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https://issues.apache.org/jira/browse/MAPREDUCE-2504?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Siddharth Seth updated MAPREDUCE-2504:
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Attachment: MR2504_2.patch
Added some comments about the interrupt status reset.
> MR 279: race in JobHistoryEventHandler stop
> --------------------------------------------
>
> Key: MAPREDUCE-2504
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2504
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Reporter: Siddharth Seth
> Assignee: Siddharth Seth
> Fix For: 0.23.0
>
> Attachments: MR2504.patch, MR2504_2.patch
>
>
> The condition to stop the eventHandling thread currently requires it to be
> 'stopped' AND interrupted. If an interrupt arrives after a take, but before
> handleEvent is called - the interrupt status ends up being handled by
> hadoop.util.Shell.runCommand() - which ignores it (and in the process resets
> the flag).
> The eventHandling thread subsequently hangs on eventQueue.take()
> This currently randomly fails unit tests - and can hang MR AMs.
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