterRow consumes a lot of CPU	Major	Coprocessors, Performance
HBASE-14370	Use separate thread for calling ZKPermissionWatcher#refreshNodes()	Major	.
HBASE-14492	Increase REST server header buffer size from 8k to 64k	Major	REST
HBASE-14471	Thrift - HTTP Error 413 full HEAD if using kerberos authentication	Major	Thrift
HBASE-14469	Fix some comment, validation and logging around memstore lower limit configuration	Minor	.
HBASE-14486	Disable TestRegionPlacement, a flakey test for an unfinished feature	Major	test
HBASE-13324	o.a.h.h.Coprocessor should be LimitedPrivate("Coprocessor")	Minor	API
HBASE-14445	ExportSnapshot does not honor -chmod option	Major	snapshots
HBASE-14338	License notification misspells 'Asciidoctor'	Minor	.
HBASE-14280	Bulk Upload from HA cluster to remote HA hbase cluster fails	Minor	hadoop2, regionserver
HBASE-14431	AsyncRpcClient#removeConnection() never removes connection from connections pool if server fails	Critical	IPC/RPC
HBASE-14449	Rewrite deadlock prevention for concurrent connection close	Major	master, metrics
HBASE-13250	chown of ExportSnapshot does not cover all path and files	Critical	snapshots
HBASE-14411	Fix unit test failures when using multiwal as default WAL provider	Major	.
HBASE-14429	Checkstyle report is broken	Minor	scripts
HBASE-14400	Fix HBase RPC protection documentation	Critical	encryption, IPC/RPC, security
HBASE-14145	Allow the Canary in regionserver mode to try all regions on the server, not just one	Major	canary, util
HBASE-14380	Correct data gets skipped along with bad data in importTsv bulk load thru TsvImporterTextMapper	Major	mapreduce, tooling
HBASE-14307	Incorrect use of positional read api in HFileBlock	Major	io
HBASE-14392	[tests] TestLogRollingNoCluster fails on master from time to time	Major	test
HBASE-14382	TestInterfaceAudienceAnnotations should hadoop-compt module resources	Minor	test
HBASE-14385	Close the sockets that is missing in connection closure.	Minor	Client
HBASE-14393	Have TestHFileEncryption clean up after itself so it don't go all zombie on us	Major	test
HBASE-14384	Trying to run canary locally with -regionserver option causes exception	Major	canary
HBASE-14317	Stuck FSHLog: bad disk (HDFS-8960) and can't roll WAL	Blocker	wal
HBASE-14327	TestIOFencing#testFencingAroundCompactionAfterWALSync is flaky	Critical	test
HBASE-14359	HTable#close will hang forever if unchecked error/exception thrown in AsyncProcess#sendMultiAction	Major	Client
HBASE-14229	Flushing canceled by coprocessor still leads to memstoreSize set down	Major	regionserver
HBASE-14337	build error on master	Major	.
HBASE-14354	Minor improvements for usage of the mlock agent	Trivial	hbase, regionserver
HBASE-13221	HDFS Transparent Encryption breaks WAL writing in Hadoop 2.6.0	Critical	documentation, wal
HBASE-14258	Make region_mover.rb script case insensitive with regard to hostname	Minor	.
HBASE-14315	Save one call to KeyValueHeap.peek per row	Major	.
HBASE-14313	After a Connection sees ConnectionClosingException it never recovers	Critical	Client
HBASE-13339	Update default Hadoop version to latest for master	Blocker	build
HBASE-14269	FuzzyRowFilter omits certain rows when multiple fuzzy keys exist	Major	Filters
HBASE-14302	TableSnapshotInputFormat should not create back references when restoring snapshot	Major	.
HBASE-14224	Fix coprocessor handling of duplicate classes	Critical	Coprocessors
HBASE-13480	ShortCircuitConnection doesn't short-circuit all calls as expected	Critical	Client
HBASE-14273	Rename MVCC to MVCC: From MultiVersionConsistencyControl to MultiVersionConcurrencyControl	Major	regionserver
HBASE-14291	NPE On StochasticLoadBalancer Balance Involving RS With No Regions	Minor	Balancer
HBASE-14250	branch-1.1 hbase-server test-jar has incorrect LICENSE	Blocker	build
HBASE-14251	javadoc jars use LICENSE/NOTICE from primary artifact	Blocker	build
HBASE-14249	shaded jar modules create spurious source and test jars with incorrect LICENSE/NOTICE info	Major	build
HBASE-14243	Incorrect NOTICE file in hbase-it test-jar	Blocker	build
HBASE-14234	Procedure-V2: Exception encountered in WALProcedureStore#rollWriter() should be properly handled	Minor	proc-v2
HBASE-14241	Fix deadlock during cluster shutdown due to concurrent connection close	Critical	master, metrics
HBASE-14228	Close BufferedMutator and connection in MultiTableOutputFormat	Minor	mapreduce
HBASE-14166	Per-Region metrics can be stale	Major	metrics
HBASE-10844	Coprocessor failure during batchmutation leaves the memstore datastructs in an inconsistent state	Major	regionserver
HBASE-13966	Limit column width in table.jsp	Minor	Operability, UI
HBASE-14219	src tgz no longer builds after HBASE-14085	Blocker	build
HBASE-14214	list_labels shouldn't raise ArgumentError if no labels are defined	Minor	.
HBASE-14054	Acknowledged writes may get lost if regionserver clock is set backwards	Major	regionserver
HBASE-14098	Allow dropping caches behind compactions	Major	Compaction, hadoop2, HFile
HBASE-14196	Thrift server idle connection timeout issue	Major	Thrift
HBASE-14209	TestShell visibility tests failing	Major	security, shell
HBASE-14201	hbck should not take a lock unless fixing errors	Major	hbck, util
HBASE-13889	Fix hbase-shaded-client artifact so it works on hbase-downstreamer	Critical	Client
HBASE-14208	Remove yarn dependencies on -common and -client	Major	build, Client
HBASE-14206	MultiRowRangeFilter returns records whose rowKeys are out of allowed ranges	Critical	Filters
HBASE-13062	Add documentation coverage for configuring dns server with thrift and rest gateways	Minor	documentation
HBASE-5878	Use getVisibleLength public api from HdfsDataInputStream from Hadoop-2.	Major	wal
HBASE-14092	hbck should run without locks by default and only disable the balancer when necessary	Major	hbck, util
HBASE-13924	Description for hbase.dynamic.jars.dir is wrong	Major	.
HBASE-12865	WALs may be deleted before they are replicated to peers	Critical	Replication
HBASE-13825	Use ProtobufUtil#mergeFrom and ProtobufUtil#mergeDelimitedFrom in place of builder methods of same name	Major	util
HBASE-13865	Increase the default value for hbase.hregion.memstore.block.multipler from 2 to 4 (part 2)	Trivial	regionserver
HBASE-14178	regionserver blocks because of waiting for offsetLock	Major	regionserver
HBASE-14183	[Shell] Scanning hbase meta table is failing in master branch	Major	shell
HBASE-14021	Quota table has a wrong description on the UI	Minor	UI
HBASE-14185	Incorrect region names logged by MemStoreFlusher	Minor	regionserver
HBASE-13864	HColumnDescriptor should parse the output from master and from describe for TTL	Major	shell
HBASE-14162	Fixing maven target for regenerating thrift classes fails against 0.9.2	Blocker	build, Thrift
HBASE-14168	Avoid useless retry for DoNotRetryIOException in TableRecordReaderImpl	Minor	mapreduce
HBASE-14173	includeMVCCReadpoint parameter in DefaultCompactor#createTmpWriter() represents no-op	Major	.
HBASE-14155	StackOverflowError in reverse scan	Critical	regionserver, Scanners
HBASE-14153	Typo in ProcedureManagerHost.MASTER_PROCEUDRE_CONF_KEY	Trivial	.
HBASE-14157	Interfaces implemented by subclasses should be checked when registering CoprocessorService	Major	Coprocessors
HBASE-14024	ImportTsv is not loading hbase-default.xml	Critical	mapreduce
HBASE-14156	Fix test failure in TestOpenTableInCoprocessor	Major	.
HBASE-14146	Once replication sees an error it slows down forever	Major	Replication
HBASE-14115	Fix resource leak in HMasterCommandLine	Major	master, tooling
HBASE-14119	Show meaningful error messages instead of stack traces in hbase shell commands. Fixing few commands in this jira.	Minor	.
HBASE-14065	ref guide section on release candidate generation refers to old doc files	Major	documentation
HBASE-14000	Region server failed to report to Master and was stuck in reportForDuty retry loop	Major	regionserver
HBASE-14106	TestProcedureRecovery is flaky	Major	proc-v2, test
HBASE-14076	ResultSerialization and MutationSerialization can throw InvalidProtocolBufferException when serializing a cell larger than 64MB	Major	.
HBASE-13971	Flushes stuck since 6 hours on a regionserver.	Critical	regionserver
HBASE-14050	NPE in org.apache.hadoop.hbase.ipc.RpcServer$Connection.readAndProcess	Minor	.
HBASE-14100	Fix high priority findbugs warnings	Major	regionserver
HBASE-14089	Remove unnecessary draw of system entropy from RecoverableZooKeeper	Minor	.
HBASE-14094	Procedure.proto can't be compiled to C++	Major	proc-v2, Protobufs
HBASE-14077	Add package to hbase-protocol protobuf files.	Major	Protobufs
HBASE-14041	Client MetaCache is cleared if a ThrottlingException is thrown	Minor	Client
HBASE-13897	OOM may occur when Import imports a row with too many KeyValues	Major	.
HBASE-14073	TestRemoteTable.testDelete failed in the latest trunk code	Major	REST
HBASE-13997	ScannerCallableWithReplicas cause Infinitely blocking	Minor	Client
HBASE-14029	getting started for standalone still references hadoop-version-specific binary artifacts	Major	documentation
HBASE-14042	Fix FATAL level logging in FSHLog where logged for non fatal exceptions	Major	Operability, wal
HBASE-13337	Table regions are not assigning back, after restarting all regionservers at once.	Blocker	Region Assignment
HBASE-13561	ITBLL.Verify doesn't actually evaluate counters after job completes	Major	integration tests
HBASE-13988	Add exception handler for lease thread	Minor	.
HBASE-13352	Add hbase.import.version to Import usage.	Major	.
HBASE-14012	Double Assignment and Dataloss when ServerCrashProcedure runs during Master failover	Blocker	master, Region Assignment
HBASE-13329	ArrayIndexOutOfBoundsException in CellComparator#getMinimumMidpointArray	Critical	regionserver
HBASE-14011	MultiByteBuffer position based reads does not work correctly	Major	.
HBASE-13861	BucketCacheTmpl.jamon has wrong bucket free and used labels	Major	regionserver, UI
HBASE-14010	TestRegionRebalancing.testRebalanceOnRegionServerNumberChange fails; cluster not balanced	Major	test
HBASE-14005	Set permission to .top hfile in LoadIncrementalHFiles	Trivial	.
HBASE-13970	NPE during compaction in trunk	Major	regionserver
HBASE-13895	DATALOSS: Region assigned before WAL replay when abort	Critical	Recovery, Region Assignment, wal
HBASE-13978	Variable never assigned in SimpleTotalOrderPartitioner.getPartition()	Major	mapreduce
HBASE-13995	ServerName is not fully case insensitive	Major	Region Assignment
HBASE-13959	Region splitting uses a single thread in most common cases	Critical	regionserver
HBASE-13989	Threshold for combined MemStore and BlockCache percentages is not checked	Major	regionserver
HBASE-13930	Exclude Findbugs packages from shaded jars	Major	build, Client
HBASE-13863	Multi-wal feature breaks reported number and size of HLogs	Major	regionserver, UI
HBASE-13974	TestRateLimiter#testFixedIntervalResourceAvailability may fail	Minor	test
HBASE-13969	AuthenticationTokenSecretManager is never stopped in RPCServer	Minor	.
HBASE-13923	Loaded region coprocessors are not reported in shell status command	Major	regionserver, shell
HBASE-13893	Replace HTable with Table in client tests	Major	Client, test
HBASE-13835	KeyValueHeap.current might be in heap when exception happens in pollRealKV	Major	Scanners
HBASE-13945	Prefix_Tree seekBefore() does not work correctly	Major	io
HBASE-13958	RESTApiClusterManager calls kill() instead of suspend() and resume()	Minor	integration tests
HBASE-13938	Deletes done during the region merge transaction may get eclipsed	Major	master, regionserver
HBASE-13933	DBE's seekBefore with tags corrupts the tag's offset information thus leading to incorrect results	Critical	io
HBASE-13877	Interrupt to flush from TableFlushProcedure causes dataloss in ITBLL	Blocker	integration tests, proc-v2
HBASE-13918	Fix hbase:namespace description in webUI	Trivial	hbase
HBASE-13885	ZK watches leaks during snapshots	Critical	snapshots
HBASE-13737	[HBase MOB] MOBTable cloned from a snapshot leads to data loss, when that actual snapshot and main table is deleted.	Critical	mob
HBASE-13913	RAT exclusion list missing asciidoctor support files	Major	.
HBASE-13279	Add src/main/asciidoc/asciidoctor.css to RAT exclusion list in POM	Minor	documentation
HBASE-13821	WARN if hbase.bucketcache.percentage.in.combinedcache is set	Minor	regionserver, Usability
HBASE-13888	Fix refill bug from HBASE-13686	Major	regionserver
HBASE-13905	TestRecoveredEdits.testReplayWorksThoughLotsOfFlushing failing consistently on branch-1.1	Critical	regionserver, test
HBASE-13833	LoadIncrementalHFile.doBulkLoad(Path,HTable) doesn't handle unmanaged connections when using SecureBulkLoad	Major	tooling
HBASE-13901	Error while calling watcher on creating and deleting an HBase table	Minor	.
HBASE-13892	Scanner with all results filtered out results in NPE	Critical	Client
HBASE-13560	Large compaction queue should steal from small compaction queue when idle	Major	Compaction
HBASE-13878	Set hbase.fs.tmp.dir config in HBaseTestingUtility.java for Phoenix UT to use	Minor	test
HBASE-13873	LoadTestTool addAuthInfoToConf throws UnsupportedOperationException	Major	integration tests
HBASE-13875	Clock skew between master and region server may render restored region without server address	Major	snapshots
HBASE-13845	Expire of one region server carrying meta can bring down the master	Major	master
HBASE-13847	getWriteRequestCount function in HRegionServer uses int variable to return the count.	Major	hbase, regionserver
HBASE-13811	Splitting WALs, we are filtering out too many edits -> DATALOSS	Critical	wal
HBASE-13853	ITBLL improvements after HBASE-13811	Blocker	integration tests, tooling, wal
HBASE-13686	Fail to limit rate in RateLimiter	Major	Client
HBASE-13851	RpcClientImpl.close() can hang with cancelled replica RPCs	Major	IPC/RPC
HBASE-13834	Evict count not properly passed to HeapMemoryTuner.	Major	hbase, regionserver
HBASE-13729	Old hbase.regionserver.global.memstore.upperLimit and lowerLimit properties are ignored if present	Critical	regionserver
HBASE-13789	ForeignException should not be sent to the client	Minor	Client, master
HBASE-13779	Calling table.exists() before table.get() end up with an empty Result	Major	Client
HBASE-13831	TestHBaseFsck#testParallelHbck is flaky against hadoop 2.6+	Minor	hbck, test
HBASE-13826	Unable to create table when group acls are appropriately set.	Major	security
HBASE-13824	TestGenerateDelegationToken: Master fails to start in Windows environment	Minor	test
HBASE-13647	Default value for hbase.client.operation.timeout is too high	Blocker	Client
HBASE-13820	Zookeeper is failing to start	Critical	.
HBASE-13638	Put copy constructor is shallow	Major	Client
HBASE-13809	TestRowTooBig should use HDFS directory for its region directory	Minor	test
HBASE-13812	Deleting of last Column Family of a table should not be allowed	Major	master
HBASE-13813	Fix Javadoc warnings in Procedure.java	Minor	documentation
HBASE-13776	Setting illegal versions for HColumnDescriptor does not throw IllegalArgumentException	Major	API
HBASE-13802	Procedure V2: Master fails to come up due to rollback of create namespace table	Major	master, proc-v2
HBASE-13796	ZKUtil doesn't clean quorum setting properly	Minor	.
HBASE-13800	TestStore#testDeleteExpiredStoreFiles should create unique data/log directory for each call	Minor	test
HBASE-13797	Fix resource leak in HBaseFsck	Minor	.
HBASE-13801	Hadoop src checksum is shown instead of HBase src checksum in master / RS UI	Major	UI
HBASE-13723	In table.rb scanners are never closed.	Major	shell
HBASE-13777	Table fragmentation display triggers NPE on master status page	Major	UI
HBASE-13778	BoundedByteBufferPool incorrectly increasing runningAverage buffer length	Major	io, util
HBASE-13732	TestHBaseFsck#testParallelWithRetriesHbck fails intermittently	Minor	hbck, test
HBASE-13768	ZooKeeper znodes are bootstrapped with insecure ACLs in a secure configuration	Blocker	security, Zookeeper
HBASE-13767	Allow ZKAclReset to set and not just clear ZK ACLs	Trivial	Operability, Zookeeper
HBASE-13746	list_replicated_tables command is not listing table in hbase shell.	Major	shell
HBASE-13760	Cleanup Findbugs keySet iterator warnings	Minor	.
HBASE-13734	Improper timestamp checking with VisibilityScanDeleteTracker	Major	security
HBASE-13604	bin/hbase mapredcp does not include yammer-metrics jar	Minor	.
HBASE-13703	ReplicateContext should not be a member of ReplicationSource	Minor	.
HBASE-13733	Failed MiniZooKeeperCluster startup did not shutdown ZK servers	Major	Zookeeper
HBASE-13741	Disable TestRegionObserverInterface#testRecovery and testLegacyRecovery	Minor	.
HBASE-13731	TestReplicationAdmin should clean up MiniZKCluster resource	Trivial	test
HBASE-13709	Updates to meta table server columns may be eclipsed	Major	IPC/RPC, regionserver
HBASE-13721	Improve shell scan performances when using LIMIT	Major	shell
HBASE-13700	Allow Thrift2 HSHA server to have configurable threads	Major	Thrift
HBASE-13719	Asynchronous scanner -- cache size-in-bytes bug fix	Major	.
HBASE-13618	ReplicationSource is too eager to remove sinks	Minor	.
HBASE-13711	Provide an API to set min and max versions in HColumnDescriptor	Minor	.
HBASE-13722	Avoid non static method from BloomFilterUtil	Trivial	.
HBASE-13704	Hbase throws OutOfOrderScannerNextException when MultiRowRangeFilter is used	Major	Client
HBASE-13717	TestBoundedRegionGroupingProvider#setMembershipDedups need to set HDFS diretory for WAL	Minor	wal
HBASE-13693	[HBase MOB] Mob files are not encrypting.	Major	mob
HBASE-13694	CallQueueSize is incorrectly decremented until the response is sent	Major	IPC/RPC, master, regionserver
HBASE-13668	TestFlushRegionEntry is flaky	Minor	.
HBASE-13699	Expand information about HBase quotas	Major	documentation
HBASE-13651	Handle StoreFileScanner FileNotFoundException	Minor	.
HBASE-11830	TestReplicationThrottler.testThrottling failed on virtual boxes	Minor	test
HBASE-13663	HMaster fails to restart 'HMaster: Failed to become active master'	Major	hbase
HBASE-13217	Procedure fails due to ZK issue	Major	.
HBASE-13662	RSRpcService.scan() throws an OutOfOrderScannerNext if the scan has a retriable failure	Major	IPC/RPC, regionserver
HBASE-13533	section on configuring ~/.m2/settings.xml has no anchor	Trivial	documentation
HBASE-13661	Correct binary compatibility issues discovered in 1.1.0RC0	Major	.
HBASE-13606	AssignmentManager.assign() is not sync in both path	Major	Region Assignment
HBASE-13635	Regions stuck in transition because master is incorrectly assumed dead	Major	master, regionserver
HBASE-13634	Avoid unsafe reference equality checks to EMPTY byte[]	Major	Compaction, Scanners
HBASE-1989	Admin (et al.) not accurate with Column vs. Column-Family usage	Minor	Client
HBASE-13580	region_mover.rb broken with TypeError: no public constructors for Java::OrgApacheHadoopHbaseClient::HTable	Major	scripts
HBASE-13611	update clover to work for current versions	Minor	build
HBASE-13653	Uninitialized HRegionServer#walFactory may result in NullPointerException at region server startup​	Major	hbase
HBASE-13612	TestRegionFavoredNodes doesn't guard against setup failure	Minor	test
HBASE-13649	CellComparator.compareTimestamps javadoc inconsistent and wrong	Minor	documentation
HBASE-13648	test-patch.sh should ignore 'protobuf.generated'	Minor	build
HBASE-13630	Remove dead code in BufferedDataEncoder	Minor	.
HBASE-13576	HBCK enhancement: Failure in checking one region should not fail the entire HBCK operation.	Major	hbck
HBASE-13625	Use HDFS for HFileOutputFormat2 partitioner's path	Major	mapreduce
HBASE-13633	draining_servers.rb broken with NoMethodError: undefined method 'getServerInfo'	Major	scripts
HBASE-13628	Use AtomicLong as size in BoundedConcurrentLinkedQueue	Major	util
HBASE-13617	TestReplicaWithCluster.testChangeTable timeout	Major	test
HBASE-13599	The Example Provided in Section 69: Examples of the Documentation Does Not Compile	Minor	documentation
HBASE-13333	Renew Scanner Lease without advancing the RegionScanner	Major	.
HBASE-13607	TestSplitLogManager.testGetPreviousRecoveryMode consistently failing	Minor	test
HBASE-12413	Mismatch in the equals and hashcode methods of KeyValue	Minor	.
HBASE-13312	SmallScannerCallable does not increment scan metrics	Major	Client, Scanners
HBASE-13608	413 Error with Stargate through Knox, using AD, SPNEGO, and Pre-Auth	Major	REST
HBASE-13601	Connection leak during log splitting	Major	wal
HBASE-13600	check_compatibility.sh should ignore shaded jars	Minor	build
HBASE-13595	Fix Javadoc warn induced in Bytes.java	Trivial	.
HBASE-13564	Master MBeans are not published	Major	master, metrics
HBASE-13596	src assembly does not build	Major	build
HBASE-13594	MultiRowRangeFilter shouldn't call HBaseZeroCopyByteString.wrap() directly	Major	.
HBASE-13577	Documentation is pointing to wrong port for Master Web UI	Minor	documentation
HBASE-13585	HRegionFileSystem#splitStoreFile() finishes without closing the file handle in some situation	Major	regionserver
HBASE-13589	[WINDOWS] hbase.cmd script is broken	Major	.
HBASE-13417	batchCoprocessorService() does not handle NULL keys	Minor	Coprocessors
HBASE-13517	Publish a client artifact with shaded dependencies	Major	.
HBASE-13575	TestChoreService has to make sure that the opened ChoreService is closed for each unit test	Trivial	.
HBASE-13394	Failed to recreate a table when quota is enabled	Major	security
HBASE-13490	foreground daemon start re-executes ulimit output	Minor	scripts
HBASE-13359	Update ACL matrix to include table owner.	Minor	documentation
HBASE-13149	HBase MR is broken on Hadoop 2.5+ Yarn	Blocker	.
HBASE-13546	NPE on region server status page if all masters are down	Major	regionserver
HBASE-13555	StackServlet produces 500 error	Major	.
HBASE-13523	API Doumentation formatting is broken	Minor	documentation
HBASE-13528	A bug on selecting compaction pool	Minor	Compaction
HBASE-13526	TestRegionServerReportForDuty can be flaky: hang or timeout	Minor	test
HBASE-13527	The default value for hbase.client.scanner.max.result.size is never actually set on Scans	Major	.
HBASE-13437	ThriftServer leaks ZooKeeper connections	Major	Thrift
HBASE-13524	TestReplicationAdmin fails on JDK 1.8	Major	.
HBASE-13499	AsyncRpcClient test cases failure in powerpc	Major	IPC/RPC
HBASE-13471	Fix a possible infinite loop in doMiniBatchMutation	Major	.
HBASE-13520	NullPointerException in TagRewriteCell	Major	.
HBASE-13482	Phoenix is failing to scan tables on secure environments.	Major	.
HBASE-13430	HFiles that are in use by a table cloned from a snapshot may be deleted when that snapshot is deleted	Critical	hbase
HBASE-13491	Issue in FuzzyRowFilter#getNextForFuzzyRule	Major	Filters
HBASE-13477	Create metrics on failed requests	Major	.
HBASE-13486	region_status.rb broken with NameError: uninitialized constant IOException	Major	scripts
HBASE-13473	deleted cells come back alive after the stripe compaction	Blocker	Compaction
HBASE-12006	[JDK 8] KeyStoreTestUtil#generateCertificate fails due to "subject class type invalid"	Minor	.
HBASE-13460	Revise the MetaLookupPool executor-related defaults (introduced in HBASE-13036)	Major	.
HBASE-13475	Small spelling mistake in region_mover#isSuccessfulScan causes NoMethodError	Trivial	scripts
HBASE-13301	Possible memory leak in BucketCache	Major	BlockCache
HBASE-13457	SnapshotExistsException doesn't honor the DoNotRetry	Trivial	Client
HBASE-13423	Remove duplicate entry for hbase.regionserver.regionSplitLimit in hbase-default.xml	Minor	hbase
HBASE-13275	Setting hbase.security.authorization to false does not disable authorization	Major	security
HBASE-11544	[Ergonomics] hbase.client.scanner.caching is dogged and will try to return batch even if it means OOME	Critical	.
HBASE-13414	TestHCM no longer needs to test for JRE 6.	Minor	test
HBASE-13377	Canary may generate false alarm on the first region when there are many delete markers	Major	monitoring
HBASE-13289	typo in splitSuccessCount metric	Major	metrics
HBASE-13299	Add setReturnResults() to Increment, like Append has	Critical	API
HBASE-13410	Bug in KeyValueUtil.oswrite() for non Keyvalue cases	Major	.
HBASE-13411	Misleading error message when request size quota limit exceeds	Minor	.
HBASE-13409	Add categories to uncategorized tests	Trivial	.
HBASE-13374	Small scanners (with particular configurations) do not return all rows	Blocker	.
HBASE-13406	TestAccessController is flaky when create is slow	Minor	security, test
HBASE-13397	Purge duplicate rpc request thread local	Major	IPC/RPC
HBASE-13382	IntegrationTestBigLinkedList should use SecureRandom	Major	integration tests
HBASE-13385	TestGenerateDelegationToken is broken with hadoop 2.8.0	Major	test
HBASE-13388	Handling NullPointer in ZKProcedureMemberRpcs while getting ZNode data	Minor	.
HBASE-13058	Hbase shell command 'scan' for non existent table shows unnecessary info for one unrelated existent table.	Trivial	Client
HBASE-13091	Split ZK Quorum on Master WebUI	Minor	.
HBASE-13384	Fix Javadoc warnings introduced by HBASE-12972	Trivial	.
HBASE-13368	Hash.java is declared as public Interface - but it should be Private	Trivial	.
HBASE-13383	TestRegionServerObserver.testCoprocessorHooksInRegionsMerge zombie after HBASE-12975	Major	.
HBASE-13296	Fix the deletion of acl notify nodes for namespace.	Minor	.
HBASE-12954	Ability impaired using HBase on multihomed hosts	Minor	.
HBASE-13317	Region server reportForDuty stuck looping if there is a master change	Major	regionserver
HBASE-13371	Fix typo in TestAsyncIPC	Major	test
HBASE-13364	Make using the default javac on by default	Major	build
HBASE-12993	Use HBase 1.0 interfaces in hbase-thrift	Major	.
HBASE-13262	ResultScanner doesn't return all rows in Scan	Blocker	Client
HBASE-13357	If maxTables/maxRegions exceeds quota in a namespace, throw QuotaExceededException	Minor	.
HBASE-13355	QA bot reports checking javac twice	Minor	.
HBASE-13328	LoadIncrementalHFile.doBulkLoad(Path,HTable) should handle managed connections	Major	.
HBASE-13295	TestInfoServers hang	Major	test
HBASE-8725	Add total time RPC call metrics	Major	metrics
HBASE-13265	Make thrift2 usable from c++	Major	.
HBASE-13326	Disabled table can't be enabled after HBase is restarted	Blocker	.
HBASE-13325	Protocol Buffers 2.5 no longer available for download on code.google.com	Major	.
HBASE-13294	Fix the critical ancient loopholes in security testing infrastructure.	Major	.
HBASE-13311	TestQuotaThrottle flaky on slow machine	Minor	test
HBASE-13305	Get(Get get) is not copying the row key	Major	API
HBASE-13331	Exceptions from DFS client can cause CatalogJanitor to delete referenced files	Blocker	master
HBASE-13273	Make Result.EMPTY_RESULT read-only; currently it can be modified	Major	.
HBASE-13321	Fix flaky TestHBaseFsck	Minor	test
HBASE-13314	Fix NPE in HMaster.getClusterStatus()	Minor	.
HBASE-13281	'hbase.bucketcache.size' description in hbase book is not correct	Major	documentation
HBASE-13315	BufferedMutator should be @InterfaceAudience.Public	Major	.
HBASE-13309	Some tests do not reset EnvironmentEdgeManager	Minor	test
HBASE-13308	Fix flaky TestEndToEndSplitTransaction	Major	flakey, test
HBASE-13282	Fix the minor issues of running Canary on kerberized environment	Minor	.
HBASE-12867	Shell does not support custom replication endpoint specification	Major	.
HBASE-13274	Fix misplaced deprecation in Delete#addXYZ	Major	API
HBASE-13114	[UNITTEST] TestEnableTableHandler.testDeleteForSureClearsAllTableRowsFromMeta	Major	test
HBASE-13285	Fix flaky getRegions() in TestAccessController.setUp()	Minor	test
HBASE-13188	java.lang.ArithmeticException issue in BoundedByteBufferPool.putBuffer	Major	.
HBASE-13200	Improper configuration can leads to endless lease recovery during failover	Major	MTTR
HBASE-13253	LoadIncrementalHFiles unify hfiles discovery	Major	Client, mapreduce
HBASE-13229	Specify bash for local-regionservers.sh and local-master-backup.sh	Minor	scripts
HBASE-13176	Flakey TestZooKeeper test.	Major	.
HBASE-13093	Local mode HBase instance doesn't shut down.	Major	.
HBASE-12908	Typos in MemStoreFlusher javadocs	Trivial	documentation
HBASE-13254	EnableTableHandler#prepare would not throw TableNotFoundException during recovery	Minor	.
HBASE-13193	RegionScannerImpl filters should not be reset if a partial Result is returned	Major	.
HBASE-13246	Correct the assertion for namespace permissions in tearDown method of TestAccessController	Minor	security, test
HBASE-13239	HBase grant at specific column level does not work for Groups	Major	hbase
HBASE-13242	TestPerColumnFamilyFlush.testFlushingWhenLogRolling hung	Major	test
HBASE-13227	LoadIncrementalHFile should skip non-files inside a possible family-dir	Minor	Client, mapreduce
HBASE-13232	ConnectionManger : Batch pool threads and metaLookup pool threads should use different name pattern	Trivial	.
HBASE-13097	Use same EventLoopGroup for different AsyncRpcClients if possible	Major	IPC/RPC, test
HBASE-13136	TestSplitLogManager.testGetPreviousRecoveryMode is flakey	Major	.
HBASE-13224	Minor formatting issue when logging a namespace scope in AuthResult#toContextString	Trivial	Coprocessors, security
HBASE-13194	TableNamespaceManager not ready cause MasterQuotaManager initialization fail	Major	master
HBASE-13218	Correct the syntax shown for using ExportSnapshot tool in the book	Minor	documentation
HBASE-13167	The check for balancerCutoffTime is buggy	Trivial	Balancer
HBASE-13192	IntegrationTestBulkLoad doesn't wait for table modification sometimes leading to spurious test failures	Major	.
HBASE-13191	mvn site fails on jenkins due to permgen	Major	.
HBASE-13208	Patch build should match the patch filename and not the whole relative URL in findBranchNameFromPatchName	Trivial	.
HBASE-13206	Fix TableLock tableName log format	Trivial	.
HBASE-13165	Fix docs and scripts for default max heaps size after HBASE-11804	Minor	documentation, scripts
HBASE-13174	Apply HBASE-11804 to Windows scripts	Major	scripts
HBASE-13196	Add info about default number of versions when using the export tool	Major	documentation
HBASE-13181	TestHRegionReplayEvents.testReplayBulkLoadEvent fails frequently.	Minor	.
HBASE-13186	HBase build error due to checkstyle	Major	build
HBASE-12931	The existing KeyValues in memstore are not removed completely after inserting cell into memStore	Minor	.
HBASE-12723	Update ACL matrix to reflect reality	Major	.
HBASE-13023	Document multiWAL	Major	documentation, wal
HBASE-12468	AUTHORIZATIONS should be part of Visibility Label Docs	Major	documentation
HBASE-13135	Move replication ops mgmt stuff from Javadoc to Ref Guide	Major	documentation, Replication
HBASE-12969	Parameter Validation is not there for shell script, local-master-backup.sh and local-regionservers.sh	Minor	scripts
HBASE-13084	Add labels to VisibilityLabelsCache asynchronously causes TestShell flakey	Major	test
HBASE-13150	TestMasterObserver failing disable table at end of test	Major	test
HBASE-13163	Add HBase version to header and footer of HTML and PDF docs	Major	documentation
HBASE-13076	Table can be forcibly enabled in AssignmentManager during table disabling.	Major	master, Region Assignment
HBASE-13155	Fix TestPrefixTree	Major	test
HBASE-13156	Fix minor rat violation recently introduced (asciidoctor.css).	Major	.
HBASE-13052	Explain each region split policy	Major	documentation
HBASE-13146	Race Condition in ScheduledChore and ChoreService	Major	regionserver
HBASE-13145	TestNamespaceAuditor.testRegionMerge is flaky	Major	test
HBASE-13139	Clean up missing JAVA_HOME message in bin/hbase-config.sh	Trivial	shell
HBASE-13115	Fix the usage of remote user in thrift doAs implementation.	Major	.
HBASE-13141	IntegrationTestAcidGuarantees returns incorrect values for getColumnFamilies	Major	integration tests
HBASE-13134	mutateRow and checkAndMutate apis don't throw region level exceptions	Major	.
HBASE-13123	Minor bug in ROW bloom filter	Minor	.
HBASE-13133	NPE when running TestSplitLogManager	Major	.
HBASE-13131	ReplicationAdmin leaks connections if there's an error in the constructor	Critical	Replication
HBASE-12924	HRegionServer#MovedRegionsCleaner Chore does not start	Minor	.
HBASE-13119	FileLink should implement equals	Major	.
HBASE-13112	quota.rb, security.rb and visibility_labels.rb leak connection	Major	shell
HBASE-13111	truncate_preserve command is failing with undefined method error	Major	shell
HBASE-13102	Fix Pseudo-distributed Mode which was broken in 1.0.0	Major	.
HBASE-13048	Use hbase.crypto.wal.algorithm in SecureProtobufLogReader while decrypting the data	Minor	.
HBASE-13085	Security issue in the implementation of Rest gataway 'doAs' proxy user support	Critical	REST, security
HBASE-13077	BoundedCompletionService doesn't pass trace info to server	Major	hbase
HBASE-13083	Master can be dead-locked while assigning META.	Major	master, Region Assignment
HBASE-12953	RegionServer is not functionally working with AysncRpcClient in secure mode	Critical	security
HBASE-13001	NullPointer in master logs for table.jsp	Trivial	.
HBASE-13032	Migration of states should be performed once META is assigned and onlined.	Major	.
HBASE-13070	Fix possibly zero length family and qualifier is TestCacheOnWrite	Major	test
HBASE-13081	Branch precommit builds are not updating to branch head before patch application	Major	.
HBASE-13069	Thrift Http Server returns an error code of 500 instead of 401 when authentication fails	Minor	.
HBASE-13072	BucketCache.evictBlock returns true if block does not exist	Major	BlockCache
HBASE-13075	TableInputFormatBase spuriously warning about multiple initializeTable calls	Minor	mapreduce
HBASE-13036	Meta scanner should use its own threadpool	Major	.
HBASE-13065	Increasing -Xmx when running TestDistributedLogSplitting	Major	test
HBASE-13066	Fix typo in AsyncRpcChannel	Major	IPC/RPC
HBASE-12102	Duplicate keys in HBase.RegionServer metrics JSON	Minor	.
HBASE-13061	RegionStates can remove wrong region from server holdings	Major	Region Assignment
HBASE-13050	Hbase shell create_namespace command throws ArrayIndexOutOfBoundException for (invalid) empty text input.	Trivial	.
HBASE-12948	Calling Increment#addColumn on the same column multiple times produces wrong result	Critical	Client, regionserver
HBASE-13040	Possible failure of TestHMasterRPCException	Major	test
HBASE-13055	HRegion FIXED_OVERHEAD missed one boolean	Major	.
HBASE-12412	update the ref guide(currently Example 10.2) to show "update an existing CF" with the new API modifyFamily in master	Minor	documentation
HBASE-13041	TestEnableTableHandler should not call AssignmentManager#assign concurrently with master	Major	integration tests
HBASE-13047	Add "HBase Configuration" link missing on the table details pages	Trivial	Operability
HBASE-13011	TestLoadIncrementalHFiles is flakey when using AsyncRpcClient as client implementation	Major	.
HBASE-13049	wal_roll ruby command doesn't work.	Major	shell
HBASE-13029	Table state should be deleted from META as a last operation in DeleteTableHandler	Major	master
HBASE-13007	Fix the test timeouts being caused by ChoreService	Major	.
HBASE-12920	hadoopqa should compile with different hadoop versions	Major	.
HBASE-12999	Make foreground_start return the correct exit code	Major	shell
HBASE-13004	Make possible to explain why HBaseTestingUtility.waitFor fails	Minor	test
HBASE-12961	Negative values in read and write region server metrics	Minor	regionserver
HBASE-12964	Add the ability for hbase-daemon.sh to start in the foreground	Major	.
HBASE-7332	[webui] HMaster webui should display the number of regions a table has.	Minor	UI
HBASE-12951	TestHCM.testConnectionClose is flakey when using AsyncRpcClient as client implementation	Major	IPC/RPC
HBASE-12877	Hbase documentation- a referenced link is not working	Minor	documentation
HBASE-12922	Post-asciidoc conversion fix-ups part 2	Major	documentation
HBASE-12902	Post-asciidoc conversion fix-ups	Major	documentation
HBASE-12903	Fix configuration which enables secure bulk load	Major	Coprocessors, documentation
HBASE-12871	Document JDK versions supported by each release missing in new documentation	Minor	documentation
HBASE-12845	ByteBufferOutputStream should grow as direct buffer if the initial buffer is also direct BB	Minor	.
HBASE-12858	Remove unneeded files under src/main/docbkx	Major	documentation
HBASE-11983	HRegion constructors should not create HLog	Major	wal
HBASE-12849	LoadIncrementalHFiles should use unmanaged connection in branch-1	Major	mapreduce
HBASE-12777	Multi-page book has broken links that work in the single-page version	Major	documentation
HBASE-12838	After HBASE-5162 RSRpcServices accidentally applies mutations twice	Major	.
HBASE-12775	CompressionTest ate my HFile (sigh!)	Major	test
HBASE-12772	TestPerColumnFamilyFlush failing	Major	test
HBASE-12749	Tighten HFileLink api to enable non-snapshot uses	Major	snapshots
HBASE-12734	TestPerColumnFamilyFlush.testCompareStoreFileCount is flakey	Minor	.
HBASE-12703	Cleanup TestClientPushback for repeatability	Minor	test
HBASE-12688	Update site with a bootstrap-based UI	Major	website
HBASE-12682	compaction thread throttle value is not correct in hbase-default.xml	Major	regionserver
HBASE-12690	list_quotas command is failing with not able to load Java class	Major	shell
HBASE-12687	Book is missing styling	Major	documentation
HBASE-12693	[docs] nit fix in HBase and MapReduce section	Major	documentation
HBASE-12677	Update replication docs to clarify terminology	Major	documentation
HBASE-9763	Scan javadoc doesn't fully capture semantics of start and stop row	Minor	documentation
HBASE-11153	Document that http webUI's should redirect to https when enabled	Minor	documentation, master, regionserver, UI
HBASE-12540	TestRegionServerMetrics#testMobMetrics test failure	Major	test
HBASE-12628	Update instructions for running shell tests using maven.	Minor	documentation, shell
HBASE-12553	request value is not consistent for restoreSnapshot in audit logs	Minor	security
HBASE-12548	Improve debuggability of IntegrationTestTimeBoundedRequestsWithRegionReplicas	Minor	.
HBASE-12603	Remove javadoc warnings introduced due to removal of unused imports	Major	.
HBASE-12474	Incorrect handling of default namespace in user_permission command.	Minor	.
HBASE-12552	listSnapshots should list only owned snapshots for non-super user	Major	snapshots
HBASE-12073	Shell command user_permission fails on the table created by user if he is not global admin.	Minor	.
HBASE-12535	NPE in WALFactory close under contention for getInstance	Major	Replication, wal
HBASE-12532	TestFilter failing occasionally with ExitCodeException doing chmod since HBASE-10378	Major	test
HBASE-12421	Clarify ACL concepts and best practices	Major	documentation, security
HBASE-12488	Small bug in publish_hbase_website.sh script	Minor	scripts
HBASE-12347	Fix the edge case where Hadoop QA's parsing of attached patches breaks the JIRA status checker in dev-support/rebase_all_git_branches.sh	Minor	scripts
HBASE-12409	Add actual tunable parameters for finding optimal # of regions per RS	Major	documentation, Performance
HBASE-12397	CopyTable fails to compile with the Hadoop 1 profile	Major	.
HBASE-12418	Multiple branches for MOB feature breaking git for case insensitive filesystems	Blocker	.
HBASE-12380	TestRegionServerNoMaster#testMultipleOpen is flaky after HBASE-11760	Major	test
HBASE-12326	Document scanner timeout workarounds in troubleshooting section	Major	documentation
HBASE-12283	Clean up some checkstyle errors	Major	.
HBASE-12307	Remove unused Imports in hbase-client and hbase-common	Minor	.
HBASE-12192	Remove EventHandlerListener	Major	master
HBASE-12186	Formatting error in Table 8.2. Examples of Visibility Expressions	Major	documentation
HBASE-12216	Lower closed region logging level	Minor	.
HBASE-12201	Close the writers in the MOB sweep tool	Minor	.
HBASE-11998	Document a workflow for cherry-picking a fix to a different branch	Major	documentation
HBASE-12193	Add missing docbook file to git	Major	documentation
HBASE-12172	Disable flakey TestRegionReplicaReplicationEndpoint and make fixing it a blocker on 1.0	Major	test
HBASE-11957	Backport to 0.94 HBASE-5974 Scanner retry behavior with RPC timeout on next() seems incorrect	Critical	.
HBASE-12030	Wrong compaction report and assert when MOB compaction switches to minor	Critical	Compaction, regionserver
HBASE-12005	Split/merge fails if master restarts before PONR	Major	.
HBASE-12027	The ZooKeeperWatcher in HMobStore only uses the default conf	Major	.
HBASE-11987	Make zk-less table states backward compatible.	Major	.
HBASE-11968	If MOB is enabled, it should make sure hfile v3 is being used.	Major	.
HBASE-11721	jdiff script no longer works as usage instructions indicate	Major	scripts
HBASE-8674	JUnit and Surefire TRUNK-HBASE-2 plugins need a new home	Major	build
HBASE-11855	HBase handbook chapter 18.9 out of date	Minor	documentation
HBASE-11689	Track meta in transition	Major	Region Assignment
HBASE-11834	TestHRegionBusyWait.testParallelAppendWithMemStoreFlush fails sporadically	Major	test
HBASE-11732	Should not preemptively offline a region	Major	Region Assignment
HBASE-11658	Piped commands to hbase shell should return non-zero if shell command failed.	Major	shell
HBASE-11333	Remove deprecated class MetaMigrationConvertingToPB	Trivial	master
HBASE-11661	Quickstart chapter claims standalone mode has multiple processes	Minor	documentation
HBASE-11629	Operational concerns for Replication should call out ZooKeeper	Major	documentation, Replication
HBASE-11640	Add syntax highlighting support to HBase Ref Guide programlistings	Major	documentation
HBASE-11648	Typo of config: hbase.hstore.compaction.ratio in book.xml	Minor	Compaction
HBASE-11539	Expand info about contributing to and building documentation	Major	documentation
HBASE-11316	Expand info about compactions beyond HBASE-11120	Major	Compaction, documentation
HBASE-11522	Move Replication information into the Ref Guide	Major	documentation
HBASE-11560	hbase.regionserver.global.memstore.size is documented twice	Major	.
HBASE-11529	Images and CSS still don't work properly on both html and html-single book	Major	documentation
HBASE-11521	Modify pom.xml to copy the images/ and css/ directories to the right location for the Ref Guide to see them correctly	Critical	documentation
HBASE-8473	add note to ref guide about snapshots and ec2 reverse dns requirements.	Major	documentation, snapshots
HBASE-11499	AsyncProcess.buildDetailedErrorMessage concatenates strings using + in a loop	Trivial	Client
HBASE-11500	Possible null pointer dereference of regionLocation in ReversedScannerCallable	Minor	Client

