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From "SaintBacchus (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-4694) Long-run user thread(such as HiveThriftServer2) causes the 'process leak' in yarn-client mode
Date Tue, 02 Dec 2014 13:08:12 GMT

    [ https://issues.apache.org/jira/browse/SPARK-4694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14231440#comment-14231440
] 

SaintBacchus commented on SPARK-4694:
-------------------------------------

The reason was that Yarn had reported the status to the RM and the YarnClientSchedulerBackend
would detect the status to stop sc in function 'asyncMonitorApplication'.
But the HiveThriftServer2 is a long-run user thread. JVM will never exit until all the no-demo
threads have ended or using System.exit().
It cause such problem.
The easiest way to reslove this problem is using System.exit(0) instead of sc.stop in funciton
'asyncMonitorApplication' .
But system.exit is not recommended in https://issues.apache.org/jira/browse/SPARK-4584
Do you have any ideas about this problem? [~vanzin]

> Long-run user thread(such as HiveThriftServer2) causes the 'process leak' in yarn-client
mode
> ---------------------------------------------------------------------------------------------
>
>                 Key: SPARK-4694
>                 URL: https://issues.apache.org/jira/browse/SPARK-4694
>             Project: Spark
>          Issue Type: Bug
>          Components: YARN
>            Reporter: SaintBacchus
>
> Recently when I use the Yarn HA mode to test the HiveThriftServer2 I found a problem
that the driver can't exit by itself.
> To reappear it, you can do as fellow:
> 1.use yarn HA mode and set am.maxAttemp = 1for convenience
> 2.kill the active resouce manager in cluster
> The expect result is just failed, because the maxAttemp was 1.
> But the actual result is that: all executor was ended but the driver was still there
and never close.



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