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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6771) RMContainerAllocator sends container diagnostics event after corresponding completion event
Date Mon, 26 Sep 2016 16:37:20 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15523544#comment-15523544
] 

Haibo Chen commented on MAPREDUCE-6771:
---------------------------------------

Thanks Jason! That works perfectly. Uploading a new patch.

> RMContainerAllocator sends container diagnostics event after corresponding completion
event
> -------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6771
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6771
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.7.3
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>         Attachments: TaUnsuccessfullyEventEmission.jpg, mapreduce6771.001.patch, mapreduce6771.002.patch,
mapreduce6771.003.patch, mapreduce6771.004.patch
>
>
> Task containers can go over their resource limit, and killed by Node Manager. Then MR
AM gets notified of the container status and diagnostics information through its heartbeat
with RM.  However, it is possible that the diagnostics information never gets into .jhist
file, so when the job completes, the diagnostics information associated with the failed task
attempts is empty.  This makes it hard for users to root cause job failures that are often
caused by memory leak.



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