TESTS:

JIRA	Summary	Priority	Component
HBASE-20228	[Umbrella] Verify 1.2.7 shell works against 2.0.0 server	Blocker	shell
HBASE-20272	TestAsyncTable#testCheckAndMutateWithTimeRange fails due to TableExistsException	Major	.
HBASE-20107	Add a test case for HBASE-14317	Minor	wal
HBASE-20052	TestRegionOpen#testNonExistentRegionReplica fails due to NPE	Major	.
HBASE-20031	Unable to run integration test using mvn due to missing HBaseClassTestRule	Major	.
HBASE-19949	TestRSGroupsWithACL fails with ExceptionInInitializerError	Major	.
HBASE-19869	Wrong class name used in TestLockManager	Trivial	.
HBASE-19832	TestConfServlet#testWriteJson fails against hadoop3 due to spelling change	Minor	.
HBASE-19514	Use random port for TestJMXListener	Minor	.
HBASE-19289	CommonFSUtils$StreamLacksCapabilityException: hflush when running test against hadoop3 beta1	Critical	.
HBASE-19342	fix TestTableBasedReplicationSourceManagerImpl#testRemovePeerMetricsCleanup	Major	test
HBASE-19266	TestAcidGuarantees should cover adaptive in-memory compaction	Minor	.
HBASE-19288	Intermittent test failure in TestHStore.testRunDoubleMemStoreCompactors	Major	test
HBASE-19299	Assert only one Connection is constructed when calculating splits in a MultiTableInputFormat	Minor	test
HBASE-19273	IntegrationTestBulkLoad#installSlowingCoproc() uses read-only HTableDescriptor	Major	.
HBASE-19248	TestZooKeeper#testMultipleZK fails due to missing method getKeepAliveZooKeeperWatcher	Critical	Zookeeper
HBASE-19237	TestMaster.testMasterOpsWhileSplitting fails	Major	.
HBASE-16051	TestScannerHeartbeatMessages fails on some machines	Major	test
HBASE-19026	TestLockProcedure#testRemoteNamespaceLockRecovery fails in master	Major	.
HBASE-18902	TestCoprocessorServiceBackwardCompatibility fails	Major	.
HBASE-18632	TestMultiParallel#testFlushCommitsWithAbort fails in master branch	Major	test
HBASE-18147	nightly job to check health of active branches	Major	community, test
HBASE-17806	TestRSGroups#testMoveServersAndTables is flaky in master branch	Major	.
HBASE-17703	TestThriftServerCmdLine is flaky in master branch	Major	.
HBASE-17672	"Grant should set access rights appropriately" test fails	Major	.
HBASE-17657	TestZKAsyncRegistry is flaky	Major	.
HBASE-17628	Local mode of mini cluster shouldn't use hdfs	Minor	.
HBASE-17474	Reduce frequency of NoSuchMethodException when calling setStoragePolicy()	Minor	.
HBASE-17371	Enhance 'HBaseContextSuite @ distributedScan to test HBase client' with filter	Minor	.
HBASE-17246	TestSerialReplication#testRegionMerge fails in master branch	Major	.
HBASE-17189	TestMasterObserver#wasModifyTableActionCalled uses wrong variables	Minor	test
HBASE-17080	rest.TestTableResource fails in master branch	Major	.
HBASE-17120	TestAssignmentListener#testAssignmentListener fails	Minor	.
HBASE-16975	Disable two subtests of TestSerialReplication	Minor	.
HBASE-16274	Add more peer tests to replication_admin_test	Minor	.
HBASE-16781	Fix flaky TestMasterProcedureWalLease	Minor	proc-v2, test
HBASE-16794	TestDispatchMergingRegionsProcedure#testMergeRegionsConcurrently is flaky	Minor	test
HBASE-16791	Fix TestDispatchMergingRegionsProcedure	Minor	test
HBASE-16777	Fix flaky TestMasterProcedureEvents	Trivial	proc-v2, test
HBASE-16778	Move testIllegalTableDescriptor out from TestFromClientSide	Trivial	test
HBASE-16776	Remove duplicated versions of countRow() in tests	Trivial	test
HBASE-16725	Don't let flushThread hang in TestHRegion	Minor	.
HBASE-16671	Split TestExportSnapshot	Minor	snapshots, test
HBASE-16349	TestClusterId may hang during cluster shutdown	Minor	.
HBASE-16634	Speedup TestExportSnapshot	Minor	snapshots, test
HBASE-16639	TestProcedureInMemoryChore#testChoreAddAndRemove occasionally fails	Minor	.
HBASE-16418	Reduce duration of sleep waiting for region reopen in IntegrationTestBulkLoad#installSlowingCoproc()	Minor	.
HBASE-16185	TestReplicationSmallTests fails in master branch	Major	.
HBASE-16049	TestRowProcessorEndpoint is failing on Apache Builds	Major	.
HBASE-15939	Two shell test failures on master	Major	.
HBASE-15923	Shell rows counter test fails	Major	.
HBASE-15760	TestBlockEvictionFromClient#testParallelGetsAndScanWithWrappedRegionScanner fails in master branch	Minor	.
HBASE-15679	Assertion on wrong variable in TestReplicationThrottler#testThrottling	Minor	.
HBASE-13372	Unit tests for SplitTransaction and RegionMergeTransaction listeners	Major	.
HBASE-15420	TestCacheConfig failed after HBASE-15338	Minor	test
HBASE-15192	TestRegionMergeTransactionOnCluster#testCleanMergeReference is flaky	Minor	.
HBASE-14584	TestNamespacesInstanceModel fails on jdk8	Major	REST, test
HBASE-14758	Add UT case for unchecked error/exception thrown in AsyncProcess#sendMultiAction	Minor	Client, test
HBASE-14728	TestRowCounter is broken in master	Major	.
HBASE-14688	Cleanup MOB tests	Trivial	mob
HBASE-14466	Remove duplicated code from MOB snapshot tests	Trivial	mob, test
HBASE-14344	Add timeouts to TestHttpServerLifecycle	Minor	test
HBASE-14310	test-patch.sh should handle spurious non-zero exit code from maven	Minor	.
HBASE-14293	TestStochasticBalancerJmxMetrics intermittently fails due to port conflict	Minor	.
HBASE-14277	TestRegionServerHostname.testRegionServerHostname may fail at host with a case sensitive name	Minor	test
HBASE-14210	Create test for cell level ACLs involving user group	Major	test
HBASE-14200	Separate RegionReplica subtests of TestStochasticLoadBalancer into TestStochasticLoadBalancer2	Minor	.
HBASE-14197	TestRegionServerHostname#testInvalidRegionServerHostnameAbortsServer fails in Jenkins	Minor	.
HBASE-13940	IntegrationTestBulkLoad needs option to specify output folders used by test	Major	integration tests
HBASE-13609	TestFastFail is still failing	Major	test
HBASE-13591	TestHBaseFsck is flakey	Major	hbck
HBASE-13413	Create an integration test for Replication	Minor	integration tests
HBASE-13280	TestSecureRPC failed	Minor	.
HBASE-13182	Test NamespaceAuditor/AccessController create/delete table is flaky	Minor	test
HBASE-13179	TestMasterObserver deleteTable is flaky	Minor	test
HBASE-13106	Ensure endpoint-only table coprocessors can be dynamically loaded	Trivial	.
HBASE-12992	TestChoreService doesn't close services, that can break test on slow virtual hosts.	Major	.
HBASE-12764	TestPerColumnFamilyFlush#testCompareStoreFileCount may fail due to new table not available	Minor	.
HBASE-11867	TestSplitLogManager.testUnassignedTimeout is flaky	Minor	.
HBASE-11866	TestDistributedLogSplitting is flaky	Minor	.
HBASE-11673	TestIOFencing#testFencingAroundCompactionAfterWALSync fails	Major	.
HBASE-4744	Remove @Ignore for testLogRollAfterSplitStart	Critical	.
HBASE-11616	TestNamespaceUpgrade fails in trunk	Major	.
HBASE-11039	[VisibilityController] Integration test for labeled data set mixing and filtered excise	Critical	.
HBASE-11461	Compilation errors are not posted back to JIRA during QA run	Minor	.

