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Posted to issues@tez.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2013/09/25 01:08:05 UTC
[jira] [Commented] (TEZ-493) Task JVMs hanging around even after
the AM/app has completed
[ https://issues.apache.org/jira/browse/TEZ-493?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13776891#comment-13776891 ]
Bikas Saha commented on TEZ-493:
--------------------------------
We cant make these daemons if these threads are per LogicalTask since then we will be leaking in the container reuse case.
> Task JVMs hanging around even after the AM/app has completed
> ------------------------------------------------------------
>
> Key: TEZ-493
> URL: https://issues.apache.org/jira/browse/TEZ-493
> Project: Apache Tez
> Issue Type: Sub-task
> Reporter: Siddharth Seth
>
> {code}
> "TezTaskEventRouter[attempt_1380003134543_0003_1_00_000000_1]" prio=5 tid=7ff149477800 nid=0x10ef34000 waiting on condition [10ef33000]
> java.lang.Thread.State: WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <7f00c9148> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
> at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)
> at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:399)
> at org.apache.tez.engine.newruntime.LogicalIOProcessorRuntimeTask$1.run(LogicalIOProcessorRuntimeTask.java:407)
> at java.lang.Thread.run(Thread.java:680)
> {code}
> That's one trace, from a process started on 09/23. Don't think any fixes went in after that, which would resolve this.
> Saw additional stuck processes because the Inputs/Ouputs created non-daemon threads (which also happened to be blocking on a queue)
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