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From "Ming Ma (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5044) Have AM trigger jstack on task attempts that timeout before killing them
Date Mon, 06 Jun 2016 21:25:21 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317271#comment-15317271
] 

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

+1 on the latest patch. Thanks [~eepayne]. The patch doesn't resolve automatically for branch-2
and 2.8. It is straightforward and I will resolve it for those two branches.

> 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: Eric Payne
>         Attachments: MAPREDUCE-5044.008.patch, MAPREDUCE-5044.009.patch, MAPREDUCE-5044.010.patch,
MAPREDUCE-5044.011.patch, MAPREDUCE-5044.012.patch, MAPREDUCE-5044.013.patch, MAPREDUCE-5044.v01.patch,
MAPREDUCE-5044.v02.patch, MAPREDUCE-5044.v03.patch, MAPREDUCE-5044.v04.patch, MAPREDUCE-5044.v05.patch,
MAPREDUCE-5044.v06.patch, MAPREDUCE-5044.v07.local.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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