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-20059	Make sure documentation is updated for the offheap Bucket cache usage	Critical	documentation
HBASE-20454	[DOC] Add note on perf to upgrade section	Major	.
HBASE-20347	[DOC] upgrade section should warn about logging changes	Critical	documentation, logging
HBASE-20349	[DOC] upgrade guide should call out removal of prefix-tree data block encoding	Critical	documentation
HBASE-17554	Figure 2.0.0 Hadoop Version Support; update refguide	Blocker	documentation
HBASE-20253	Error message is missing for restore_snapshot	Minor	shell
HBASE-20380	Put up 2.0.0RC0	Major	.
HBASE-20149	Purge dev javadoc from bin tarball (or make a separate tarball of javadoc)	Critical	build, community, documentation
HBASE-18828	[2.0] Generate CHANGES.txt	Blocker	.
HBASE-20287	After cluster startup list_regions command fails on disabled table	Minor	shell
HBASE-20258	Shell hangs when scanning a disabled table	Major	.
HBASE-20354	[DOC] quickstart guide needs to include note about durability checks for standalone mode	Blocker	documentation, hadoop3
HBASE-17730	[DOC] Migration to 2.0 for coprocessors	Blocker	documentation, migration
HBASE-20337	Update the doc on how to setup shortcircuit reads; its stale	Major	.
HBASE-20298	Doc change in read/write/total accounting metrics	Critical	documentation
HBASE-16848	Usage for show_peer_tableCFs command doesn't include peer	Minor	.
HBASE-20254	Incorrect help message for merge_region	Minor	shell
HBASE-17819	Reduce the heap overhead for BucketCache	Critical	BucketCache
HBASE-20245	HTrace commands do not work	Major	.
HBASE-20241	splitormerge_enabled does not work	Critical	shell
HBASE-20202	[AMv2] Don't move region if its a split parent or offlined	Critical	amv2
HBASE-20247	Set version as 2.0.0 in branch-2.0 in prep for first RC	Major	.
HBASE-20232	[LOGGING] Formatting around close and flush	Major	.
HBASE-20190	Fix default for MIGRATE_TABLE_STATE_FROM_ZK_KEY	Critical	.
HBASE-20180	Avoid Class::newInstance	Major	.
HBASE-20178	[AMv2] Throw exception if hostile environment	Major	amv2
HBASE-20173	[AMv2] DisableTableProcedure concurrent to ServerCrashProcedure can deadlock	Critical	amv2
HBASE-19093	Check Admin/Table to ensure all operations go via AccessControl	Blocker	.
HBASE-19114	Split out o.a.h.h.zookeeper from hbase-server and hbase-client	Major	.
HBASE-18758	[TEST][compat 1-2] Test delegation tokens continue to work when hbase1 going against hbase2 cluster	Critical	API
HBASE-20113	Move branch-2 version from 2.0.0-beta-2-SNAPSHOT to 2.0.0-beta-2	Major	.
HBASE-20100	TestEnableTableProcedure flakey	Major	amv2, flakey
HBASE-19400	Add missing security checks in MasterRpcServices	Major	.
HBASE-20069	fix existing findbugs errors in hbase-server	Critical	findbugs
HBASE-20036	TestAvoidCellReferencesIntoShippedBlocks timed out	Major	.
HBASE-20083	Fix findbugs error for ReplicationSyncUp	Major	findbugs
HBASE-20019	Document the ColumnValueFilter	Minor	documentation
HBASE-20048	Revert serial replication feature	Blocker	Replication
HBASE-20044	TestClientClusterStatus is flakey	Major	flakey
HBASE-19554	AbstractTestDLS.testThreeRSAbort sometimes fails in pre commit	Major	Recovery, wal
HBASE-20038	TestLockProcedure.testTimeout is flakey	Major	proc-v2, test
HBASE-20041	cannot start mini mapreduce cluster for ITs	Major	.
HBASE-20035	.TestQuotaStatusRPCs.testQuotaStatusFromMaster failed with NPEs and RuntimeExceptions	Major	.
HBASE-20039	move testhbasetestingutility mr tests to hbase-mapreduce	Major	.
HBASE-20021	TestFromClientSideWithCoprocessor is flakey	Major	.
HBASE-20029	@Ignore TestQuotaThrottle and TestReplicasClient#testCancelOfMultiGet	Major	.
HBASE-20015	TestMergeTableRegionsProcedure and TestRegionMergeTransactionOnCluster flakey	Major	flakey
HBASE-20013	TestZKPermissionWatcher is flakey	Major	flakey
HBASE-20014	TestAdmin1 Times out	Major	.
HBASE-19978	The keepalive logic is incomplete in ProcedureExecutor	Major	.
HBASE-20011	Disable TestRestoreSnapshotFromClientWithRegionReplicas; it is flakey. Needs attention.	Major	read replicas
HBASE-19903	Split TestShell so it will not time out	Major	shell, test
HBASE-20000	Remove the quantum logic in FairQueue, always put high priority queue in front	Major	proc-v2
HBASE-19116	Currently the tail of hfiles with CellComparator* classname makes it so hbase1 can't open hbase2 written hfiles; fix	Critical	HFile, migration
HBASE-19965	Fix flaky TestAsyncRegionAdminApi	Critical	.
HBASE-19960	Doc test timeouts and test categories in hbase2	Major	.
HBASE-19942	Fix flaky TestSimpleRpcScheduler	Major	.
HBASE-19956	Remove category as a consideration timing out tests; set all test to timeout at 10minutes regardless	Major	.
HBASE-19951	Cleanup the explicit timeout value for test method	Major	.
HBASE-19791	TestZKAsyncRegistry hangs	Critical	.
HBASE-19840	Flakey TestMetaWithReplicas	Major	flakey, test
HBASE-19927	TestFullLogReconstruction flakey	Major	wal
HBASE-19841	Tests against hadoop3 fail with StreamLacksCapabilityException	Major	.
HBASE-19944	Fix timeout TestVisibilityLabelsWithCustomVisLabService	Major	.
HBASE-19931	TestMetaWithReplicas failing 100% of the time in testHBaseFsckWithMetaReplicas	Major	.
HBASE-19837	Flakey TestRegionLoad	Major	flakey, test
HBASE-19803	False positive for the HBASE-Find-Flaky-Tests job	Major	.
HBASE-19910	TestBucketCache TimesOut	Major	.
HBASE-19916	TestCacheOnWrite Times Out	Major	.
HBASE-19914	Refactor TestVisibilityLabelsOnNewVersionBehaviorTable	Major	test
HBASE-19868	TestCoprocessorWhitelistMasterObserver is flakey	Major	flakey, test
HBASE-19908	TestCoprocessorShortCircuitRPC Timeout....	Major	.
HBASE-19909	TestRegionLocationFinder Timeout	Major	.
HBASE-19928	TestVisibilityLabelsOnNewVersionBehaviorTable fails	Major	test
HBASE-19918	Promote TestAsyncClusterAdminApi to LargeTests	Major	test
HBASE-19896	Fix ScanInfo.customize() to update only the requested options	Major	Coprocessors
HBASE-19895	Add keepDeletedCells option in ScanOptions for customizing scanInfo in pre-hooks	Major	Coprocessors
HBASE-19913	Split TestStochasticLoadBalancer2	Major	test
HBASE-19839	Flakey TestMergeTableRegionsProcedure & TestSplitTableRegionProcedure	Major	flakey, test
HBASE-19911	Convert some tests from small to medium because they are timing out: TestNettyRpcServer, TestClientClusterStatus, TestCheckTestClasses	Major	.
HBASE-19887	Do not overwrite the surefire junit listener property in the pom of sub modules	Major	build
HBASE-19891	Up nightly test run timeout from 6 hours to 8	Major	.
HBASE-19811	Fix findbugs and error-prone warnings in hbase-server (branch-2)	Major	.
HBASE-19885	Promote TestAssignmentManager to LargeTests	Major	.
HBASE-19866	TestRegionServerReportForDuty doesn't timeout	Major	rpc
HBASE-19882	Promote TestProcedureManager to MediumTests	Major	test
HBASE-19877	hbase-common and hbase-zookeeper don't add the log4j.properties to the resource path for testing	Critical	test
HBASE-19870	Fix the NPE in ReadOnlyZKClient#run	Major	.
HBASE-19881	Promote TestRegionReplicaReplicationEndpoint to LargeTests	Major	test
HBASE-19880	Promote TestFuzzyRowFilterEndToEnd to LargeTests	Major	test
HBASE-19879	Promote TestAcidGuaranteesXXX to LargeTests	Major	test
HBASE-19867	Split TestStochasticLoadBalancer into several small tests	Major	test
HBASE-19862	Fix TestTokenAuthentication - fake RegionCoprocessorEnvironment is not of type HasRegionServerServices	Major	.
HBASE-19846	Fix findbugs and error-prone warnings in hbase-rest (branch-2)	Major	.
HBASE-19845	Fix findbugs and error-prone warnings in hbase-rsgroup (branch-2)	Major	.
HBASE-19847	Fix findbugs and error-prone warnings in hbase-thrift (branch-2)	Major	.
HBASE-19827	Addendum for Flakey TestAssignmentManager	Major	flakey, test
HBASE-18963	Remove MultiRowMutationProcessor and implement mutateRows... methods using batchMutate()	Major	regionserver
HBASE-19527	Make ExecutorService threads daemon=true.	Major	.
HBASE-19810	Fix findbugs and error-prone warnings in hbase-metrics (branch-2)	Major	.
HBASE-19809	Fix findbugs and error-prone warnings in hbase-procedure (branch-2)	Major	.
HBASE-19793	Minor improvements on Master/RS startup	Major	.
HBASE-19795	Move the tests which only need zookeeper in TestZooKeeper to hbase-zookeeper module	Major	.
HBASE-19772	Do not close connection to zk when there are still pending request in ReadOnlyZKClient	Major	Zookeeper
HBASE-19787	Fix or disable tests broken in branch-2 so can cut beta-1	Critical	.
HBASE-19746	Add default impl to Cell#getType	Critical	.
HBASE-19743	Disable TestMemstoreLABWithoutPool	Major	test
HBASE-19731	TestFromClientSide#testCheckAndDeleteWithCompareOp and testNullQualifier are flakey	Critical	test
HBASE-19604	Fix Checkstyle errors in hbase-protocol-shaded	Minor	.
HBASE-19581	Fix Checkstyle error in hbase-external-blockcache	Trivial	.
HBASE-19667	Get rid of MasterEnvironment#supportGroupCPs	Major	Coprocessors
HBASE-19670	Workaround: Purge User API building from branch-2 so can make a beta-1	Major	website
HBASE-19428	Deprecate the compareTo(Row)	Major	.
HBASE-19282	CellChunkMap Benchmarking and User Interface	Major	.
HBASE-19660	Up default retries from 10 to 15 and blocking store files limit from 10 to 16	Major	.
HBASE-19133	Transfer big cells or upserted/appended cells into MSLAB upon flattening to CellChunkMap	Major	.
HBASE-19653	Reduce the default hbase.client.start.log.errors.counter	Trivial	defaults
HBASE-19626	Rename Cell.DataType to Cell.Type	Minor	.
HBASE-19648	Move branch-2 version from 2.0.0-beta-1-SNAPSHOT to 2.0.0-beta-1	Major	.
HBASE-19609	Fix Checkstyle errors in hbase-metrics	Minor	metrics
HBASE-19628	ByteBufferCell should extend ExtendedCell	Major	.
HBASE-19629	RawCell#getTags should return the Iterator<Tag> in order to avoid iterating through whole tag array at once	Major	.
HBASE-19605	Fix Checkstyle errors in hbase-metrics-api	Minor	metrics
HBASE-19602	Cleanup the usage of ReplicationAdmin from document	Minor	.
HBASE-19502	Make sure we have closed all StoreFileScanners if we fail to open any StoreFileScanners	Major	regionserver, Scanners
HBASE-19591	Cleanup the usage of ReplicationAdmin from hbase-shell	Major	.
HBASE-10092	Move to slf4j	Critical	.
HBASE-19575	add copy constructor to Mutation	Major	.
HBASE-19566	Fix Checkstyle errors in hbase-client-project	Trivial	.
HBASE-19567	ClassNotFoundException: org.apache.hadoop.hbase.KeyValue$RawBytesComparator starting 2.0.0 over a 0.98.25 data.	Major	HFile
HBASE-19468	FNFE during scans and flushes	Critical	regionserver, Scanners
HBASE-19556	Remove TestAssignmentManager#testGoodSplit, which no longer make sense	Minor	.
HBASE-19494	Create simple WALKey filter that can be plugged in on the Replication Sink	Major	Replication
HBASE-19480	Enable Checkstyle in hbase-annotations	Trivial	.
HBASE-19481	Enable Checkstyle in hbase-error-prone	Trivial	.
HBASE-19538	Remove unnecessary semicolons in hbase-client	Minor	.
HBASE-19539	Remove unnecessary semicolons in hbase-common	Minor	.
HBASE-18440	ITs and Actions modify immutable TableDescriptors	Major	integration tests
HBASE-19112	Suspect methods on Cell to be deprecated	Blocker	Client
HBASE-19474	Bring down number of Checkstyle errors in hbase-zookeeper	Minor	Zookeeper
HBASE-19479	Fix Checkstyle error in hbase-shell	Trivial	shell
HBASE-19497	Fix findbugs and error-prone warnings in hbase-common (branch-2)	Major	.
HBASE-19498	Fix findbugs and error-prone warnings in hbase-client (branch-2)	Major	.
HBASE-19272	Deal with HBCK tests disabled by HBASE-14614 AMv2 when HBCK works again...	Major	hbck
HBASE-15536	Make AsyncFSWAL as our default WAL	Critical	wal
HBASE-19505	Disable ByteBufferPool by default at HM	Major	.
HBASE-19462	Deprecate all addImmutable methods in Put	Major	.
HBASE-19000	Group multiple block cache clear requests per server	Major	.
HBASE-19213	Align check and mutate operations in Table and AsyncTable	Minor	API
HBASE-19427	Add TimeRange support into Append to optimize for counters	Major	.
HBASE-16890	Analyze the performance of AsyncWAL and fix the same	Blocker	wal
HBASE-19375	Fix import order in hbase-thrift	Trivial	Thrift
HBASE-19373	Fix Checkstyle error in hbase-annotations	Trivial	.
HBASE-19360	Remove unused imports from hbase-zookeeper module	Minor	Zookeeper
HBASE-19301	Provide way for CPs to create short circuited connection with custom configurations	Major	Coprocessors
HBASE-19439	Mark ShortCircuitMasterConnection with InterfaceAudience Private	Major	.
HBASE-19430	Remove the SettableTimestamp and SettableSequenceId	Major	.
HBASE-19295	The Configuration returned by CPEnv should be read-only.	Major	Coprocessors
HBASE-18112	Write RequestTooBigException back to client for NettyRpcServer	Major	IPC/RPC
HBASE-19426	Move has() and setTimestamp() to Mutation	Major	Client
HBASE-19399	Purge curator dependency from hbase-client	Major	Client, Zookeeper
HBASE-19344	improve asyncWAL by using Independent thread for netty #IO in FanOutOneBlockAsyncDFSOutput	Major	wal
HBASE-19346	Use EventLoopGroup to create AsyncFSOutput	Major	wal
HBASE-19362	Remove unused imports from hbase-thrift module	Minor	Thrift
HBASE-19096	Add RowMutions batch support in AsyncTable	Major	.
HBASE-17049	Do not issue sync request when there are still entries in ringbuffer	Critical	wal
HBASE-19242	Add MOB compact support for AsyncAdmin	Blocker	Admin, mob
HBASE-19122	preCompact and preFlush can bypass by returning null scanner; shut it down	Critical	Coprocessors, Scanners
HBASE-19313	Call blockUntilConnected when constructing ZKAsyncRegistry(temporary workaround)	Major	asyncclient, Client, Zookeeper
HBASE-19269	Reenable TestShellRSGroups	Major	test
HBASE-19276	RegionPlan should correctly implement equals and hashCode	Major	.
HBASE-18911	Unify Admin and AsyncAdmin's methods name	Major	.
HBASE-19268	Enable Replica tests that were disabled by Proc-V2 AM in HBASE-14614	Major	test
HBASE-19009	implement modifyTable and enable/disableTableReplication for AsyncAdmin	Major	.
HBASE-18964	Deprecate RowProcessor and processRowsWithLocks() APIs that take RowProcessor as an argument	Major	regionserver
HBASE-19270	Reenable TestRegionMergeTransactionOnCluster#testMergeWithReplicas disable by HBASE-14614	Major	Region Assignment
HBASE-19278	Reenable cleanup in test teardown in TestAccessController3 disabled by HBASE-14614	Major	Region Assignment
HBASE-19235	CoprocessorEnvironment should be exposed to CPs	Minor	Coprocessors
HBASE-19243	Start mini cluster once before class for TestFIFOCompactionPolicy	Major	test
HBASE-18423	Fix TestMetaWithReplicas	Major	test
HBASE-18962	Support atomic BatchOperations through batchMutate()	Major	regionserver
HBASE-19127	Set State.SPLITTING, MERGING, MERGING_NEW, SPLITTING_NEW properly in RegionStatesNode	Major	.
HBASE-19220	Async tests time out talking to zk; 'clusterid came back null'	Major	test
HBASE-19002	Introduce more examples to show how to intercept normal region operations	Minor	Coprocessors
HBASE-18624	Added support for clearing BlockCache based on table name	Major	.
HBASE-19203	Update Hadoop version used for build to 2.7.4	Major	.
HBASE-18961	doMiniBatchMutate() is big, split it into smaller methods	Major	regionserver
HBASE-19197	Move version on branch-2 from 2.0.0-alpha4 to 2.0.0-beta-1.SNAPSHOT	Major	.
HBASE-18950	Remove Optional parameters in AsyncAdmin interface	Blocker	Client
HBASE-19131	Add the ClusterStatus hook and cleanup other hooks which can be replaced by ClusterStatus hook	Major	Coprocessors
HBASE-19095	Add CP hooks in RegionObserver for in memory compaction	Major	Coprocessors
HBASE-19152	Update refguide 'how to build an RC' and the make_rc.sh script	Trivial	build
HBASE-18972	Use Builder pattern to remove nullable parameters for coprocessor methods in RawAsyncTable interface	Blocker	Client
HBASE-19141	[compat 1-2] getClusterStatus always return empty ClusterStatus	Critical	API
HBASE-18770	Remove bypass method in ObserverContext and implement the 'bypass' logic case by case	Critical	Coprocessors
HBASE-18375	The pool chunks from ChunkCreator are deallocated while in pool because there is no reference to them	Critical	.
HBASE-19136	Set branch-2 version to 2.0.0-alpha4 from 2.0.0-alpha4-SNAPSHOT	Major	.
HBASE-19031	Align exist method in Table and AsyncTable interfaces	Critical	asyncclient, Client
HBASE-18995	Move methods that are for internal usage from CellUtil to Private util class	Critical	.
HBASE-18906	Provide Region#waitForFlushes API	Critical	Coprocessors
HBASE-19090	Add config 'hbase.systemtables.compacting.memstore.type' to hbase-default.xml	Major	.
HBASE-19048	Cleanup MasterObserver hooks which takes IA private params	Major	Coprocessors
HBASE-19029	Align RPC timout methods in Table and AsyncTableBase	Critical	asyncclient, Client
HBASE-19057	Fix other code review comments about FilterList Improvement	Blocker	Filters
HBASE-19074	Miscellaneous Observer cleanups	Major	Coprocessors
HBASE-19070	temporarily make the mvnsite nightly test non-voting.	Major	build
HBASE-18754	Get rid of Writable from TimeRangeTracker	Major	.
HBASE-19053	Split out o.a.h.h.http from hbase-server into a separate module	Major	.
HBASE-19069	Do not wrap the original CompactionLifeCycleTracker when calling CP hooks	Blocker	Compaction, Coprocessors
HBASE-18873	Hide protobufs in GlobalQuotaSettings	Critical	.
HBASE-19010	Reimplement getMasterInfoPort for Admin	Major	Client
HBASE-19045	Deprecate RegionObserver#postInstantiateDeleteTracker	Major	Coprocessors
HBASE-18977	Reenable test of filterlist using MUST_PASS_ONE and two familyfilters	Blocker	Filters
HBASE-18945	Make a IA.LimitedPrivate interface for CellComparator	Major	.
HBASE-18960	A few bug fixes and minor improvements around batchMutate()	Major	regionserver
HBASE-18914	Remove AsyncAdmin's methods which were already deprecated in Admin interface	Major	.
HBASE-18954	Make *CoprocessorHost classes private	Major	Coprocessors
HBASE-18966	Use non-sync TimeRangeTracker as a replacement for TimeRange in ImmutableSegment	Major	.
HBASE-18747	Introduce new example and helper classes to tell CP users how to do filtering on scanners	Critical	Coprocessors
HBASE-18411	Dividing FiterList into two separate sub-classes: FilterListWithOR , FilterListWithAND	Major	Filters
HBASE-18108	Procedure WALs are archived but not cleaned; fix	Blocker	proc-v2
HBASE-18867	maven enforcer plugin needs update to work with jdk9	Blocker	build
HBASE-18981	Address issues found by error-prone in hbase-client	Trivial	.
HBASE-18980	Address issues found by error-prone in hbase-hadoop2-compat	Trivial	.
HBASE-18951	Use Builder pattern to remove nullable parameters for checkAndXXX methods in RawAsyncTable/AsyncTable interface	Blocker	asyncclient, Client
HBASE-18160	Fix incorrect logic in FilterList.filterKeyValue	Major	Filters
HBASE-17678	FilterList with MUST_PASS_ONE may lead to redundant cells returned	Major	Filters
HBASE-18957	add test that confirms 2 FamilyFilters in a FilterList using MUST_PASS_ONE operator will return results that match either of the FamilyFilters and revert as needed to make it pass.	Critical	Filters
HBASE-18949	Remove the CompactionRequest parameter in preCompactSelection	Major	Coprocessors
HBASE-18752	Recalculate the TimeRange in flushing snapshot to store file	Major	.
HBASE-18909	Deprecate Admin's methods which used String regex	Major	Admin
HBASE-18931	Make ObserverContext an interface and remove private/testing methods	Major	Coprocessors
HBASE-18933	set version number to 2.0.0-alpha4-SNAPSHOT following release of alpha3	Blocker	build
HBASE-18815	We need to pass something like CompactionRequest in CP to give user some information about the compaction	Major	Coprocessors
HBASE-18105	[AMv2] Split/Merge need cleanup; currently they diverge and do not fully embrace AMv2 world	Major	Region Assignment
HBASE-18753	Introduce the unsynchronized TimeRangeTracker	Major	.
HBASE-18010	Connect CellChunkMap to be used for flattening in CompactingMemStore	Major	.
HBASE-18807	Remove PB references from Observers for Quotas	Major	.
HBASE-18786	FileNotFoundException should not be silently handled for primary region replicas	Major	regionserver, Scanners
HBASE-18823	Apply RegionInfo to MasterObserver/RegionObserver/WALObserver	Major	Coprocessors
HBASE-17980	Any HRegionInfo we give out should be immutable	Major	.
HBASE-18821	Enforcer plugin NPEs again when generating site	Major	website
HBASE-18820	assembly is missing hbase-replication	Major	build
HBASE-18819	Set version number to 2.0.0-alpha3 from 2.0.0-alpha3-SNAPSHOT	Major	.
HBASE-14998	Unify synchronous and asynchronous methods in Admin and cleanup	Blocker	.
HBASE-18718	Document the coprocessor.Export	Major	Coprocessors, documentation, tooling
HBASE-18750	Cleanup the docs saying "HTable use write buffer"	Minor	documentation
HBASE-18779	Move CompareOperator to hbase-client module	Critical	.
HBASE-18769	Make CompareFilter use generic CompareOperator instead of internal enum	Major	.
HBASE-14997	Move compareOp and Comparators out of filter to client package	Critical	.
HBASE-18697	Need a shaded hbase-mapreduce module	Major	mapreduce
HBASE-18749	Apply the CF specific TimeRange from Scan to filter the segment scanner	Minor	.
HBASE-18739	Make all TimeRange Constructors InterfaceAudience Private.	Major	API
HBASE-18721	Cleanup unused configs and private declaration	Minor	.
HBASE-18700	Document the new changes on mapreduce stuffs	Major	mapreduce
HBASE-18698	MapreduceDependencyClasspathTool does not include hbase-server as a dependency	Major	mapreduce
HBASE-18692	[compat 1-2] ByteBufferUtils.copyFromBufferToBuffer goes from void to int	Major	API
HBASE-18691	[compat 1-2] HCD remove and removeConfiguration change return type	Major	API
HBASE-18688	Upgrade commons-codec to 1.10	Major	dependencies
HBASE-16324	Remove LegacyScanQueryMatcher	Critical	Compaction, regionserver
HBASE-18687	Add @since 2.0.0 to new classes	Major	API
HBASE-18448	EndPoint example for refreshing HFiles for stores	Minor	Coprocessors
HBASE-18656	Address issues found by error-prone in hbase-common	Major	build
HBASE-18658	Purge hokey hbase Service implementation; use (internal) Guava Service instead	Major	.
HBASE-18347	Implement a BufferedMutator for async client	Major	asyncclient, Client
HBASE-18503	Change ***Util and Master to use TableDescriptor and ColumnFamilyDescriptor	Major	.
HBASE-18103	[AMv2] If Master gives OPEN to another, if original eventually succeeds, Master will kill it	Critical	master, proc-v2
HBASE-18489	Expose scan cursor in RawScanResultConsumer	Major	asyncclient, Client, scan
HBASE-18608	AsyncConnection should return AsyncAdmin interface instead of the implemenation	Major	Client
HBASE-18595	Set version in branch-2 from 2.0.0-alpha2-SNAPSHOT to 2.0.0-alpha2	Major	.
HBASE-18553	Expose scan cursor for asynchronous scanner	Major	.
HBASE-17994	Add async client test to Performance Evaluation tool	Major	.
HBASE-18424	Fix TestAsyncTableGetMultiThreaded	Major	test
HBASE-18238	Address ruby static analysis for bin directory	Major	.
HBASE-18593	Tell m2eclipse what to do w/ replacer plugin	Trivial	build
HBASE-18271	Shade netty	Blocker	rpc
HBASE-18398	Snapshot operation fails with FileNotFoundException	Major	snapshots
HBASE-18315	Eliminate the findbugs warnings for hbase-rest	Major	.
HBASE-18102	[SHELL] Purge close_region command that allows by-pass of Master	Major	Operability, shell
HBASE-18231	Deprecate and throw unsupported operation when Admin#closeRegion is called.	Critical	Admin
HBASE-18367	Reduce ProcedureInfo usage	Major	master, proc-v2
HBASE-18107	[AMv2] Remove DispatchMergingRegionsRequest & DispatchMergingRegions	Major	Region Assignment
HBASE-18428	IntegrationTestDDLMasterFailover uses old-style immutable column descriptors	Major	integration tests
HBASE-18419	Update IntegrationTestIngestWithMOB and Actions to use ColumnFamily builders for modification	Critical	integration tests
HBASE-18420	Some methods of Admin don't use ColumnFamilyDescriptor	Major	.
HBASE-17738	BucketCache startup is slow	Major	BucketCache
HBASE-18308	Eliminate the findbugs warnings for hbase-server	Major	.
HBASE-18052	Add document for async admin	Major	Client
HBASE-18229	create new Async Split API to embrace AM v2	Critical	proc-v2
HBASE-18342	Add coprocessor service support for async admin	Major	Client
HBASE-17922	TestRegionServerHostname always fails against hadoop 3.0.0-alpha2	Major	hadoop3
HBASE-18365	Eliminate the findbugs warnings for hbase-common	Major	.
HBASE-18343	Track the remaining unimplemented methods for async admin	Major	Client
HBASE-18268	Eliminate the findbugs warnings for hbase-client	Major	Client
HBASE-18295	The result contains the cells across different rows	Blocker	Scanners
HBASE-18318	Implement updateConfiguration/stopMaster/stopRegionServer/shutdown methods	Major	Client
HBASE-18316	Implement async admin operations for draining region servers	Major	Client
HBASE-18317	Implement async admin operations for Normalizer/CleanerChore/CatalogJanitor	Major	Client
HBASE-18319	Implement getClusterStatus/getRegionLoad/getCompactionState/getLastMajorCompactionTimestamp methods	Major	Client
HBASE-18002	Investigate why bucket cache filling up in file mode in an exisiting file is slower	Major	BucketCache
HBASE-17201	Edit of HFileBlock comments and javadoc	Major	documentation
HBASE-18240	Add hbase-thirdparty, a project with hbase utility including an hbase-shaded-thirdparty module with guava, netty, etc.	Major	dependencies, shading
HBASE-18297	Provide a AsyncAdminBuilder to create new AsyncAdmin instance	Major	Client
HBASE-18314	Eliminate the findbugs warnings for hbase-examples	Major	.
HBASE-18264	Update pom plugins	Major	.
HBASE-18283	Provide a construct method which accept a thread pool for AsyncAdmin	Major	Client
HBASE-18293	Only add the spotbugs dependency when jdk8 is active	Major	build
HBASE-18239	Address ruby static analysis for shell module	Major	.
HBASE-14902	Revert some of the stringency recently introduced by checkstyle tightening	Major	.
HBASE-18272	Fix issue about RSGroupBasedLoadBalancer#roundRobinAssignment where BOGUS_SERVER_NAME is involved in two groups	Major	Balancer
HBASE-18234	Revisit the async admin api	Major	Client
HBASE-18221	Switch from pread to stream should happen under HStore's reentrant lock	Major	Scanners
HBASE-16242	Upgrade Avro to 1.7.7	Major	dependencies
HBASE-18104	[AMv2] Enable aggregation of RPCs (assigns/unassigns, etc.)	Major	Region Assignment
HBASE-18213	Add documentation about the new async client	Major	asyncclient, Client, documentation
HBASE-18220	Compaction scanners need not reopen storefile scanners while trying to switch over from pread to stream	Major	Compaction
HBASE-17008	Examples to make AsyncClient go down easy	Critical	asyncclient, Client
HBASE-18109	Assign system tables first (priority)	Critical	Region Assignment
HBASE-18008	Any HColumnDescriptor we give out should be immutable	Major	.
HBASE-18190	Set version in branch-2 to 2.0.0-alpha-1	Major	.
HBASE-18191	Include hbase-metrics-* in assembly	Major	.
HBASE-16392	Backup delete fault tolerance	Major	.
HBASE-15160	Put back HFile's HDFS op latency sampling code and add metrics for monitoring	Critical	.
HBASE-16549	Procedure v2 - Add new AM metrics	Major	proc-v2, Region Assignment
HBASE-15995	Separate replication WAL reading from shipping	Major	Replication
HBASE-17530	Readd TestMergeTableRegionsProcedure mistakenly removed by HBASE-16786	Critical	test
HBASE-16543	Separate Create/Modify Table operations from open/reopen regions	Major	master
HBASE-16261	MultiHFileOutputFormat Enhancement	Major	hbase, mapreduce
HBASE-18115	Move SaslServer creation to HBaseSaslRpcServer	Major	IPC/RPC
HBASE-18114	Update the config of TestAsync*AdminApi to make test stable	Major	Client
HBASE-17066	Procedure v2 - Add handling of merge region transition to the new AM	Major	proc-v2, Region Assignment
HBASE-18091	Add API for who currently holds a lock on namespace/ table/ region and log when state is LOCK_EVENT_WAIT	Major	proc-v2
HBASE-18013	Write response directly instead of creating a fake call when setup connection	Major	IPC/RPC
HBASE-17850	Backup system repair utility	Major	.
HBASE-18068	Fix flaky test TestAsyncSnapshotAdminApi	Major	Client
HBASE-18016	Implement abort for TruncateTableProcedure	Major	proc-v2
HBASE-18018	Support abort for all procedures by default	Major	proc-v2
HBASE-16851	User-facing documentation for the In-Memory Compaction feature	Major	.
HBASE-16436	Add the CellChunkMap variant	Major	regionserver
HBASE-18012	Move RpcServer.Connection to a separated file	Major	IPC/RPC
HBASE-17938	General fault - tolerance framework for backup/restore operations	Major	.
HBASE-17786	Create LoadBalancer perf-tests (test balancer algorithm decoupled from workload)	Major	Balancer, proc-v2
HBASE-17887	Row-level consistency is broken for read	Blocker	regionserver
HBASE-17917	Use pread by default for all user scan and switch to streaming read if needed	Major	scan
HBASE-17977	Enabled Master observer to delete quotas on table deletion by default	Major	.
HBASE-17667	Implement async flush/compact region methods	Major	Admin, asyncclient, Client
HBASE-17978	Investigate hbase superuser permissions in the face of quota violation	Major	.
HBASE-17981	Roll list_quota_violations into list_quota_snapshots	Major	.
HBASE-17867	Implement async procedure RPC API(list/exec/abort/isFinished)	Major	Client
HBASE-17263	Netty based rpc server impl	Major	Performance, rpc
HBASE-17976	Remove stability annotation from public audience-marked classes	Major	.
HBASE-17955	Commit Reviewboard comments from Vlad	Major	.
HBASE-17920	TestFSHDFSUtils always fails against hadoop 3.0.0-alpha2	Major	hadoop3
HBASE-17865	Implement async listSnapshot/deleteSnapshot methods.	Major	Client
HBASE-16942	Add FavoredStochasticLoadBalancer and FN Candidate generators	Major	FavoredNodes
HBASE-17873	Change the IA.Public annotation to IA.Private for unstable API	Blocker	API
HBASE-15583	Any HTableDescriptor we give out should be immutable	Minor	.
HBASE-15143	Procedure v2 - Web UI displaying queues	Minor	proc-v2, UI
HBASE-17952	The new options for PE tool do not work	Major	Performance, test
HBASE-16314	Retry on table snapshot failure during full backup	Major	.
HBASE-17864	Implement async snapshot/cloneSnapshot/restoreSnapshot methods	Major	Client
HBASE-17915	Implement async replication admin methods	Major	Client
HBASE-17929	Add more options for PE tool	Major	Performance, test
HBASE-16438	Create a cell type so that chunk id is embedded in it	Major	regionserver
HBASE-17925	mvn assembly:single fails against hadoop3-alpha2	Major	hadoop3
HBASE-17866	Implement async setQuota/getQuota methods.	Major	Client
HBASE-17897	StripeStoreFileManager#nonOpenRowCompare use the wrong comparison function	Major	.
HBASE-17895	TestAsyncProcess#testAction fails if unsafe support is false	Trivial	test
HBASE-17896	The FIXED_OVERHEAD of Segment is incorrect	Minor	.
HBASE-16477	Remove Writable interface and related code from WALEdit/WALKey	Major	wal
HBASE-17872	The MSLABImpl generates the invaild cells when unsafe is not availble	Critical	.
HBASE-17881	Remove the ByteBufferCellImpl	Minor	test
HBASE-17858	Update refguide about the IS annotation if necessary	Major	API, documentation
HBASE-16217	Identify calling user in ObserverContext	Major	Coprocessors, security
HBASE-17857	Remove IS annotations from IA.Public classes	Major	API
HBASE-17859	ByteBufferUtils#compareTo is wrong	Critical	.
HBASE-17668	Implement async assgin/offline/move/unassign methods	Major	Admin, asyncclient, Client
HBASE-17855	Fix typo in async client implementation	Major	asyncclient, Client
HBASE-17844	Subset of HBASE-14614, Procedure v2: Core Assignment Manager (non-critical related changes)	Major	Region Assignment
HBASE-17520	Implement isTableEnabled/Disabled/Available methods	Major	Client
HBASE-17765	Reviving the merge possibility in the CompactingMemStore	Major	.
HBASE-13395	Remove HTableInterface	Major	API
HBASE-17669	Implement async mergeRegion/splitRegion methods.	Major	Admin, asyncclient, Client
HBASE-17809	cleanup unused class	Major	.
HBASE-17805	We should remove BoundedByteBufferPool because it is replaced by ByteBufferPool	Minor	.
HBASE-17447	Automatically delete quota when table is deleted	Major	.
HBASE-17003	Update book for filesystem use quotas	Major	documentation
HBASE-17794	Remove lingering "violation" in favor of the accurate "snapshot"	Trivial	.
HBASE-17691	Add ScanMetrics support for async scan	Major	Client
HBASE-15314	Allow more than one backing file in bucketcache	Major	BucketCache
HBASE-17790	Mark ReplicationAdmin's peerAdded and listReplicationPeers as Deprecated	Minor	Replication
HBASE-17740	Correct the semantic of batch and partial for async client	Critical	asyncclient, Client, scan
HBASE-17338	Treat Cell data size under global memstore heap size only when that Cell can not be copied to MSLAB	Major	regionserver
HBASE-17745	Support short circuit connection for master services	Major	.
HBASE-17600	Implement get/create/modify/delete/list namespace admin operations	Major	Client
HBASE-17002	[Master] Report quotas and active violations on Master UI and JMX metrics	Major	master, UI
HBASE-17568	Expire region reports in the HMaster	Major	.
HBASE-15484	Correct the semantic of batch and partial	Blocker	Client, scan
HBASE-17602	Tweak chore delay/period defaults	Trivial	.
HBASE-17516	Table quota not taking precedence over namespace quota	Major	.
HBASE-17646	Implement Async getRegion method	Major	asyncclient
HBASE-17662	Disable in-memory flush when replaying from WAL	Major	.
HBASE-17428	Expand on shell commands for detailed insight	Major	shell
HBASE-16991	Make the initialization of AsyncConnection asynchronous	Minor	Client
HBASE-17608	Add suspend support for RawScanResultConsumer	Major	asyncclient, Client, scan
HBASE-17561	table status page should escape values that may contain arbitrary characters.	Major	master, UI
HBASE-17210	Set timeout on trying rowlock according to client's RPC timeout	Major	.
HBASE-17478	Avoid sending FSUtilization reports to master when quota support is not enabled	Trivial	.
HBASE-17025	[Shell] Support space quota get/set via the shell	Major	shell
HBASE-17644	Always create ByteBufferCells after copying to MSLAB	Major	regionserver
HBASE-17619	Add async admin Impl which connect to RegionServer and implement close region methods.	Major	asyncclient
HBASE-17656	Move new Address class from util to net package	Minor	rsgroup
HBASE-17583	Add inclusive/exclusive support for startRow and endRow of scan for sync client	Major	Client, scan
HBASE-17259	Missing functionality to remove space quota	Major	.
HBASE-17001	[RegionServer] Implement enforcement of quota violation policies	Major	regionserver
HBASE-17575	Run critical tests with each of the Inmemory Compaction Policies enabled (Towards Making BASIC the Default In-Memory Compaction Policy)	Major	test
HBASE-17484	Add non cached version of OffheapKV for write path	Major	regionserver
HBASE-17389	Convert all internal usages from ReplicationAdmin to Admin	Major	.
HBASE-17402	TestAsyncTableScan sometimes hangs	Major	Client
HBASE-17350	Fixup of regionserver group-based assignment	Critical	regionserver, rsgroup
HBASE-16999	[Master] Inform RegionServers on size quota violations	Major	.
HBASE-17596	Implement add/delete/modify column family methods	Major	Client
HBASE-17349	Add doc for regionserver group-based assignment	Critical	regionserver, rsgroup
HBASE-17511	Implement enable/disable table methods	Major	Client
HBASE-17281	FN should use datanode port from hdfs configuration	Minor	FavoredNodes
HBASE-17198	FN updates during region merge (follow up to Procedure v2 merge)	Major	FavoredNodes
HBASE-17101	FavoredNodes should not apply to system tables	Major	FavoredNodes
HBASE-17346	Add coprocessor service support	Major	asyncclient, Client, Coprocessors
HBASE-17566	Jetty upgrade fixes	Major	REST, UI
HBASE-17562	Remove documentation for coprocessor execution times after HBASE-14205	Major	Coprocessors, Performance, regionserver
HBASE-16998	[Master] Analyze table use reports and update quota violations	Major	.
HBASE-17557	HRegionServer#reportRegionSizesForQuotas() should respond to UnsupportedOperationException	Major	.
HBASE-17526	Procedure v2 - cleanup isSuspended from MasterProcedureScheduler#Queue	Minor	proc-v2
HBASE-17500	Implement getTable/creatTable/deleteTable/truncateTable methods	Major	Client
HBASE-17045	Unify the implementation of small scan and regular scan	Major	Client, scan
HBASE-17443	Move listReplicated/enableTableRep/disableTableRep methods from ReplicationAdmin to Admin	Major	.
HBASE-17492	Fix the compacting memstore part in hbase shell ruby script	Major	.
HBASE-17491	Remove all setters from HTable interface and introduce a TableBuilder to build Table instance	Major	.
HBASE-17067	Procedure v2 - remove tryAcquire*Lock and use wait/wake to make framework event based	Major	proc-v2
HBASE-17367	Make HTable#getBufferedMutator thread safe	Major	.
HBASE-17497	Add first async MetaTableAccessor impl and Implement tableExists method	Major	Client
HBASE-17498	Implement listTables and listTableNames methods	Major	Client
HBASE-16831	Procedure V2 - Remove org.apache.hadoop.hbase.zookeeper.lock	Minor	.
HBASE-16867	Procedure V2 - Check ACLs for remote HBaseLock	Major	.
HBASE-17480	Remove split region code from Region Server	Major	Region Assignment
HBASE-17396	Add first async admin impl and implement balance methods	Major	Client
HBASE-17483	Add equals/hashcode for OffheapKeyValue	Major	regionserver
HBASE-17081	Flush the entire CompactingMemStore content to disk	Major	.
HBASE-17372	Make AsyncTable thread safe	Major	asyncclient, Client
HBASE-16744	Procedure V2 - Lock procedures to allow clients to acquire locks on tables/namespaces/regions	Major	.
HBASE-17416	Use isEmpty instead of size() == 0 in hbase-protocol-shaded	Minor	.
HBASE-14061	Support CF-level Storage Policy	Major	HFile, regionserver
HBASE-17337	list replication peers request should be routed through master	Major	.
HBASE-12148	Remove TimeRangeTracker as point of contention when many threads writing a Store	Major	Performance
HBASE-15172	Support setting storage policy in bulkload	Major	.
HBASE-17388	Move ReplicationPeer and other replication related PB messages to the replication.proto	Major	Replication
HBASE-17409	Re-fix XSS request issue in JMXJsonServlet	Major	security, UI
HBASE-17410	Use isEmpty instead of size() == 0 in hbase-client	Minor	Client
HBASE-17373	Reverse the order of snapshot creation in the CompactingMemStore	Major	.
HBASE-17336	get/update replication peer config requests should be routed through master	Major	.
HBASE-17149	Procedure V2 - Fix nonce submission to avoid unnecessary calling coprocessor multiple times	Major	proc-v2
HBASE-17320	Add inclusive/exclusive support for startRow and endRow of scan	Major	Client, scan
HBASE-17090	Procedure v2 - fast wake if nothing else is running	Major	proc-v2
HBASE-17068	Procedure v2 - inherit region locks	Major	master, proc-v2
HBASE-16524	Procedure v2 - Compute WALs cleanup on wal modification and not on every sync	Minor	proc-v2
HBASE-17345	Implement batch	Major	asyncclient, Client
HBASE-17335	enable/disable replication peer requests should be routed through master	Major	.
HBASE-17334	Add locate row before/after support for AsyncRegionLocator	Major	Client
HBASE-17262	Refactor RpcServer so as to make it extendable and/or pluggable	Major	rpc
HBASE-11392	add/remove peer requests should be routed through master	Critical	.
HBASE-17107	FN info should be cleaned up on region/table cleanup	Major	FavoredNodes
HBASE-17142	Implement multi get	Major	asyncclient, Client
HBASE-17282	Reduce the redundant requests to meta table	Major	Client
HBASE-17148	Procedure v2 - add bulk proc submit	Minor	master, proc-v2
HBASE-16398	optimize HRegion computeHDFSBlocksDistribution	Major	regionserver
HBASE-15787	Change the flush related heuristics to work with offheap size configured	Major	regionserver
HBASE-17000	[RegionServer] Compute region filesystem space use and report to Master	Major	regionserver
HBASE-17316	Addendum to HBASE-17294, 'External Configuration for Memory Compaction'	Major	.
HBASE-17313	Add BufferedMutatorParams#clone method	Major	Client
HBASE-17277	Allow alternate BufferedMutator implementation	Major	.
HBASE-17294	External Configuration for Memory Compaction	Major	.
HBASE-16336	Removing peers seems to be leaving spare queues	Major	Replication
HBASE-17251	Add a timeout parameter when locating region	Major	asyncclient, Client
HBASE-16941	FavoredNodes - Split/Merge code paths	Major	FavoredNodes
HBASE-17260	Procedure v2 - Add setOwner() overload taking a User instance	Trivial	proc-v2
HBASE-16996	Implement storage/retrieval of filesystem-use quotas into quota table	Major	.
HBASE-17111	Use Apache CLI in SnapshotInfo tool	Major	.
HBASE-16648	[JDK8] Use computeIfAbsent instead of get and putIfAbsent	Major	Performance
HBASE-17167	Pass mvcc to client when scan	Major	Client, scan
HBASE-17012	Handle Offheap cells in CompressedKvEncoder	Major	regionserver
HBASE-17048	Calcuate suitable ByteBuf size when allocating send buffer in FanOutOneBlockAsyncDFSOutput	Major	wal
HBASE-17183	Handle ByteBufferCell while making TagRewriteCell	Major	regionserver
HBASE-17162	Avoid unconditional call to getXXXArray() in write path	Major	regionserver
HBASE-17169	Remove Cell variants with ShareableMemory	Major	regionserver
HBASE-16984	Implement getScanner	Major	Client
HBASE-15786	Create DBB backed MSLAB pool	Major	regionserver
HBASE-17141	Introduce a more user-friendly implementation of AsyncTable	Major	asyncclient, Client
HBASE-16995	Build client Java API and client protobuf messages	Major	Client
HBASE-17139	Remove sweep tool related configs from hbase-default.xml	Major	.
HBASE-16956	Refactor FavoredNodePlan to use regionNames as keys	Minor	FavoredNodes
HBASE-17085	AsyncFSWAL may issue unnecessary AsyncDFSOutput.sync	Major	wal
HBASE-16169	Make RegionSizeCalculator scalable	Major	mapreduce, scaling
HBASE-17073	Increase the max number of buffers in ByteBufferPool	Major	.
HBASE-17087	Enable Aliasing for CodedInputStream created by ByteInputByteString#newCodedInput	Major	regionserver
HBASE-17089	Add doc on experience running with hedged reads	Major	documentation
HBASE-15788	Use Offheap ByteBuffers from BufferPool to read RPC requests.	Major	regionserver
HBASE-16838	Implement basic scan	Major	asyncclient, Client
HBASE-17071	Do not initialize MemstoreChunkPool when use mslab option is turned off	Major	.
HBASE-16570	Compute region locality in parallel at startup	Major	.
HBASE-17053	Remove LogRollerExitedChecker	Major	wal
HBASE-17035	Check why we roll a wal writer at 10MB when the configured roll size is 120M+ with AsyncFSWAL	Major	wal
HBASE-17021	Use RingBuffer to reduce the contention in AsyncFSWAL	Major	wal
HBASE-16982	Better integrate Apache CLI in AbstractHBaseTool	Major	.
HBASE-17050	Upgrade Apache CLI version from 1.2 to 1.3.1	Minor	.
HBASE-17030	Procedure v2 - A couple of tweaks to the SplitTableRegionProcedure	Trivial	proc-v2
HBASE-16937	Replace SnapshotType protobuf conversion when we can directly use the pojo object	Trivial	snapshots
HBASE-16892	Use TableName instead of String in SnapshotDescription	Trivial	snapshots
HBASE-16865	Procedure v2 - Inherit lock from root proc	Major	proc-v2
HBASE-16970	Clarify misleading Scan.java comment about caching	Trivial	.
HBASE-16986	Add note on how scanner caching has changed since 0.98 to refguid	Minor	documentation
HBASE-16608	Introducing the ability to merge ImmutableSegments without copy-compaction or SQM usage	Major	.
HBASE-16945	Implement AsyncRegionLocator	Major	Client
HBASE-16968	Refactor FanOutOneBlockAsyncDFSOutput	Major	io, wal
HBASE-16954	Unify HTable#checkAndDelete with AP	Minor	.
HBASE-16891	Try copying to the Netty ByteBuf directly from the WALEdit	Major	wal
HBASE-16932	Implement small scan	Major	Client
HBASE-16835	Revisit the zookeeper usage at client side	Major	Client, Zookeeper
HBASE-15709	Handle large edits for asynchronous WAL	Critical	io, wal
HBASE-15789	PB related changes to work with offheap	Major	regionserver
HBASE-16871	Procedure v2 - add waiting procs back to the queue after restart	Major	proc-v2
HBASE-16872	Implement mutateRow and checkAndMutate	Major	Client
