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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9467) write can be totally blocked temporarily by a write-heavy region
Date Mon, 16 Sep 2013 19:32:53 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13768664#comment-13768664
] 

Hadoop QA commented on HBASE-9467:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12603381/HBASE-9467-trunk-v1.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified
tests.

    {color:green}+1 hadoop1.0{color}.  The patch compiles against the hadoop 1.0 profile.

    {color:green}+1 hadoop2.0{color}.  The patch compiles against the hadoop 2.0 profile.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn site goal succeeds with this patch.

     {color:red}-1 core tests{color}.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.coprocessor.TestMasterObserver
                  org.apache.hadoop.hbase.coprocessor.TestAggregateProtocol
                  org.apache.hadoop.hbase.mapreduce.TestTimeRangeMapRed
                  org.apache.hadoop.hbase.mapreduce.TestRowCounter
                  org.apache.hadoop.hbase.io.encoding.TestChangingEncoding
                  org.apache.hadoop.hbase.client.TestHTableUtil
                  org.apache.hadoop.hbase.mapreduce.TestImportTsv
                  org.apache.hadoop.hbase.coprocessor.TestOpenTableInCoprocessor
                  org.apache.hadoop.hbase.coprocessor.TestClassLoading
                  org.apache.hadoop.hbase.thrift.TestThriftServer
                  org.apache.hadoop.hbase.master.cleaner.TestSnapshotFromMaster
                  org.apache.hadoop.hbase.trace.TestHTraceHooks
                  org.apache.hadoop.hbase.mapreduce.TestCopyTable
                  org.apache.hadoop.hbase.mapreduce.TestImportExport
                  org.apache.hadoop.hbase.client.TestHTablePool$TestHTableThreadLocalPool
                  org.apache.hadoop.hbase.util.TestMergeTool
                  org.apache.hadoop.hbase.mapreduce.TestSecureLoadIncrementalHFiles
                  org.apache.hadoop.hbase.security.access.TestTablePermissions
                  org.apache.hadoop.hbase.snapshot.TestExportSnapshot
                  org.apache.hadoop.hbase.TestZooKeeper
                  org.apache.hadoop.hbase.coprocessor.TestRegionServerCoprocessorExceptionWithRemove
                  org.apache.hadoop.hbase.client.TestCloneSnapshotFromClient
                  org.apache.hadoop.hbase.client.TestClientTimeouts
                  org.apache.hadoop.hbase.client.TestSnapshotCloneIndependence
                  org.apache.hadoop.hbase.master.TestMasterFailoverBalancerPersistence
                  org.apache.hadoop.hbase.mapreduce.TestTableInputFormatScan2
                  org.apache.hadoop.hbase.client.TestFromClientSideNoCodec
                  org.apache.hadoop.hbase.util.hbck.TestOfflineMetaRebuildOverlap
                  org.apache.hadoop.hbase.client.TestMultiParallel
                  org.apache.hadoop.hbase.util.hbck.TestOfflineMetaRebuildBase
                  org.apache.hadoop.hbase.security.access.TestAccessControlFilter
                  org.apache.hadoop.hbase.coprocessor.TestRegionServerCoprocessorExceptionWithAbort
                  org.apache.hadoop.hbase.thrift.TestThriftServerCmdLine
                  org.apache.hadoop.hbase.regionserver.TestHRegion
                  org.apache.hadoop.hbase.client.TestTimestampsFilter
                  org.apache.hadoop.hbase.util.TestRegionSplitter
                  org.apache.hadoop.hbase.catalog.TestMetaMigrationConvertingToPB
                  org.apache.hadoop.hbase.client.TestMetaScanner
                  org.apache.hadoop.hbase.master.snapshot.TestSnapshotFileCache
                  org.apache.hadoop.hbase.coprocessor.TestRegionObserverBypass
                  org.apache.hadoop.hbase.client.TestAdmin
                  org.apache.hadoop.hbase.client.TestMultipleTimestamps
                  org.apache.hadoop.hbase.master.TestAssignmentManagerOnCluster
                  org.apache.hadoop.hbase.master.handler.TestCreateTableHandler
                  org.apache.hadoop.hbase.master.TestMasterMetricsWrapper
                  org.apache.hadoop.hbase.master.TestMasterRestartAfterDisablingTable
                  org.apache.hadoop.hbase.TestAcidGuarantees
                  org.apache.hadoop.hbase.master.TestRollingRestart
                  org.apache.hadoop.hbase.regionserver.TestHRegionOnCluster
                  org.apache.hadoop.hbase.TestFullLogReconstruction
                  org.apache.hadoop.hbase.coprocessor.TestRegionObserverScannerOpenHook
                  org.apache.hadoop.hbase.client.TestRestoreSnapshotFromClient
                  org.apache.hadoop.hbase.coprocessor.TestBigDecimalColumnInterpreter
                  org.apache.hadoop.hbase.mapreduce.TestTableMapReduce
                  org.apache.hadoop.hbase.mapreduce.TestWALPlayer
                  org.apache.hadoop.hbase.client.TestScannersFromClientSide
                  org.apache.hadoop.hbase.coprocessor.TestMasterCoprocessorExceptionWithRemove
                  org.apache.hadoop.hbase.mapreduce.TestCellCounter
                  org.apache.hadoop.hbase.TestIOFencing
                  org.apache.hadoop.hbase.mapreduce.TestHLogRecordReader
                  org.apache.hadoop.hbase.master.TestMasterTransitions
                  org.apache.hadoop.hbase.client.TestScannerTimeout
                  org.apache.hadoop.hbase.client.TestClientScannerRPCTimeout
                  org.apache.hadoop.hbase.util.TestMergeTable
