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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-914) (Umbrella) Support graceful decommission of nodemanager
Date Wed, 18 Mar 2015 20:51:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14367873#comment-14367873
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Junping Du commented on YARN-914:
---------------------------------

Hi, can someone in watch list help to review patch in sub JIRA YARN-3212? Thanks!

> (Umbrella) Support graceful decommission of nodemanager
> -------------------------------------------------------
>
>                 Key: YARN-914
>                 URL: https://issues.apache.org/jira/browse/YARN-914
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.0.4-alpha
>            Reporter: Luke Lu
>            Assignee: Junping Du
>         Attachments: Gracefully Decommission of NodeManager (v1).pdf, Gracefully Decommission
of NodeManager (v2).pdf, GracefullyDecommissionofNodeManagerv3.pdf
>
>
> When NMs are decommissioned for non-fault reasons (capacity change etc.), it's desirable
to minimize the impact to running applications.
> Currently if a NM is decommissioned, all running containers on the NM need to be rescheduled
on other NMs. Further more, for finished map tasks, if their map output are not fetched by
the reducers of the job, these map tasks will need to be rerun as well.
> We propose to introduce a mechanism to optionally gracefully decommission a node manager.



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