HBASE-16874	Fix TestMasterFailoverWithProcedures and ensure single proc-executor for kill/restart tests	Minor	proc-v2
HBASE-16864	Procedure v2 - Fix StateMachineProcedure support for child procs at last step	Major	proc-v2
HBASE-16837	Implement checkAndPut and checkAndDelete	Major	Client
HBASE-16836	Implement increment and append	Major	Client
HBASE-16846	Procedure v2 - executor cleanup	Minor	proc-v2
HBASE-16834	Add AsyncConnection support for ConnectionFactory	Major	Client
HBASE-16839	Procedure v2 - Move all protobuf handling to ProcedureUtil	Minor	proc-v2
HBASE-16642	Procedure V2: Use DelayQueue instead of TimeoutBlockingQueue	Minor	proc-v2
HBASE-16813	Procedure v2 - Move ProcedureEvent to hbase-procedure module	Major	proc-v2
HBASE-16735	Procedure v2 - Fix yield while holding locks	Major	proc-v2
HBASE-16505	Save deadline in RpcCallContext according to request's timeout	Major	.
HBASE-15561	See how G1GC works with MSLAB and chunk pool	Major	.
HBASE-16802	Procedure v2 - group procedure cleaning	Trivial	proc-v2
HBASE-16146	Counters are expensive...	Major	metrics
HBASE-16788	Race in compacted file deletion between HStore close() and closeAndArchiveCompactedFiles()	Blocker	regionserver
HBASE-14734	BindException when setting up MiniKdc	Major	flakey, test
HBASE-15984	Given failure to parse a given WAL that was closed cleanly, replay the WAL.	Critical	Replication
HBASE-15721	Optimization in cloning cells into MSLAB	Major	regionserver
HBASE-16372	References to previous cell in read path should be avoided	Blocker	Scanners
HBASE-16759	Avoid ByteString.copyFrom usage wherever possible	Major	Protobufs
HBASE-16758	Bring back HBaseZeroCopyByteStringer stuff	Major	Protobufs
HBASE-16760	Deprecate ByteString related methods in Bytes.java	Major	Protobufs
HBASE-16741	Amend the generate protobufs out-of-band build step to include shade, pulling in protobuf source and a hook for patching protobuf	Major	Protobufs
HBASE-16264	Figure how to deal with endpoints and shaded pb	Critical	Coprocessors, Protobufs
HBASE-16742	Add chapter for devs on how we do protobufs going forward	Major	documentation
HBASE-16738	L1 cache caching shared memory HFile block when blocks promoted from L2 to L1	Major	regionserver, Scanners
HBASE-16134	Introduce Cell extension for server side.	Major	regionserver
HBASE-16695	Procedure v2 - Support for parent holding locks	Major	proc-v2
HBASE-16587	Procedure v2 - Cleanup suspended proc execution	Major	proc-v2
HBASE-16651	LRUBlockCache#returnBlock should try return block to Victim Handler L2 cache.	Major	regionserver, Scanners
HBASE-16554	Procedure V2 - Recover 'updated' part of WAL tracker if trailer is corrupted.	Major	.
HBASE-7612	[JDK8] Replace use of high-scale-lib counters with intrinsic facilities	Trivial	metrics
HBASE-16534	Procedure v2 - Perf Tool for Scheduler	Major	proc-v2, tooling
HBASE-16586	Procedure v2 - Cleanup sched wait/lock semantic	Major	proc-v2
HBASE-16626	User customized RegionScanner from 1.X is incompatible with 2.0.0's off-heap part	Major	Offheaping
HBASE-16618	Procedure v2 - Add base class for table and ns procedures	Minor	master, proc-v2
HBASE-16229	Cleaning up size and heapSize calculation	Major	.
HBASE-16592	Unify Delete request with AP	Major	.
HBASE-16596	Reduce redundant interfaces in AsyncProcess	Major	.
HBASE-16530	Reduce DBE code duplication	Major	Performance
HBASE-16445	Refactor and reimplement RpcClient	Major	IPC/RPC, rpc
HBASE-16516	Revisit the implementation of PayloadCarryingRpcController	Major	rpc
HBASE-16101	Procedure v2 - Perf Tool for WAL	Major	proc-v2, tooling
HBASE-16311	Audit log for delete snapshot operation is missing in case of snapshot owner deleting the same	Minor	snapshots
HBASE-16519	Procedure v2 - Avoid sync wait on DDLs operation	Major	master, proc-v2
HBASE-16507	Procedure v2 - Force DDL operation to always roll forward	Minor	master, proc-v2
HBASE-16526	Add more ipc tests	Major	rpc, test
HBASE-16532	Procedure-V2: Enforce procedure ownership at submission	Major	proc-v2
HBASE-16531	Move cell block related code out of IPCUtil	Major	rpc
HBASE-16533	Procedure v2 - Extract chore from the executor	Minor	proc-v2
HBASE-16522	Procedure v2 - Cache system user and avoid IOException	Major	master, proc-v2
HBASE-16082	Procedure v2 - Move out helpers from MasterProcedureScheduler	Trivial	proc-v2
HBASE-16510	Reset RpcController before retry	Major	rpc
HBASE-16407	Handle MemstoreChunkPool size when HeapMemoryManager tunes memory	Major	.
HBASE-16433	Remove AsyncRpcChannel related stuffs	Major	rpc
HBASE-16474	Remove dfs.support.append related code and documentation	Major	fs, regionserver, wal
HBASE-16451	Procedure v2 - Test WAL protobuf entry size limit	Minor	proc-v2
HBASE-14921	Inmemory Compaction Optimizations; Segment Structure	Major	.
HBASE-16485	Procedure V2 - Add support to addChildProcedure() as last "step" in StateMachineProcedure	Minor	proc-v2
HBASE-16440	MemstoreChunkPool might cross its maxCount of chunks to pool	Major	.
HBASE-16318	fail build if license isn't in whitelist	Major	build, dependencies
HBASE-16452	Procedure v2 - Make ProcedureWALPrettyPrinter extend Tool	Minor	proc-v2
HBASE-16405	Change read path Bloom check to work with Cells with out any copy	Major	Compaction
HBASE-16094	Procedure v2 - Improve cleaning up of proc wals	Major	proc-v2
HBASE-16378	Procedure v2 - Make ProcedureException extend HBaseException	Trivial	proc-v2
HBASE-16404	Make DeleteBloomFilters work with BloomContext	Minor	Compaction
HBASE-15554	StoreFile$Writer.appendGeneralBloomFilter generates extra KV	Major	Performance
HBASE-16308	Contain protobuf references	Major	Protobufs
HBASE-16285	Drop RPC requests if it must be considered as timeout at client	Major	.
HBASE-16263	Move all to do w/ protobuf -- *.proto files and generated classes -- under hbase-protocol	Major	Protobufs
HBASE-16317	revert all ESAPI changes	Blocker	dependencies, security
HBASE-16286	When TagRewriteCell are not copied to MSLAB, deep clone it while adding to Memstore	Major	regionserver
HBASE-16280	Use hash based map in SequenceIdAccounting	Major	wal
HBASE-16205	When Cells are not copied to MSLAB, deep clone it while adding to Memstore	Critical	regionserver
HBASE-14552	Procedure V2: Reimplement DispatchMergingRegionHandler	Major	proc-v2
HBASE-16236	Typo in javadoc of InstancePending	Trivial	Zookeeper
HBASE-16233	Procedure V2: Support acquire/release shared table lock concurrently	Major	proc-v2
HBASE-16219	Move meta bootstrap out of HMaster	Trivial	master, Region Assignment
HBASE-15305	Fix a couple of incorrect anchors in HBase ref guide	Major	documentation
HBASE-16195	Should not add chunk into chunkQueue if not using chunk pool in HeapMemStoreLAB	Major	.
HBASE-16208	Make TableBasedReplicationQueuesImpl check that queue exists before attempting to remove it	Major	Replication
HBASE-16214	Add in UI description of Replication Table	Minor	Replication
HBASE-16092	Procedure v2 - complete child procedure support	Minor	proc-v2
HBASE-16194	Should count in MSLAB chunk allocation into heap size change when adding duplicate cells	Major	regionserver
HBASE-16176	Bug fixes/improvements on HBASE-15650 Remove TimeRangeTracker as point of contention when many threads reading a StoreFile	Major	Performance
HBASE-15935	Have a separate Walker task running concurrently with Generator	Minor	integration tests
HBASE-16162	Compacting Memstore : unnecessary push of active segments to pipeline	Critical	.
HBASE-15985	clarify promises about edits from replication in ref guide	Major	documentation, Replication
HBASE-16163	Compacting Memstore : CompactionPipeline#addFirst can use LinkedList#addFirst	Minor	.
HBASE-16164	Missing close of new compacted segments in few occasions which might leak MSLAB chunks from pool	Critical	.
HBASE-16155	Compacting Memstore : Few log improvements	Minor	.
HBASE-16153	Correct the config name 'hbase.memestore.inmemoryflush.threshold.factor'	Trivial	.
HBASE-16143	Change MemstoreScanner constructor to accept List<KeyValueScanner>	Minor	.
HBASE-16121	Require only MasterServices to the ServerManager constructor	Trivial	master
HBASE-16068	Procedure v2 - use consts for conf properties in tests	Trivial	proc-v2, test
HBASE-16083	Fix table based replication related configs	Trivial	Replication
HBASE-16080	Fix flakey tests	Critical	Replication
HBASE-16036	Fix ReplicationTableBase initialization to make it non-blocking	Major	Replication
HBASE-14878	maven archetype: client application with shaded jars	Major	build, Usability
HBASE-14877	maven archetype: client application	Major	build, Usability
HBASE-16056	Procedure v2 - fix master crash for FileNotFound	Minor	proc-v2
HBASE-16038	Ignore JVM crashes or machine shutdown failures in report-flakies	Major	.
HBASE-15999	NPE in MemstoreCompactor	Critical	.
HBASE-16034	Fix ProcedureTestingUtility#LoadCounter.setMaxProcId()	Minor	proc-v2, test
HBASE-15974	Create a ReplicationQueuesClientHBaseImpl	Major	Replication
HBASE-16023	Fastpath for the FIFO rpcscheduler	Major	Performance, rpc
HBASE-15525	OutOfMemory could occur when using BoundedByteBufferPool during RPC bursts	Critical	IPC/RPC
HBASE-15991	CompactingMemstore#InMemoryFlushRunnable should implement Comparable/Comparator	Critical	.
HBASE-15272	Add error handling for split and compact actions in table.jsp	Major	UI
HBASE-15994	Allow selection of RpcSchedulers	Major	.
HBASE-15107	Procedure V2 - Procedure Queue with Regions	Major	proc-v2
HBASE-15948	Port "HADOOP-9956 RPC listener inefficiently assigns connections to readers"	Major	IPC/RPC
HBASE-15174	Client Public API should not have PB objects in 2.0	Blocker	.
HBASE-15883	Adding WAL files and tracking offsets in HBase.	Major	Replication
HBASE-15927	Remove HMaster.assignRegion()	Trivial	test
HBASE-15917	Flaky tests dashboard	Major	.
HBASE-15919	Document @Rule vs @ClassRule. Also clarify timeout limits are on TestCase.	Minor	.
HBASE-15915	Set timeouts on hanging tests	Major	.
HBASE-15896	Add timeout tests to flaky list from report-flakies.py	Major	test
HBASE-14920	Compacting Memstore	Major	.
HBASE-15872	Split TestWALProcedureStore	Trivial	proc-v2, test
HBASE-15865	Move TestTableDeleteFamilyHandler and TestTableDescriptorModification handler tests to procedure	Trivial	test
HBASE-15651	Add report-flakies.py to use jenkins api to get failing tests	Major	.
HBASE-15825	Fix the null pointer in DynamicLogicExpressionSuite	Major	.
HBASE-15813	Rename DefaultWALProvider to a more specific name and clean up unnecessary reference to it	Major	wal
HBASE-15785	Unnecessary lock in ByteBufferArray	Major	regionserver, Scanners
HBASE-15740	Replication source.shippedKBs metric is undercounting because it is in KB	Major	.
HBASE-15776	Replace master.am.getTableStateManager() with the direct master.getTableStateManager()	Trivial	master
HBASE-15778	replace master.am and master.sm direct access with getter calls	Trivial	master
HBASE-15743	Add Transparent Data Encryption support for FanOutOneBlockAsyncDFSOutput	Major	wal
HBASE-15763	Isolate Wal related stuff from MasterFileSystem	Trivial	master, wal
HBASE-15754	Add testcase for AES encryption	Major	wal
HBASE-15337	Document date tiered compaction in the book	Major	documentation
HBASE-15675	Add more details about region on table.jsp	Major	.
HBASE-15658	RegionServerCallable / RpcRetryingCaller clear meta cache on retries	Critical	Client
HBASE-15735	Tightening of the CP contract	Major	regionserver, Scanners
HBASE-15477	Do not save 'next block header' when we cache hfileblocks	Major	BlockCache, Performance
HBASE-15689	Changes to hbase-personality.sh to include/exclude flaky tests	Major	.
HBASE-15628	Implement an AsyncOutputStream which can work with any FileSystem implementation	Major	.
HBASE-15579	Procedure V2 - Remove synchronized around nonce in Procedure submit	Trivial	proc-v2
HBASE-15392	Single Cell Get reads two HFileBlocks	Major	BucketCache
HBASE-15671	Add per-table metrics on memstore, storefile and regionsize	Major	.
HBASE-15366	Add doc, trace-level logging, and test around hfileblock	Major	BlockCache
HBASE-15683	Min latency in latency histograms are emitted as Long.MAX_VALUE	Major	.
HBASE-15368	Add pluggable window support	Major	Compaction
HBASE-15663	Hook up JvmPauseMonitor to ThriftServer	Major	metrics, Thrift
HBASE-15662	Hook up JvmPauseMonitor to REST server	Major	metrics, REST
HBASE-15518	Add Per-Table metrics back	Major	.
HBASE-15640	L1 cache doesn't give fair warning that it is showing partial stats only when it hits limit	Major	BlockCache
HBASE-15386	PREFETCH_BLOCKS_ON_OPEN in HColumnDescriptor is ignored	Major	BucketCache
HBASE-15665	Support using different StoreFileComparators for different CompactionPolicies	Major	Compaction
HBASE-15527	Refactor Compactor related classes	Major	Compaction
HBASE-15407	Add SASL support for fan out OutputStream	Major	util, wal
HBASE-15380	Purge rollback support in Store etc.	Major	.
HBASE-15537	Make multi WAL work with WALs other than FSHLog	Major	.
HBASE-15400	Use DateTieredCompactor for Date Tiered Compaction	Major	Compaction
HBASE-15369	Handle NPE in region.jsp	Minor	UI
HBASE-15505	ReplicationPeerConfig should be builder-style	Major	.
HBASE-15293	Handle TableNotFound and IllegalArgument exceptions in table.jsp	Major	UI
HBASE-15538	Implement secure async protobuf wal writer	Major	wal
HBASE-15389	Write out multiple files when compaction	Major	Compaction
HBASE-15384	Avoid using '/tmp' directory in TestBulkLoad	Major	test
HBASE-15524	Fix NPE in client-side metrics	Critical	Client, metrics
HBASE-15495	Connection leak in FanOutOneBlockAsyncDFSOutputHelper	Major	.
HBASE-15416	TestHFileBackedByBucketCache is flakey since it went in	Critical	BucketCache
HBASE-15412	Add average region size metric	Major	.
HBASE-15488	Add ACL for setting split merge switch	Major	.
HBASE-15464	Flush / Compaction metrics revisited	Major	metrics
HBASE-15460	Fix infer issues in hbase-common	Major	.
HBASE-15479	No more garbage or beware of autoboxing	Major	Client
HBASE-15334	Add avro support for spark hbase connector	Major	.
HBASE-15390	Unnecessary MetaCache evictions cause elevated number of requests to meta	Blocker	Client
HBASE-15180	Reduce garbage created while reading Cells from Codec Decoder	Major	regionserver
HBASE-15435	Add WAL (in bytes) written metric	Major	.
HBASE-15113	Procedure v2 - Speedup eviction of sys operation results	Minor	proc-v2
HBASE-15422	Procedure v2 - Avoid double yield	Major	proc-v2
HBASE-15421	Convert TestStoreScanner to junit4 from junit3 and clean up close of scanners	Minor	test
HBASE-15354	Use same criteria for clearing meta cache for all operations	Major	Client
HBASE-15373	DEPRECATED_NAME_OF_NO_LIMIT_THROUGHPUT_CONTROLLER_CLASS value is wrong in CompactionThroughputControllerFactory	Minor	Compaction
HBASE-15375	Do not write to '/tmp' in TestRegionMover	Major	test
HBASE-15359	Simplifying Segment hierarchy	Major	.
HBASE-15371	Procedure V2 - Completed support parent-child procedure	Major	proc-v2
HBASE-15365	Do not write to '/tmp' in TestHBaseConfiguration	Major	test
HBASE-15346	add 1.3 RM to docs	Major	documentation
HBASE-15351	Fix description of hbase.bucketcache.size in hbase-default.xml	Major	documentation
HBASE-15205	Do not find the replication scope for every WAL#append()	Minor	regionserver
HBASE-15311	Prevent NPE in BlockCacheViewTmpl	Major	UI
HBASE-15144	Procedure v2 - Web UI displaying Store state	Minor	proc-v2, UI
HBASE-15264	Implement a fan out HDFS OutputStream	Major	util, wal
HBASE-15016	StoreServices facility in Region	Major	.
HBASE-15232	Exceptions returned over multi RPC don't automatically trigger region location reloads	Major	Client
HBASE-14949	Resolve name conflict when splitting if there are duplicated WAL entries	Major	wal
HBASE-15270	Use appropriate encoding for "filter" field in TaskMonitorTmpl.jamon	Major	UI
HBASE-15263	TestIPv6NIOServerSocketChannel.testServerSocketFromLocalhostResolution can hang indefinetly	Major	.
HBASE-15244	More doc around native lib setup and check and crc	Major	documentation, Performance
HBASE-15203	Reduce garbage created by path.toString() during Checksum verification	Minor	regionserver
HBASE-14919	Infrastructure refactoring for In-Memory Flush	Major	.
HBASE-15204	Try to estimate the cell count for adding into WALEdit	Major	regionserver
HBASE-15239	Remove unused LoadBalancer.immediateAssignment()	Trivial	Balancer
HBASE-15238	HFileReaderV2 prefetch overreaches; runs off the end of the data	Major	.
HBASE-15046	Perf test doing all mutation steps under row lock	Major	Performance
HBASE-15158	Change order in which we do write pipeline operations; do all under row locks!	Major	Performance
HBASE-15163	Add sampling code and metrics for get/scan/multi/mutate count separately	Major	.
HBASE-15157	Add *PerformanceTest for Append, CheckAnd*	Major	Performance, test
HBASE-15094	Selection of WAL files eligible for incremental backup is broken	Major	.
HBASE-15210	Undo aggressive load balancer logging at tens of lines per millisecond	Major	Balancer
HBASE-15202	Reduce garbage while setting response	Minor	regionserver
HBASE-15194	TestStochasticLoadBalancer.testRegionReplicationOnMidClusterSameHosts flaky on trunk	Major	flakey, test
HBASE-14841	Allow Dictionary to work with BytebufferedCells	Major	regionserver, Scanners
HBASE-15142	Procedure v2 - Basic WebUI listing the procedures	Minor	proc-v2, UI
HBASE-15171	Avoid counting duplicate kv and generating lots of small hfiles in PutSortReducer	Major	.
HBASE-15106	Procedure V2 - Procedure Queue pass Procedure for better debuggability	Major	proc-v2
HBASE-14221	Reduce the number of time row comparison is done in a Scan	Major	Scanners
HBASE-15118	Fix findbugs complaint in hbase-server	Major	build
HBASE-15115	Fix findbugs complaints in hbase-client	Major	build
HBASE-14962	TestSplitWalDataLoss fails on all branches	Blocker	test
HBASE-15114	NPE when IPC server ByteBuffer reservoir is turned off	Major	.
HBASE-15105	Procedure V2 - Procedure Queue with Namespaces	Major	proc-v2
HBASE-14837	Procedure V2 - Procedure Queue Improvement	Minor	proc-v2
HBASE-15095	isReturnResult=false on fast path in branch-1.1 and branch-1.0 is not respected	Major	Performance
HBASE-15087	Fix hbase-common findbugs complaints	Major	build
HBASE-15077	Support OffheapKV write in compaction with out copying data on heap	Major	regionserver, Scanners
HBASE-12593	Tags to work with ByteBuffer	Major	regionserver, Scanners
HBASE-14488	Procedure V2 - shell command to abort a procedure	Major	proc-v2
HBASE-14487	Procedure V2 - shell command to list all procedures	Major	proc-v2, shell
HBASE-14108	Procedure V2 - Administrative Task: provide an API to abort a procedure	Major	proc-v2
HBASE-14432	Procedure V2 - enforce ACL on procedure admin tasks	Major	proc-v2
HBASE-14107	Procedure V2 - Administrative Task: Provide an API to List all procedures	Major	proc-v2
HBASE-15023	Reenable TestShell and TestStochasticLoadBalancer	Major	test
HBASE-14908	TestRowCounter flakey especially on branch-1	Major	flakey, test
HBASE-14863	Add missing test/resources/log4j files in hbase modules	Trivial	test
HBASE-14947	Procedure V2 - WALProcedureStore improvements	Blocker	proc-v2
HBASE-14895	Seek only to the newly flushed file on scanner reset on flush	Major	.
HBASE-14655	Narrow the scope of doAs() calls to region observer notifications for compaction	Blocker	Coprocessors, security
HBASE-14631	Region merge request should be audited with request user through proper scope of doAs() calls to region observer notifications	Blocker	Coprocessors, security
HBASE-14605	Split fails due to 'No valid credentials' error when SecureBulkLoadEndpoint#start tries to access hdfs	Blocker	Coprocessors, security
HBASE-14772	Improve zombie detector; be more discerning	Major	test
HBASE-14884	TestSplitTransactionOnCluster.testSSHCleanupDaugtherRegionsOfAbortedSplit is flakey	Major	flakey, test
HBASE-14909	NPE testing for RIT	Major	test
HBASE-14575	Relax region read lock for compactions	Major	Compaction, regionserver
HBASE-14819	hbase-it tests failing with OOME; permgen	Major	test
HBASE-14832	Ensure write paths work with ByteBufferedCells in case of compaction	Minor	regionserver, Scanners
HBASE-14798	NPE reporting server load causes regionserver abort; causes TestAcidGuarantee to fail	Major	test
HBASE-14794	Cleanup TestAtomicOperation, TestImportExport, and TestMetaWithReplicas	Major	flakey, test
HBASE-14785	Hamburger menu for mobile site	Major	website
HBASE-14786	TestProcedureAdmin hangs	Major	hangingTests, test
HBASE-14589	Looking for the surefire-killer; builds being killed...ExecutionException: java.lang.RuntimeException: The forked VM terminated without properly saying goodbye. VM crash or System.exit called?	Major	test
HBASE-14725	Vet categorization of tests so they for sure go into the right small/medium/large buckets	Major	test
HBASE-14638	Move Jython info from the Wiki to the Ref Guide	Major	documentation
HBASE-14639	Move Scala info from Wiki to Ref Guide	Major	documentation
HBASE-13478	Document the change of default master ports being used .	Minor	documentation
HBASE-14641	Move JDO example from Wiki to Ref Guide	Major	documentation
HBASE-14640	Move Cascading info from Wiki to Ref Guide	Major	documentation
HBASE-14720	Make TestHCM and TestMetaWithReplicas large tests rather than mediums	Major	hangingTests, test
HBASE-14710	Add category-based timeouts to MR tests	Major	hangingTests, mapreduce, test
HBASE-14709	Parent change breaks graceful_stop.sh on a cluster	Major	Operability
HBASE-14702	TestZKProcedureControllers.testZKCoordinatorControllerWithSingleMemberCohort is a flakey	Major	flakey, test
HBASE-14698	Set category timeouts on TestScanner and TestNamespaceAuditor	Major	test
HBASE-14648	Reenable TestWALProcedureStoreOnHDFS#testWalRollOnLowReplication	Critical	test
HBASE-14685	Procedure Id is not set for MasterRpcServices#modifyTable	Major	master, proc-v2
HBASE-14535	Integration test for rpc connection concurrency / deadlock testing	Major	IPC/RPC
HBASE-14657	Remove unneeded API from EncodedSeeker	Major	io
HBASE-13538	Procedure v2 - client add/delete/modify column family sync (incompatible with branch-1.x)	Major	proc-v2
HBASE-14662	Fix NPE in HFileOutputFormat2	Major	.
HBASE-14636	Clear HFileScannerImpl#prevBlocks in between Compaction flow	Blocker	regionserver, Scanners
HBASE-14595	For Wiki contents that are also in the Ref Guide, replace content with a URL	Major	documentation
HBASE-14646	Move TestCellACLs from medium to large category	Minor	test
HBASE-14647	Disable TestWALProcedureStoreOnHDFS#testWalRollOnLowReplication	Major	test
HBASE-14637	Loosen TestChoreService assert AND have TestDataBlockEncoders do less work (and add timeouts)	Major	test
HBASE-14627	Move Stargate docs to Ref Guide	Major	documentation
HBASE-14607	Convert SupportingProjects wiki page to a site page	Major	documentation
HBASE-14570	Split TestHBaseFsck in order to help with hanging tests	Major	test
HBASE-14602	Convert HBasePoweredBy Wiki page to a hbase.apache.org page	Major	documentation
HBASE-14596	TestCellACLs failing... on1.2 builds	Major	test
HBASE-14600	Make #testWalRollOnLowReplication looser still	Major	test
HBASE-13819	Make RPC layer CellBlock buffer a DirectByteBuffer	Major	Scanners
HBASE-14558	Document ChaosMonkey enhancements from HBASE-14261	Major	documentation
HBASE-14590	Shorten ByteBufferedCell#getXXXPositionInByteBuffer method name	Major	regionserver, Scanners
HBASE-14585	Clean up TestSnapshotCloneIndependence	Major	flakey, test
HBASE-14567	Tuneup hanging test TestMobCompactor and TestMobSweeper	Major	test
HBASE-14572	TestImportExport#testImport94Table can't find its src data file	Major	test
HBASE-14571	Purge TestProcessBasedCluster; it does nothing and then fails	Major	test
HBASE-14519	Purge TestFavoredNodeAssignmentHelper, a test for an abandoned feature that can hang	Major	test
HBASE-14563	Disable zombie TestHFileOutputFormat2	Major	test
HBASE-14561	Disable zombie TestReplicationShell	Major	test
HBASE-14559	branch-1 test tweeks; disable assert explicit region lands post-restart and up a few handlers	Major	test
HBASE-14480	Small optimization in SingleByteBuff	Major	regionserver, Scanners
HBASE-14539	Slight improvement of StoreScanner.optimize	Minor	Performance, Scanners
HBASE-14543	Have findHangingTests.py dump more info	Major	tooling
HBASE-14513	TestBucketCache runs obnoxious 1k threads in a unit test	Major	test
HBASE-14495	TestHRegion#testFlushCacheWhileScanning goes zombie	Major	test
HBASE-14507	Disable TestDistributedLogSplitting#testWorkerAbort Its flakey with tenuous chance of success	Major	test
HBASE-14398	Create the fake keys required in the scan path to avoid copy to byte[]	Major	.
HBASE-14430	TestHttpServerLifecycle#testStartedServerIsAlive times out	Major	test
HBASE-14212	Add IT test for procedure-v2-based namespace DDL	Major	proc-v2
HBASE-14051	Undo workarounds in IntegrationTestDDLMasterFailover for client double submit	Major	master
HBASE-12748	RegionCoprocessorHost.execOperation creates too many iterator objects	Major	.
HBASE-14378	Get TestAccessController* passing again on branch-1	Major	.
HBASE-14484	Follow-on from HBASE-14421, just disable TestFastFail* until someone digs in and fixes it	Major	test
HBASE-14464	Removed unused fs code	Minor	regionserver
HBASE-14472	TestHCM and TestRegionServerNoMaster fixes	Minor	test
HBASE-14147	REST Support for Namespaces	Minor	REST
HBASE-14447	Spark tests failing: bind exception when putting up info server	Minor	test
HBASE-14278	Fix NPE that is showing up since HBASE-14274 went in	Major	test
HBASE-14433	Set down the client executor core thread count from 256 in tests	Major	test
HBASE-14401	Stamp failed appends with sequenceid too.... Cleans up latches	Major	test, wal
HBASE-14435	thrift tests don't have test-specific hbase-site.xml so 'BindException: Address already in use' because info port is not turned off	Major	test
HBASE-14428	Upgrade our surefire-plugin from 2.18 to 2.18.1	Major	test
HBASE-14421	TestFastFail* are flakey	Major	test
HBASE-14423	TestStochasticBalancerJmxMetrics.testJmxMetrics_PerTableMode:183 NullPointer	Major	test
HBASE-14395	Short circuit last byte check in CellUtil#matchingXXX methods for ByteBufferedCells	Major	regionserver, Scanners
HBASE-14368	New TestWALLockup broken by addendum added to parent issue	Major	test
HBASE-14322	Master still not using more than it's priority threads	Major	IPC/RPC, master
HBASE-13212	Procedure V2 - master Create/Modify/Delete namespace	Major	master
HBASE-14239	Branch-1.2 AM can get stuck when meta moves	Major	Region Assignment
HBASE-14274	Deadlock in region metrics on shutdown: MetricsRegionSourceImpl vs MetricsRegionAggregateSourceImpl	Major	test
HBASE-14186	Read mvcc vlong optimization	Major	Performance, Scanners
HBASE-14144	Bloomfilter path to work with Byte buffered cells	Major	regionserver, Scanners
HBASE-14087	ensure correct ASF policy compliant headers on source/docs	Blocker	build
HBASE-14202	Reduce garbage we create	Major	regionserver, Scanners
HBASE-14105	Add shell tests for Snapshot	Major	test
HBASE-14188	Read path optimizations after HBASE-11425 profiling	Major	Scanners
HBASE-14176	Add missing headers to META-INF files	Trivial	build
HBASE-14086	remove unused bundled dependencies	Blocker	documentation
HBASE-14063	Use BufferBackedCell in read path after HBASE-12213 and HBASE-12295	Major	regionserver, Scanners
HBASE-12295	Prevent block eviction under us if reads are in progress from the BBs	Major	regionserver, Scanners
HBASE-14116	Change ByteBuff.getXXXStrictlyForward to relative position based reads	Major	.
HBASE-12374	Change DBEs to work with new BB based cell	Major	regionserver, Scanners
HBASE-14120	ByteBufferUtils#compareTo small optimization	Major	regionserver, Scanners
HBASE-14104	Add vectorportal.com to NOTICES.txt as src of our logo	Major	documentation
HBASE-14102	Add thank you to our thanks page for vectorportal.com	Major	.
HBASE-12015	Not cleaning Mob data when Mob CF is removed from table	Major	.
HBASE-13993	WALProcedureStore fencing is not effective if new WAL rolls	Major	master
HBASE-13387	Add ByteBufferedCell an extension to Cell	Major	regionserver, Scanners
HBASE-13832	Procedure V2: master fail to start due to WALProcedureStore sync failures when HDFS data nodes count is low	Blocker	master, proc-v2
HBASE-13415	Procedure V2 - Use nonces for double submits from client	Blocker	master
HBASE-14017	Procedure v2 - MasterProcedureQueue fix concurrency issue on table queue deletion	Blocker	proc-v2
HBASE-14020	Unsafe based optimized write in ByteBufferOutputStream	Major	Scanners
HBASE-13998	Remove CellComparator#compareRows(byte[] left, int loffset, int llength, byte[] right, int roffset, int rlength)	Major	.
HBASE-13977	Convert getKey and related APIs to Cell	Major	.
HBASE-14013	Retry when RegionServerNotYetRunningException rather than go ahead with assign so for sure we don't skip WAL replay	Major	Region Assignment
HBASE-13975	add 1.2 RM to docs	Major	documentation
HBASE-13911	add 1.2 to prereq tables in ref guide	Blocker	documentation
HBASE-13990	clean up remaining errors for maven site goal	Major	documentation
HBASE-14003	work around jdk8 spec bug in WALPerfEval	Critical	test
HBASE-13939	Make HFileReaderImpl.getFirstKeyInBlock() to return a Cell	Minor	.
HBASE-13614	Avoid temp KeyOnlyKeyValue temp objects creations in read hot path	Critical	.
HBASE-12345	Unsafe based ByteBuffer Comparator	Major	regionserver, Scanners
HBASE-13922	Do not reset mvcc in compactions for mob-enabled column	Major	mob
HBASE-13968	Remove deprecated methods from BufferedMutator class	Major	API
HBASE-13973	Update documentation for 10070 Phase 2 changes	Major	.
HBASE-13967	add jdk profiles for jdk.tools dependency	Major	.
HBASE-13950	Add a NoopProcedureStore for testing	Trivial	proc-v2
HBASE-13920	Exclude Java files generated from protobuf from javadoc	Minor	.
HBASE-13932	Add mob integrity check in HFilePrettyPrinter	Major	mob
HBASE-13898	correct additional javadoc failures under java 8	Minor	documentation
HBASE-13728	Remove use of Hadoop's GenericOptionsParser	Blocker	.
HBASE-13448	New Cell implementation with cached component offsets/lengths	Blocker	Scanners
HBASE-13926	Close the scanner only after Call#setResponse	Major	regionserver, Scanners
HBASE-13916	Create MultiByteBuffer an aggregation of ByteBuffers	Major	regionserver, Scanners
HBASE-13470	High level Integration test for master DDL operations	Major	master
HBASE-13886	Return empty value when the mob file is corrupt instead of throwing exceptions	Major	mob
HBASE-13910	add branch-1.2 to precommit branches	Major	build
HBASE-13899	Jacoco instrumentation fails under jdk8	Major	build, test
HBASE-13569	correct errors reported with mvn site	Minor	documentation
HBASE-13855	Race in multi threaded PartitionedMobCompactor causes NPE	Critical	mob
HBASE-13871	Change RegionScannerImpl to deal with Cell instead of byte[], int, int	Major	regionserver, Scanners
HBASE-13836	Do not reset the mvcc for bulk loaded mob reference cells in reading	Major	mob
HBASE-13451	Make the HFileBlockIndex blockKeys to Cells so that it could be easy to use in the CellComparators	Major	.
HBASE-13856	Wrong mob metrics names in TestRegionServerMetrics	Major	mob
HBASE-13806	Check the mob files when there are mob-enabled columns in HFileCorruptionChecker	Major	mob
HBASE-13827	Delayed scanner close in KeyValueHeap and StoreScanner	Major	regionserver, Scanners
HBASE-13817	ByteBufferOuputStream - add writeInt support	Major	Scanners
HBASE-13804	Revert the changes in pom.xml	Major	mob
HBASE-13803	Disable the MobCompactionChore when the interval is not larger than 0	Major	mob
HBASE-13805	Use LimitInputStream in hbase-common instead of ProtobufUtil.LimitedInputStream	Major	mob
HBASE-13759	Improve procedure yielding	Trivial	proc-v2
HBASE-13790	Remove the DeleteTableHandler	Major	mob
HBASE-13616	Move ServerShutdownHandler to Pv2	Major	proc-v2
HBASE-13476	Procedure V2 - Add Replay Order logic for child procedures	Major	proc-v2
HBASE-13763	Handle the rename, annotation and typo stuff in MOB	Major	mob
HBASE-13754	Allow non KeyValue Cell types also to oswrite	Major	Scanners
HBASE-13393	Optimize memstore flushing to avoid writing tag information to hfiles when no tags are present.	Major	HFile, Performance
HBASE-13658	Improve the test run time for TestAccessController class	Major	test
HBASE-13762	Use the same HFileContext with store files in mob files	Major	mob
HBASE-13720	Mob files are not encrypting in mob compaction and Sweeper	Major	regionserver, Scanners
HBASE-13739	Remove KeyValueUtil.ensureKeyValue(cell) from MOB code.	Major	mob
HBASE-13641	Deperecate Filter#filterRowKey(byte[] buffer, int offset, int length) in favor of filterRowKey(Cell firstRowCell)	Major	Filters, regionserver, Scanners
HBASE-13736	Add delay for the first execution of ExpiredMobFileCleanerChore and MobFileCompactorChore	Major	mob
HBASE-13642	Deprecate RegionObserver#postScannerFilterRow CP hook with byte[],int,int args in favor of taking Cell arg	Major	Coprocessors, regionserver, Scanners
HBASE-13679	Change ColumnTracker and SQM to deal with Cell instead of byte[], int, int	Major	regionserver, Scanners
HBASE-13531	Flakey failures of TestAcidGuarantees#testMobScanAtomicity	Major	regionserver, Scanners
HBASE-13510	Purge ByteBloomFilter	Major	.
HBASE-13398	Document HBase Quota	Major	documentation
HBASE-13201	Remove HTablePool from thrift-server	Major	.
HBASE-13571	Procedure v2 - client modify table sync (incompatible with branch-1.x)	Minor	proc-v2
HBASE-13593	Quota support for namespace should take snapshot restore and clone into account	Major	snapshots
HBASE-13620	Bring back the removed VisibilityClient methods and mark them as deprecated.	Minor	.
HBASE-13464	Remove deprecations for 2.0.0 - Part 1	Major	.
HBASE-13501	Deprecate/Remove getComparator() in HRegionInfo.	Major	.
HBASE-13497	Remove MVCC stamps from HFile when that is safe	Major	Scanners
HBASE-13184	Document turning off memstore for region replicas	Critical	documentation, Replication
HBASE-13537	Procedure V2 - Change the admin interface for async operations to return Future (incompatible with branch-1.x)	Major	proc-v2
HBASE-13572	Procedure v2 - client truncate table sync (incompatible with branch-1.x)	Minor	proc-v2
HBASE-13551	Procedure V2 - Procedure classes should not be InterfaceAudience.Public	Blocker	master
HBASE-13563	Add missing table owner to AC tests.	Minor	.
HBASE-13466	Document deprecations in 1.x - Part 1	Major	.
HBASE-13536	Cleanup the handlers that are no longer being used.	Major	proc-v2
HBASE-13450	Purge RawBytescomparator from the writers and readers for HBASE-10800	Major	.
HBASE-13529	Procedure v2 - WAL Improvements	Blocker	proc-v2
HBASE-13496	Make Bytes$LexicographicalComparerHolder$UnsafeComparer::compareTo inlineable	Major	Scanners
HBASE-13502	Deprecate/remove getRowComparator() in TableName	Major	.
HBASE-13515	Handle FileNotFoundException in region replica replay for flush/compaction events	Major	.
HBASE-13514	Fix test failures in TestScannerHeartbeatMessages caused by incorrect setting of hbase.rpc.timeout	Minor	.
HBASE-13498	Add more docs and a basic check for storage policy handling	Minor	wal
HBASE-13481	Master should respect master (old) DNS/bind related configurations	Major	.
HBASE-13307	Making methods under ScannerV2#next inlineable, faster	Major	Scanners
HBASE-13455	Procedure V2 - master truncate table	Minor	master
HBASE-13290	Procedure v2 - client enable/disable table sync	Major	Client
HBASE-13211	Procedure V2 - master Enable/Disable table	Major	master
HBASE-13210	Procedure V2 - master Modify table	Major	master
HBASE-13209	Procedure V2 - master Add/Modify/Delete Column Family	Major	master
HBASE-13204	Procedure v2 - client create/delete table sync	Minor	master
HBASE-13203	Procedure v2 - master create/delete table	Minor	master
HBASE-13202	Procedure v2 - core framework	Major	master, proc-v2
HBASE-13447	Bypass logic in TimeRange.compare	Minor	Scanners
HBASE-13313	Skip the disabled table in mob compaction chore and MasterRpcServices	Major	regionserver, Scanners
HBASE-13429	Remove deprecated seek/reseek methods from HFileScanner	Major	regionserver, Scanners
HBASE-13421	Reduce the number of object creations introduced by HBASE-11544 in scan RPC hot code paths	Major	.
HBASE-13302	fix new javadoc warns introduced by mob.	Major	regionserver, Scanners
HBASE-13277	add mob_threshold option to load test tool	Major	regionserver, Scanners
HBASE-13252	Get rid of managed connections and connection caching	Major	API
HBASE-13335	Update ClientSmallScanner and ClientSmallReversedScanner	Major	Client
HBASE-13213	Split out locality metrics among primary and secondary region	Major	.
HBASE-13303	Fix size calculation of results on the region server	Major	Client
HBASE-13332	Fix the usage of doAs/runAs in Visibility Controller tests.	Major	.
HBASE-13327	Use Admin in ConnectionCache	Major	.
HBASE-13258	Promote TestHRegion to LargeTests	Major	test
HBASE-13006	Document visibility label support for groups	Minor	.
HBASE-13230	[mob] reads hang when trying to read rows with large mobs (>10MB)	Major	mob
HBASE-13244	Test delegation token generation with kerberos enabled	Major	security, test
HBASE-13226	Document enable_table_replication and disable_table_replication shell commands	Minor	documentation
HBASE-13169	ModifyTable increasing the region replica count should also auto-setup RRRE	Major	.
HBASE-13121	Async wal replication for region replicas and dist log replay does not work together	Major	.
HBASE-13095	Document how to retrieve replication stats from HBase Shell	Major	documentation, Replication
HBASE-13164	Update TestUsersOperationsWithSecureHadoop to use MiniKdc	Major	security, test
HBASE-12562	Handling memory pressure for secondary region replicas	Major	.
HBASE-13151	IllegalArgumentException in compaction when table has a namespace	Major	regionserver, Scanners
HBASE-13107	Refactor MOB Snapshot logic to reduce code duplication.	Major	mob, snapshots
HBASE-13157	Add mob compaction actions and monkeys to Chaos Monkey	Major	integration tests, mob
HBASE-12332	[mob] improve how we resolve mobfiles in reads	Major	mob
HBASE-13154	Add support for mob in TestAcidGuarantees and IntegrationTestAcidGuarantees	Major	integration tests, mob
HBASE-13012	Add shell commands to trigger the mob file compactor	Major	regionserver, Scanners
HBASE-11580	Failover handling for secondary region replicas	Major	.
HBASE-13152	NPE in ExpiredMobFileCleanerChore	Major	regionserver, Scanners
HBASE-11571	Bulk load handling from secondary region replicas	Major	.
HBASE-12670	Add unit tests that exercise the added hfilelink link mob paths	Major	regionserver, Scanners
HBASE-13130	Add timeouts on TestMasterObserver, a frequent zombie show	Major	test
HBASE-13117	improve mob sweeper javadoc	Major	mob
HBASE-13067	Fix caching of stubs to allow IP address changes of restarted remote servers	Major	.
HBASE-12561	Replicas of regions can be cached from different instances of the table in MetaCache	Major	.
HBASE-12714	RegionReplicaReplicationEndpoint should not set the RPC Codec	Major	.
HBASE-11842	Integration test for async wal replication to secondary regions	Major	.
HBASE-13013	Add read lock to ExpiredMobFileCleanerChore	Major	master
HBASE-12425	Document the phases of the split transaction	Major	documentation
HBASE-11569	Flush / Compaction handling from secondary region replicas	Major	.
HBASE-11910	Document Premptive Call Me Maybe HBase findings in the online manual	Major	.
HBASE-11567	Write bulk load COMMIT events to WAL	Major	.
HBASE-11568	Async WAL replication for region replicas	Major	.
HBASE-11861	Native MOB Compaction mechanisms.	Major	regionserver, Scanners
HBASE-10942	support parallel request cancellation for multi-get	Major	.
HBASE-12936	Quota support for namespace should take region merge into account	Major	.
HBASE-11574	hbase:meta's regions can be replicated	Major	.
HBASE-11908	Region replicas should be added to the meta table at the time of table creation	Major	.
HBASE-7847	Use zookeeper multi to clear znodes	Major	.
HBASE-12669	Have compaction scanner save info about delete markers	Major	regionserver, Scanners
HBASE-8410	Basic quota support for namespaces	Major	.
HBASE-12820	Use table lock instead of MobZookeeper	Major	regionserver, Scanners
HBASE-12848	Utilize Flash storage for WAL	Major	.
HBASE-12708	Document newly introduced params for using Thrift-over-HTTPS.	Minor	documentation, Thrift
HBASE-11533	AsciiDoctor POC	Minor	build, documentation
HBASE-12695	JDK 1.8 compilation broken	Critical	build
HBASE-12331	Shorten the mob snapshot unit tests	Major	mob
HBASE-12698	Add mob cell count to the metadata of each mob file	Major	regionserver
HBASE-12758	treat mob region as any other region when generating rs manifest.	Major	mob, snapshots
HBASE-12012	Improve cancellation for the scan RPCs	Major	.
HBASE-12738	Chunk Ref Guide into file-per-chapter	Major	documentation
HBASE-12528	Document the newly introduced params for providing principal and keytabs.	Minor	documentation
HBASE-12691	sweep job needs to exit non-zero if job fails for any reason.	Major	mob
HBASE-12648	Document per cell TTLs	Minor	documentation
HBASE-12646	SnapshotInfo tool does not find mob data in snapshots	Major	mob, snapshots
HBASE-11903	Directly invoking split & merge of replica regions should be disallowed	Major	.
HBASE-12523	Update checkstyle plugin rules to match our use	Minor	build
HBASE-12591	Ignore the count of mob compaction metrics when there is issue	Minor	regionserver
HBASE-12543	Incorrect log info in the store compaction of mob	Minor	regionserver
HBASE-12487	Explicitly flush the file name in sweep job	Major	regionserver, Scanners
HBASE-12486	Move the mob table name tag to the 2nd one	Major	regionserver, Scanners
HBASE-12489	Incorrect 'mobFileCacheMissCount' calculated in the mob metrics	Major	regionserver, Scanners
HBASE-12382	Restore incremental compilation	Major	.
HBASE-12343	Document recommended configuration for 0.98 from HBASE-11964	Major	.
HBASE-4625	Convert @deprecated HBaseTestCase tests JUnit4 style tests	Minor	.
HBASE-12392	Incorrect implementation of CompactionRequest.isRetainDeleteMarkers	Critical	regionserver, Scanners
HBASE-12391	Correct a typo in the mob metrics	Minor	regionserver, Scanners
HBASE-11683	Metrics for MOB	Major	regionserver, Scanners
HBASE-11912	Catch some bad practices at compile time with error-prone	Major	.
HBASE-11645	Snapshot for MOB	Major	snapshots
HBASE-12093	Support the mob attributes in hbase shell when create/alter table	Major	shell
HBASE-12085	mob status should print human readable numbers.	Major	mob, UI
HBASE-12080	Shorten the run time of integration test by default when using mvn failsafe:integration-test	Major	test
HBASE-12066	Avoid major compaction in TestMobSweeper	Major	Compaction, mob
HBASE-11644	External MOB compaction tools	Major	Compaction, master
HBASE-11472	Remove ZKTableStateClientSideReader class	Major	Client, Consensus, Zookeeper
HBASE-11598	Add simple rpc throttling	Minor	.
HBASE-8139	Allow job names to be overridden	Major	mapreduce, Usability
HBASE-11646	Handle the MOB in compaction	Major	Compaction
HBASE-11986	Document MOB in Ref Guide	Major	documentation
HBASE-12000	isMob and mobThreshold do not follow column descriptor property naming conventions	Major	regionserver, Scanners
HBASE-11975	Remove the explicit list of maven repositories in pom.xml	Major	.
HBASE-7767	Get rid of ZKTable, and table enable/disable state in ZK	Major	Zookeeper
HBASE-11647	MOB integration testing	Major	Performance, test
HBASE-11911	Break up tests into more fine grained categories	Major	.
HBASE-11901	Improve the value size of the reference cell in mob column	Major	.
HBASE-11786	Document web UI for tracking time spent in coprocessors	Minor	Coprocessors, documentation
HBASE-11643	Read and write MOB in HBase	Major	regionserver, Scanners
HBASE-11779	Document the new requirement to set JAVA_HOME before starting HBase	Major	documentation
HBASE-11607	Document HBase metrics	Major	documentation, metrics
HBASE-10674	HBCK should be updated to do replica related checks	Major	.
HBASE-4624	Remove and convert @deprecated RemoteExceptionHandler.decodeRemoteException calls	Major	.
HBASE-11261	Handle splitting/merging of regions that have region_replication greater than one	Major	.

