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https://issues.apache.org/jira/browse/YARN-4752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15189698#comment-15189698
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Karthik Kambatla commented on YARN-4752:
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Yes, my current intent is to split scheduling and preemption, as you can see in
my initial patch posted on the github link above.
> [Umbrella] FairScheduler: Improve preemption
> --------------------------------------------
>
> Key: YARN-4752
> URL: https://issues.apache.org/jira/browse/YARN-4752
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.8.0
> Reporter: Karthik Kambatla
>
> A number of issues have been reported with respect to preemption in
> FairScheduler along the lines of:
> # FairScheduler preempts resources from nodes even if the resultant free
> resources cannot fit the incoming request.
> # Preemption doesn't preempt from sibling queues
> # Preemption doesn't preempt from sibling apps under the same queue that is
> over its fairshare
> # ...
> Filing this umbrella JIRA to group all the issues together and think of a
> comprehensive solution.
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