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https://issues.apache.org/jira/browse/YARN-2154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14698178#comment-14698178
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Karthik Kambatla commented on YARN-2154:
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[~bpodgursky] - I was only observing what the patch seems to be doing.
The patch prioritizes currently running apps over pending apps. The pending
apps aren't necessarily starved - subsequent preemptions should handle them.
[~asuresh] - could you please confirm the same. If this is not the case, I
agree with [~bpodgursky] that we shouldn't starve small apps.
> FairScheduler: Improve preemption to preempt only those containers that would
> satisfy the incoming request
> ----------------------------------------------------------------------------------------------------------
>
> Key: YARN-2154
> URL: https://issues.apache.org/jira/browse/YARN-2154
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Affects Versions: 2.4.0
> Reporter: Karthik Kambatla
> Assignee: Arun Suresh
> Priority: Critical
> Attachments: YARN-2154.1.patch
>
>
> Today, FairScheduler uses a spray-gun approach to preemption. Instead, it
> should only preempt resources that would satisfy the incoming request.
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