OTHER:

JIRA	Summary	Priority	Component
HBASE-8770	deletes and puts with the same ts should be resolved according to mvcc/seqNum	Blocker	.
HBASE-20067	Clean up findbugs warnings	Critical	.
HBASE-10403	Simplify offheap cache configuration	Minor	io
HBASE-19976	Dead lock if the worker threads in procedure executor are exhausted	Critical	.
HBASE-19948	Since HBASE-19873, HBaseClassTestRule, Small/Medium/Large has different semantic	Major	.
HBASE-19296	Fix findbugs and error-prone warnings (branch-2)	Major	.
HBASE-19425	Align the methods in Put/Delete/Increment/Append	Major	.
HBASE-19627	Stabilize the method signature for Cell and its impl	Critical	.
HBASE-18429	ITs attempt to modify immutable table/column descriptors	Critical	integration tests
HBASE-18110	[AMv2] Reenable tests temporarily disabled	Blocker	Region Assignment
HBASE-18978	Align the methods in Table and AsyncTable	Critical	asyncclient, Client
HBASE-18805	Unify Admin and AsyncAdmin	Major	.
HBASE-18703	Inconsistent behavior for preBatchMutate in doMiniBatchMutate and processRowsWithLocks	Critical	Coprocessors
HBASE-18926	Cleanup Optional<T> from method params	Major	.
HBASE-17143	Scan improvement	Blocker	Client, scan
HBASE-18751	Revisit the TimeRange and TimeRangeTracker	Major	.
HBASE-7320	Remove KeyValue.getBuffer()	Blocker	.
HBASE-10462	Recategorize some of the client facing Public / Private interfaces	Blocker	Client
HBASE-18696	Fix the problems when introducing the new hbase-mapreduce module	Blocker	mapreduce
HBASE-18501	Use TableDescriptor and ColumnFamilyDescriptor as far as possible	Critical	.
HBASE-18266	Eliminate the warnings from the spotbugs	Major	.
HBASE-17359	Implement async admin	Major	Client
HBASE-15086	Fix findbugs complaint so yetus reports more green	Major	build
HBASE-6581	Build with hadoop.profile=3.0	Major	.
HBASE-16617	Procedure V2 - Improvements	Minor	master, proc-v2
HBASE-16833	Implement asynchronous hbase client based on HBASE-15921	Major	Client
HBASE-18037	Do not expose implementation classes to CP	Blocker	Coprocessors
HBASE-15179	Cell/DBB end-to-end on the write-path	Major	regionserver
HBASE-16145	MultiRowRangeFilter constructor shouldn't throw IOException	Minor	.
HBASE-16567	Upgrade to protobuf-3.1.x	Critical	Protobufs
HBASE-11871	Avoid usage of KeyValueUtil#ensureKeyValue	Major	regionserver
HBASE-16432	Revisit the asynchronous ipc implementation	Major	rpc
HBASE-14460	[Perf Regression] Merge of MVCC and SequenceId (HBASE-8763) slowed Increments, CheckAndPuts, batch operations	Critical	Performance
HBASE-11425	Cell/DBB end-to-end on the read-path	Major	regionserver, Scanners
HBASE-14457	Umbrella: Improve Multiple WAL for production usage	Major	.
HBASE-14420	Zombie Stomping Session	Critical	test
HBASE-14869	Better request latency and size histograms	Major	.
HBASE-11339	HBase MOB	Major	regionserver, Scanners
HBASE-13747	Promote Java 8 to "yes" in support matrix	Critical	java
HBASE-7781	Update security unit tests to use a KDC if available	Blocker	security, test
HBASE-12859	New master API to track major compaction completion	Major	.
HBASE-18792	hbase-2 needs to defend against hbck operations	Blocker	hbck
HBASE-19963	TestFSHDFSUtils assumes wrong default port for Hadoop 3.0.1+	Major	test
HBASE-20386	[DOC] Align WALPlayer help text and refguide	Minor	documentation
HBASE-20365	start branch-2.0 specific website section	Critical	documentation, website
HBASE-14175	Adopt releasedocmaker for better generated release notes	Critical	.
HBASE-14348	Update download mirror link	Major	documentation, website
HBASE-20299	Update MOB in hbase refguide	Minor	mob
HBASE-20132	Change the "KV" to "Cell" for web UI	Minor	.
HBASE-20199	Add test to prevent further permission regression around table flush and snapshot	Critical	test
HBASE-20223	Use hbase-thirdparty 2.1.0	Blocker	dependencies
HBASE-19158	Ref guide needs upgrade update	Blocker	documentation
HBASE-20212	Make all Public classes have InterfaceAudience category	Critical	Usability
HBASE-20246	Remove the spark module	Blocker	.
HBASE-19552	update hbase to use new thirdparty libs	Major	dependencies, thirdparty
HBASE-20171	Remove o.a.h.h.ProcedureState	Minor	.
HBASE-15151	Rely on nightly tests for findbugs compliance on existing branch	Critical	build, test
HBASE-20075	remove logic for branch-1.1 nightly testing	Minor	test
HBASE-20072	remove 1.1 release line from the prerequisite tables	Major	community, documentation
HBASE-18882	[TEST] Run MR branch-1 jobs against hbase2 cluster	Critical	mapreduce, test
HBASE-20093	Replace ServerLoad by ServerMetrics for ServerManager	Major	.
HBASE-20097	Merge TableDescriptors#getAll and TableDescriptors#getAllDescriptors into one	Minor	.
HBASE-20084	Refactor the RSRpcServices#doBatchOp	Minor	regionserver
HBASE-20092	Fix TestRegionMetrics#testRegionMetrics	Minor	test
HBASE-20088	Update copyright notices to year 2018	Minor	.
HBASE-20089	make_rc.sh should name SHA-512 checksum files with the extension .sha512	Minor	.
HBASE-18596	[TEST] A hbase1 cluster should be able to replicate to a hbase2 cluster; verify	Blocker	.
HBASE-19947	MR jobs using ITU use wrong filesystem	Critical	integration tests
HBASE-19946	TestPerColumnFamilyFlush and TestWalAndCompactingMemStoreFlush fail against h3	Major	test
HBASE-19922	ProtobufUtils::PRIMITIVES is unused	Major	Protobufs
HBASE-19720	Rename WALKey#getTabnename to WALKey#getTableName	Major	.
HBASE-15042	refactor so that site materials are in the Standard Maven Place	Minor	build, website
HBASE-19596	RegionMetrics/ServerMetrics/ClusterMetrics should apply to all public classes	Critical	Client
HBASE-19620	Add UT to confirm the race in MasterRpcServices.getProcedureResult	Minor	proc-v2, test
HBASE-19652	Turn down CleanerChore logging; too chatty	Major	.
HBASE-19644	add the checkstyle rule to reject the illegal imports	Major	.
HBASE-19637	Add .checkstyle to gitignore	Major	build
HBASE-19550	Wrap the cell passed via Mutation#add(Cell) to be of ExtendedCell	Major	.
HBASE-18970	The version of jruby we use now can't get interactive input from prompt	Critical	shell
HBASE-19548	Backport the missed doc fix from master to branch-2	Major	.
HBASE-19526	Update hadoop version to 3.0 GA	Major	build, dependencies
HBASE-19477	Move and align documentation in hbase-annotations	Trivial	.
HBASE-19267	Eclipse project import issues on 2.0	Major	build
HBASE-19512	Move EventType and ExecutorType from hbase-client to hbase-server	Major	regionserver
HBASE-19485	Minor improvement to TestCompactedHFilesDischarger	Trivial	.
HBASE-18988	Add release managers to reference guide	Trivial	documentation
HBASE-19410	Move zookeeper related UTs to hbase-zookeeper and mark them as ZKTests	Major	test, Zookeeper
HBASE-19323	Make netty engine default in hbase2	Major	rpc
HBASE-19416	Document dynamic configurations currently support	Minor	documentation
HBASE-19298	CellScanner and CellScannable should be declared as IA.Public	Major	.
HBASE-19408	Remove WALActionsListener.Base	Trivial	.
HBASE-19407	[branch-2] Remove backup/restore	Blocker	.
HBASE-19328	Remove asked if splittable log messages	Minor	proc-v2
HBASE-19200	make hbase-client only depend on ZKAsyncRegistry and ZNodePaths	Major	Client, Zookeeper
HBASE-19123	Purge 'complete' support from Coprocesor Observers	Major	Coprocessors
HBASE-19241	Improve javadoc for AsyncAdmin and cleanup warnings for the implementation classes	Major	documentation
HBASE-14350	Procedure V2 Phase 2: Assignment Manager	Blocker	master, proc-v2
HBASE-19224	LICENSE failure for Hadoop 3.1 on dnsjava	Major	build
HBASE-18817	Pull hbase-spark module out of branch-2	Blocker	spark
HBASE-19217	Update supplemental-models.xml for jetty-sslengine	Major	.
HBASE-19179	Remove hbase-prefix-tree	Critical	.
HBASE-19176	Remove hbase-native-client from branch-2	Major	.
HBASE-19097	update testing to use Apache Yetus Test Patch version 0.6.0	Major	build
HBASE-19049	Update kerby to 1.0.1 GA release	Major	dependencies
HBASE-16338	update jackson to 2.y	Major	dependencies
HBASE-19007	Align Services Interfaces in Master and RegionServer	Blocker	.
HBASE-19043	Purge TableWrapper and CoprocessorHConnnection	Major	Coprocessors
HBASE-18991	Remove RegionMergeRequest	Trivial	.
HBASE-18927	Add the DataType which is subset of KeyValue#Type to CellBuilder for building cell	Major	.
HBASE-18833	Ensure precommit personality is up to date on all active branches	Critical	test
HBASE-10504	Define Replication Interface	Blocker	Replication
HBASE-18767	Release hbase-2.0.0-alpha-3; Theme "Scrubbed API"	Major	.
HBASE-18835	The return type of ExtendedCell#deepClone should be ExtendedCell rather than Cell	Major	.
HBASE-18766	Make TableSnapshotScanner Audience Private	Major	.
HBASE-18782	Module untangling work	Major	.
HBASE-18421	update hadoop prerequisites docs to call out 2.8.1	Major	community, dependencies, documentation
HBASE-13868	Correct "Disable automatic splitting" section in HBase book	Trivial	documentation
HBASE-17972	Remove mergePool from CompactSplitThread	Minor	regionserver
HBASE-18768	Move TestTableName to hbase-common from hbase-server	Major	.
HBASE-17967	clean up documentation references to -ROOT- table.	Minor	documentation
HBASE-18710	Move on to hbase-thirdparty 1.0.1 (it was just released).	Major	hbase-thirdparty
HBASE-18705	bin/hbase does not find cached_classpath.txt	Major	.
HBASE-18611	Copy all tests from o.a.h.h.p.TestProtobufUtil to o.a.h.h.s.p.TestProtobufUtil	Minor	Protobufs, test
HBASE-18670	Add .DS_Store to .gitignore	Minor	community
HBASE-17614	Move Backup/Restore into separate module	Blocker	.
HBASE-18660	Remove duplicate code from the checkAndPut method in HTable	Trivial	.
HBASE-18653	Undo hbase2 check against < hadoop2.6.x; i.e. implement agreed drop of hadoop 2.4 and 2.5 support in hbase2	Major	build
HBASE-18630	Prune dependencies; as is branch-2 has duplicates	Major	dependencies
HBASE-18594	Release hbase-2.0.0-alpha2	Major	.
HBASE-18623	Frequent failed to parse at EOF warnings from WALEntryStream	Minor	.
HBASE-18518	Remove jersey1* dependencies from project and jersey1* jars from lib dir	Major	dependencies, pom, REST
HBASE-18544	Move the HRegion#addRegionToMETA to TestDefaultMemStore	Minor	regionserver
HBASE-18582	Correct the docs for Mutation#setCellVisibility	Minor	documentation
HBASE-18588	Verify we're using netty .so epolling on linux post HBASE-18271	Major	test
HBASE-18514	Backport space quota "phase2" work to branch-2	Blocker	.
HBASE-18527	update nightly builds to compensate for jenkins plugin upgrades	Blocker	community, test
HBASE-18515	Introduce Delete.add as a replacement for Delete#addDeleteMarker	Major	Client
HBASE-16100	Procedure V2 - Tools	Minor	proc-v2, tooling
HBASE-15141	Procedure V2 - Web UI	Blocker	proc-v2, UI
HBASE-18465	[AMv2] remove old split region code that is no longer needed	Major	Admin, rpc
HBASE-16728	Add hadoop.profile=3.0 pass to precommit checks.	Major	build, hadoop3
HBASE-18384	Add link to refguide schema section on apache blog on hbase application archetypes	Minor	documentation
HBASE-18344	Introduce Append.addColumn as a replacement for Append.add	Trivial	.
HBASE-18364	Downgrade surefire	Major	.
HBASE-18291	Regenerate thrift2 python examples	Minor	.
HBASE-18288	Declared dependency on specific javax.ws.rs	Major	dependencies, REST
HBASE-18284	Update hbasecon asia logo on home page of hbase.apache.org	Major	.
HBASE-12794	Guidelines for filing JIRA issues	Major	documentation
HBASE-18258	Take down hbasecon2017 logo from hbase.apache.org and put up hbaseconasia2017 instead.	Major	.
HBASE-17954	Switch findbugs implementation to spotbugs	Major	build, community, test
HBASE-17898	Update dependencies	Critical	.
HBASE-18187	Release hbase-2.0.0-alpha1	Major	.
HBASE-18096	Limit HFileUtil visibility and add missing annotations	Trivial	.
HBASE-13074	Cleaned up usage of hbase.master.lease.thread.wakefrequency	Trivial	wal
HBASE-17968	Update copyright year in NOTICE file	Trivial	build
HBASE-17965	Canary tool should print the regionserver name on failure	Minor	.
HBASE-17828	Revisit the IS annotation and the documentation	Critical	API
HBASE-16215	clean up references for EOM release lines	Major	community, website
HBASE-17847	update documentation to include positions on recent Hadoop releases	Critical	community, documentation
HBASE-17834	close stale github PRs	Minor	community
HBASE-17802	Add note that minor versions can add methods to Interfaces	Major	documentation
HBASE-17782	Extend IdReadWriteLock to support using both weak and soft reference	Major	.
HBASE-17618	Refactor the implementation of modify table and delete column in MOB	Major	mob
HBASE-17609	Allow for region merging in the UI	Major	.
HBASE-16812	Clean up the locks in MOB	Minor	mob
HBASE-17502	Document hadoop pre-2.6.1 and Java 1.8 Kerberos problem in our hadoop support matrix	Major	.
HBASE-16710	Add ZStandard Codec to Compression.java	Minor	.
HBASE-17401	Remove unnecessary semicolons in hbase-annotations	Trivial	.
HBASE-17397	AggregationClient cleanup	Minor	.
HBASE-16869	Typo in "Disabling Blockcache" doc	Trivial	documentation
HBASE-17272	Doc how to run Standalone HBase over an HDFS instance; all daemons in one JVM but persisting to an HDFS instance	Major	documentation
HBASE-17121	Undo the building of xref as part of site build	Major	.
HBASE-16335	update to latest apache parent pom	Major	build, dependencies
HBASE-17046	Add 1.1 doc to hbase.apache.org	Major	website
HBASE-16955	Fixup precommit protoc check to do new distributed protos and pb 3.1.0 build	Major	build, Protobufs
HBASE-16413	Add apache-hbase.slack.com #users channel to ref guide	Minor	documentation
HBASE-16952	Replace hadoop-maven-plugins with protobuf-maven-plugin for building protos	Major	build
HBASE-16811	Remove mob sweep job	Minor	.
HBASE-16591	Add a docker file only contains java 8 for running pre commit on master	Blocker	build
HBASE-16518	Remove old .arcconfig file	Trivial	tooling
HBASE-16376	Document implicit side-effects on partial results when calling Scan#setBatch(int)	Minor	API, documentation
HBASE-16467	Move AbstractHBaseTool to hbase-common	Trivial	.
HBASE-16260	Audit dependencies for Category-X	Critical	community, dependencies
HBASE-16426	Remove company affiliations from committer list	Major	documentation, website
HBASE-16354	Clean up defunct GitHub PRs	Major	community
HBASE-15656	Fix unused protobuf warning in Admin.proto	Minor	.
HBASE-16073	update compatibility_checker for jacc dropping comma sep args	Critical	build, documentation
HBASE-15989	Remove hbase.online.schema.update.enable	Major	.
HBASE-15888	Extend HBASE-12769 for bulk load data replication	Major	Replication
HBASE-15895	remove unmaintained jenkins build analysis tool.	Minor	build
HBASE-14635	Fix flaky test TestSnapshotCloneIndependence	Major	test
HBASE-4368	Expose processlist in shell (per regionserver and perhaps by cluster)	Major	shell
HBASE-15646	Add some docs about exporting and importing snapshots using S3	Major	documentation, snapshots
HBASE-15729	Remove old JDiff wrapper scripts in dev-support	Minor	build, community
HBASE-15644	Add maven-scala-plugin for scaladoc	Major	build
HBASE-15494	Close obviated PRs on github	Major	community
HBASE-14678	Experiment: Temporarily disable balancer and a few others to see if root of crashed/timedout JVMs	Critical	test
HBASE-15502	Skeleton unit test to copy/paste	Major	documentation
HBASE-15220	Change two logs in SimpleRegionNormalizer to INFO level	Minor	.
HBASE-15017	Close out GitHub pull requests that aren't likely to update into a usable patch	Trivial	community
HBASE-14526	Remove delayed rpc	Major	.
HBASE-15099	Move RegionStateListener class out of quotas package	Minor	.
HBASE-15007	update Hadoop support matrix to list 2.6.1+ as supported	Major	documentation, Operability
HBASE-15003	Remove BoundedConcurrentLinkedQueue and associated test	Minor	util
HBASE-11985	Document sizing rules of thumb	Major	documentation
HBASE-14994	Clean up some broken links and references to old APIs	Major	documentation
HBASE-14534	Bump yammer/coda/dropwizard metrics dependency version	Minor	.
HBASE-14851	Add test showing how to use TTL from thrift	Major	test, Thrift
HBASE-14516	categorize hadoop-compat tests	Critical	build, hadoop2, test
HBASE-14308	HTableDescriptor WARN is not actionable	Minor	Usability
HBASE-14732	Update HBase website skin and CSS	Major	documentation
HBASE-14764	Stop using post-site target	Major	documentation
HBASE-14713	Remove simple deprecated-since-1.0 code in hbase-server from hbase 2.0	Major	.
HBASE-14762	Update docs about publishing website to show gitsubpub method instead of svnsubpub	Critical	documentation
HBASE-14481	Decommission HBase wiki	Blocker	documentation
HBASE-11720	Set up jenkins job to build site documentation	Minor	build, documentation
HBASE-14026	Clarify "Web API" in version and compatibility docs	Critical	documentation
HBASE-13867	Add endpoint coprocessor guide to HBase book	Major	Coprocessors, documentation
HBASE-14652	Improve / update publish-website script in dev-support	Major	scripts
HBASE-14493	Upgrade the jamon-runtime dependency	Minor	.
HBASE-14502	Purge use of jmock and remove as dependency	Major	test
HBASE-14271	Improve Nexus staging instructions	Minor	build, documentation
HBASE-14424	Document that DisabledRegionSplitPolicy blocks manual splits	Minor	documentation
HBASE-14482	Add hadoop 2.6.1 to the test-patch build list	Minor	build
HBASE-14227	Fold special cased MOB APIs into existing APIs	Blocker	mob
HBASE-14361	ReplicationSink should create Connection instances lazily	Major	Replication
HBASE-14253	update docs + build for maven 3.0.4+	Major	build, documentation
HBASE-14318	make_rc.sh should purge/re-resolve dependencies from local repository	Major	build
HBASE-14290	Spin up less threads in tests	Major	test
HBASE-14091	Update site documentation with code of conduct and project policy for transgressions	Major	documentation, website
HBASE-14288	Upgrade asciidoctor plugin to v1.5.2.1	Minor	build
HBASE-14085	Correct LICENSE and NOTICE files in artifacts	Blocker	build
HBASE-13089	Fix test compilation error on building against htrace-3.2.0-incubating	Minor	.
HBASE-14081	(outdated) references to SVN/trunk in documentation	Minor	documentation, website
HBASE-14071	Document troubleshooting unexpected filesystem usage by snapshots and WALs	Major	.
HBASE-13446	Add docs warning about missing data for downstream on versions prior to HBASE-13262	Critical	documentation
HBASE-14057	HBase shell user_permission should list super users defined on hbase-site.xml	Minor	shell
HBASE-11276	Add back support for running ChaosMonkey as standalone tool	Minor	.
HBASE-14052	Mark a few methods in CellUtil audience private since only make sense internally to hbase	Trivial	API
HBASE-14053	Disable DLR in branch-1+	Major	Recovery
HBASE-13869	Fix typo in HBase book	Trivial	documentation
HBASE-13964	Skip region normalization for tables under namespace quota	Major	Balancer, Usability
HBASE-13948	Expand hadoop2 versions built on the pre-commit	Major	build
HBASE-13956	Add myself as 1.1 release manager	Trivial	website
HBASE-13915	Remove EOL HBase versions from java and hadoop prereq tables	Major	documentation
HBASE-13929	make_rc.sh publishes empty shaded artifacts	Minor	build
HBASE-13666	book.pdf is not renamed during site build	Major	website
HBASE-13660	Add link to cloud bigtable schema modeling guide into our refguide	Major	documentation
HBASE-13799	javadoc how Scan gets polluted when used; if you set attributes or ask for scan metrics	Minor	documentation
HBASE-13726	stop using Hadoop's IOUtils	Major	dependencies
HBASE-13716	Stop using Hadoop's FSConstants	Blocker	Filesystem Integration
HBASE-13582	Update docs for HTrace	Minor	documentation
HBASE-13713	See about dropping ClassLoaderBase#getClassLoadingLock	Minor	.
HBASE-13586	Update book on Hadoop and Java supported versions for 1.1.x	Major	documentation
HBASE-11677	Make Logger instance modifiers consistent	Minor	util
HBASE-13554	Update book clarifying API stability guarantees	Major	documentation
HBASE-13487	Doc KEEP_DELETED_CELLS	Major	documentation
HBASE-13187	Add ITBLL that exercises per CF flush	Critical	integration tests
HBASE-13361	Remove or undeprecate {get|set}ScannerCaching in HTable	Minor	Client
HBASE-13310	Fix high priority findbugs warnings	Major	.
HBASE-13257	Show coverage report on jenkins	Minor	.
HBASE-13233	add hbase-11339 branch to the patch testing script	Minor	.
HBASE-13237	Improve trademark marks on the hbase.apache.org homepage	Minor	documentation
HBASE-13234	Improve the obviousness of the download link on hbase.apache.org	Minor	documentation
HBASE-7126	Update website with info on how to report security bugs	Critical	documentation
HBASE-12466	Document visibility scan label generator usage and behavior	Major	documentation, security
HBASE-13177	Document HBASE-13012	Major	documentation, mob
HBASE-11670	Build PDF of Ref Guide	Minor	documentation
HBASE-12180	Fix and reenable TestRegionReplicaReplicationEndpoint	Major	test
HBASE-12995	Document that HConnection#getTable methods do not check table existence since 0.98.1	Trivial	.
HBASE-13079	Add an admonition to Scans example that the results scanner should be closed	Major	documentation
HBASE-12168	Document Rest gateway SPNEGO-based authentication for client	Major	documentation, REST, security
HBASE-12701	Document how to set the split policy on a given table	Major	documentation
HBASE-12783	Create efficient RegionLocator implementation	Major	.
HBASE-12785	Use FutureTask to timeout the attempt to get the lock for hbck	Minor	.
HBASE-12623	Remove pre-0.96 to 0.96 upgrade code	Major	.
HBASE-12589	Forward-port fix for TestFromClientSideWithCoprocessor.testMaxKeyValueSize	Major	test
HBASE-12515	update test-patch to use git	Minor	build
HBASE-12438	Add -Dsurefire.rerunFailingTestsCount=2 to patch build runs so flakies get rerun	Major	test
HBASE-12362	Interim documentation of important master and regionserver metrics	Major	documentation
HBASE-12239	Document hedged reads	Major	documentation
HBASE-11791	Update docs on visibility tags and ACLs, transparent encryption, secure bulk upload	Major	documentation
HBASE-11961	Document region state transitions	Minor	.
HBASE-11619	Remove unused test class from TestHLogSplit	Trivial	wal
HBASE-4593	Design and document the official procedure for posting patches, commits, commit messages, etc. to smooth process and make integration with tools easier	Major	documentation
HBASE-11729	Document HFile v3	Trivial	documentation, HFile
HBASE-11606	Enable ZK-less region assignment by default	Minor	.
HBASE-10398	HBase book updates for Replication after HBASE-10322	Major	documentation
HBASE-11459	Add more doc on compression codecs, how to hook up native lib, lz4, etc.	Minor	documentation
HBASE-8450	Update hbase-default.xml and general recommendations to better suit current hw, h2, experience, etc.	Critical	Usability

NOTE: Below pre-2.0.0 changes were generated otherwise. Imported as-is, unaltered.

Release Notes - HBase - Version 1.0.0 02/20/2015

** Sub-task
    * [HBASE-11852] - Still see "UnsupportedOperationException: CollectionUsage threshold is not supported"
    * [HBASE-12485] - Maintain SeqId monotonically increasing
    * [HBASE-12511] - namespace permissions - add support from table creation privilege in a namespace 'C'
    * [HBASE-12568] - Adopt Semantic Versioning and document it in the book
    * [HBASE-12575] - Sanity check table coprocessor classes are loadable
    * [HBASE-12606] - Sanity check encryption configuration before opening WAL or onlining regions
    * [HBASE-12679] - Add HBaseInterfaceAudience.TOOLS and move some of the Public classes to LimitedPrivate
    * [HBASE-12704] - Add demo client which uses doAs functionality on Thrift-over-HTTPS.
    * [HBASE-12730] - Backport HBASE-5162 (Basic client pushback mechanism) to branch-1
    * [HBASE-12735] - Refactor TAG so it can live as unit test and as an integration test
    * [HBASE-12763] - Make it so there must be WALs for a server to be marked dead
    * [HBASE-12776] - SpliTransaction: Log number of files to be split
    * [HBASE-12779] - SplitTransaction: Add metrics
    * [HBASE-12793] - [hbck] closeRegionSilentlyAndWait() should log cause of IOException and retry until  hbase.hbck.close.timeout expires
    * [HBASE-12802] - Remove unnecessary Table.flushCommits()
    * [HBASE-12926] - Backport HBASE-12688 (Update site with a bootstrap-based UI) for HBASE-12918
    * [HBASE-12980] - Delete of a table may not clean all rows from hbase:meta

** Bug
    * [HBASE-8026] - HBase Shell docs for scan command does not reference VERSIONS
    * [HBASE-9431] - Set  'hbase.bulkload.retries.number' to 10 as HBASE-8450 claims
    * [HBASE-9910] - TestHFilePerformance and HFilePerformanceEvaluation should be merged in a single HFile performance test class.
    * [HBASE-10499] - In write heavy scenario one of the regions does not get flushed causing RegionTooBusyException
    * [HBASE-10528] - DefaultBalancer selects plans to move regions onto draining nodes
    * [HBASE-11979] - Compaction progress reporting is wrong
    * [HBASE-12028] - Abort the RegionServer, when it's handler threads die
    * [HBASE-12070] - Add an option to hbck to fix ZK inconsistencies
    * [HBASE-12108] - HBaseConfiguration: set classloader before loading xml files
    * [HBASE-12267] - Replace HTable constructor in mapreduce.* classes with ConnectionFactory
    * [HBASE-12270] - A bug in the bucket cache, with cache blocks on write enabled
    * [HBASE-12339] - WAL performance evaluation tool doesn't roll logs
    * [HBASE-12348] - preModifyColumn and preDeleteColumn in AC denies user to perform its operation though it has required rights
    * [HBASE-12393] - The regionserver web will throw exception if we disable block cache
    * [HBASE-12422] - Use ConnectionFactory in HTable constructors
    * [HBASE-12431] - Use of getColumnLatestCell(byte[], int, int, byte[], int, int) is Not Thread Safe
    * [HBASE-12454] - Setting didPerformCompaction early in HRegion#compact
    * [HBASE-12467] - Master joins cluster but never completes initialization
    * [HBASE-12480] - Regions in FAILED_OPEN/FAILED_CLOSE should be processed on master failover
    * [HBASE-12564] - consolidate the getTableDescriptors() semantic
    * [HBASE-12565] - Race condition in HRegion.batchMutate()  causes partial data to be written when region closes
    * [HBASE-12574] - Update replication metrics to not do so many map look ups.
    * [HBASE-12585] - Fix refguide so it does hbase 1.0 style API everywhere with callout on how we used to do it in pre-1.0
    * [HBASE-12607] - TestHBaseFsck#testParallelHbck fails running against hadoop 2.6.0
    * [HBASE-12611] - Create autoCommit() method and remove clearBufferOnFail
    * [HBASE-12617] - Running IntegrationTestBigLinkedList against cluster getting not an instance of org.apache.hadoop.hbase.MiniHBaseCluster
    * [HBASE-12618] - Add 'Namespace' to headers while displaying user permissions.
    * [HBASE-12622] - user_permission should require global admin to display global and ns permissions
    * [HBASE-12632] - ThrottledInputStream/ExportSnapshot does not throttle
    * [HBASE-12634] -  Fix the AccessController#requireGlobalPermission(ns) with NS
    * [HBASE-12635] - Delete acl notify znode of table after the table is deleted
    * [HBASE-12637] - Compilation with Hadoop-2.4- is broken
    * [HBASE-12642] - LoadIncrementalHFiles does not throw exception after hitting hbase.bulkload.retries.number setting
    * [HBASE-12644] - Visibility Labels: issue with storing super users in labels table
    * [HBASE-12647] - Truncate table should work with C as well
    * [HBASE-12652] - Allow unmanaged connections in MetaTableAccessor
    * [HBASE-12655] - WALPerformanceEvaluation miscalculates append/sync statistics for multiple regions
    * [HBASE-12661] - rat check fails for several files
    * [HBASE-12662] - region_status.rb is failing with NoMethodError
    * [HBASE-12663] - unify getTableDescriptors() and listTableDescriptorsByNamespace()
    * [HBASE-12664] - TestDefaultLoadBalancer.testBalanceCluster fails in CachedDNSToSwitchMapping
    * [HBASE-12665] - When aborting, dump metrics
    * [HBASE-12666] - TestAssignmentManager hanging; add timeouts
    * [HBASE-12671] - HBASE-12652 broke branch-1 builds (TestAssignmentManager fails)
    * [HBASE-12674] - Add permission check to getNamespaceDescriptor()
    * [HBASE-12675] - Use interface methods in shell scripts
    * [HBASE-12681] - truncate_preserve command fails with undefined method `getTable' error
    * [HBASE-12683] - Compilation with hadoop-2.7.0-SNAPSHOT is broken
    * [HBASE-12686] - Failures in split before PONR not clearing the daughter regions from regions in transition during rollback
    * [HBASE-12692] - NPE from SnapshotManager#stop
    * [HBASE-12694] - testTableExistsIfTheSpecifiedTableRegionIsSplitParent in TestSplitTransactionOnCluster class leaves regions in transition
    * [HBASE-12696] - Possible NPE in HRegionFileSystem#splitStoreFile when skipStoreFileRangeCheck in splitPolicy return true
    * [HBASE-12697] - Don't use RegionLocationFinder if localityCost == 0
    * [HBASE-12699] - undefined method `setAsyncLogFlush' exception thrown when setting DEFERRED_LOG_FLUSH=>true
    * [HBASE-12711] - Fix new findbugs warnings in hbase-thrift module
    * [HBASE-12715] - getLastSequenceId always returns -1
    * [HBASE-12716] - A bug in RegionSplitter.UniformSplit algorithm
    * [HBASE-12718] - Convert TestAcidGuarantees from a unit test to an integration test
    * [HBASE-12728] - buffered writes substantially less useful after removal of HTablePool
    * [HBASE-12732] - Log messages in FileLink$FileLinkInputStream#tryOpen are reversed
    * [HBASE-12739] - Avoid too large identifier of ZooKeeperWatcher
    * [HBASE-12740] - Improve performance of TestHBaseFsck
    * [HBASE-12741] - AccessController contains a javadoc issue
    * [HBASE-12742] - ClusterStatusPublisher crashes with a IPv6 network interface.
    * [HBASE-12744] - hbase-default.xml lists hbase.regionserver.global.memstore.size twice
    * [HBASE-12746] - [1.0.0RC0] Distributed Log Replay is on (HBASE-12577 was insufficient)
    * [HBASE-12747] - IntegrationTestMTTR will OOME if launched with mvn verify
    * [HBASE-12750] - getRequestsCount() in ClusterStatus returns total number of request
    * [HBASE-12767] - Fix a StoreFileScanner NPE in reverse scan flow
    * [HBASE-12771] - TestFailFast#testFastFail failing
    * [HBASE-12774] - Fix the inconsistent permission checks for bulkloading.
    * [HBASE-12781] - thrift2 listen port will bind always to the passed command line address
    * [HBASE-12782] - ITBLL fails for me if generator does anything but 5M per maptask
    * [HBASE-12791] - HBase does not attempt to clean up an aborted split when the regionserver shutting down
    * [HBASE-12798] - Map Reduce jobs should not create Tables in setConf()
    * [HBASE-12801] - Failed to truncate a table while maintaing binary region boundaries
    * [HBASE-12804] - ImportTsv fails to delete partition files created by it
    * [HBASE-12810] - Update to htrace-incubating
    * [HBASE-12811] - [AccessController] NPE while scanning a table with user not having READ permission on the namespace
    * [HBASE-12817] - Data missing while scanning using PREFIX_TREE data block encoding
    * [HBASE-12819] - ExportSnapshot doesn't close FileSystem instances
    * [HBASE-12824] - CompressionTest fails with org.apache.hadoop.hbase.io.hfile.AbstractHFileReader$NotSeekedException: Not seeked to a key/value
    * [HBASE-12831] - Changing the set of vis labels a user has access to doesn't generate an audit log event
    * [HBASE-12832] - Describe table from shell no longer shows Table's attributes, only CF attributes
    * [HBASE-12833] - [shell] table.rb leaks connections
    * [HBASE-12835] - HBASE-12422 changed new HTable(Configuration) to not use managed Connections anymore
    * [HBASE-12837] - ReplicationAdmin leaks zk connections
    * [HBASE-12844] - ServerManager.isServerReacable() should sleep between retries
    * [HBASE-12847] - TestZKLessSplitOnCluster frequently times out in 0.98 builds
    * [HBASE-12862] - Uppercase "wals" in RegionServer webUI
    * [HBASE-12863] - Master info port on RS UI is always 0
    * [HBASE-12864] - IntegrationTestTableSnapshotInputFormat fails
    * [HBASE-12874] - LoadIncrementalHFiles should use unmanaged connection
    * [HBASE-12878] - Incorrect HFile path in TestHFilePerformance print output (fix for easier debugging)
    * [HBASE-12881] - TestFastFail is not compatible with surefire.rerunFailingTestsCount
    * [HBASE-12886] - Correct tag option name in PerformanceEvaluation
    * [HBASE-12892] - Add a class to allow taking a snapshot from the command line
    * [HBASE-12897] - Minimum memstore size is a percentage
    * [HBASE-12898] - Add in used undeclared dependencies
    * [HBASE-12901] - Possible deadlock while onlining a region and get region plan for other region run parallel
    * [HBASE-12904] - Threading issues in region_mover.rb
    * [HBASE-12915] - Disallow small scan with batching
    * [HBASE-12916] - No access control for replicating WAL entries
    * [HBASE-12917] - HFilePerformanceEvaluation Scan tests fail with StackOverflowError due to recursive call in createCell function
    * [HBASE-12918] - Backport asciidoc changes
    * [HBASE-12919] - Compilation with Hadoop-2.4- is broken again
    * [HBASE-12925] - Use acl cache for doing access control checks in prepare and clean phases of Bulkloading.
    * [HBASE-12942] - After disabling the hfile block cache, Regionserver UI is throwing java.lang.NullPointerException
    * [HBASE-12956] - Binding to 0.0.0.0 is broken after HBASE-10569
    * [HBASE-12958] - SSH doing hbase:meta get but hbase:meta not assigned
    * [HBASE-12962] - TestHFileBlockIndex.testBlockIndex() commented out during HBASE-10531
    * [HBASE-12966] - NPE in HMaster while recovering tables in Enabling state
    * [HBASE-12971] - Replication stuck due to large default value for replication.source.maxretriesmultiplier
    * [HBASE-12976] - Set default value for hbase.client.scanner.max.result.size
    * [HBASE-12978] - Region goes permanently offline (WAS: hbase:meta has a row missing hregioninfo and it causes my long-running job to fail)
    * [HBASE-12984] - SSL cannot be used by the InfoPort after removing deprecated code in HBASE-10336
    * [HBASE-12985] - Javadoc warning and findbugs fixes to get us green again
    * [HBASE-12989] - region_mover.rb unloadRegions method uses ArrayList concurrently resulting in errors
    * [HBASE-12991] - Use HBase 1.0 interfaces in hbase-rest
    * [HBASE-12996] - Reversed field on Filter should be transient
    * [HBASE-12998] - Compilation with Hdfs-2.7.0-SNAPSHOT is broken after HDFS-7647
    * [HBASE-13003] - Get tests in TestHFileBlockIndex back
    * [HBASE-13009] - HBase REST UI inaccessible
    * [HBASE-13010] - HFileOutputFormat2 partitioner's path is hard-coded as '/tmp'
    * [HBASE-13026] - Wrong error message in case incorrect snapshot name OR Incorrect table name
    * [HBASE-13027] - mapreduce.TableInputFormatBase should create its own Connection if needed
    * [HBASE-13028] - Cleanup mapreduce API changes
    * [HBASE-13030] - [1.0.0 polish] Make ScanMetrics public again and align Put 'add' with Get, Delete, etc., addColumn
    * [HBASE-13037] - LoadIncrementalHFile should try to verify the content of unmatched families
    * [HBASE-13038] - Fix the java doc warning continuously reported by Hadoop QA
    * [HBASE-13039] - Add patchprocess/* to .gitignore to fix builds of branches

** Improvement
    * [HBASE-5699] - Run with > 1 WAL in HRegionServer
    * [HBASE-11195] - Potentially improve block locality during major compaction for old regions
    * [HBASE-11412] - Minimize a number of hbase-client transitive dependencies
    * [HBASE-11639] - [Visibility controller] Replicate the visibility of Cells as strings
    * [HBASE-12071] - Separate out thread pool for Master <-> RegionServer communication
    * [HBASE-12121] - maven release plugin does not allow for customized goals
    * [HBASE-12204] - Backport HBASE-12016 'Reduce number of versions in Meta table. Make it configurable' to branch-1
    * [HBASE-12373] - Provide a command to list visibility labels
    * [HBASE-12583] - Allow creating reference files even the split row not lies in the storefile range if required
    * [HBASE-12597] - Add RpcClient interface and enable changing of RpcClient implementation
    * [HBASE-12608] - region_mover.rb does not log moving region count correctly when loading regions
    * [HBASE-12630] - Provide capability for dropping malfunctioning ConfigurationObserver automatically
    * [HBASE-12640] - Add Thrift-over-HTTPS and doAs support for Thrift Server
    * [HBASE-12641] - Grant all permissions of hbase zookeeper node to hbase superuser in a secure cluster
    * [HBASE-12651] - Backport HBASE-12559 'Provide LoadBalancer with online configuration capability' to branch-1
    * [HBASE-12653] - Move TestRegionServerOnlineConfigChange & TestConfigurationManager to Junit4 tests
    * [HBASE-12659] - Replace the method calls to grant and revoke in shell scripts with AccessControlClient
    * [HBASE-12668] - Adapt PayloadCarryingRpcController so it can also be used in async way
    * [HBASE-12676] - Fix the misleading ASCII art in IntegrationTestBigLinkedList
    * [HBASE-12678] - HBCK should print command line arguments
    * [HBASE-12680] - Refactor base ClusterManager in HBase to not have the notion of sending a signal.
    * [HBASE-12719] - Add test WAL provider to quantify FSHLog overhead in the absence of HDFS.
    * [HBASE-12720] - Make InternalScan LimitedPrivate
    * [HBASE-12736] - Let MetaScanner recycle a given Connection
    * [HBASE-12745] - Visibility Labels:  support visibility labels for user groups.
    * [HBASE-12762] - Region with no hfiles will have the highest locality cost in LocalityCostFunction
    * [HBASE-12768] - Support enable cache_data_on_write in Shell while creating table
    * [HBASE-12773] - Add warning message when user is trying to bulkload a large HFile.
    * [HBASE-12825] - CallRunner exception messages should include destination host:port
    * [HBASE-12893] - IntegrationTestBigLinkedListWithVisibility should use buffered writes
    * [HBASE-12899] - HBase should prefix htrace configuration keys with "hbase.htrace" rather than just "hbase."
    * [HBASE-12929] - TableMapReduceUtil.initTableMapperJob unnecessarily limits the types of outputKeyClass and outputValueClass
    * [HBASE-12973] - RegionCoprocessorEnvironment should provide HRegionInfo directly
    * [HBASE-12979] - Use setters instead of return values for handing back statistics from HRegion methods
    * [HBASE-12997] - FSHLog should print pipeline on low replication
    * [HBASE-13008] - Better default for hbase.regionserver.regionSplitLimit parameter.