                  org.apache.hadoop.hbase.regionserver.TestServerCustomProtocol
                  org.apache.hadoop.hbase.client.TestShell
                  org.apache.hadoop.hbase.master.TestRestartCluster
                  org.apache.hadoop.hbase.mapreduce.TestMultithreadedTableMapper
                  org.apache.hadoop.hbase.mapreduce.TestSecureLoadIncrementalHFilesSplitRecovery
                  org.apache.hadoop.hbase.coprocessor.TestMasterCoprocessorExceptionWithAbort
                  org.apache.hadoop.hbase.util.TestMiniClusterLoadParallel
                  org.apache.hadoop.hbase.client.TestSnapshotMetadata
                  org.apache.hadoop.hbase.client.TestHTablePool$TestHTableReusablePool
                  org.apache.hadoop.hbase.TestDrainingServer
                  org.apache.hadoop.hbase.util.TestMiniClusterLoadSequential
                  org.apache.hadoop.hbase.master.TestMasterFileSystem
                  org.apache.hadoop.hbase.master.TestZKBasedOpenCloseRegion
                  org.apache.hadoop.hbase.zookeeper.TestZooKeeperACL
                  org.apache.hadoop.hbase.util.TestCoprocessorScanPolicy
                  org.apache.hadoop.hbase.master.TestOpenedRegionHandler
                  org.apache.hadoop.hbase.io.TestFileLink
                  org.apache.hadoop.hbase.master.TestMasterMetrics
                  org.apache.hadoop.hbase.client.TestHTableMultiplexer
                  org.apache.hadoop.hbase.mapreduce.TestLoadIncrementalHFiles
                  org.apache.hadoop.hbase.master.TestMasterFailover
                  org.apache.hadoop.hbase.mapreduce.TestLoadIncrementalHFilesSplitRecovery
                  org.apache.hadoop.hbase.backup.TestHFileArchiving
                  org.apache.hadoop.hbase.master.TestTableLockManager
                  org.apache.hadoop.hbase.master.handler.TestTableDescriptorModification
                  org.apache.hadoop.hbase.coprocessor.TestRowProcessorEndpoint
                  org.apache.hadoop.hbase.mapreduce.TestHRegionPartitioner
                  org.apache.hadoop.hbase.client.TestHCM
                  org.apache.hadoop.hbase.master.TestMasterShutdown
                  org.apache.hadoop.hbase.client.TestSnapshotFromClient
                  org.apache.hadoop.hbase.coprocessor.TestWALObserver
                  org.apache.hadoop.hbase.snapshot.TestFlushSnapshotFromClient
                  org.apache.hadoop.hbase.client.TestFromClientSide
                  org.apache.hadoop.hbase.util.TestMiniClusterLoadEncoded
                  org.apache.hadoop.hbase.master.TestRegionPlacement
                  org.apache.hadoop.hbase.client.TestFromClientSide3
                  org.apache.hadoop.hbase.client.TestFromClientSideWithCoprocessor
                  org.apache.hadoop.hbase.mapreduce.TestTableInputFormatScan1
                  org.apache.hadoop.hbase.security.access.TestAccessController
                  org.apache.hadoop.hbase.TestLocalHBaseCluster
                  org.apache.hadoop.hbase.catalog.TestMetaReaderEditor
                  org.apache.hadoop.hbase.snapshot.TestRestoreFlushSnapshotFromClient
                  org.apache.hadoop.hbase.coprocessor.TestCoprocessorEndpoint
                  org.apache.hadoop.hbase.master.TestDistributedLogSplitting
                  org.apache.hadoop.hbase.util.TestFSUtils
                  org.apache.hadoop.hbase.util.hbck.TestOfflineMetaRebuildHole
                  org.apache.hadoop.hbase.mapreduce.TestHFileOutputFormat
                  org.apache.hadoop.hbase.coprocessor.TestRegionObserverInterface
                  org.apache.hadoop.hbase.regionserver.TestSplitTransactionOnCluster
                  org.apache.hadoop.hbase.master.cleaner.TestHFileCleaner
                  org.apache.hadoop.hbase.master.TestMaster
                  org.apache.hadoop.hbase.io.encoding.TestLoadAndSwitchEncodeOnDisk
                  org.apache.hadoop.hbase.regionserver.wal.TestLogRolling
                  org.apache.hadoop.hbase.util.TestHBaseFsck
                  org.apache.hadoop.hbase.regionserver.TestClusterId

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/7244//console

This message is automatically generated.
                
> write can be totally blocked temporarily by a write-heavy region
> ----------------------------------------------------------------
>
>                 Key: HBASE-9467
>                 URL: https://issues.apache.org/jira/browse/HBASE-9467
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Feng Honghua
>            Assignee: Feng Honghua
>         Attachments: HBASE-9467-trunk-v0.patch, HBASE-9467-trunk-v1.patch, HBASE-9467-trunk-v1.patch
>
>
> Write to a region can be blocked temporarily if the memstore of that region reaches the
threshold(hbase.hregion.memstore.block.multiplier * hbase.hregion.flush.size) until the memstore
of that region is flushed.
> For a write-heavy region, if its write requests saturates all the handler threads of
that RS when write blocking for that region occurs, requests of other regions/tables to that
RS also can't be served due to no available handler threads...until the pending writes of
that write-heavy region are served after the flush is done. Hence during this time period,
from the RS perspective it can't serve any request from any table/region just due to a single
write-heavy region.
> This sounds not very reasonable, right? Maybe write requests from a region can only be
served by a sub-set of the handler threads, and then write blocking of any single region can't
lead to the scenario mentioned above?
> Comment?

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