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https://issues.apache.org/jira/browse/YARN-6163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15868052#comment-15868052
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Karthik Kambatla commented on YARN-6163:
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The test failures seem unrelated; the patch is localized to FairScheduler. 

> FS Preemption is a trickle for severely starved applications
> ------------------------------------------------------------
>
>                 Key: YARN-6163
>                 URL: https://issues.apache.org/jira/browse/YARN-6163
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: fairscheduler
>    Affects Versions: 2.9.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>         Attachments: YARN-6163.004.patch, yarn-6163-1.patch, yarn-6163-2.patch
>
>
> With current logic, only one RR is considered per each instance of marking an 
> application starved. This marking happens only on the update call that runs 
> every 500ms.  Due to this, an application that is severely starved takes 
> forever to reach fairshare based on preemptions.



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