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Date: Tue, 30 Oct 2012 17:54:13 +0000 (UTC)
From: "Robert Joseph Evans (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <1016386135.45765.1351619653165.JavaMail.jiratomcat@arcas>
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Subject: [jira] [Commented] (YARN-189) deadlock in RM - AMResponse object
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    [ https://issues.apache.org/jira/browse/YARN-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487064#comment-13487064 ] 

Robert Joseph Evans commented on YARN-189:
------------------------------------------

The change looks good to me. I don't see any real issues with it.  I am a +1 for it.  I am not going to check it in to give Vinod and others some time to comment if they want to.  
                
> deadlock in RM - AMResponse object
> ----------------------------------
>
>                 Key: YARN-189
>                 URL: https://issues.apache.org/jira/browse/YARN-189
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 0.23.4
>            Reporter: Thomas Graves
>            Assignee: Thomas Graves
>            Priority: Critical
>         Attachments: YARN-189.patch
>
>
> we ran into a deadlock in the RM.
> =============================
> "1128743461@qtp-1252749669-5201":
>   waiting for ownable synchronizer 0x00002aabbc87b960, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
>   which is held by "AsyncDispatcher event handler"
> "AsyncDispatcher event handler":
>   waiting to lock monitor 0x00002ab0bba3a370 (object 0x00002aab3d4cd698, a org.apache.hadoop.yarn.api.records.impl.pb.AMResponsePBImpl),
>   which is held by "IPC Server handler 36 on 8030"
> "IPC Server handler 36 on 8030":
>   waiting for ownable synchronizer 0x00002aabbc87b960, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
>   which is held by "AsyncDispatcher event handler"
> Java stack information for the threads listed above:
> ===================================================
> "1128743461@qtp-1252749669-5201":
>         at sun.misc.Unsafe.park(Native Method)
>         - parking to wait for  <0x00002aabbc87b960> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
>         at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:941)        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1261)
>         at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:594)        at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.getFinalApplicationStatus(RMAppAttemptImpl.java:2
> 95)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.getFinalApplicationStatus(RMAppImpl.java:222)
>         at org.apache.hadoop.yarn.server.resourcemanager.webapp.RMWebServices.getApps(RMWebServices.java:328)
>         at sun.reflect.GeneratedMethodAccessor41.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
>         at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
>         at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaM
> ...
> ...
> ..
>   
> "AsyncDispatcher event handler":
>         at org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.unregisterAttempt(ApplicationMasterService.java:307)
>         - waiting to lock <0x00002aab3d4cd698> (a org.apache.hadoop.yarn.api.records.impl.pb.AMResponsePBImpl)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl$BaseFinalTransition.transition(RMAppAttemptImpl.java:647)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl$FinalTransition.transition(RMAppAttemptImpl.java:809)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl$FinalTransition.transition(RMAppAttemptImpl.java:796)
>         at org.apache.hadoop.yarn.state.StateMachineFactory$SingleInternalArc.doTransition(StateMachineFactory.java:357)
>         at org.apache.hadoop.yarn.state.StateMachineFactory.doTransition(StateMachineFactory.java:298)
>         at org.apache.hadoop.yarn.state.StateMachineFactory.access$300(StateMachineFactory.java:43)
>         at org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine.doTransition(StateMachineFactory.java:443)
>         - locked <0x00002aabbb673090> (a org.apache.hadoop.yarn.state.StateMachineFactory$InternalStateMachine)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.handle(RMAppAttemptImpl.java:478)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.handle(RMAppAttemptImpl.java:81)
>         at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher.handle(ResourceManager.java:436)
>         at org.apache.hadoop.yarn.server.resourcemanager.ResourceManager$ApplicationAttemptEventDispatcher.handle(ResourceManager.java:417)
>         at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:126)
>         at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:75)
>         at java.lang.Thread.run(Thread.java:619)
> "IPC Server handler 36 on 8030":
>         at sun.misc.Unsafe.park(Native Method)
>         - parking to wait for  <0x00002aabbc87b960> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
>         at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:842)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1178)
>         at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:807)
>         at org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.pullJustFinishedContainers(RMAppAttemptImpl.java:437)
>         at org.apache.hadoop.yarn.server.resourcemanager.ApplicationMasterService.allocate(ApplicationMasterService.java:285)
>         - locked <0x00002aab3d4cd698> (a org.apache.hadoop.yarn.api.records.impl.pb.AMResponsePBImpl)
>         at org.apache.hadoop.yarn.api.impl.pb.service.AMRMProtocolPBServiceImpl.allocate(AMRMProtocolPBServiceImpl.java:56)
>         at org.apache.hadoop.yarn.proto.AMRMProtocol$AMRMProtocolService$2.callBlockingMethod(AMRMProtocol.java:87)
>         at org.apache.hadoop.yarn.ipc.ProtoOverHadoopRpcEngine$Server.call(ProtoOverHadoopRpcEngine.java:353)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1528)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1524)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1212)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1522)

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