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https://issues.apache.org/jira/browse/YARN-4834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15226424#comment-15226424
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Nathan Roberts commented on YARN-4834:
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As a note, we were seeing this with slider applications. I didn't investigate
far enough to know if all slider applications escape or if this was just a a
characteristic of this particular application.
> ProcfsBasedProcessTree doesn't track daemonized processes
> ---------------------------------------------------------
>
> Key: YARN-4834
> URL: https://issues.apache.org/jira/browse/YARN-4834
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 3.0.0, 2.7.2
> Reporter: Nathan Roberts
> Assignee: Nathan Roberts
> Attachments: YARN-4834.001.patch
>
>
> Currently the algorithm uses ppid from /proc/<pid>/stat which can be 1 if a
> child process has daemonized itself. This causes potentially large processes
> from not being monitored.
> session id might be a better choice since that's what we use to signal the
> container during teardown.
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