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https://issues.apache.org/jira/browse/YARN-3902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15125609#comment-15125609
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He Tianyi commented on YARN-3902:
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Is it necessary that we make this 'preempting containers other than AMs' thing
optional?
I investigated preemption related codes in {{CapacityScheduler}} and there is
no option to control this behavior.
> 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) x86_64
> 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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