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Posted to mapreduce-issues@hadoop.apache.org by "Ming Ma (JIRA)" <ji...@apache.org> on 2014/03/31 22:25:20 UTC

[jira] [Commented] (MAPREDUCE-5044) Have AM trigger jstack on task attempts that timeout before killing them

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13955652#comment-13955652 ] 

Ming Ma commented on MAPREDUCE-5044:
------------------------------------

This is quite useful. Can we get this and YARN-1515 in 2.4.0 release?

> Have AM trigger jstack on task attempts that timeout before killing them
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5044
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5044
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mr-am
>    Affects Versions: 2.1.0-beta
>            Reporter: Jason Lowe
>            Assignee: Gera Shegalov
>         Attachments: MAPREDUCE-5044.v01.patch, MAPREDUCE-5044.v02.patch, MAPREDUCE-5044.v03.patch, MAPREDUCE-5044.v04.patch, Screen Shot 2013-11-12 at 1.05.32 PM.png, Screen Shot 2013-11-12 at 1.06.04 PM.png
>
>
> When an AM expires a task attempt it would be nice if it triggered a jstack output via SIGQUIT before killing the task attempt.  This would be invaluable for helping users debug their hung tasks, especially if they do not have shell access to the nodes.



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