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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5465) Tasks are often killed before they exit on their own
Date Mon, 11 May 2015 23:05:00 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538833#comment-14538833
] 

Ming Ma commented on MAPREDUCE-5465:
------------------------------------

Thanks Jason and Ray.

> Tasks are often killed before they exit on their own
> ----------------------------------------------------
>
>                 Key: MAPREDUCE-5465
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5465
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mr-am, mrv2
>            Reporter: Radim Kolar
>            Assignee: Ming Ma
>             Fix For: 2.8.0
>
>         Attachments: MAPREDUCE-5465-2.patch, MAPREDUCE-5465-3.patch, MAPREDUCE-5465-4.patch,
MAPREDUCE-5465-5.patch, MAPREDUCE-5465-6.patch, MAPREDUCE-5465-7.patch, MAPREDUCE-5465-8.patch,
MAPREDUCE-5465-9.patch, MAPREDUCE-5465-branch-2.patch, MAPREDUCE-5465.patch
>
>
> If there is profiling enabled for mapper or reducer then hprof dumps profile.out at process
exit. It is dumped after task signaled to AM that work is finished.
> AM kills container with finished work without waiting for hprof to finish dumps. If hprof
is dumping larger outputs (such as with depth=4 while depth=3 works) , it could not finish
dump in time before being killed making entire dump unusable because cpu and heap stats are
missing.
> There needs to be better delay before container is killed if profiling is enabled.



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