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https://issues.apache.org/jira/browse/YARN-5566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15453742#comment-15453742
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Junping Du commented on YARN-5566:
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bq. I'm not exactly sure why this is happening, but from what I can tell, this
issue is based on some timing of when things occur, and somehow DECOMMISSIONING
makes it more likely to happen.
[~kasha], can you hold on the commit given we are not 100% sure this fix is
enough and side-effect? I will do more investigation and review today.
> client-side NM graceful decom doesn't trigger when jobs finish
> --------------------------------------------------------------
>
> Key: YARN-5566
> URL: https://issues.apache.org/jira/browse/YARN-5566
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Affects Versions: 2.8.0
> Reporter: Robert Kanter
> Assignee: Robert Kanter
> Attachments: YARN-5566.001.patch, YARN-5566.002.patch,
> YARN-5566.003.patch, YARN-5566.004.patch
>
>
> I was testing the client-side NM graceful decommission and noticed that it
> was always waiting for the timeout, even if all jobs running on that node (or
> even the cluster) had already finished.
> For example:
> # JobA is running with at least one container on NodeA
> # User runs client-side decom on NodeA at 5:00am with a timeout of 3 hours
> --> NodeA enters DECOMMISSIONING state
> # JobA finishes at 6:00am and there are no other jobs running on NodeA
> # User's client reaches the timeout at 8:00am, and forcibly decommissions
> NodeA
> NodeA should have decommissioned at 6:00am.
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