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https://issues.apache.org/jira/browse/YARN-3678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15082201#comment-15082201
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gu-chi commented on YARN-3678:
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same issue as confirmed with [~hex108]
> 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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