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From "Robert Joseph Evans (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4157) ResourceManager should not kill apps that are well behaved
Date Thu, 19 Apr 2012 17:46:41 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13257627#comment-13257627
] 

Robert Joseph Evans commented on MAPREDUCE-4157:
------------------------------------------------

I am not an expert on all of the transitions in the RM so more reviews would probably be good.
The code looks good to me and the tests look good to me.  I looked at the transition diagrams
and the changes made look fine. +1
                
> 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
>            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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