** New Feature
    * [HBASE-9531] - a command line (hbase shell) interface to retreive the replication metrics and show replication lag
    * [HBASE-10560] - Per cell TTLs
    * [HBASE-12709] - [mvn] Add unit test excludes command line flag to the build.
    * [HBASE-12731] - Heap occupancy based client pushback

** Task
    * [HBASE-12493] - User class should provide a way to re-use existing token
    * [HBASE-12567] - Track remaining issues for HBase-1.0
    * [HBASE-12624] - Remove rename_snapshot.rb from code as there is no equivalent renameSnapshot api in Admin class
    * [HBASE-12625] - Deprecate certain methods in classes annotated with InterfaceAudience.Public in branch-1
    * [HBASE-12689] - Move version on from 0.99.2 to HBASE-1.0.0-SNAPSHOT
    * [HBASE-12724] - Upgrade the interface audience of RegionScanner from Private to LimitedPrivate
    * [HBASE-12726] - Backport to branch-1.0 addendum for "Minimize a number of hbase-client transitive dependencies"
    * [HBASE-12788] - Promote Abortable to LimitedPrivate
    * [HBASE-12834] - Promote ScanType to LimitedPrivate

** Test
    * [HBASE-12163] - Move test annotation classes to the same package as in master
    * [HBASE-12645] - HBaseTestingUtility is using ${$HOME} for rootDir
    * [HBASE-12685] - TestSplitLogManager#testLogFilesAreArchived sometimes times out due to race condition
    * [HBASE-12799] - ITAG fails with java.lang.RuntimeException if table does not exist
    * [HBASE-12885] - Unit test for RAW / VERSIONS scanner specifications

Release Notes - HBase - Version 0.99.2 12/07/2014

** Sub-task
    * [HBASE-10671] - Add missing InterfaceAudience annotations for classes in hbase-common and hbase-client modules
    * [HBASE-11164] - Document and test rolling updates from 0.98 -> 1.0
    * [HBASE-11915] - Document and test 0.94 -> 1.0.0 update
    * [HBASE-11964] - Improve spreading replication load from failed regionservers
    * [HBASE-12075] - Preemptive Fast Fail
    * [HBASE-12128] - Cache configuration and RpcController selection for Table in Connection
    * [HBASE-12147] - Porting Online Config Change from 89-fb
    * [HBASE-12202] - Support DirectByteBuffer usage in HFileBlock
    * [HBASE-12214] - Visibility Controller in the peer cluster should be able to extract visibility tags from the replicated cells
    * [HBASE-12288] - Support DirectByteBuffer usage in DataBlock Encoding area
    * [HBASE-12297] - Support DBB usage in Bloom and HFileIndex area
    * [HBASE-12313] - Redo the hfile index length optimization so cell-based rather than serialized KV key
    * [HBASE-12353] - Turn down logging on some spewing unit tests
    * [HBASE-12354] - Update dependencies in time for 1.0 release
    * [HBASE-12355] - Update maven plugins
    * [HBASE-12363] - Improve how KEEP_DELETED_CELLS works with MIN_VERSIONS
    * [HBASE-12379] - Try surefire 2.18-SNAPSHOT
    * [HBASE-12400] - Fix refguide so it does connection#getTable rather than new HTable everywhere: first cut!
    * [HBASE-12404] - Task 5 from parent: Replace internal HTable constructor use with HConnection#getTable (0.98, 0.99)
    * [HBASE-12471] - Task 4. replace internal ConnectionManager#{delete,get}Connection use with #close, #createConnection (0.98, 0.99) under src/main/java
    * [HBASE-12517] - Several HConstant members are assignable
    * [HBASE-12518] - Task 4 polish. Remove CM#{get,delete}Connection
    * [HBASE-12519] - Remove tabs used as whitespace
    * [HBASE-12526] - Remove unused imports
    * [HBASE-12577] - Disable distributed log replay by default



** Bug
    * [HBASE-7211] - Improve hbase ref guide for the testing part.
    * [HBASE-9003] - TableMapReduceUtil should not rely on org.apache.hadoop.util.JarFinder#getJar
    * [HBASE-9117] - Remove HTablePool and all HConnection pooling related APIs
    * [HBASE-9157] - ZKUtil.blockUntilAvailable loops forever with non-recoverable errors
    * [HBASE-9527] - Review all old api that takes a table name as a byte array and ensure none can pass ns + tablename
    * [HBASE-10536] - ImportTsv should fail fast if any of the column family passed to the job is not present in the table
    * [HBASE-10780] - HFilePrettyPrinter#processFile should return immediately if file does not exist
    * [HBASE-11099] - Two situations where we could open a region with smaller sequence number
    * [HBASE-11562] - CopyTable should provide an option to shuffle the mapper tasks
    * [HBASE-11835] - Wrong managenement of non expected calls in the client
    * [HBASE-12017] - Use Connection.createTable() instead of HTable constructors.
    * [HBASE-12029] - Use Table and RegionLocator in HTable.getRegionLocations()
    * [HBASE-12053] - SecurityBulkLoadEndPoint set 777 permission on input data files
    * [HBASE-12072] - Standardize retry handling for master operations
    * [HBASE-12083] - Deprecate new HBaseAdmin() in favor of Connection.getAdmin()
    * [HBASE-12142] - Truncate command does not preserve ACLs table
    * [HBASE-12194] - Make TestEncodedSeekers faster
    * [HBASE-12219] - Cache more efficiently getAll() and get() in FSTableDescriptors
    * [HBASE-12226] - TestAccessController#testPermissionList failing on master
    * [HBASE-12229] - NullPointerException in SnapshotTestingUtils
    * [HBASE-12234] - Make TestMultithreadedTableMapper a little more stable.
    * [HBASE-12237] - HBaseZeroCopyByteString#wrap() should not be called in hbase-client code
    * [HBASE-12238] - A few ugly exceptions on startup
    * [HBASE-12240] - hbase-daemon.sh should remove pid file if process not found running
    * [HBASE-12241] - The crash of regionServer when taking deadserver's replication queue breaks replication
    * [HBASE-12242] - Fix new javadoc warnings in Admin, etc.
    * [HBASE-12246] - Compilation with hadoop-2.3.x and 2.2.x is broken
    * [HBASE-12247] - Replace setHTable() with initializeTable() in TableInputFormat.
    * [HBASE-12248] - broken link in hbase shell help
    * [HBASE-12252] - IntegrationTestBulkLoad fails with illegal partition error
    * [HBASE-12257] - TestAssignmentManager unsynchronized access to regionPlans
    * [HBASE-12258] - Make TestHBaseFsck less flaky
    * [HBASE-12261] - Add checkstyle to HBase build process
    * [HBASE-12263] - RegionServer listens on localhost in distributed cluster when DNS is unavailable
    * [HBASE-12265] - HBase shell 'show_filters' points to internal Facebook URL
    * [HBASE-12274] - Race between RegionScannerImpl#nextInternal() and RegionScannerImpl#close() may produce null pointer exception
    * [HBASE-12277] - Refactor bulkLoad methods in AccessController to its own interface
    * [HBASE-12278] - Race condition in TestSecureLoadIncrementalHFilesSplitRecovery
    * [HBASE-12279] - Generated thrift files were generated with the wrong parameters
    * [HBASE-12281] - ClonedPrefixTreeCell should implement HeapSize
    * [HBASE-12285] - Builds are failing, possibly because of SUREFIRE-1091
    * [HBASE-12294] - Can't build the docs after the hbase-checkstyle module was added
    * [HBASE-12301] - user_permission command does not show global permissions
    * [HBASE-12302] - VisibilityClient getAuths does not propagate remote service exception correctly
    * [HBASE-12304] - CellCounter will throw AIOBE when output directory is not specified
    * [HBASE-12306] - CellCounter output's wrong value for Total Families Across all Rows in output file
    * [HBASE-12308] - Fix typo in hbase-rest profile name
    * [HBASE-12312] - Another couple of createTable race conditions
    * [HBASE-12314] - Add chaos monkey policy to execute two actions concurrently
    * [HBASE-12315] - Fix 0.98 Tests after checkstyle got parented
    * [HBASE-12316] - test-patch.sh (Hadoop-QA) outputs the wrong release audit warnings URL
    * [HBASE-12318] - Add license header to checkstyle xml files
    * [HBASE-12319] - Inconsistencies during region recovery due to close/open of a region during recovery
    * [HBASE-12322] - Add clean up command to ITBLL
    * [HBASE-12327] - MetricsHBaseServerSourceFactory#createContextName has wrong conditions
    * [HBASE-12329] - Table create with duplicate column family names quietly succeeds
    * [HBASE-12334] - Handling of DeserializationException causes needless retry on failure
    * [HBASE-12336] - RegionServer failed to shutdown for NodeFailoverWorker thread
    * [HBASE-12337] - Import tool fails with NullPointerException if clusterIds is not initialized
    * [HBASE-12346] - Scan's default auths behavior under Visibility labels
    * [HBASE-12352] - Add hbase-annotation-tests to runtime classpath so can run hbase it tests.
    * [HBASE-12356] - Rpc with region replica does not propagate tracing spans
    * [HBASE-12359] - MulticastPublisher should specify IPv4/v6 protocol family when creating multicast channel
    * [HBASE-12366] - Add login code to HBase Canary tool.
    * [HBASE-12372] - [WINDOWS] Enable log4j configuration in hbase.cmd
    * [HBASE-12375] - LoadIncrementalHFiles fails to load data in table when CF name starts with '_'
    * [HBASE-12377] - HBaseAdmin#deleteTable fails when META region is moved around the same timeframe
    * [HBASE-12384] - TestTags can hang on fast test hosts
    * [HBASE-12386] - Replication gets stuck following a transient zookeeper error to remote peer cluster
    * [HBASE-12398] - Region isn't assigned in an extreme race condition
    * [HBASE-12399] - Master startup race between metrics and RpcServer
    * [HBASE-12402] - ZKPermissionWatcher race condition in refreshing the cache leaving stale ACLs and causing AccessDenied
    * [HBASE-12407] - HConnectionKey doesn't contain CUSTOM_CONTROLLER_CONF_KEY in CONNECTION_PROPERTIES
    * [HBASE-12414] - Move HFileLink.exists() to base class
    * [HBASE-12417] - Scan copy constructor does not retain small attribute
    * [HBASE-12419] - "Partial cell read caused by EOF" ERRORs on replication source during replication
    * [HBASE-12420] - BucketCache logged startup message is egregiously large
    * [HBASE-12423] - Use a non-managed Table in TableOutputFormat
    * [HBASE-12428] - region_mover.rb script is broken if port is not specified
    * [HBASE-12440] - Region may remain offline on clean startup under certain race condition
    * [HBASE-12445] - hbase is removing all remaining cells immediately after the cell marked with marker = KeyValue.Type.DeleteColumn via PUT
    * [HBASE-12448] - Fix rate reporting in compaction progress DEBUG logging
    * [HBASE-12449] - Use the max timestamp of current or old cell's timestamp in HRegion.append()
    * [HBASE-12450] - Unbalance chaos monkey might kill all region servers without starting them back
    * [HBASE-12459] - Use a non-managed Table in mapred.TableOutputFormat
    * [HBASE-12460] - Moving Chore to hbase-common module.
    * [HBASE-12461] - FSVisitor logging is excessive
    * [HBASE-12464] - meta table region assignment stuck in the FAILED_OPEN state due to region server not fully ready to serve
    * [HBASE-12478] - HBASE-10141 and MIN_VERSIONS are not compatible
    * [HBASE-12479] - Backport HBASE-11689 (Track meta in transition) to 0.98 and branch-1
    * [HBASE-12490] - Replace uses of setAutoFlush(boolean, boolean)
    * [HBASE-12491] - TableMapReduceUtil.findContainingJar() NPE
    * [HBASE-12495] - Use interfaces in the shell scripts
    * [HBASE-12513] - Graceful stop script does not restore the balancer state
    * [HBASE-12514] - Cleanup HFileOutputFormat legacy code
    * [HBASE-12520] - Add protected getters on TableInputFormatBase
    * [HBASE-12533] - staging directories are not deleted after secure bulk load
    * [HBASE-12536] - Reduce the effective scope of GLOBAL CREATE and ADMIN permission
    * [HBASE-12537] - HBase should log the remote host on replication error
    * [HBASE-12539] - HFileLinkCleaner logs are uselessly noisy
    * [HBASE-12541] - Add misc debug logging to hanging tests in TestHCM and TestBaseLoadBalancer
    * [HBASE-12544] - ops_mgt.xml missing in branch-1
    * [HBASE-12550] - Check all storefiles are referenced before splitting
    * [HBASE-12560] - [WINDOWS] Append the classpath from Hadoop to HBase classpath in bin/hbase.cmd
    * [HBASE-12576] - Add metrics for rolling the HLog if there are too few DN's in the write pipeline
    * [HBASE-12580] - Zookeeper instantiated even though we might not need it in the shell
    * [HBASE-12581] - TestCellACLWithMultipleVersions failing since task 5 HBASE-12404 (HBASE-12404 addendum)
    * [HBASE-12584] - Fix branch-1 failing since task 5 HBASE-12404 (HBASE-12404 addendum)
    * [HBASE-12595] - Use Connection.getTable() in table.rb
    * [HBASE-12600] - Remove REPLAY tag dependency in Distributed Replay Mode
    * [HBASE-12610] - Close connection in TableInputFormatBase
    * [HBASE-12611] - Create autoCommit() method and remove clearBufferOnFail
    * [HBASE-12614] - Potentially unclosed StoreFile(s) in DefaultCompactor#compact()
    * [HBASE-12616] - We lost the IntegrationTestBigLinkedList COMMANDS in recent usage refactoring




** Improvement
    * [HBASE-2609] - Harmonize the Get and Delete operations
    * [HBASE-4955] - Use the official versions of surefire & junit
    * [HBASE-8361] - Bulk load and other utilities should not create tables for user
    * [HBASE-8572] - Enhance delete_snapshot.rb to call snapshot deletion API with regex
    * [HBASE-10082] - Describe 'table' output is all on one line, could use better formatting
    * [HBASE-10483] - Provide API for retrieving info port when hbase.master.info.port is set to 0
    * [HBASE-11639] - [Visibility controller] Replicate the visibility of Cells as strings
    * [HBASE-11870] - Optimization : Avoid copy of key and value for tags addition in AC and VC
    * [HBASE-12161] - Add support for grant/revoke on namespaces in AccessControlClient
    * [HBASE-12243] - HBaseFsck should auto set ignorePreCheckPermission to true if no fix option is set.
    * [HBASE-12249] - Script to help you adhere to the patch-naming guidelines
    * [HBASE-12264] - ImportTsv should fail fast if output is not specified and table does not exist
    * [HBASE-12271] - Add counters for files skipped during snapshot export
    * [HBASE-12272] - Generate Thrift code through maven
    * [HBASE-12328] - Need to separate JvmMetrics for Master and RegionServer
    * [HBASE-12389] - Reduce the number of versions configured for the ACL table
    * [HBASE-12390] - Change revision style from svn to git
    * [HBASE-12411] - Optionally enable p-reads and private readers for compactions
    * [HBASE-12416] - RegionServerCallable should report what host it was communicating with
    * [HBASE-12424] - Finer grained logging and metrics for split transactions
    * [HBASE-12432] - RpcRetryingCaller should log after fixed number of retries like AsyncProcess
    * [HBASE-12434] - Add a command to compact all the regions in a regionserver
    * [HBASE-12447] - Add support for setTimeRange for RowCounter and CellCounter
    * [HBASE-12455] - Add 'description' to bean and attribute output when you do /jmx?description=true
    * [HBASE-12529] - Use ThreadLocalRandom for RandomQueueBalancer
    * [HBASE-12569] - Control MaxDirectMemorySize in the same manner as heap size

** New Feature
    * [HBASE-8707] - Add LongComparator for filter
    * [HBASE-12286] - [shell] Add server/cluster online load of configuration changes
    * [HBASE-12361] - Show data locality of region in table page
    * [HBASE-12496] - A blockedRequestsCount metric








** Task
    * [HBASE-10200] - Better error message when HttpServer fails to start due to java.net.BindException
    * [HBASE-10870] - Deprecate and replace HCD methods that have a 'should' prefix with a 'get' instead
    * [HBASE-12250] - Adding an endpoint for updating the regionserver config
    * [HBASE-12344] - Split up TestAdmin
    * [HBASE-12381] - Add maven enforcer rules for build assumptions
    * [HBASE-12388] - Document that WALObservers don't get empty edits.
    * [HBASE-12427] - Change branch-1 version from 0.99.2-SNAPSHOT to 0.99.3-SNAPSHOT
    * [HBASE-12442] - Bring KeyValue#createFirstOnRow() back to branch-1 as deprecated methods
    * [HBASE-12456] - Update surefire from 2.18-SNAPSHOT to 2.18
    * [HBASE-12516] - Clean up master so QA Bot is in known good state
    * [HBASE-12522] - Backport WAL refactoring to branch-1


** Test
    * [HBASE-12317] - Run IntegrationTestRegionReplicaPerf w.o mapred
    * [HBASE-12335] - IntegrationTestRegionReplicaPerf is flaky
    * [HBASE-12367] - Integration tests should not restore the cluster if the CM is not destructive
    * [HBASE-12378] - Add a test to verify that the read-replica is able to read after a compaction
    * [HBASE-12401] - Add some timestamp signposts in IntegrationTestMTTR
    * [HBASE-12403] - IntegrationTestMTTR flaky due to aggressive RS restart timeout
    * [HBASE-12472] - Improve debuggability of IntegrationTestBulkLoad
    * [HBASE-12549] - Fix TestAssignmentManagerOnCluster#testAssignRacingWithSSH() flaky test
    * [HBASE-12554] - TestBaseLoadBalancer may timeout due to lengthy rack lookup

** Umbrella
    * [HBASE-10602] - Cleanup HTable public interface
    * [HBASE-10856] - Prep for 1.0



Release Notes - HBase - Version 0.99.1 10/15/2014

** Sub-task
    * [HBASE-11160] - Undo append waiting on region edit/sequence id update
    * [HBASE-11178] - Remove deprecation annotations from mapred namespace
    * [HBASE-11738] - Document improvements to LoadTestTool and PerformanceEvaluation
    * [HBASE-11872] - Avoid usage of KeyValueUtil#ensureKeyValue from Compactor
    * [HBASE-11874] - Support Cell to be passed to StoreFile.Writer rather than KeyValue
    * [HBASE-11917] - Deprecate / Remove HTableUtil
    * [HBASE-11920] - Add CP hooks for ReplicationEndPoint
    * [HBASE-11930] - Document new permission check to roll WAL writer
    * [HBASE-11980] - Change sync to hsync, remove unused InfoServer, and reference our httpserver instead of hadoops
    * [HBASE-11997] - CopyTable with bulkload
    * [HBASE-12023] - HRegion.applyFamilyMapToMemstore creates too many iterator objects.
    * [HBASE-12046] - HTD/HCD setters should be builder-style
    * [HBASE-12047] - Avoid usage of KeyValueUtil#ensureKeyValue in simple cases
    * [HBASE-12050] - Avoid KeyValueUtil#ensureKeyValue from DefaultMemStore
    * [HBASE-12051] - Avoid KeyValueUtil#ensureKeyValue from DefaultMemStore
    * [HBASE-12059] - Create hbase-annotations module
    * [HBASE-12062] - Fix usage of Collections.toArray
    * [HBASE-12068] - [Branch-1] Avoid need to always do KeyValueUtil#ensureKeyValue for Filter transformCell
    * [HBASE-12069] - Finish making HFile.Writer Cell-centric; undo APIs that expect KV serializations.
    * [HBASE-12076] - Move InterfaceAudience imports to hbase-annotations
    * [HBASE-12077] - FilterLists create many ArrayList$Itr objects per row.
    * [HBASE-12079] - Deprecate KeyValueUtil#ensureKeyValue(s)
    * [HBASE-12082] - Find a way to set timestamp on Cells on the server
    * [HBASE-12086] - Fix bugs in HTableMultiplexer
    * [HBASE-12096] - In ZKSplitLog Coordination and AggregateImplementation replace enhaced for statements with basic for statement to avoid unnecessary object allocation
    * [HBASE-12104] - Some optimization and bugfix for HTableMultiplexer
    * [HBASE-12110] - Fix .arcconfig
    * [HBASE-12112] - Avoid KeyValueUtil#ensureKeyValue some more simple cases
    * [HBASE-12115] - Fix NumberFormat Exception in TableInputFormatBase.
    * [HBASE-12189] - Fix new issues found by coverity static analysis
    * [HBASE-12210] - Avoid KeyValue in Prefix Tree

** Bug
    * [HBASE-6994] - minor doc update about DEFAULT_ACCEPTABLE_FACTOR
    * [HBASE-8808] - Use Jacoco to generate Unit Test coverage reports
    * [HBASE-8936] - Fixing TestSplitLogWorker while running Jacoco tests.
    * [HBASE-9005] - Improve documentation around KEEP_DELETED_CELLS, time range scans, and delete markers
    * [HBASE-9513] - Why is PE#RandomSeekScanTest way slower in 0.96 than in 0.94?
    * [HBASE-10314] - Add Chaos Monkey that doesn't touch the master
    * [HBASE-10748] - hbase-daemon.sh fails to execute with 'sh' command
    * [HBASE-10757] - Change HTable class doc so it sends people to HCM getting instances
    * [HBASE-11145] - UNEXPECTED!!! when HLog sync: Queue full
    * [HBASE-11266] - Remove shaded references to logger
    * [HBASE-11394] - Replication can have data loss if peer id contains hyphen "-"
    * [HBASE-11401] - Late-binding sequenceid presumes a particular KeyValue mvcc format hampering experiment
    * [HBASE-11405] - Multiple invocations of hbck in parallel disables balancer permanently
    * [HBASE-11804] - Raise default heap size if unspecified
    * [HBASE-11815] - Flush and compaction could just close the tmp writer if there is an exception
    * [HBASE-11890] - HBase REST Client is hard coded to http protocol
    * [HBASE-11906] - Meta data loss with distributed log replay
    * [HBASE-11967] - HMaster in standalone won't go down if it gets 'Unhandled exception'
    * [HBASE-11974] - When a disabled table is scanned, NotServingRegionException is thrown instead of TableNotEnabledException
    * [HBASE-11982] - Bootstraping hbase:meta table creates a WAL file in region dir
    * [HBASE-11988] - AC/VC system table create on postStartMaster fails too often in test
    * [HBASE-11991] - Region states may be out of sync
    * [HBASE-11994] - PutCombiner floods the M/R log with repeated log messages.
    * [HBASE-12007] - StochasticBalancer should avoid putting user regions on master
    * [HBASE-12019] - hbase-daemon.sh overwrite HBASE_ROOT_LOGGER and HBASE_SECURITY_LOGGER variables
    * [HBASE-12024] - Fix javadoc warning
    * [HBASE-12025] - TestHttpServerLifecycle.testStartedServerWithRequestLog hangs frequently
    * [HBASE-12034] - If I kill single RS in branch-1, all regions end up on Master!
    * [HBASE-12038] - Replace internal uses of signatures with byte[] and String tableNames to use the TableName equivalents.
    * [HBASE-12041] - AssertionError in HFilePerformanceEvaluation.UniformRandomReadBenchmark
    * [HBASE-12042] - Replace internal uses of HTable(Configuration, String) with HTable(Configuration, TableName)
    * [HBASE-12043] - REST server should respond with FORBIDDEN(403) code on AccessDeniedException
    * [HBASE-12044] - REST delete operation should not retry disableTable for DoNotRetryIOException
    * [HBASE-12045] - REST proxy users configuration in hbase-site.xml is ignored
    * [HBASE-12052] - BulkLoad Failed due to no write permission on input files
    * [HBASE-12054] - bad state after NamespaceUpgrade with reserved table names
    * [HBASE-12056] - RPC logging too much in DEBUG mode
    * [HBASE-12064] - hbase.master.balancer.stochastic.numRegionLoadsToRemember is not used
    * [HBASE-12065] -  Import tool is not restoring multiple DeleteFamily markers of a row
    * [HBASE-12067] - Remove deprecated metrics classes.
    * [HBASE-12078] - Missing Data when scanning using PREFIX_TREE DATA-BLOCK-ENCODING
    * [HBASE-12095] - SecureWALCellCodec should handle the case where encryption is disabled
    * [HBASE-12098] - User granted namespace table create permissions can't create a table
    * [HBASE-12099] - TestScannerModel fails if using jackson 1.9.13
    * [HBASE-12106] - Move test annotations to test artifact
    * [HBASE-12109] - user_permission command for namespace does not return correct result
    * [HBASE-12119] - Master regionserver web UI NOT_FOUND
    * [HBASE-12120] - HBase shell doesn't allow deleting of a cell by user with W-only permissions to it
    * [HBASE-12122] - Try not to assign user regions to master all the time
    * [HBASE-12123] - Failed assertion in BucketCache after 11331
    * [HBASE-12124] - Closed region could stay closed if master stops at bad time
    * [HBASE-12126] - Region server coprocessor endpoint
    * [HBASE-12130] - HBASE-11980 calls hflush and hsync doing near double the syncing work
    * [HBASE-12134] - publish_website.sh script is too optimistic
    * [HBASE-12135] - Website is broken
    * [HBASE-12136] - Race condition between client adding tableCF replication znode and  server triggering TableCFsTracker
    * [HBASE-12137] - Alter table add cf doesn't do compression test
    * [HBASE-12139] - StochasticLoadBalancer doesn't work on large lightly loaded clusters
    * [HBASE-12140] - Add ConnectionFactory.createConnection() to create using default HBaseConfiguration.
    * [HBASE-12145] - Fix javadoc and findbugs so new folks aren't freaked when they see them
    * [HBASE-12146] - RegionServerTracker should escape data in log messages
    * [HBASE-12149] - TestRegionPlacement is failing undeterministically
    * [HBASE-12151] - Make dev scripts executable
    * [HBASE-12153] - Fixing TestReplicaWithCluster
    * [HBASE-12156] - TableName cache isn't used for one of valueOf methods.
    * [HBASE-12158] - TestHttpServerLifecycle.testStartedServerWithRequestLog goes zombie on occasion
    * [HBASE-12160] - Make Surefire's argLine configurable in the command line
    * [HBASE-12164] - Check for presence of user Id in SecureBulkLoadEndpoint#secureBulkLoadHFiles() is inaccurate
    * [HBASE-12165] - TestEndToEndSplitTransaction.testFromClientSideWhileSplitting fails
    * [HBASE-12166] - TestDistributedLogSplitting.testMasterStartsUpWithLogReplayWork
    * [HBASE-12167] - NPE in AssignmentManager
    * [HBASE-12170] - TestReplicaWithCluster.testReplicaAndReplication timeouts
    * [HBASE-12181] - Some tests create a table and try to use it before regions get assigned
    * [HBASE-12183] - FuzzyRowFilter doesn't support reverse scans
    * [HBASE-12184] - ServerShutdownHandler throws NPE
    * [HBASE-12191] - Make TestCacheOnWrite faster.
    * [HBASE-12196] - SSH should retry in case failed to assign regions
    * [HBASE-12197] - Move REST
    * [HBASE-12198] - Fix the bug of not updating location cache
    * [HBASE-12199] - Make TestAtomicOperation and TestEncodedSeekers faster
    * [HBASE-12200] - When an RPC server handler thread dies, throw exception
    * [HBASE-12206] - NPE in RSRpcServices
    * [HBASE-12209] - NPE in HRegionServer#getLastSequenceId
    * [HBASE-12218] - Make HBaseCommonTestingUtil#deleteDir try harder

** Improvement
    * [HBASE-10153] - improve VerifyReplication to compute BADROWS more accurately
    * [HBASE-10411] - [Book] Add a kerberos 'request is a replay (34)' issue at troubleshooting section
    * [HBASE-11796] - Add client support for atomic checkAndMutate
    * [HBASE-11879] - Change TableInputFormatBase to take interface arguments
    * [HBASE-11907] - Use the joni byte[] regex engine in place of j.u.regex in RegexStringComparator
    * [HBASE-11948] - graceful_stop.sh should use hbase-daemon.sh when executed on the decomissioned node
    * [HBASE-12010] - Use TableName.META_TABLE_NAME instead of indirectly from HTableDescriptor
    * [HBASE-12011] - Add namespace column during display of user tables
    * [HBASE-12013] - Make region_mover.rb support multiple regionservers per host
    * [HBASE-12021] - Hbase shell does not respect the HBASE_OPTS set by the user in console
    * [HBASE-12032] - Script to stop regionservers via RPC
    * [HBASE-12049] - Help for alter command is a bit confusing
    * [HBASE-12090] - Bytes: more Unsafe, more Faster
    * [HBASE-12118] - Explain how to grant permission to a namespace in grant command usage
    * [HBASE-12176] - WALCellCodec Encoders support for non-KeyValue Cells
    * [HBASE-12212] - HBaseTestingUtility#waitUntilAllRegionsAssigned should wait for RegionStates
    * [HBASE-12220] - Add hedgedReads and hedgedReadWins metrics

** New Feature
    * [HBASE-11990] - Make setting the start and stop row for a specific prefix easier
    * [HBASE-11995] - Use Connection and ConnectionFactory where possible
    * [HBASE-12127] - Move the core Connection creation functionality into ConnectionFactory
    * [HBASE-12133] - Add FastLongHistogram for metric computation
    * [HBASE-12143] - Minor fix for Table code

** Task
    * [HBASE-9004] - Fix Documentation around Minor compaction and ttl
    * [HBASE-11692] - Document how and why to do a manual region split
    * [HBASE-11730] - Document release managers for non-deprecated branches
    * [HBASE-11761] - Add a FAQ item for updating a maven-managed application from 0.94 -> 0.96+
    * [HBASE-11960] - Provide a sample to show how to use Thrift client authentication
    * [HBASE-11978] - Backport 'HBASE-7767 Get rid of ZKTable, and table enable/disable state in ZK' to 1.0
    * [HBASE-11981] - Document how to find the units of measure for a given HBase metric

** Test
    * [HBASE-11798] - TestBucketWriterThread may hang due to WriterThread stopping prematurely
    * [HBASE-11838] - Enable PREFIX_TREE in integration tests
    * [HBASE-12008] - Remove IntegrationTestImportTsv#testRunFromOutputCommitter
    * [HBASE-12055] - TestBucketWriterThread hangs flakily based on timing


Release Notes - HBase - Version 0.99.0 9/22/2014

** Sub-task
    * [HBASE-2251] - PE defaults to 1k rows - uncommon use case, and easy to hit benchmarks
    * [HBASE-5175] - Add DoubleColumnInterpreter
    * [HBASE-6873] - Clean up Coprocessor loading failure handling
    * [HBASE-8541] - implement flush-into-stripes in stripe compactions
    * [HBASE-9149] - javadoc cleanup of to reflect .META. rename to hbase:meta
    * [HBASE-9261] - Add cp hooks after {start|close}RegionOperation
    * [HBASE-9489] - Add cp hooks in online merge before and after setting PONR
    * [HBASE-9846] - Integration test and LoadTestTool support for cell ACLs
    * [HBASE-9858] - Integration test and LoadTestTool support for cell Visibility
    * [HBASE-9889] - Make sure we clean up scannerReadPoints upon any exceptions
    * [HBASE-9941] - The context ClassLoader isn't set while calling into a coprocessor
    * [HBASE-9966] - Create IntegrationTest for Online Bloom Filter Change
    * [HBASE-9977] - Define C interface of HBase Client Asynchronous APIs
    * [HBASE-10043] - Fix Potential Resouce Leak in MultiTableInputFormatBase
    * [HBASE-10094] - Add batching to HLogPerformanceEvaluation
    * [HBASE-10110] - Fix Potential Resource Leak in StoreFlusher
    * [HBASE-10124] - Make Sub Classes Static When Possible
    * [HBASE-10143] - Clean up dead local stores in FSUtils
    * [HBASE-10150] - Write attachment Id of tested patch into JIRA comment
    * [HBASE-10156] - FSHLog Refactor (WAS -> Fix up the HBASE-8755 slowdown when low contention)
    * [HBASE-10158] - Add sync rate histogram to HLogPE
    * [HBASE-10169] - Batch coprocessor
    * [HBASE-10297] - LoadAndVerify Integration Test for cell visibility
    * [HBASE-10347] - HRegionInfo changes for adding replicaId and MetaEditor/MetaReader changes for region replicas
    * [HBASE-10348] - HTableDescriptor changes for region replicas
    * [HBASE-10350] - Master/AM/RegionStates changes to create and assign region replicas
    * [HBASE-10351] - LoadBalancer changes for supporting region replicas
    * [HBASE-10352] - Region and RegionServer changes for opening region replicas, and refreshing store files
    * [HBASE-10354] - Add an API for defining consistency per request
    * [HBASE-10355] - Failover RPC's from client using region replicas
    * [HBASE-10356] - Failover RPC's for multi-get
    * [HBASE-10357] - Failover RPC's for scans
    * [HBASE-10359] - Master/RS WebUI changes for region replicas
    * [HBASE-10361] - Enable/AlterTable support for region replicas
    * [HBASE-10362] - HBCK changes for supporting region replicas
    * [HBASE-10391] - Deprecate KeyValue#getBuffer
    * [HBASE-10420] - Replace KV.getBuffer with KV.get{Row|Family|Qualifier|Value|Tags}Array
    * [HBASE-10513] - Provide user documentation for region replicas
    * [HBASE-10517] - NPE in MetaCache.clearCache()
    * [HBASE-10519] - Add handling for swallowed InterruptedException thrown by Thread.sleep in rest related files
    * [HBASE-10520] - Add handling for swallowed InterruptedException thrown by Thread.sleep in MiniZooKeeperCluster
    * [HBASE-10521] - Add handling for swallowed InterruptedException thrown by Thread.sleep in RpcServer
    * [HBASE-10522] - Correct wrong handling and add proper handling for swallowed InterruptedException thrown by Thread.sleep in client
    * [HBASE-10523] - Correct wrong handling and add proper handling for swallowed InterruptedException thrown by Thread.sleep in util
    * [HBASE-10524] - Correct wrong handling and add proper handling for swallowed InterruptedException thrown by Thread.sleep in regionserver
    * [HBASE-10526] - Using Cell instead of KeyValue in HFileOutputFormat
    * [HBASE-10529] - Make Cell extend Cloneable
    * [HBASE-10530] - Add util methods in CellUtil
    * [HBASE-10531] - Revisit how the key byte[] is passed to HFileScanner.seekTo and reseekTo
    * [HBASE-10532] - Make KeyValueComparator in KeyValue to accept Cell instead of KeyValue.
    * [HBASE-10550] - Register HBase tokens with ServiceLoader
    * [HBASE-10561] - Forward port: HBASE-10212 New rpc metric: number of active handler
    * [HBASE-10572] - Create an IntegrationTest for region replicas
    * [HBASE-10573] - Use Netty 4
    * [HBASE-10616] - Integration test for multi-get calls
    * [HBASE-10620] - LoadBalancer.needsBalance() should check for co-located region replicas as well
    * [HBASE-10630] - NullPointerException in ConnectionManager$HConnectionImplementation.locateRegionInMeta() due to missing region info
    * [HBASE-10633] - StoreFileRefresherChore throws ConcurrentModificationException sometimes
    * [HBASE-10634] - Multiget doesn't fully work
    * [HBASE-10648] - Pluggable Memstore
    * [HBASE-10650] - Fix incorrect handling of IE that restores current thread's interrupt status within while/for loops in RegionServer
    * [HBASE-10651] - Fix incorrect handling of IE that restores current thread's interrupt status within while/for loops in Replication
    * [HBASE-10652] - Fix incorrect handling of IE that restores current thread's interrupt status within while/for loops in rpc
    * [HBASE-10661] - TestStochasticLoadBalancer.testRegionReplicationOnMidClusterWithRacks() is flaky
    * [HBASE-10672] - Table snapshot should handle tables whose REGION_REPLICATION is greater than one
    * [HBASE-10680] - Check if the block keys, index keys can be used as Cells instead of byte[]
    * [HBASE-10688] - Add a draining_node script to manage nodes in draining mode
    * [HBASE-10691] - test-patch.sh should continue even if compilation against hadoop 1.0 / 1.1 fails
    * [HBASE-10697] - Convert TestSimpleTotalOrderPartitioner to junit4 test
    * [HBASE-10701] - Cache invalidation improvements from client side
    * [HBASE-10704] - BaseLoadBalancer#roundRobinAssignment() may add same region to assignment plan multiple times
    * [HBASE-10717] - TestFSHDFSUtils#testIsSameHdfs fails with IllegalArgumentException running against hadoop 2.3
    * [HBASE-10723] - Convert TestExplicitColumnTracker to junit4 test
    * [HBASE-10729] - Enable table doesn't balance out replicas evenly if the replicas were unassigned earlier
    * [HBASE-10734] - Fix RegionStates.getRegionAssignments to not add duplicate regions
    * [HBASE-10741] - Deprecate HTablePool and HTableFactory
    * [HBASE-10743] - Replica map update is problematic in RegionStates
    * [HBASE-10750] - Pluggable MemStoreLAB
    * [HBASE-10778] - Unique keys accounting in MultiThreadedReader is incorrect
    * [HBASE-10779] - Doc hadoop1 deprecated in 0.98 and NOT supported in hbase 1.0
    * [HBASE-10781] - Remove hadoop-one-compat module and all references to hadoop1
    * [HBASE-10791] - Add integration test to demonstrate performance improvement
    * [HBASE-10794] - multi-get should handle replica location missing from cache
    * [HBASE-10796] - Set default log level as INFO
    * [HBASE-10801] - Ensure DBE interfaces can work with Cell
    * [HBASE-10810] - LoadTestTool should share the connection and connection pool
    * [HBASE-10815] - Master regionserver should be rolling-upgradable
    * [HBASE-10817] - Add some tests on a real cluster for replica: multi master, replication
    * [HBASE-10818] - Add integration test for bulkload with replicas
    * [HBASE-10822] - Thread local addendum to HBASE-10656 Counter
    * [HBASE-10841] - Scan,Get,Put,Delete,etc setters should consistently return this
    * [HBASE-10855] - Enable hfilev3 by default
    * [HBASE-10858] - TestRegionRebalancing is failing
    * [HBASE-10859] - Use HFileLink in opening region files from secondaries
    * [HBASE-10888] - Enable distributed log replay as default
    * [HBASE-10915] - Decouple region closing (HM and HRS) from ZK
    * [HBASE-10918] - [VisibilityController] System table backed ScanLabelGenerator
    * [HBASE-10929] - Change ScanQueryMatcher to use Cells instead of KeyValue.
    * [HBASE-10930] - Change Filters and GetClosestRowBeforeTracker to work with Cells
    * [HBASE-10957] - HBASE-10070: HMaster can abort with NPE in #rebuildUserRegions
    * [HBASE-10962] - Decouple region opening (HM and HRS) from ZK
    * [HBASE-10963] - Refactor cell ACL tests
    * [HBASE-10972] - OOBE in prefix key encoding
    * [HBASE-10985] - Decouple Split Transaction from Zookeeper
    * [HBASE-10993] - Deprioritize long-running scanners
    * [HBASE-11025] - Infrastructure for pluggable consensus service
    * [HBASE-11027] - Remove kv.isDeleteXX() and related methods and use CellUtil apis.
    * [HBASE-11053] - Change DeleteTracker APIs to work with Cell
    * [HBASE-11054] - Create new hook in StoreScanner to help user creating his own delete tracker
    * [HBASE-11059] - ZK-less region assignment
    * [HBASE-11069] - Decouple region merging from ZooKeeper
    * [HBASE-11072] - Abstract WAL splitting from ZK
    * [HBASE-11077] - [AccessController] Restore compatible early-out access denial
    * [HBASE-11088] - Support Visibility Expression Deletes in Shell
    * [HBASE-11092] - Server interface should have method getConsensusProvider()
    * [HBASE-11094] - Distributed log replay is incompatible for rolling restarts
    * [HBASE-11098] - Improve documentation around our blockcache options
    * [HBASE-11101] - Documentation review
    * [HBASE-11102] - Document JDK versions supported by each release
    * [HBASE-11108] - Split ZKTable into interface and implementation
    * [HBASE-11109] - flush region sequence id may not be larger than all edits flushed
    * [HBASE-11135] - Change region sequenceid generation so happens earlier in the append cycle rather than just before added to file
    * [HBASE-11140] - LocalHBaseCluster should create ConsensusProvider per each server
    * [HBASE-11161] - Provide example of POJO encoding with protobuf
    * [HBASE-11171] - More doc improvements on block cache options
    * [HBASE-11214] - Fixes for scans on a replicated table
    * [HBASE-11229] - Change block cache percentage metrics to be doubles rather than ints
    * [HBASE-11280] - Document distributed log replay and distributed log splitting
    * [HBASE-11307] - Deprecate SlabCache
    * [HBASE-11318] - Classes in security subpackages missing @InterfaceAudience annotations.
    * [HBASE-11332] - Fix for metas location cache from HBASE-10785
    * [HBASE-11367] - Pluggable replication endpoint
    * [HBASE-11372] - Remove SlabCache
    * [HBASE-11384] - [Visibility Controller]Check for users covering authorizations for every mutation
    * [HBASE-11395] - Add logging for HBase table operations
    * [HBASE-11471] - Move TableStateManager and ZkTableStateManager and Server to hbase-server
    * [HBASE-11483] - Check the rest of the book for new XML validity errors and fix
    * [HBASE-11508] - Document changes to IPC config parameters from HBASE-11492
    * [HBASE-11511] - Write flush events to WAL
    * [HBASE-11512] - Write region open/close events to WAL
    * [HBASE-11520] - Simplify offheap cache config by removing the confusing "hbase.bucketcache.percentage.in.combinedcache"
    * [HBASE-11559] - Add dumping of DATA block usage to the BlockCache JSON report.
    * [HBASE-11572] - Add support for doing get/scans against a particular replica_id
    * [HBASE-11573] - Report age on eviction
    * [HBASE-11610] - Enhance remote meta updates
    * [HBASE-11651] - Add conf which disables MetaMigrationConvertingToPB check (for experts only)
    * [HBASE-11722] - Document new shortcut commands introduced by HBASE-11649
    * [HBASE-11734] - Document changed behavior of hbase.hstore.time.to.purge.deletes
    * [HBASE-11736] - Document SKIP_FLUSH snapshot option
    * [HBASE-11737] - Document callQueue improvements from HBASE-11355 and HBASE-11724
    * [HBASE-11739] - Document blockCache contents report in the UI
    * [HBASE-11740] - RegionStates.getRegionAssignments() gets stuck on clone
    * [HBASE-11752] - Document blockcache prefetch option
    * [HBASE-11753] - Document HBASE_SHELL_OPTS environment variable
    * [HBASE-11781] - Document new TableMapReduceUtil scanning options
    * [HBASE-11784] - Document global configuration for maxVersion
    * [HBASE-11822] - Convert EnvironmentEdge#getCurrentTimeMillis to getCurrentTime
    * [HBASE-11919] - Remove the deprecated pre/postGet CP hook
    * [HBASE-11923] - Potential race condition in RecoverableZookeeper.checkZk()
    * [HBASE-11934] - Support KeyValueCodec to encode non KeyValue cells.
    * [HBASE-11941] - Rebuild site because of major structural changes to HTML
    * [HBASE-11963] - Synchronize peer cluster replication connection attempts

