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https://issues.apache.org/jira/browse/YARN-189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487331#comment-13487331
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Vinod Kumar Vavilapalli commented on YARN-189:
----------------------------------------------
If you throw an exception when the previous response isn't there, the AM might
ignore it. The MR AM currently ignores exceptions upto a certain count (that's
a separate bug) irrespective of the failure type. If you send a reboot command,
that is better.
Exception handling on the MR AM side is totally broken, it doesn't seem to
shutdown the AM on getting critical exceptions or reboot commands from the RM -
another bug.
> 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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