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stack commented on HBASE-12751: ------------------------------- Has these as hanging: kalashnikov:hbase.git stack$ python ./dev-support/findHangingTests.py https://builds.apache.org/job/PreCommit-HBASE-Build/15664//consoleText Fetching the console output from the URL Printing hanging tests Hanging test : org.apache.hadoop.hbase.client.TestMobCloneSnapshotFromClient Hanging test : org.apache.hadoop.hbase.client.TestReplicasClient Hanging test : org.apache.hadoop.hbase.regionserver.TestHRegion Hanging test : org.apache.hadoop.hbase.namespace.TestNamespaceAuditor Hanging test : org.apache.hadoop.hbase.TestAcidGuarantees Hanging test : org.apache.hadoop.hbase.TestZooKeeper Printing Failing tests Trying all tests locally and they pass. Looking at failures up in jenkins..... For TestZooKeeper... it is an interesting one... seems unrelated though: {code} 2015-09-22 08:54:42,962 INFO [RS:0;asf906:46174] regionserver.HRegionServer(1099): stopping server asf906.gq1.ygridcore.net,46174,1442912078095; zookeeper connection closed. 2015-09-22 08:54:42,962 INFO [RS:0;asf906:46174] regionserver.HRegionServer(1102): RS:0;asf906:46174 exiting 2015-09-22 08:54:42,962 ERROR [SyncThread:0] server.NIOServerCnxn(178): Unexpected Exception: java.nio.channels.CancelledKeyException at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:73) at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:77) at org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:151) at org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1081) at org.apache.zookeeper.server.NIOServerCnxn.process(NIOServerCnxn.java:1118) at org.apache.zookeeper.server.WatchManager.triggerWatch(WatchManager.java:120) at org.apache.zookeeper.server.WatchManager.triggerWatch(WatchManager.java:92) at org.apache.zookeeper.server.DataTree.deleteNode(DataTree.java:591) at org.apache.zookeeper.server.DataTree.processTxn(DataTree.java:802) at org.apache.zookeeper.server.ZKDatabase.processTxn(ZKDatabase.java:329) at org.apache.zookeeper.server.ZooKeeperServer.processTxn(ZooKeeperServer.java:994) at org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:116) at org.apache.zookeeper.server.SyncRequestProcessor.flush(SyncRequestProcessor.java:200) at org.apache.zookeeper.server.SyncRequestProcessor.run(SyncRequestProcessor.java:131) {code} I went through all the others and nothing untoward. Let me retry. > 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, 12751.rebased.v35.txt, 12751.v37.txt, 12751.v38.txt, > 12751.v39.txt, 12751.v40.txt, 12751v22.txt, 12751v23.txt, 12751v23.txt, > 12751v23.txt, 12751v23.txt, 12751v36.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)