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https://issues.apache.org/jira/browse/YARN-4462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059462#comment-15059462
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Naganarasimha G R commented on YARN-4462:
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IIRC its introduced as part of YARN-2056 and available in 2.7.0
> Scheduler should prevent certain application from being preempted
> -----------------------------------------------------------------
>
> Key: YARN-4462
> URL: https://issues.apache.org/jira/browse/YARN-4462
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: scheduler
> Affects Versions: 2.6.0
> Reporter: Tao Jie
>
> When scheduler preemption is enabled, applications could be preempted if they
> obtain resource over they should take.
> When a mapreduce application is preempted some resource, it just runs slower.
> However, when the preempted application is a long-run service, such as tomcat
> running in slider, the service would fail.
> So we should have a flag for application to indicate the scheduler that those
> application should not be preempted.
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