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stack commented on HBASE-12751: ------------------------------- All this fails: 2015-09-11 13:08:01.896 Vim[4556:17136812] Can't allocate a new block for a pasteboard. Creation of a new Pasteboard will fail. kalashnikov:hbase.git stack$ python dev-support/findHangingTests.py https://builds.apache.org/job/PreCommit-HBASE-Build/15564//consoleText Fetching the console output from the URL Printing hanging tests Hanging test : org.apache.hadoop.hbase.replication.TestMasterReplication Hanging test : org.apache.hadoop.hbase.regionserver.TestServerCustomProtocol Hanging test : org.apache.hadoop.hbase.master.handler.TestCreateTableHandler Hanging test : org.apache.hadoop.hbase.TestIOFencing Hanging test : org.apache.hadoop.hbase.replication.regionserver.TestRegionReplicaReplicationEndpoint Hanging test : org.apache.hadoop.hbase.snapshot.TestFlushSnapshotFromClient Hanging test : org.apache.hadoop.hbase.master.TestDistributedLogSplitting Hanging test : org.apache.hadoop.hbase.io.hfile.TestHFileBlock Hanging test : org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer Hanging test : org.apache.hadoop.hbase.master.procedure.TestMasterFailoverWithProcedures Hanging test : org.apache.hadoop.hbase.io.hfile.TestScannerSelectionUsingTTL Hanging test : org.apache.hadoop.hbase.master.procedure.TestServerCrashProcedure Hanging test : org.apache.hadoop.hbase.master.TestAssignmentManagerOnCluster Hanging test : org.apache.hadoop.hbase.master.snapshot.TestSnapshotFileCache Hanging test : org.apache.hadoop.hbase.master.TestMasterFailover Hanging test : org.apache.hadoop.hbase.regionserver.TestMultiColumnScanner Hanging test : org.apache.hadoop.hbase.regionserver.TestRegionReplicaFailover Hanging test : org.apache.hadoop.hbase.replication.regionserver.TestReplicationWALReaderManager Hanging test : org.apache.hadoop.hbase.master.balancer.TestStochasticLoadBalancer2 Hanging test : org.apache.hadoop.hbase.io.hfile.TestCacheOnWrite Hanging test : org.apache.hadoop.hbase.regionserver.compactions.TestCompactionWithThroughputController Hanging test : org.apache.hadoop.hbase.master.TestMasterShutdown Hanging test : org.apache.hadoop.hbase.security.visibility.TestVisibilityLabelsWithDistributedLogReplay Hanging test : org.apache.hadoop.hbase.snapshot.TestExportSnapshot Hanging test : org.apache.hadoop.hbase.regionserver.TestRegionReplicas Printing Failing tests Failing test : org.apache.hadoop.hbase.client.TestFastFail Failing test : org.apache.hadoop.hbase.master.procedure.TestWALProcedureStoreOnHDFS > Allow RowLock to be reader writer > --------------------------------- > > Key: HBASE-12751 > URL: https://issues.apache.org/jira/browse/HBASE-12751 > Project: HBase > Issue Type: Bug > Components: regionserver > Affects Versions: 2.0.0, 1.3.0 > Reporter: Elliott Clark > Assignee: Elliott Clark > Fix For: 2.0.0, 1.3.0 > > Attachments: 12751.rebased.v25.txt, 12751.rebased.v26.txt, > 12751.rebased.v26.txt, 12751.rebased.v27.txt, 12751.rebased.v29.txt, > 12751.rebased.v31.txt, 12751.rebased.v32.txt, 12751.rebased.v32.txt, > 12751.rebased.v33.txt, 12751.rebased.v34.txt, 12751.rebased.v35.txt, > 12751.rebased.v35.txt, 12751v22.txt, 12751v23.txt, 12751v23.txt, > 12751v23.txt, 12751v23.txt, HBASE-12751-v1.patch, HBASE-12751-v10.patch, > HBASE-12751-v10.patch, HBASE-12751-v11.patch, HBASE-12751-v12.patch, > HBASE-12751-v13.patch, HBASE-12751-v14.patch, HBASE-12751-v15.patch, > HBASE-12751-v16.patch, HBASE-12751-v17.patch, HBASE-12751-v18.patch, > HBASE-12751-v19 (1).patch, HBASE-12751-v19.patch, HBASE-12751-v2.patch, > HBASE-12751-v20.patch, HBASE-12751-v20.patch, HBASE-12751-v21.patch, > HBASE-12751-v3.patch, HBASE-12751-v4.patch, HBASE-12751-v5.patch, > HBASE-12751-v6.patch, HBASE-12751-v7.patch, HBASE-12751-v8.patch, > HBASE-12751-v9.patch, HBASE-12751.patch > > > Right now every write operation grabs a row lock. This is to prevent values > from changing during a read modify write operation (increment or check and > put). However it limits parallelism in several different scenarios. > If there are several puts to the same row but different columns or stores > then this is very limiting. > If there are puts to the same column then mvcc number should ensure a > consistent ordering. So locking is not needed. > However locking for check and put or increment is still needed. -- This message was sent by Atlassian JIRA (v6.3.4#6332)