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https://issues.apache.org/jira/browse/YARN-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486877#comment-13486877
]
Thomas Graves commented on YARN-189:
------------------------------------
Thanks for the info Vinod. In an effort to keep changes to a minimum for now,
we can remove the synchronized from the unregisterAttempt and in allocate just
check to see if it was null when putting it. It appears the synchronized in
unregisterAttempt was just trying to prevent the memory leak of adding the
response back to the responseMap after it had been unregistered.
> 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
>
> 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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