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Posted to yarn-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2013/11/08 10:28:34 UTC

[jira] [Commented] (YARN-914) Support graceful decommission of nodemanager

    [ https://issues.apache.org/jira/browse/YARN-914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13817145#comment-13817145 ] 

Steve Loughran commented on YARN-914:
-------------------------------------

YARN-1394 adds the need for AMs to be told of NM failure/decommission as causes for container completion

> 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
>
> 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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