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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5566) client-side NM graceful decom doesn't trigger when jobs finish
Date Wed, 31 Aug 2016 23:41:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-5566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15453742#comment-15453742
] 

Junping Du commented on YARN-5566:
----------------------------------

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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