** Brainstorming
    * [HBASE-9507] - Promote methods of WALActionsListener to WALObserver
    * [HBASE-11209] - Increase the default value for hbase.hregion.memstore.block.multipler from 2 to 4

** Bug
    * [HBASE-3787] - Increment is non-idempotent but client retries RPC
    * [HBASE-4931] - CopyTable instructions could be improved.
    * [HBASE-5356] - region_mover.rb can hang if table region it belongs to is deleted.
    * [HBASE-6506] - Setting CACHE_BLOCKS to false in an hbase shell scan doesn't work
    * [HBASE-6642] - enable_all,disable_all,drop_all can call "list" command with regex directly.
    * [HBASE-6701] - Revisit thrust of paragraph on splitting
    * [HBASE-7226] - HRegion.checkAndMutate uses incorrect comparison result for <, <=, > and >=
    * [HBASE-7963] - HBase VerifyReplication not working when security enabled
    * [HBASE-8112] - Deprecate HTable#batch(final List<? extends Row>)
    * [HBASE-8269] - Fix data locallity documentation.
    * [HBASE-8304] - Bulkload fails to remove files if fs.default.name / fs.defaultFS is configured without default port
    * [HBASE-8529] - checkOpen is missing from multi, mutate, get and multiGet etc.
    * [HBASE-8701] - distributedLogReplay need to apply wal edits in the receiving order of those edits
    * [HBASE-8713] - [hadoop1] Log spam each time the WAL is rolled
    * [HBASE-8803] - region_mover.rb should move multiple regions at a time
    * [HBASE-8817] - Enhance The Apache HBase Reference Guide
    * [HBASE-9151] - HBCK cannot fix when meta server znode deleted, this can happen if all region servers stopped and there are no logs to split.
    * [HBASE-9292] - Syncer fails but we won't go down
    * [HBASE-9294] - NPE in /rs-status during RS shutdown
    * [HBASE-9346] - HBCK should provide an option to check if regions boundaries are the same in META and in stores.
    * [HBASE-9445] - Snapshots should create column family dirs for empty regions
    * [HBASE-9473] - Change UI to list 'system tables' rather than 'catalog tables'.
    * [HBASE-9485] - TableOutputCommitter should implement recovery if we don't want jobs to start from 0 on RM restart
    * [HBASE-9708] - Improve Snapshot Name Error Message
    * [HBASE-9721] - RegionServer should not accept regionOpen RPC intended for another(previous) server
    * [HBASE-9745] - Append HBASE_CLASSPATH to end of Java classpath and use another env var for prefix
    * [HBASE-9746] - RegionServer can't start when replication tries to replicate to an unknown host
    * [HBASE-9754] - Eliminate threadlocal from MVCC code
    * [HBASE-9778] - Add hint to ExplicitColumnTracker to avoid seeking
    * [HBASE-9990] - HTable uses the conf for each "newCaller"
    * [HBASE-10018] - Remove region location prefetching
    * [HBASE-10061] - TableMapReduceUtil.findOrCreateJar calls updateMap(null, ) resulting in thrown NPE
    * [HBASE-10069] - Potential duplicate calls to log#appendNoSync() in HRegion#doMiniBatchMutation()
    * [HBASE-10073] - Revert HBASE-9718 (Add a test scope dependency on org.slf4j:slf4j-api to hbase-client)
    * [HBASE-10079] - Race in TableName cache
    * [HBASE-10080] - Unnecessary call to locateRegion when creating an HTable instance
    * [HBASE-10084] - [WINDOWS] bin\hbase.cmd should allow whitespaces in java.library.path and classpath
    * [HBASE-10087] - Store should be locked during a memstore snapshot
    * [HBASE-10090] - Master could hang in assigning meta
    * [HBASE-10097] - Remove a region name string creation in HRegion#nextInternal
    * [HBASE-10098] - [WINDOWS] pass in native library directory from hadoop for unit tests
    * [HBASE-10099] - javadoc warning introduced by LabelExpander 188: warning - @return tag has no arguments
    * [HBASE-10101] - testOfflineRegionReAssginedAfterMasterRestart times out sometimes.
    * [HBASE-10103] - TestNodeHealthCheckChore#testRSHealthChore: Stoppable must have been stopped
    * [HBASE-10107] - [JDK7] TestHBaseSaslRpcClient.testHBaseSaslRpcClientCreation failing on Jenkins
    * [HBASE-10108] - NullPointerException thrown while use Canary with '-regionserver' option
    * [HBASE-10112] - Hbase rest query params for maxVersions and maxValues are not parsed
    * [HBASE-10114] - _scan_internal() in table.rb should accept argument that specifies reverse scan
    * [HBASE-10117] - Avoid synchronization in HRegionScannerImpl.isFilterDone
    * [HBASE-10118] - Major compact keeps deletes with future timestamps
    * [HBASE-10120] - start-hbase.sh doesn't respect --config in non-distributed mode
    * [HBASE-10123] - Change default ports; move them out of linux ephemeral port range
    * [HBASE-10132] - sun.security.pkcs11.wrapper.PKCS11Exception: CKR_ARGUMENTS_BAD
    * [HBASE-10135] - Remove ? extends from HLogSplitter#getOutputCounts
    * [HBASE-10137] - GeneralBulkAssigner with retain assignment plan can be used in EnableTableHandler to bulk assign the regions
    * [HBASE-10138] - incorrect or confusing test value is used in block caches
    * [HBASE-10142] - TestLogRolling#testLogRollOnDatanodeDeath test failure
    * [HBASE-10146] - Bump HTrace version to 2.04
    * [HBASE-10148] - [VisibilityController] Tolerate regions in recovery
    * [HBASE-10149] - TestZKPermissionsWatcher.testPermissionsWatcher test failure
    * [HBASE-10155] - HRegion isRecovering state is wrongly coming in postOpen hook
    * [HBASE-10161] - [AccessController] Tolerate regions in recovery
    * [HBASE-10163] - Example Thrift DemoClient is flaky
    * [HBASE-10176] - Canary#sniff() should close the HTable instance
    * [HBASE-10178] - Potential null object dereference in TablePermission#equals()
    * [HBASE-10179] - HRegionServer underreports readRequestCounts by 1 under certain conditions
    * [HBASE-10182] - Potential null object deference in AssignmentManager#handleRegion()
    * [HBASE-10186] - region_mover.rb broken because ServerName constructor is changed to private
    * [HBASE-10187] - AccessController#preOpen - Include 'labels' table also into special tables list.
    * [HBASE-10193] - Cleanup HRegion if one of the store fails to open at region initialization
    * [HBASE-10194] - [Usability]: Instructions in CompactionTool no longer accurate because of namespaces
    * [HBASE-10196] - Enhance HBCK to understand the case after online region merge
    * [HBASE-10205] - ConcurrentModificationException in BucketAllocator
    * [HBASE-10207] - ZKVisibilityLabelWatcher : Populate the labels cache on startup
    * [HBASE-10210] - during master startup, RS can be you-are-dead-ed by master in error
    * [HBASE-10215] - TableNotFoundException should be thrown after removing stale znode in ETH
    * [HBASE-10219] - HTTPS support for HBase in RegionServerListTmpl.jamon
    * [HBASE-10220] - Put all test service principals into the superusers list
    * [HBASE-10221] - Region from coprocessor invocations can be null on failure
    * [HBASE-10223] - [VisibilityController] cellVisibility presence check on Delete mutation is wrong
    * [HBASE-10225] - Bug in calls to RegionObsever.postScannerFilterRow
    * [HBASE-10226] - [AccessController] Namespace grants not always checked
    * [HBASE-10231] - Potential NPE in HBaseFsck#checkMetaRegion()
    * [HBASE-10232] - Remove native profile from hbase-shell
    * [HBASE-10233] - VisibilityController is too chatty at DEBUG level
    * [HBASE-10249] - TestReplicationSyncUpTool fails because failover takes too long
    * [HBASE-10251] - Restore API Compat for PerformanceEvaluation.generateValue()
    * [HBASE-10260] - Canary Doesn't pick up Configuration properly.
    * [HBASE-10264] - [MapReduce]: CompactionTool in mapred mode is missing classes in its classpath
    * [HBASE-10267] - TestNamespaceCommands occasionally fails
    * [HBASE-10268] - TestSplitLogWorker occasionally fails
    * [HBASE-10271] - [regression] Cannot use the wildcard address since HBASE-9593
    * [HBASE-10272] - Cluster becomes nonoperational if the node hosting the active Master AND ROOT/META table goes offline
    * [HBASE-10274] - MiniZookeeperCluster should close ZKDatabase when shutdown ZooKeeperServers
    * [HBASE-10284] - Build broken with svn 1.8
    * [HBASE-10292] - TestRegionServerCoprocessorExceptionWithAbort fails occasionally
    * [HBASE-10298] - TestIOFencing occasionally fails
    * [HBASE-10302] - Fix rat check issues in hbase-native-client.
    * [HBASE-10304] - Running an hbase job jar: IllegalAccessError: class com.google.protobuf.ZeroCopyLiteralByteString cannot access its superclass com.google.protobuf.LiteralByteString
    * [HBASE-10307] - IntegrationTestIngestWithEncryption assumes localhost cluster
    * [HBASE-10310] - ZNodeCleaner session expired for /hbase/master
    * [HBASE-10312] - Flooding the cluster with administrative actions leads to collapse
    * [HBASE-10313] - Duplicate servlet-api jars in hbase 0.96.0
    * [HBASE-10315] - Canary shouldn't exit with 3 if there is no master running.
    * [HBASE-10316] - Canary#RegionServerMonitor#monitorRegionServers() should close the scanner returned by table.getScanner()
    * [HBASE-10317] - getClientPort method of MiniZooKeeperCluster does not always return the correct value
    * [HBASE-10318] - generate-hadoopX-poms.sh expects the version to have one extra '-'
    * [HBASE-10320] - Avoid ArrayList.iterator() ExplicitColumnTracker
    * [HBASE-10321] - CellCodec has broken the 96 client to 98 server compatibility
    * [HBASE-10322] - Strip tags from KV while sending back to client on reads
    * [HBASE-10326] - Super user should be able scan all the cells irrespective of the visibility labels
    * [HBASE-10327] - Remove remove(K, V) from type PoolMap<K,V>
    * [HBASE-10329] - Fail the writes rather than proceeding silently to prevent data loss when AsyncSyncer encounters null writer and its writes aren't synced by other Asyncer
    * [HBASE-10330] - TableInputFormat/TableRecordReaderImpl leaks HTable
    * [HBASE-10332] - Missing .regioninfo file during daughter open processing
    * [HBASE-10333] - Assignments are not retained on a cluster start
    * [HBASE-10334] - RegionServer links in table.jsp is broken
    * [HBASE-10335] - AuthFailedException in zookeeper may block replication forever
    * [HBASE-10336] - Remove deprecated usage of Hadoop HttpServer in InfoServer
    * [HBASE-10337] - HTable.get() uninteruptible
    * [HBASE-10338] - Region server fails to start with AccessController coprocessor if installed into RegionServerCoprocessorHost
    * [HBASE-10339] - Mutation::getFamilyMap method was lost in 98
    * [HBASE-10349] - Table became unusable when master balanced its region after table was dropped
    * [HBASE-10365] - HBaseFsck should clean up connection properly when repair is completed
    * [HBASE-10370] - Compaction in out-of-date Store causes region split failure
    * [HBASE-10371] - Compaction creates empty hfile, then selects this file for compaction and creates empty hfile and over again
    * [HBASE-10375] - hbase-default.xml hbase.status.multicast.address.port does not match code
    * [HBASE-10384] - Failed to increment serveral columns in one Increment
    * [HBASE-10392] - Correct references to hbase.regionserver.global.memstore.upperLimit
    * [HBASE-10397] - Fix findbugs introduced from HBASE-9426
    * [HBASE-10400] - [hbck] Continue if region dir missing on region merge attempt
    * [HBASE-10401] - [hbck] perform overlap group merges in parallel
    * [HBASE-10407] - String Format Exception
    * [HBASE-10412] - Distributed log replay : Cell tags getting missed
    * [HBASE-10413] - Tablesplit.getLength returns 0
    * [HBASE-10417] - index is not incremented in PutSortReducer#reduce()
    * [HBASE-10422] - ZeroCopyLiteralByteString.zeroCopyGetBytes has an unusable prototype and conflicts with AsyncHBase
    * [HBASE-10426] - user_permission in security.rb calls non-existent UserPermission#getTable method
    * [HBASE-10428] - Test jars should have scope test
    * [HBASE-10429] - Make Visibility Controller to throw a better msg if it is of type RegionServerCoprocessor
    * [HBASE-10431] - Rename com.google.protobuf.ZeroCopyLiteralByteString
    * [HBASE-10432] - Rpc retries non-recoverable error
    * [HBASE-10433] - SecureProtobufWALReader does not handle unencrypted WALs if configured to encrypt
    * [HBASE-10434] - Store Tag compression information for a WAL in its header
    * [HBASE-10435] - Lower the log level of Canary region server match
    * [HBASE-10436] - restore regionserver lists removed from hbase 0.96+ jmx
    * [HBASE-10438] - NPE from LRUDictionary when size reaches the max init value
    * [HBASE-10441] - [docs] nit default max versions is now 1 instead of 3 after HBASE-8450
    * [HBASE-10442] - prepareDelete() isn't called before doPreMutationHook for a row deletion case
    * [HBASE-10443] - IndexOutOfBoundExceptions when processing compressed tags in HFile
    * [HBASE-10446] - Backup master gives Error 500 for debug dump
    * [HBASE-10447] - Memstore flusher scans storefiles also when the scanner heap gets reset
    * [HBASE-10448] - ZKUtil create and watch methods don't set watch in some cases
    * [HBASE-10449] - Wrong execution pool configuration in HConnectionManager
    * [HBASE-10451] - Enable back Tag compression on HFiles
    * [HBASE-10452] - Fix potential bugs in exception handlers
    * [HBASE-10454] - Tags presence file info can be wrong in HFiles when PrefixTree encoding is used
    * [HBASE-10455] - cleanup InterruptedException management
    * [HBASE-10456] - Balancer should not run if it's just turned off.
    * [HBASE-10458] - Typo in book chapter 9 architecture.html
    * [HBASE-10459] - Broken link F.1. HBase Videos
    * [HBASE-10460] - Return value of Scan#setSmall() should be void
    * [HBASE-10461] - table.close() in TableEventHandler#reOpenAllRegions() should be enclosed in finally block
    * [HBASE-10469] - Hbase book client.html has a broken link
    * [HBASE-10470] - Import generates huge log file while importing large amounts of data
    * [HBASE-10472] - Manage the interruption in ZKUtil#getData
    * [HBASE-10476] - HBase Master log grows very fast after stopped hadoop (due to connection exception)
    * [HBASE-10477] - Regression from HBASE-10337
    * [HBASE-10478] - Hbase book presentations page has broken link
    * [HBASE-10481] - API Compatibility JDiff script does not properly handle arguments in reverse order
    * [HBASE-10482] - ReplicationSyncUp doesn't clean up its ZK, needed for tests
    * [HBASE-10485] - PrefixFilter#filterKeyValue() should perform filtering on row key
    * [HBASE-10486] - ProtobufUtil Append & Increment deserialization lost cell level timestamp
    * [HBASE-10488] - 'mvn site' is broken due to org.apache.jasper.JspC not found
    * [HBASE-10490] - Simplify RpcClient code
    * [HBASE-10493] - InclusiveStopFilter#filterKeyValue() should perform filtering on row key
    * [HBASE-10495] - upgrade script is printing usage two times with help option.
    * [HBASE-10500] - Some tools OOM when BucketCache is enabled
    * [HBASE-10501] - Improve IncreasingToUpperBoundRegionSplitPolicy to avoid too many regions
    * [HBASE-10506] - Fail-fast if client connection is lost before the real call be executed in RPC layer
    * [HBASE-10510] - HTable is not closed in LoadTestTool#loadTable()
    * [HBASE-10514] - Forward port HBASE-10466, possible data loss when failed flushes
    * [HBASE-10516] - Refactor code where Threads.sleep is called within a while/for loop
    * [HBASE-10525] - Allow the client to use a different thread for writing to ease interrupt
    * [HBASE-10533] - commands.rb is giving wrong error messages on exceptions
    * [HBASE-10534] - Rowkey in TsvImporterTextMapper initializing with wrong length
    * [HBASE-10537] - Let the ExportSnapshot mapper fail and retry on error
    * [HBASE-10539] - HRegion.addAndGetGlobalMemstoreSize returns previous size
    * [HBASE-10545] - RS Hangs waiting on region to close on shutdown; has to timeout before can go down
    * [HBASE-10546] - Two scanner objects are open for each hbase map task but only one scanner object is closed
    * [HBASE-10547] - TestFixedLengthWrapper#testReadWrite occasionally fails with the IBM JDK
    * [HBASE-10548] - Correct commons-math dependency version
    * [HBASE-10549] - When there is a hole, LoadIncrementalHFiles will hang in an infinite loop.
    * [HBASE-10552] - HFilePerformanceEvaluation.GaussianRandomReadBenchmark fails sometimes.
    * [HBASE-10556] - Possible data loss due to non-handled DroppedSnapshotException for user-triggered flush from client/shell
    * [HBASE-10563] - Set name for FlushHandler thread
    * [HBASE-10564] - HRegionServer.nextLong should be removed since it's not used anywhere, or should be used somewhere it meant to
    * [HBASE-10565] - FavoredNodesPlan accidentally uses an internal Netty type
    * [HBASE-10566] - cleanup rpcTimeout in the client
    * [HBASE-10567] - Add overwrite manifest option to ExportSnapshot
    * [HBASE-10575] - ReplicationSource thread can't be terminated if it runs into the loop to contact peer's zk ensemble and fails continuously
    * [HBASE-10579] - [Documentation]: ExportSnapshot tool package incorrectly documented
    * [HBASE-10580] - IntegrationTestingUtility#restoreCluster leak resource when running in a mini cluster mode
    * [HBASE-10581] - ACL znode are left without PBed during upgrading hbase0.94* to hbase0.96+
    * [HBASE-10582] - 0.94->0.96 Upgrade: ACL can't be repopulated when ACL table contains row for table '-ROOT' or '.META.'
    * [HBASE-10585] - Avoid early creation of Node objects in LRUDictionary.BidirectionalLRUMap
    * [HBASE-10586] - hadoop2-compat IPC metric registred twice
    * [HBASE-10587] - Master metrics clusterRequests is wrong
    * [HBASE-10593] - FileInputStream in JenkinsHash#main() is never closed
    * [HBASE-10594] - Speed up TestRestoreSnapshotFromClient
    * [HBASE-10598] - Written data can not be read out because MemStore#timeRangeTracker might be updated concurrently
    * [HBASE-10600] - HTable#batch() should perform validation on empty Put
    * [HBASE-10604] - Fix parseArgs javadoc
    * [HBASE-10606] - Bad timeout in RpcRetryingCaller#callWithRetries w/o parameters
    * [HBASE-10608] - Acquire the FS Delegation Token for Secure ExportSnapshot
    * [HBASE-10611] - Description for hbase:acl table is wrong on master-status#catalogTables
    * [HBASE-10614] - Master could not be stopped
    * [HBASE-10618] - User should not be allowed to disable/drop visibility labels table
    * [HBASE-10621] - Unable to grant user permission to namespace
    * [HBASE-10622] - Improve log and Exceptions in Export Snapshot
    * [HBASE-10624] - Fix 2 new findbugs warnings introduced by HBASE-10598
    * [HBASE-10627] - A logic mistake in HRegionServer isHealthy
    * [HBASE-10631] - Avoid extra seek on FileLink open
    * [HBASE-10632] - Region lost in limbo after ArrayIndexOutOfBoundsException during assignment
    * [HBASE-10637] - rpcClient: Setup the iostreams when writing
    * [HBASE-10639] - Unload script displays wrong counts (off by one) when unloading regions
    * [HBASE-10644] - TestSecureExportSnapshot#testExportFileSystemState fails on hadoop-1
    * [HBASE-10656] -  high-scale-lib's Counter depends on Oracle (Sun) JRE, and also has some bug
    * [HBASE-10660] - MR over snapshots can OOM when alternative blockcache is enabled
    * [HBASE-10662] - RegionScanner is never closed if the region has been moved-out or re-opened when performing scan request
    * [HBASE-10665] - TestCompaction and TestCompactionWithCoprocessor run too long
    * [HBASE-10666] - TestMasterCoprocessorExceptionWithAbort hangs at shutdown
    * [HBASE-10668] - TestExportSnapshot runs too long
    * [HBASE-10669] - [hbck tool] Usage is wrong for hbck tool for -sidelineCorruptHfiles option
    * [HBASE-10675] - IntegrationTestIngestWithACL should allow User to be passed as Parameter
    * [HBASE-10677] - boundaries check in hbck throwing IllegalArgumentException
    * [HBASE-10679] - Both clients get wrong scan results if the first scanner expires and the second scanner is created with the same scannerId on the same region
    * [HBASE-10682] - region_mover.rb throws "can't convert nil into String" for regions moved
    * [HBASE-10685] - [WINDOWS] TestKeyStoreKeyProvider fails on windows
    * [HBASE-10686] - [WINDOWS] TestStripeStoreFileManager fails on windows
    * [HBASE-10687] - Fix description about HBaseLocalFileSpanReceiver in reference manual
    * [HBASE-10692] - The Multi TableMap job don't support the security HBase cluster
    * [HBASE-10694] - TableSkewCostFunction#cost() casts integral division result to double
    * [HBASE-10705] - CompactionRequest#toString() may throw NullPointerException
    * [HBASE-10706] - Disable writeToWal in tests where possible
    * [HBASE-10714] - SyncFuture hangs when sequence is 0
    * [HBASE-10715] - TimeRange has a poorly formatted error message
    * [HBASE-10716] - [Configuration]: hbase.regionserver.region.split.policy should be part of hbase-default.xml
    * [HBASE-10718] - TestHLogSplit fails when it sets a KV size to be negative
    * [HBASE-10720] - rpcClient: Wrong log level when closing the connection
    * [HBASE-10726] - Fix java.lang.ArrayIndexOutOfBoundsException in StochasticLoadBalancer$LocalityBasedCandidateGenerator
    * [HBASE-10731] - Fix environment variables typos in scripts
    * [HBASE-10735] - [WINDOWS] Set -XX:MaxPermSize for unit tests
    * [HBASE-10736] - Fix Javadoc warnings introduced in HBASE-10169
    * [HBASE-10737] - HConnectionImplementation should stop RpcClient on close
    * [HBASE-10738] - AssignmentManager should shut down executors on stop
    * [HBASE-10739] - RS web UI NPE if master shuts down sooner
    * [HBASE-10745] - Access ShutdownHook#fsShutdownHooks should be synchronized
    * [HBASE-10749] - CellComparator.compareStatic() compares type wrongly
    * [HBASE-10751] - TestHRegion testWritesWhileScanning occasional fail since HBASE-10514 went in
    * [HBASE-10755] - MetricsRegionSourceImpl creates metrics that start with a lower case
    * [HBASE-10760] - Wrong methods' names in ClusterLoadState class
    * [HBASE-10762] - clone_snapshot doesn't check for missing namespace
    * [HBASE-10766] - SnapshotCleaner allows to delete referenced files
    * [HBASE-10770] - Don't exit from the Canary daemon mode if no regions are present
    * [HBASE-10792] - RingBufferTruck does not release its payload
    * [HBASE-10793] - AuthFailed as a valid zookeeper state
    * [HBASE-10799] - [WINDOWS] TestImportTSVWithVisibilityLabels.testBulkOutputWithTsvImporterTextMapper  fails on windows
    * [HBASE-10802] - CellComparator.compareStaticIgnoreMvccVersion compares type wrongly
    * [HBASE-10804] - Add a validations step to ExportSnapshot
    * [HBASE-10805] - Speed up KeyValueHeap.next() a bit
    * [HBASE-10806] - Two protos missing in hbase-protocol/pom.xml
    * [HBASE-10809] - HBaseAdmin#deleteTable fails when META region happen to move around same time
    * [HBASE-10814] - RpcClient: some calls can get stuck when connection is closing
    * [HBASE-10825] - Add copy-from option to ExportSnapshot
    * [HBASE-10829] - Flush is skipped after log replay if the last recovered edits file is skipped
    * [HBASE-10830] - Integration test MR jobs attempt to load htrace jars from the wrong location
    * [HBASE-10831] - IntegrationTestIngestWithACL is not setting up LoadTestTool correctly
    * [HBASE-10833] - Region assignment may fail during cluster start up
    * [HBASE-10838] - Insufficient AccessController covering permission check
    * [HBASE-10839] - NullPointerException in construction of RegionServer in Security Cluster
    * [HBASE-10840] - Fix findbug warn induced by HBASE-10569
    * [HBASE-10845] - Memstore snapshot size isn't updated in DefaultMemStore#rollback()
    * [HBASE-10846] - Links between active and backup masters are broken
    * [HBASE-10848] - Filter SingleColumnValueFilter combined with NullComparator does not work
    * [HBASE-10849] - Fix increased javadoc warns
    * [HBASE-10850] - essential column family optimization is broken
    * [HBASE-10851] - Wait for regionservers to join the cluster
    * [HBASE-10853] - NPE in RSRpcServices.get on trunk
    * [HBASE-10854] - [VisibilityController] Apply MAX_VERSIONS from schema or request when scanning
    * [HBASE-10860] - Insufficient AccessController covering permission check
    * [HBASE-10862] - Update config field names in hbase-default.xml description for hbase.hregion.memstore.block.multiplier
    * [HBASE-10863] - Scan doesn't return rows for user who has authorization by visibility label in secure deployment
    * [HBASE-10864] - Spelling nit
    * [HBASE-10890] - ExportSnapshot needs to add acquired token to job
    * [HBASE-10895] - unassign a region fails due to the hosting region server is in FailedServerList
    * [HBASE-10897] - On master start, deadlock if refresh UI
    * [HBASE-10899] - [AccessController] Apply MAX_VERSIONS from schema or request when scanning
    * [HBASE-10903] - HBASE-10740 regression; cannot pass commands for zk to run
    * [HBASE-10917] - Fix hbase book "Tests" page
    * [HBASE-10922] - Log splitting status should always be closed
    * [HBASE-10931] - Enhance logs
    * [HBASE-10941] - default for max version isn't updated in doc after change on 0.96
    * [HBASE-10948] - Fix hbase table file 'x' mode
    * [HBASE-10949] - Reversed scan could hang
    * [HBASE-10954] - Fix TestCloseRegionHandler.testFailedFlushAborts
    * [HBASE-10955] - HBCK leaves the region in masters in-memory RegionStates if region hdfs dir is lost
    * [HBASE-10958] - [dataloss] Bulk loading with seqids can prevent some log entries from being replayed
    * [HBASE-10964] - Delete mutation is not consistent with Put wrt timestamp
    * [HBASE-10966] - RowCounter misinterprets column names that have colons in their qualifier
    * [HBASE-10967] - CatalogTracker.waitForMeta should not wait indefinitely silently
    * [HBASE-10968] - Null check in TableSnapshotInputFormat#TableSnapshotRegionRecordReader#initialize() is redundant
    * [HBASE-10970] - [AccessController] Issues with covering cell permission checks
    * [HBASE-10976] - Start CatalogTracker after cluster ID is available
    * [HBASE-10979] - Fix AnnotationReadingPriorityFunction "scan" handling
    * [HBASE-10995] - Fix resource leak related to unclosed HBaseAdmin
    * [HBASE-11005] - Remove dead code in HalfStoreFileReader#getScanner#seekBefore()
    * [HBASE-11009] - We sync every hbase:meta table write twice
    * [HBASE-11011] - Avoid extra getFileStatus() calls on Region startup
    * [HBASE-11012] - InputStream is not properly closed in two methods of JarFinder
    * [HBASE-11018] - ZKUtil.getChildDataAndWatchForNewChildren() will not return null as indicated
    * [HBASE-11028] - FSLog: Avoid an extra sync if the current transaction is already sync'd
    * [HBASE-11030] - HBaseTestingUtility.getMiniHBaseCluster should be able to return null
    * [HBASE-11036] - Online schema change with region merge may cause data loss
    * [HBASE-11038] - Filtered scans can bypass metrics collection
    * [HBASE-11049] - HBase WALPlayer needs to add credentials to job to play to table
    * [HBASE-11052] - Sending random data crashes thrift service
    * [HBASE-11055] - Extends the sampling size
    * [HBASE-11064] - Odd behaviors of TableName for empty namespace
    * [HBASE-11081] - Trunk Master won't start; looking for Constructor that takes conf only
    * [HBASE-11082] - Potential unclosed TraceScope in FSHLog#replaceWriter()
    * [HBASE-11096] - stop method of Master and RegionServer coprocessor  is not invoked
    * [HBASE-11112] - PerformanceEvaluation should document --multiGet option on its printUsage.
    * [HBASE-11117] - [AccessController] checkAndPut/Delete hook should check only Read permission
    * [HBASE-11118] - non environment variable solution for "IllegalAccessError: class com.google.protobuf.ZeroCopyLiteralByteString cannot access its superclass com.google.protobuf.LiteralByteString"
    * [HBASE-11120] - Update documentation about major compaction algorithm
    * [HBASE-11133] - Add an option to skip snapshot verification after Export
    * [HBASE-11139] - BoundedPriorityBlockingQueue#poll() should check the return value from awaitNanos()
    * [HBASE-11143] - Improve replication metrics
    * [HBASE-11149] - Wire encryption is broken
    * [HBASE-11150] - Images in website are broken
    * [HBASE-11155] - Fix Validation Errors in Ref Guide
    * [HBASE-11162] - RegionServer webui uses the default master info port irrespective of the user configuration.
    * [HBASE-11168] - [docs] Remove references to RowLocks in post 0.96 docs.
    * [HBASE-11169] - nit: fix incorrect javadoc in OrderedBytes about BlobVar and BlobCopy
    * [HBASE-11176] - Make /src/main/xslt/configuration_to_docbook_section.xsl produce better Docbook
    * [HBASE-11177] - 'hbase.rest.filter.classes' exists in hbase-default.xml twice
    * [HBASE-11185] - Parallelize Snapshot operations
    * [HBASE-11186] - Improve TestExportSnapshot verifications
    * [HBASE-11189] - Subprocedure should be marked as complete upon failure
    * [HBASE-11190] - Fix easy typos in documentation
    * [HBASE-11194] - [AccessController] issue with covering permission check in case of concurrent op on same row
    * [HBASE-11196] - Update description of -ROOT- in ref guide
    * [HBASE-11202] - Cleanup on HRegion class
    * [HBASE-11212] - Fix increment index in KeyValueSortReducer
    * [HBASE-11215] - Deprecate void setAutoFlush(boolean autoFlush, boolean clearBufferOnFail)
    * [HBASE-11217] - Race between SplitLogManager task creation + TimeoutMonitor
    * [HBASE-11218] - Data loss in HBase standalone mode
    * [HBASE-11226] - Document and increase the default value for hbase.hstore.flusher.count
    * [HBASE-11234] - FastDiffDeltaEncoder#getFirstKeyInBlock returns wrong result
    * [HBASE-11237] - Bulk load initiated by user other than hbase fails
    * [HBASE-11238] - Add info about SlabCache and BucketCache to Ref Guide
    * [HBASE-11239] - Forgot to svn add test that was part of HBASE-11171, TestCacheConfig
    * [HBASE-11248] - KeyOnlyKeyValue#toString() passes wrong offset to keyToString()
    * [HBASE-11251] - LoadTestTool should grant READ permission for the users that are given READ access for specific cells
    * [HBASE-11252] - Fixing new javadoc warnings in master branch
    * [HBASE-11253] - IntegrationTestWithCellVisibilityLoadAndVerify failing since HBASE-10326
    * [HBASE-11255] - Negative request num in region load
    * [HBASE-11260] - hbase-default.xml refers to hbase.regionserver.global.memstore.upperLimit which is deprecated
    * [HBASE-11267] - Dynamic metrics2 metrics may consume large amount of heap memory
    * [HBASE-11268] - HTablePool is now a deprecated class, should update docs to reflect this
    * [HBASE-11273] - Fix jersey and slf4j deps
    * [HBASE-11275] - [AccessController] postCreateTable hook fails when another CP creates table on their startup
    * [HBASE-11277] - RPCServer threads can wedge under high load
    * [HBASE-11279] - Block cache could be disabled by mistake
    * [HBASE-11285] - Expand coprocs info in Ref Guide
    * [HBASE-11297] - Remove some synchros in the rpcServer responder
    * [HBASE-11298] - Simplification in RpcServer code
    * [HBASE-11302] - ReplicationSourceManager#sources is not thread safe
    * [HBASE-11310] - Delete's copy constructor should copy the attributes also
    * [HBASE-11311] - Secure Bulk Load does not execute chmod 777 on the files
    * [HBASE-11312] - Minor refactoring of TestVisibilityLabels class
    * [HBASE-11320] - Reenable bucket cache logging
    * [HBASE-11324] - Update 2.5.2.8. Managed Compactions
    * [HBASE-11327] - ExportSnapshot hit stackoverflow error when target snapshotDir doesn't contain uri
    * [HBASE-11329] - Minor fixup of new blockcache tab number formatting
    * [HBASE-11335] - Fix the TABLE_DIR param in TableSnapshotInputFormat
    * [HBASE-11337] - Document how to create, modify, delete a table using Java
    * [HBASE-11338] - Expand documentation on bloom filters
    * [HBASE-11340] - Remove references to xcievers in documentation
    * [HBASE-11341] - ZKProcedureCoordinatorRpcs should respond only to members
    * [HBASE-11342] - The method isChildReadLock in class ZKInterProcessLockBase is wrong
    * [HBASE-11347] - For some errors, the client can retry infinitely
    * [HBASE-11353] - Wrong Write Request Count
    * [HBASE-11363] - Access checks in preCompact and preCompactSelection are out of sync
    * [HBASE-11371] - Typo in Thrift2 docs
    * [HBASE-11373] - hbase-protocol compile failed for name conflict of RegionTransition
    * [HBASE-11374] - RpcRetryingCaller#callWithoutRetries has a timeout of zero
    * [HBASE-11378] - TableMapReduceUtil overwrites user supplied options for multiple tables/scaners job
    * [HBASE-11380] - HRegion lock object is not being released properly, leading to snapshot failure
    * [HBASE-11382] - Adding unit test for HBASE-10964 (Delete mutation is not consistent with Put wrt timestamp)
    * [HBASE-11387] - metrics: wrong totalRequestCount
    * [HBASE-11391] - Thrift table creation will fail with default TTL with sanity checks
    * [HBASE-11396] - Invalid meta entries can lead to unstartable master
    * [HBASE-11397] - When merging expired stripes, we need to create an empty file to preserve metadata.
    * [HBASE-11399] - Improve Quickstart chapter and move Pseudo-distributed and distributed to it
    * [HBASE-11403] - Fix race conditions around Object#notify
    * [HBASE-11413] - [findbugs] RV: Negating the result of compareTo()/compare()
    * [HBASE-11418] - build target "site" doesn't respect hadoop-two.version property
    * [HBASE-11422] - Specification of scope is missing for certain Hadoop dependencies
    * [HBASE-11423] - Visibility label and per cell ACL feature not working with HTable#mutateRow() and MultiRowMutationEndpoint
    * [HBASE-11424] - Avoid usage of CellUtil#getTagArray(Cell cell) within server
    * [HBASE-11430] - lastFlushSeqId has been updated wrongly during region open
    * [HBASE-11432] - [AccessController] Remove cell first strategy
    * [HBASE-11433] - LruBlockCache does not respect its configurable parameters
    * [HBASE-11435] - Visibility labelled cells fail to getting replicated
    * [HBASE-11439] - StripeCompaction may not obey the OffPeak rule to compaction
    * [HBASE-11442] - ReplicationSourceManager doesn't cleanup the queues for recovered sources
    * [HBASE-11445] - TestZKProcedure#testMultiCohortWithMemberTimeoutDuringPrepare is flaky
    * [HBASE-11448] - Fix javadoc warnings
    * [HBASE-11449] - IntegrationTestIngestWithACL fails to use different users after HBASE-10810
    * [HBASE-11457] - Increment HFile block encoding IVs accounting for ciper's internal use
    * [HBASE-11458] - NPEs if RegionServer cannot initialize
    * [HBASE-11460] - Deadlock in HMaster on masterAndZKLock in HConnectionManager
    * [HBASE-11463] - (findbugs) HE: Class defines equals() and uses Object.hashCode()
    * [HBASE-11465] - [VisibilityController] Reserved tags check not happening for Append/Increment
    * [HBASE-11475] - Distributed log replay should also replay compaction events
    * [HBASE-11476] - Expand 'Conceptual View' section of Data Model chapter
    * [HBASE-11477] - book.xml has Docbook validity issues (again)
    * [HBASE-11481] - TableSnapshotInputFormat javadoc wrongly claims HBase "enforces security"
    * [HBASE-11487] - ScanResponse carries non-zero cellblock for CloseScanRequest (ScanRequest with close_scanner = true)
    * [HBASE-11488] - cancelTasks in SubprocedurePool can hang during task error
    * [HBASE-11489] - ClassNotFoundException while running IT tests in trunk using 'mvn verify'
    * [HBASE-11492] - Hadoop configuration overrides some ipc parameters including tcpNoDelay
    * [HBASE-11493] - Autorestart option is not working because of stale znode  "shutdown"
    * [HBASE-11496] - HBASE-9745 broke cygwin CLASSPATH translation
    * [HBASE-11502] - Track down broken images in Ref Guide
    * [HBASE-11505] - 'snapshot' shell command shadows 'snapshot' shell when 'help' is invoked
    * [HBASE-11506] - IntegrationTestWithCellVisibilityLoadAndVerify allow User to be passed as arg
    * [HBASE-11509] - Forward port HBASE-11039 to trunk and branch-1 after HBASE-11489
    * [HBASE-11510] - Visibility serialization format tag gets duplicated in Append/Increment'ed cells
    * [HBASE-11514] - Fix findbugs warnings in blockcache
    * [HBASE-11517] - TestReplicaWithCluster turns zombie
    * [HBASE-11518] - doc update for how to create non-shared HConnection
    * [HBASE-11523] - JSON serialization of PE Options is broke
    * [HBASE-11525] - Region server holding in region states is out of sync with meta
    * [HBASE-11527] - Cluster free memory limit check should consider L2 block cache size also when L2 cache is onheap.
    * [HBASE-11530] - RegionStates adds regions to wrong servers
    * [HBASE-11531] - RegionStates for regions under region-in-transition znode are not updated on startup
    * [HBASE-11534] - Remove broken JAVA_HOME autodetection in hbase-config.sh
    * [HBASE-11535] - ReplicationPeer map is not thread safe
    * [HBASE-11536] - Puts of region location to Meta may be out of order which causes inconsistent of region location
    * [HBASE-11537] - Avoid synchronization on instances of ConcurrentMap
    * [HBASE-11540] - Document HBASE-11474
    * [HBASE-11541] - Wrong result when scaning meta with startRow
    * [HBASE-11545] - mapred.TableSnapshotInputFormat is missing InterfaceAudience annotation
    * [HBASE-11550] - Custom value for BUCKET_CACHE_BUCKETS_KEY should be sorted
    * [HBASE-11551] - BucketCache$WriterThread.run() doesn't handle exceptions correctly
    * [HBASE-11554] - Remove Reusable poolmap Rpc client type.
    * [HBASE-11555] - TableSnapshotRegionSplit should be public
    * [HBASE-11558] - Caching set on Scan object gets lost when using TableMapReduceUtil in 0.95+
    * [HBASE-11561] - deprecate ImmutableBytesWritable.getSize and replace with getLength
    * [HBASE-11564] - Improve cancellation management in the rpc layer
    * [HBASE-11565] - Stale connection could stay for a while
    * [HBASE-11575] - Pseudo distributed mode does not work as documented
    * [HBASE-11579] - CopyTable should check endtime value only if != 0
    * [HBASE-11582] - Fix Javadoc warning in DataInputInputStream and CacheConfig
    * [HBASE-11586] - HFile's HDFS op latency sampling code is not used
    * [HBASE-11588] - RegionServerMetricsWrapperRunnable misused the 'period' parameter
    * [HBASE-11589] - AccessControlException should be a not retriable exception
    * [HBASE-11591] - Scanner fails to retrieve KV  from bulk loaded file with highest sequence id than the cell's mvcc in a non-bulk loaded file
    * [HBASE-11593] - TestCacheConfig failing consistently in precommit builds
    * [HBASE-11594] - Unhandled NoNodeException in distributed log replay mode
    * [HBASE-11603] - Apply version of HADOOP-8027 to our JMXJsonServlet
    * [HBASE-11609] - LoadIncrementalHFiles fails if the namespace is specified
    * [HBASE-11617] - incorrect AgeOfLastAppliedOp and AgeOfLastShippedOp in replication Metrics when no new replication OP
    * [HBASE-11620] - Record the class name of Writer in WAL header so that only proper Reader can open the WAL file
    * [HBASE-11627] - RegionSplitter's rollingSplit terminated with "/ by zero", and the _balancedSplit file was not deleted properly
    * [HBASE-11632] - Region split needs to clear force split flag at the end of SplitRequest run
    * [HBASE-11659] - Region state RPC call is not idempotent
    * [HBASE-11662] - Launching shell with long-form --debug fails
    * [HBASE-11668] - Re-add HBASE_LIBRARY_PATH to bin/hbase
    * [HBASE-11671] - TestEndToEndSplitTransaction fails on master
    * [HBASE-11678] - BucketCache ramCache fills heap after running a few hours
    * [HBASE-11687] - No need to abort on postOpenDeployTasks exception if region opening is cancelled
    * [HBASE-11703] - Meta region state could be corrupted
    * [HBASE-11705] - callQueueSize should be decremented in a fail-fast scenario
    * [HBASE-11708] - RegionSplitter incorrectly calculates splitcount
    * [HBASE-11709] - TestMasterShutdown can fail sometime
    * [HBASE-11716] - LoadTestDataGeneratorWithVisibilityLabels should handle Delete mutations
    * [HBASE-11717] - Remove unused config 'hbase.offheapcache.percentage' from hbase-default.xml and book
    * [HBASE-11718] - Remove some logs in RpcClient.java
    * [HBASE-11719] - Remove some unused paths in AsyncClient
    * [HBASE-11725] - Backport failover checking change to 1.0
    * [HBASE-11726] - Master should fail-safe if starting with a pre 0.96 layout
    * [HBASE-11727] - Assignment wait time error in case of ServerNotRunningYetException
    * [HBASE-11728] - Data loss while scanning using PREFIX_TREE DATA-BLOCK-ENCODING
    * [HBASE-11733] - Avoid copy-paste in Master/Region CoprocessorHost
    * [HBASE-11744] - RpcServer code should not use a collection from netty internal
    * [HBASE-11745] - FilterAllFilter should return ReturnCode.SKIP
    * [HBASE-11755] - VisibilityController returns the wrong value for preBalanceSwitch()
    * [HBASE-11766] - Backdoor CoprocessorHConnection is no longer being used for local writes
    * [HBASE-11770] - TestBlockCacheReporting.testBucketCache is not stable
    * [HBASE-11772] - Bulk load mvcc and seqId issues with native hfiles
    * [HBASE-11773] - Wrong field used for protobuf construction in RegionStates.
    * [HBASE-11782] - Document that hbase.MetaMigrationConvertingToPB needs to be set to true for migrations pre 0.96
    * [HBASE-11787] - TestRegionLocations is not categorized
    * [HBASE-11788] - hbase is not deleting the cell when a Put with a KeyValue, KeyValue.Type.Delete is submitted
    * [HBASE-11789] - LoadIncrementalHFiles is not picking up the -D option
    * [HBASE-11794] - StripeStoreFlusher causes NullPointerException
    * [HBASE-11797] - Create Table interface to replace HTableInterface
    * [HBASE-11802] - Scan copy constructor doesn't copy reversed member variable
    * [HBASE-11813] - CellScanner#advance may overflow stack
    * [HBASE-11814] - TestAssignmentManager.testCloseFailed() and testOpenCloseRacing() is flaky
    * [HBASE-11816] - Initializing custom Metrics implementation failed in Mapper or Reducer
    * [HBASE-11820] - ReplicationSource : Set replication codec class as RPC codec class on a clonned Configuration
    * [HBASE-11823] - Cleanup javadoc warnings.
    * [HBASE-11832] - maven release plugin overrides command line arguments
    * [HBASE-11836] - IntegrationTestTimeBoundedMultiGetRequestsWithRegionReplicas tests simple get by default
    * [HBASE-11839] - TestRegionRebalance is flakey
    * [HBASE-11844] - region_mover.rb load enters an infinite loop if region already present on target server
    * [HBASE-11851] - RpcClient can try to close a connection not ready to close
    * [HBASE-11856] - hbase-common needs a log4j.properties resource for handling unit test logging output
    * [HBASE-11857] - Restore ReaderBase.initAfterCompression() and WALCellCodec.create(Configuration, CompressionContext)
    * [HBASE-11859] - 'hadoop jar' references in documentation should mention hbase-server.jar, not hbase.jar
    * [HBASE-11863] - WAL files are not archived and stays in the WAL directory after splitting
    * [HBASE-11876] - RegionScanner.nextRaw(...) should not update metrics
    * [HBASE-11878] - TestVisibilityLabelsWithDistributedLogReplay#testAddVisibilityLabelsOnRSRestart sometimes fails due to VisibilityController not yet initialized
    * [HBASE-11880] - NPE in MasterStatusServlet
    * [HBASE-11882] - Row level consistency may not be maintained with bulk load and compaction
    * [HBASE-11886] - The creator of the table should have all permissions on the table
    * [HBASE-11887] - Memory retention in branch-1; millions of instances of LiteralByteString for column qualifier and value
    * [HBASE-11892] - configs contain stale entries
    * [HBASE-11893] - RowTooBigException should be in hbase-client module
    * [HBASE-11896] - LoadIncrementalHFiles fails in secure mode if the namespace is specified
    * [HBASE-11898] - CoprocessorHost.Environment should cache class loader instance
    * [HBASE-11905] - Add orca to server UIs and update logo.
    * [HBASE-11921] - Minor fixups that come of testing branch-1
    * [HBASE-11932] - Stop the html-single from building a html-single of every chapter and cluttering the docbkx directory
    * [HBASE-11936] - IsolationLevel must be attribute of a Query not a Scan
    * [HBASE-11946] - Get xref and API docs to build properly again
    * [HBASE-11947] - NoSuchElementException in balancer for master regions
    * [HBASE-11949] - Setting hfile.block.cache.size=0 doesn't actually disable blockcache
    * [HBASE-11959] - TestAssignmentManagerOnCluster is flaky
    * [HBASE-11972] - The "doAs user" used in the update to hbase:acl table RPC is incorrect
    * [HBASE-11976] - Server startcode is not checked for bulk region assignment
    * [HBASE-11984] - TestClassFinder failing on occasion
    * [HBASE-11989] - IntegrationTestLoadAndVerify cannot be configured anymore on distributed mode

