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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9321) Contention getting the current user in RpcClient$Connection.writeRequest
Date Wed, 28 Aug 2013 23:17:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9321?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13753010#comment-13753010
] 

Hadoop QA commented on HBASE-9321:
----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12600488/trunk-9321_v2.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 9 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.client.TestClientNoCluster

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-prefix-tree.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-client.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/6957//console

This message is automatically generated.
                
> Contention getting the current user in RpcClient$Connection.writeRequest
> ------------------------------------------------------------------------
>
>                 Key: HBASE-9321
>                 URL: https://issues.apache.org/jira/browse/HBASE-9321
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.95.2
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jimmy Xiang
>            Priority: Critical
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: trunk-9321.patch, trunk-9321_v2.patch
>
>
> I've been running tests on clusters with "lots" of regions, about 400, and I'm seeing
weird contention in the client.
> This one I see a lot, hundreds and sometimes thousands of threads are blocked like this:
> {noformat}
> "htable-pool4-t74" daemon prio=10 tid=0x00007f2254114000 nid=0x2a99 waiting for monitor
entry [0x00007f21f9e94000]
>    java.lang.Thread.State: BLOCKED (on object monitor)
> 	at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:466)
> 	- waiting to lock <0x00000000fb5ad000> (a java.lang.Class for org.apache.hadoop.security.UserGroupInformation)
> 	at org.apache.hadoop.hbase.ipc.RpcClient$Connection.writeRequest(RpcClient.java:1013)
> 	at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1407)
> 	at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1634)
> 	at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1691)
> 	at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.multi(ClientProtos.java:27339)
> 	at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:105)
> 	at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:43)
> 	at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:183)
> {noformat}
> While the holder is doing this:
> {noformat}
> "htable-pool17-t55" daemon prio=10 tid=0x00007f2244408000 nid=0x2a98 runnable [0x00007f21f9f95000]
>    java.lang.Thread.State: RUNNABLE
> 	at java.security.AccessController.getStackAccessControlContext(Native Method)
> 	at java.security.AccessController.getContext(AccessController.java:487)
> 	at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:466)
> 	- locked <0x00000000fb5ad000> (a java.lang.Class for org.apache.hadoop.security.UserGroupInformation)
> 	at org.apache.hadoop.hbase.ipc.RpcClient$Connection.writeRequest(RpcClient.java:1013)
> 	at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1407)
> 	at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1634)
> 	at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1691)
> 	at org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$BlockingStub.multi(ClientProtos.java:27339)
> 	at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:105)
> 	at org.apache.hadoop.hbase.client.MultiServerCallable.call(MultiServerCallable.java:43)
> 	at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithoutRetries(RpcRetryingCaller.java:183)
> {noformat}

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