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https://issues.apache.org/jira/browse/MAPREDUCE-4157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13289640#comment-13289640
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Ravi Prakash commented on MAPREDUCE-4157:
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Vinod! The problem might have been of my making. As part of MAPREDUCE-3614 I
needed to include FileSystem.closeAll() *after* stopping -a-l-l- most of the
services (because some of the services wrote to HDFS) However, the unregister
call is being sent as part of the RMCommunicator.stop() call, right? There are
several ways we can ensure the FileSystem.closeAll() is called just before the
unregister call. Do you have anything in mind?
> ResourceManager should not kill apps that are well behaved
> ----------------------------------------------------------
>
> Key: MAPREDUCE-4157
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4157
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Affects Versions: 2.0.0-alpha
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Attachments: MAPREDUCE-4157.patch
>
>
> Currently when the ApplicationMaster unregisters with the ResourceManager,
> the RM kills (via the NMs) all the active containers for an application.
> This introduces a race where the AM may be trying to clean up and may not
> finish before it is killed. The RM should give the AM a chance to exit
> cleanly on its own rather than always race with a pending kill on shutdown.
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