** Improvement
    * [HBASE-2217] - VM OPTS for shell only
    * [HBASE-3270] - When we create the .version file, we should create it in a tmp location and then move it into place
    * [HBASE-4163] - Create Split Strategy for YCSB Benchmark
    * [HBASE-4495] - CatalogTracker has an identity crisis; needs to be cut-back in scope
    * [HBASE-5349] - Automagically tweak global memstore and block cache sizes based on workload
    * [HBASE-5923] - Cleanup checkAndXXX logic
    * [HBASE-6626] - Add a chapter on HDFS in the troubleshooting section of the HBase reference guide.
    * [HBASE-6990] - Pretty print TTL
    * [HBASE-7088] - Duplicate code in RowCounter
    * [HBASE-7849] - Provide administrative limits around bulkloads of files into a single region
    * [HBASE-7910] - Dont use reflection for security
    * [HBASE-7987] - Snapshot Manifest file instead of multiple empty files
    * [HBASE-8076] - add better doc for HBaseAdmin#offline API.
    * [HBASE-8298] - In shell, provide alias of 'desc' for 'describe'
    * [HBASE-8315] - Documentation should have more information of LRU Stats
    * [HBASE-8332] - Add truncate as HMaster method
    * [HBASE-8495] - Change ownership of the directory to bulk load
    * [HBASE-8604] - improve reporting of incorrect peer address in replication
    * [HBASE-8755] - A new write thread model for HLog to improve the overall HBase write throughput
    * [HBASE-8763] - Combine MVCC and SeqId
    * [HBASE-8807] - HBase MapReduce Job-Launch Documentation Misplaced
    * [HBASE-8970] - [book] Filter language documentation is hidden
    * [HBASE-9343] - Implement stateless scanner for Stargate
    * [HBASE-9345] - Add support for specifying filters in scan
    * [HBASE-9426] - Make custom distributed barrier procedure pluggable
    * [HBASE-9501] - Provide throttling for replication
    * [HBASE-9524] - Multi row get does not return any results even if any one of the rows specified in the query is missing and improve exception handling
    * [HBASE-9542] - Have Get and MultiGet do cellblocks, currently they are pb all the time
    * [HBASE-9829] - make the compaction logging less confusing
    * [HBASE-9857] - Blockcache prefetch option
    * [HBASE-9866] - Support the mode where REST server authorizes proxy users
    * [HBASE-9892] - Add info port to ServerName to support multi instances in a node
    * [HBASE-9999] - Add support for small reverse scan
    * [HBASE-10010] - eliminate the put latency spike on the new log file beginning
    * [HBASE-10048] - Add hlog number metric in regionserver
    * [HBASE-10074] - consolidate and improve capacity/sizing documentation
    * [HBASE-10086] - [book] document the  HBase canary tool usage in the HBase Book
    * [HBASE-10116] - SlabCache metrics improvements
    * [HBASE-10128] - Improve the copy table doc to include information about versions
    * [HBASE-10141] - instead of putting expired store files thru compaction, just archive them
    * [HBASE-10157] - Provide CP hook post log replay
    * [HBASE-10164] - Allow heapsize of different units to be passed as HBASE_HEAPSIZE
    * [HBASE-10173] - Need HFile version check in security coprocessors
    * [HBASE-10175] - 2-thread ChaosMonkey steps on its own toes
    * [HBASE-10202] - Documentation is lacking information about rolling-restart.sh script.
    * [HBASE-10211] - Improve AccessControl documentation in hbase book
    * [HBASE-10213] - Add read log size per second metrics for replication source
    * [HBASE-10228] - Support setCellVisibility and setAuthorizations in Shell
    * [HBASE-10229] - Support OperationAttributes in Increment and Append in Shell
    * [HBASE-10239] - Improve determinism and debugability of TestAccessController
    * [HBASE-10252] - Don't write back to WAL/memstore when Increment amount is zero (mostly for query rather than update intention)
    * [HBASE-10263] - make LruBlockCache single/multi/in-memory ratio user-configurable and provide preemptive mode for in-memory type block
    * [HBASE-10265] - Upgrade to commons-logging 1.1.3
    * [HBASE-10277] - refactor AsyncProcess
    * [HBASE-10289] - Avoid random port usage by default JMX Server. Create Custome JMX server
    * [HBASE-10323] - Auto detect data block encoding in HFileOutputFormat
    * [HBASE-10324] - refactor deferred-log-flush/Durability related interface/code/naming to align with changed semantic of the new write thread model
    * [HBASE-10331] - Insure security tests use SecureTestUtil methods for grants
    * [HBASE-10344] - Improve write performance by ignoring sync to hdfs when an asyncer's writes have been synced by other asyncer
    * [HBASE-10346] - Add Documentation for stateless scanner
    * [HBASE-10368] - Add Mutation.setWriteToWAL() back to 0.98
    * [HBASE-10373] - Add more details info for ACL group in HBase book
    * [HBASE-10389] - Add namespace help info in table related shell commands
    * [HBASE-10395] - endTime won't be set in VerifyReplication if startTime is not set
    * [HBASE-10419] - Add multiget support to PerformanceEvaluation
    * [HBASE-10423] - Report back the message of split or rollback failure to the master
    * [HBASE-10427] - clean up HRegionLocation/ServerName usage
    * [HBASE-10430] - Support compressTags in shell for enabling tag encoding
    * [HBASE-10471] - Remove HTD.isAsyncLogFlush() from trunk
    * [HBASE-10479] - HConnection interface is public but is used internally, and contains a bunch of methods
    * [HBASE-10487] - Avoid allocating new KeyValue and according bytes-copying for appended kvs which don't have existing values
    * [HBASE-10498] - Add new APIs to load balancer interface
    * [HBASE-10511] - Add latency percentiles on PerformanceEvaluation
    * [HBASE-10518] - DirectMemoryUtils.getDirectMemoryUsage spams when none is configured
    * [HBASE-10569] - Co-locate meta and master
    * [HBASE-10570] - Allow overrides of Surefire secondPartForkMode and testFailureIgnore
    * [HBASE-10589] - Reduce unnecessary TestRowProcessorEndpoint resource usage
    * [HBASE-10590] - Update contents about tracing in the Reference Guide
    * [HBASE-10591] - Sanity check table configuration in createTable
    * [HBASE-10592] - Refactor PerformanceEvaluation tool
    * [HBASE-10597] - IOEngine#read() should return the number of bytes transferred
    * [HBASE-10599] - Replace System.currentMillis() with EnvironmentEdge.currentTimeMillis in memstore flusher and related places
    * [HBASE-10603] - Deprecate RegionSplitter CLI tool
    * [HBASE-10615] - Make LoadIncrementalHFiles skip reference files
    * [HBASE-10638] - Improve error message when there is no region server available for move
    * [HBASE-10641] - Configurable Bucket Sizes in bucketCache
    * [HBASE-10663] - Some code cleanup of class Leases and ScannerListener.leaseExpired
    * [HBASE-10678] - Make verifyrep tool implement toolrunner
    * [HBASE-10690] - Drop Hadoop-1 support
    * [HBASE-10693] - Correct declarations of Atomic* fields from 'volatile' to 'final'
    * [HBASE-10744] - AM#CloseRegion no need to retry on FailedServerException
    * [HBASE-10746] - Bump the version of HTrace to 3.0
    * [HBASE-10752] - Port HBASE-10270 'Remove DataBlockEncoding from BlockCacheKey' to trunk
    * [HBASE-10769] - hbase/bin/hbase-cleanup.sh has wrong usage string
    * [HBASE-10771] - Primitive type put/get APIs in ByteRange
    * [HBASE-10785] - Metas own location should be cached
    * [HBASE-10788] - Add 99th percentile of latency in PE
    * [HBASE-10797] - Add support for -h and --help to rolling_restart.sh and fix the usage string output
    * [HBASE-10813] - Possible over-catch of exceptions
    * [HBASE-10823] - Resolve LATEST_TIMESTAMP to current server time before scanning for ACLs
    * [HBASE-10835] - DBE encode path improvements
    * [HBASE-10842] - Some loggers not declared static final
    * [HBASE-10861] - Extend ByteRange to create Mutable and Immutable ByteRange
    * [HBASE-10871] - Indefinite OPEN/CLOSE wait on busy RegionServers
    * [HBASE-10873] - Control number of regions assigned to backup masters
    * [HBASE-10883] - Restrict the universe of labels and authorizations
    * [HBASE-10884] - [REST] Do not disable block caching when scanning
    * [HBASE-10885] - Support visibility expressions on Deletes
    * [HBASE-10887] - tidy ThriftUtilities format
    * [HBASE-10892] - [Shell] Add support for globs in user_permission
    * [HBASE-10902] - Make Secure Bulk Load work across remote secure clusters
    * [HBASE-10911] - ServerShutdownHandler#toString shows meaningless message
    * [HBASE-10916] - [VisibilityController] Stackable ScanLabelGenerators
    * [HBASE-10923] - Control where to put meta region
    * [HBASE-10925] - Do not OOME, throw RowTooBigException instead
    * [HBASE-10926] - Use global procedure to flush table memstore cache
    * [HBASE-10934] - Provide Admin interface to abstract HBaseAdmin
    * [HBASE-10950] - Add  a configuration point for MaxVersion of Column Family
    * [HBASE-10951] - Use PBKDF2 to generate test encryption keys in the shell
    * [HBASE-10952] - [REST] Let the user turn off block caching if desired
    * [HBASE-10960] - Enhance HBase Thrift 1 to include "append" and "checkAndPut" operations
    * [HBASE-10984] - Add description about setting up htrace-zipkin to documentation
    * [HBASE-11000] - Add autoflush option to PerformanceEvaluation
    * [HBASE-11001] - Shell support for granting cell permissions for testing
    * [HBASE-11002] - Shell support for changing cell visibility for testing
    * [HBASE-11004] - Extend traces through FSHLog#sync
    * [HBASE-11007] - BLOCKCACHE in schema descriptor seems not aptly named
    * [HBASE-11008] - Align bulk load, flush, and compact to require Action.CREATE
    * [HBASE-11026] - Provide option to filter out all rows in PerformanceEvaluation tool
    * [HBASE-11044] - [Shell] Show groups for user in 'whoami' output
    * [HBASE-11047] - Remove TimeoutMontior
    * [HBASE-11048] - Support setting custom priority per client RPC
    * [HBASE-11068] - Update code to use Admin factory method instead of constructor
    * [HBASE-11074] - Have PE emit histogram stats as it runs rather than dump once at end of test
    * [HBASE-11083] - ExportSnapshot should provide capability to limit bandwidth consumption
    * [HBASE-11086] - Add htrace support for PerfEval
    * [HBASE-11119] - Update ExportSnapShot to optionally not use a tmp file on external file system
    * [HBASE-11123] - Upgrade instructions from 0.94 to 0.98
    * [HBASE-11126] - Add RegionObserver pre hooks that operate under row lock
    * [HBASE-11128] - Add -target option to ExportSnapshot to export with a different name
    * [HBASE-11134] - Add a -list-snapshots option to SnapshotInfo
    * [HBASE-11136] - Add permission check to roll WAL writer
    * [HBASE-11137] - Add mapred.TableSnapshotInputFormat
    * [HBASE-11151] - move tracing modules from hbase-server to hbase-common
    * [HBASE-11167] - Avoid usage of java.rmi package Exception in MemStore
    * [HBASE-11201] - Enable global procedure members to return values to procedure master
    * [HBASE-11211] - LoadTestTool option for specifying number of regions per server
    * [HBASE-11219] - HRegionServer#createRegionLoad() should reuse RegionLoad.Builder instance when called in a loop
    * [HBASE-11220] - Add listeners to ServerManager and AssignmentManager
    * [HBASE-11240] - Print hdfs pipeline when hlog's sync is slow
    * [HBASE-11259] - Compression.java different compressions load system classpath differently causing errors
    * [HBASE-11304] - Enable HBaseAdmin.execProcedure to return data from procedure execution
    * [HBASE-11305] - Remove bunch of unused imports in HConnectionManager
    * [HBASE-11315] - Keeping MVCC for configurable longer time
    * [HBASE-11319] - No need to use favored node mapping initialization to find all regions
    * [HBASE-11326] - Use an InputFormat for ExportSnapshot
    * [HBASE-11331] - [blockcache] lazy block decompression
    * [HBASE-11344] - Hide row keys and such from the web UIs
    * [HBASE-11348] - Make frequency and sleep times of  chaos monkeys configurable
    * [HBASE-11349] - [Thrift] support authentication/impersonation
    * [HBASE-11350] - [PE] Allow random value size
    * [HBASE-11355] - a couple of callQueue related improvements
    * [HBASE-11362] - Minor improvements to LoadTestTool and PerformanceEvaluation
    * [HBASE-11370] - SSH doesn't need to scan meta if not using ZK for assignment
    * [HBASE-11376] - Presplit table in IntegrationTestBigLinkedList's Generator tool
    * [HBASE-11390] - PerformanceEvaluation: add an option to use a single connection
    * [HBASE-11398] - Print the stripes' state with file size info
    * [HBASE-11407] - hbase-client should not require Jackson for pure HBase queries be executed
    * [HBASE-11415] - [PE] Dump config before running test
    * [HBASE-11421] - HTableInterface javadoc correction
    * [HBASE-11434] - [AccessController] Disallow inbound cells with reserved tags
    * [HBASE-11436] - Support start Row and stop Row in HBase Export
    * [HBASE-11437] - Modify cell tag handling code to treat the length as unsigned
    * [HBASE-11438] - [Visibility Controller] Support UTF8 character as Visibility Labels
    * [HBASE-11440] - Make KeyValueCodecWithTags as the default codec for replication in trunk
    * [HBASE-11444] - Remove use of reflection for User#getShortName
    * [HBASE-11446] - Reduce the frequency of RNG calls in SecureWALCellCodec#EncryptedKvEncoder
    * [HBASE-11450] - Improve file size info in SnapshotInfo tool
    * [HBASE-11452] - add getUserPermission feature in AccessControlClient as client API
    * [HBASE-11473] - Add BaseWALObserver class
    * [HBASE-11474] - [Thrift2] support authentication/impersonation
    * [HBASE-11491] - Add an option to sleep randomly during the tests with the PE tool
    * [HBASE-11497] - Expose RpcScheduling implementations as LimitedPrivate interfaces
    * [HBASE-11513] - Combine SingleMultiple Queue RpcExecutor into a single class
    * [HBASE-11516] - Track time spent in executing coprocessors in each region.
    * [HBASE-11553] - Abstract visibility label related services into an interface
    * [HBASE-11566] - make ExportSnapshot extendable by removing 'final'
    * [HBASE-11583] - Refactoring out the configuration changes for enabling VisibilityLabels in the unit tests.
    * [HBASE-11623] - mutateRowsWithLocks might require updatesLock.readLock with waitTime=0
    * [HBASE-11630] - Refactor TestAdmin to use Admin interface instead of HBaseAdmin
    * [HBASE-11631] - Wait a little till server is online in assigning meta
    * [HBASE-11649] - Add shortcut commands to bin/hbase for test tools
    * [HBASE-11650] - Write hbase.id to a temporary location and move into place
    * [HBASE-11657] - Put HTable region methods in an interface
    * [HBASE-11664] - Build broken - TestVisibilityWithCheckAuths
    * [HBASE-11667] - Comment ClientScanner logic for NSREs.
    * [HBASE-11674] - LoadIncrementalHFiles should be more verbose after unrecoverable error
    * [HBASE-11679] - Replace "HTable" with "HTableInterface" where backwards-compatible
    * [HBASE-11696] - Make CombinedBlockCache resizable.
    * [HBASE-11697] - Improve the 'Too many blocks' message on UI blockcache status page
    * [HBASE-11701] - Start and end of memstore flush log should be on the same level
    * [HBASE-11702] - Better introspection of long running compactions
    * [HBASE-11706] - Set versions for VerifyReplication
    * [HBASE-11731] - Add option to only run a subset of the shell tests
    * [HBASE-11748] - Cleanup and add pool usage tracing to Compression
    * [HBASE-11749] - Better error logging when coprocessors loading has failed.
    * [HBASE-11754] - [Shell] Record table property SPLITS_FILE in descriptor
    * [HBASE-11757] - Provide a common base abstract class for both RegionObserver and MasterObserver
    * [HBASE-11774] - Avoid allocating unnecessary tag iterators
    * [HBASE-11777] - Find a way to set sequenceId on Cells on the server
    * [HBASE-11790] - Bulk load should use HFileOutputFormat2 in all cases
    * [HBASE-11805] - KeyValue to Cell Convert in WALEdit APIs
    * [HBASE-11810] - Access SSL Passwords through Credential Provider API
    * [HBASE-11821] - [ImportTSV] Abstract labels tags creation into pluggable Interface
    * [HBASE-11825] - Create Connection and ConnectionManager
    * [HBASE-11826] - Split each tableOrRegionName admin methods into two targetted methods
    * [HBASE-11828] - callers of SeverName.valueOf should use equals and not ==
    * [HBASE-11845] - HFile tool should implement Tool, disable blockcache by default
    * [HBASE-11846] - HStore#assertBulkLoadHFileOk should log if a full HFile verification will be performed during a bulkload
    * [HBASE-11847] - HFile tool should be able to print block headers
    * [HBASE-11865] - Result implements CellScannable; rather it should BE a CellScanner
    * [HBASE-11873] - Hbase Version CLI enhancement
    * [HBASE-11877] - Make TableSplit more readable
    * [HBASE-11891] - Introduce HBaseInterfaceAudience level to denote class names that appear in configs.
    * [HBASE-11897] - Add append and remove peer table-cfs cmds for replication

** New Feature
    * [HBASE-4089] - blockCache contents report
    * [HBASE-6104] - Require EXEC permission to call coprocessor endpoints
    * [HBASE-7667] - Support stripe compaction
    * [HBASE-7840] - Enhance the java it framework to start & stop a distributed hbase & hadoop cluster
    * [HBASE-8751] - Enable peer cluster to choose/change the ColumnFamilies/Tables it really want to replicate from a source cluster
    * [HBASE-9047] - Tool to handle finishing replication when the cluster is offline
    * [HBASE-10119] - Allow HBase coprocessors to clean up when they fail
    * [HBASE-10151] - No-op HeapMemoryTuner
    * [HBASE-10416] - Improvements to the import flow
    * [HBASE-10881] - Support reverse scan in thrift2
    * [HBASE-10935] - support snapshot policy where flush memstore can be skipped to prevent production cluster freeze
    * [HBASE-11724] - Add to RWQueueRpcExecutor the ability to split get and scan handlers
    * [HBASE-11885] - Provide a Dockerfile to easily build and run HBase from source
    * [HBASE-11909] - Region count listed by HMaster UI and hbck are different

** Task
    * [HBASE-4456] - [doc] Add a section about RS failover
    * [HBASE-4920] - We need a mascot, a totem
    * [HBASE-5697] - Audit HBase for usage of deprecated hadoop 0.20.x property names.
    * [HBASE-6139] - Add troubleshooting section for CentOS 6.2 page allocation failure issue
    * [HBASE-6192] - Document ACL matrix in the book
    * [HBASE-7394] - Document security config requirements from HBASE-7357
    * [HBASE-8035] - Add site target check to precommit tests
    * [HBASE-8844] - Document the removal of replication state AKA start/stop_replication
    * [HBASE-9580] - Document the meaning of @InterfaceAudience in hbase ref guide
    * [HBASE-9733] - Book should have individual Disqus comment per page
    * [HBASE-9875] - NamespaceJanitor chore is not used
    * [HBASE-10134] - Fix findbug warning in VisibilityController
    * [HBASE-10159] - Replaced deprecated interface Closeable
    * [HBASE-10206] - Explain tags in the hbase book
    * [HBASE-10246] - Wrap long lines in recently added source files
    * [HBASE-10364] - Allow configuration option for parent znode in LoadTestTool
    * [HBASE-10388] - Add export control notice in README
    * [HBASE-10439] - Document how to configure REST server impersonation
    * [HBASE-10473] - Add utility for adorning http Context
    * [HBASE-10601] - Upgrade hadoop dependency to 2.3.0 release
    * [HBASE-10609] - Remove filterKeyValue(Cell ignored) from FilterBase
    * [HBASE-10612] - Remove unnecessary dependency on org.eclipse.jdt:core
    * [HBASE-10670] - HBaseFsck#connect() should use new connection
    * [HBASE-10700] - IntegrationTestWithCellVisibilityLoadAndVerify should allow current user to be the admin
    * [HBASE-10740] - Upgrade zookeeper to 3.4.6 release
    * [HBASE-10786] - If snapshot verification fails with 'Regions moved', the message should contain the name of region causing the failure
    * [HBASE-10787] - TestHCM#testConnection* take too long
    * [HBASE-10821] - Make ColumnInterpreter#getValue() abstract
    * [HBASE-10824] - Enhance detection of protobuf generated code in line length check
    * [HBASE-10889] - test-patch.sh should exclude thrift generated code from long line detection
    * [HBASE-10906] - Change error log for NamingException in TableInputFormatBase to WARN level
    * [HBASE-10912] - setUp / tearDown in TestSCVFWithMiniCluster should be done once per run
    * [HBASE-10956] - Upgrade hadoop-2 dependency to 2.4.0
    * [HBASE-11016] - Remove Filter#filterRow(List)
    * [HBASE-11032] - Replace deprecated methods in FileSystem with their replacements
    * [HBASE-11050] - Replace empty catch block in TestHLog#testFailedToCreateHLogIfParentRenamed with @Test(expected=)
    * [HBASE-11076] - Update refguide on getting 0.94.x to run on hadoop 2.2.0+
    * [HBASE-11090] - Backport HBASE-11083 ExportSnapshot should provide capability to limit bandwidth consumption
    * [HBASE-11107] - Provide utility method equivalent to 0.92's Result.getBytes().getSize()
    * [HBASE-11154] - Document how to use Reverse Scan API
    * [HBASE-11199] - One-time effort to pretty-print the Docbook XML, to make further patch review easier
    * [HBASE-11203] - Clean up javadoc and findbugs warnings in trunk
    * [HBASE-11204] - Document bandwidth consumption limit feature for ExportSnapshot
    * [HBASE-11227] - Mention 8- and 16-bit fixed-with encodings in OrderedBytes docstring
    * [HBASE-11230] - Remove getRowOrBefore from HTableInterface and HTable
    * [HBASE-11317] - Expand unit testing to cover Mockito and MRUnit and give more examples
    * [HBASE-11364] - [BlockCache] Add a flag to cache data blocks in L1 if multi-tier cache
    * [HBASE-11600] - DataInputputStream and DoubleOutputStream are no longer being used
    * [HBASE-11604] - Disable co-locating meta/master by default
    * [HBASE-11621] - Make MiniDFSCluster run faster
    * [HBASE-11666] - Enforce JDK7 javac for builds on branch-1 and master
    * [HBASE-11682] - Explain hotspotting
    * [HBASE-11723] - Document all options of bin/hbase command
    * [HBASE-11735] - Document Configurable Bucket Sizes in bucketCache
    * [HBASE-11762] - Record the class name of Codec in WAL header
    * [HBASE-11800] - Coprocessor service methods in HTableInterface should be annotated public
    * [HBASE-11849] - Clean up orphaned private audience classes
    * [HBASE-11858] - Audit regionserver classes that are missing InterfaceAudience

** Test
    * [HBASE-8889] - TestIOFencing#testFencingAroundCompaction occasionally fails
    * [HBASE-9928] - TestHRegion should clean up test-data directory upon completion
    * [HBASE-9953] - PerformanceEvaluation: Decouple data size from client concurrency
    * [HBASE-10044] - test-patch.sh should accept documents by known file extensions
    * [HBASE-10130] - TestSplitLogManager#testTaskResigned fails sometimes
    * [HBASE-10180] - TestByteBufferIOEngine#testByteBufferIOEngine occasionally fails
    * [HBASE-10189] - Intermittent TestReplicationSyncUpTool failure
    * [HBASE-10301] - TestAssignmentManagerOnCluster#testOpenCloseRacing fails intermittently
    * [HBASE-10377] - Add test for HBASE-10370 Compaction in out-of-date Store causes region split failure
    * [HBASE-10394] - Test for Replication with tags
    * [HBASE-10406] - Column family option is not effective in IntegrationTestSendTraceRequests
    * [HBASE-10408] - Intermittent TestDistributedLogSplitting#testLogReplayForDisablingTable failure
    * [HBASE-10440] - integration tests fail due to nonce collisions
    * [HBASE-10465] - TestZKPermissionsWatcher.testPermissionsWatcher fails sometimes
    * [HBASE-10475] - TestRegionServerCoprocessorExceptionWithAbort may timeout due to concurrent lease removal
    * [HBASE-10480] - TestLogRollPeriod#testWithEdits may fail due to insufficient waiting
    * [HBASE-10543] - Two rare test failures with TestLogsCleaner and TestSplitLogWorker
    * [HBASE-10635] - thrift#TestThriftServer fails due to TTL validity check
    * [HBASE-10649] - TestMasterMetrics fails occasionally
    * [HBASE-10764] - TestLoadIncrementalHFilesSplitRecovery#testBulkLoadPhaseFailure takes too long
    * [HBASE-10767] - Load balancer may interfere with tests in TestHBaseFsck
    * [HBASE-10774] - Restore TestMultiTableInputFormat
    * [HBASE-10782] - Hadoop2 MR tests fail occasionally because of mapreduce.jobhistory.address is no set in job conf
    * [HBASE-10828] - TestRegionObserverInterface#testHBase3583 should wait for all regions to be assigned
    * [HBASE-10852] - TestDistributedLogSplitting#testDisallowWritesInRecovering occasionally fails
    * [HBASE-10867] - TestRegionPlacement#testRegionPlacement occasionally fails
    * [HBASE-10868] - TestAtomicOperation should close HRegion instance after each subtest
    * [HBASE-10988] - Properly wait for server in TestThriftServerCmdLine
    * [HBASE-11010] - TestChangingEncoding is unnecessarily slow
    * [HBASE-11019] - incCount() method should be properly stubbed in HConnectionTestingUtility#getMockedConnectionAndDecorate()
    * [HBASE-11037] - Race condition in TestZKBasedOpenCloseRegion
    * [HBASE-11051] - checkJavacWarnings in test-patch.sh should bail out early if there is compilation error
    * [HBASE-11057] - Improve TestShell coverage of grant and revoke comamnds
    * [HBASE-11104] - IntegrationTestImportTsv#testRunFromOutputCommitter misses credential initialization
    * [HBASE-11152] - test-patch.sh should be able to handle the case where $TERM is not defined
    * [HBASE-11166] - Categorize tests in hbase-prefix-tree module
    * [HBASE-11328] - testMoveRegion could fail
    * [HBASE-11345] - Add an option not to restore cluster after an IT test
    * [HBASE-11375] - Validate compile-protobuf profile in test-patch.sh
    * [HBASE-11404] - TestLogLevel should stop the server at the end
    * [HBASE-11443] - TestIOFencing#testFencingAroundCompactionAfterWALSync times out
    * [HBASE-11615] - TestZKLessAMOnCluster.testForceAssignWhileClosing failed on Jenkins
    * [HBASE-11713] - Adding hbase shell unit test coverage for visibility labels.
    * [HBASE-11918] - TestVisibilityLabelsWithDistributedLogReplay#testAddVisibilityLabelsOnRSRestart sometimes fails due to VisibilityController initialization not being recognized
    * [HBASE-11942] - Fix TestHRegionBusyWait
    * [HBASE-11966] - Minor error in TestHRegion.testCheckAndMutate_WithCorrectValue()

** Umbrella
    * [HBASE-7319] - Extend Cell usage through read path
    * [HBASE-9945] - Coprocessor loading and execution improvements
    * [HBASE-10909] - Abstract out ZooKeeper usage in HBase - phase 1