Issues incorporated and incompatible changes called out on the jira.
* Cleaned up references to HLog
* Deprecates HLogKey but maintains it for compatibility
- Moves all Writeable from WALKey to HLogKey
* Adds utility code to CoprocessorHost to help with evolving Coprocessor APIs
* RSRpcServices roll WAL call now requests the non-meta LogRoller roll all logs
- rolls actually happen asynchronously
- deprecated old api (and noted incompatible behavior change)
- modified api in new Admin interface to reflect lack of return values.
* Moved WAL user facing API to "WAL"
- only 1 sync offered
- WALTrailer removed from API
* make provider used by the WALFactory configurable.
* Move all WAL requests to use opaque ids instead of paths
* WALProvider provides API details for implementers and handles creation of WALs.
* Refactor WALActionsListener to have a basic implementation.
* turn MetricsWAL into a WALActionsListener.
* tests that needs FSHLog implementation details use them directly, others just reference provider + factory
- Some tests moved from Large to Medium based on run time.
* pull out wal disabling into its own no-op class
* update region open to delegate to WALFactory
* update performance test tool to allow for multiple regions
* Removed references to meta-specific wals within wal code
- replaced with generic suffixes
- WALFactory maintains a dedicated WALProvider for meta (and so knows about the distinction)
* maintain backwards compat on HLogPrettyPrinter and mark it deprecated.
- made WALPrettyPrinter IA.Private in favor of `bin/hbase wal`
* move WALUtil stuff that's implementation specific to said implementation
- WALUtil now acts as an integration point between the RegionServer and hte WAL code.
Incorporates contributions from v.himanshu and stack.
Conflicts:
hbase-server/src/main/java/org/apache/hadoop/hbase/mapreduce/WALPlayer.java
hbase-server/src/main/java/org/apache/hadoop/hbase/master/AssignmentManager.java
hbase-server/src/main/java/org/apache/hadoop/hbase/migration/NamespaceUpgrade.java
hbase-server/src/main/java/org/apache/hadoop/hbase/protobuf/ReplicationProtbufUtil.java
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/LogRoller.java
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RegionServerServices.java
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/FSHLog.java
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/RegionReplicaReplicationEndpoint.java
hbase-server/src/main/java/org/apache/hadoop/hbase/util/HMerge.java
hbase-server/src/main/java/org/apache/hadoop/hbase/util/MetaUtils.java
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALSplitter.java
hbase-server/src/test/java/org/apache/hadoop/hbase/TestIOFencing.java
hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAdmin2.java
hbase-server/src/test/java/org/apache/hadoop/hbase/coprocessor/TestRegionObserverScannerOpenHook.java
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestFilter.java
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestInvocationRecordFilter.java
hbase-server/src/test/java/org/apache/hadoop/hbase/fs/TestBlockReorder.java
hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestHLogRecordReader.java
hbase-server/src/test/java/org/apache/hadoop/hbase/mapreduce/TestImportExport.java
hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestDistributedLogSplitting.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestAtomicOperation.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestRegionMergeTransaction.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestSplitTransaction.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestHLog.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollAbort.java
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRollingNoCluster.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestMultiSlaveReplication.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationEndpoint.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationSource.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationWALEntryFilters.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestRegionReplicaReplicationEndpoint.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestRegionReplicaReplicationEndpointNoMaster.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationWALReaderManager.java
hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestFSVisitor.java
hbase-server/src/test/java/org/apache/hadoop/hbase/util/TestMergeTool.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestSecureWAL.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALFiltering.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALMethods.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALReaderOnSecureWAL.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplit.java
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWALSplitCompressed.java
src/main/docbkx/ops_mgt.xml
