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From "Arun Suresh (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3902) Fair scheduler preempts ApplicationMaster
Date Sat, 30 Jan 2016 16:12:39 GMT

    [ https://issues.apache.org/jira/browse/YARN-3902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15124947#comment-15124947

Arun Suresh commented on YARN-3902:

Hello [~He Tianyi], Sure.. Ill assign this to you.. I can help with the reviews etc.

BTW. now that YARN-3116 is resolved, you can figure out which is the AM container.. and should
make things a bit simpler

> Fair scheduler preempts ApplicationMaster
> -----------------------------------------
>                 Key: YARN-3902
>                 URL: https://issues.apache.org/jira/browse/YARN-3902
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 2.3.0
>         Environment: 3.16.0-0.bpo.4-amd64 #1 SMP Debian 3.16.7-ckt2-1~bpo70+1 (2014-12-08)
>            Reporter: He Tianyi
>            Assignee: Arun Suresh
>   Original Estimate: 72h
>  Remaining Estimate: 72h
> YARN-2022 have fixed the similar issue related to CapacityScheduler.
> However, FairScheduler still suffer, preempting AM while other normal containers running
out there.
> I think we should take the same approach, avoid AM being preempted unless there is no
container running other than AM.

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