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https://issues.apache.org/jira/browse/YARN-3678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14560676#comment-14560676
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Varun Vasudev commented on YARN-3678:
-------------------------------------

[~zhiguohong] - sorry my question was - after applying your fix, the problem 
should have gone away. However, you said - "With this fix, the "accident" rate 
is reduced from several times per day to nearly zero." Do you know why it still 
happened?

> DelayedProcessKiller may kill other process other than container
> ----------------------------------------------------------------
>
>                 Key: YARN-3678
>                 URL: https://issues.apache.org/jira/browse/YARN-3678
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.6.0
>            Reporter: gu-chi
>            Priority: Critical
>
> Suppose one container finished, then it will do clean up, the PID file still 
> exist and will trigger once singalContainer, this will kill the process with 
> the pid in PID file, but as container already finished, so this PID may be 
> occupied by other process, this may cause serious issue.
> As I know, my NM was killed unexpectedly, what I described can be the cause. 
> Even rarely occur.



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