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https://issues.apache.org/jira/browse/YARN-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15609409#comment-15609409
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Sunil G commented on YARN-2009:
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I understand the reason for this issue. Queue's free resource were not
considered in the algorithm while calculating idealAssigned. So current code
will work in cases where queue is full or overflowed. If queue is
under-utilized, we may do over preemption.
I ll share a patch short while.
> Priority support for preemption in ProportionalCapacityPreemptionPolicy
> -----------------------------------------------------------------------
>
> Key: YARN-2009
> URL: https://issues.apache.org/jira/browse/YARN-2009
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: capacityscheduler
> Reporter: Devaraj K
> Assignee: Sunil G
> Attachments: YARN-2009.0001.patch, YARN-2009.0002.patch,
> YARN-2009.0003.patch, YARN-2009.0004.patch, YARN-2009.0005.patch,
> YARN-2009.0006.patch, YARN-2009.0007.patch, YARN-2009.0008.patch,
> YARN-2009.0009.patch, YARN-2009.0010.patch, YARN-2009.0011.patch,
> YARN-2009.0012.patch, YARN-2009.0013.patch, YARN-2009.0014.patch,
> YARN-2009.0015.patch
>
>
> While preempting containers based on the queue ideal assignment, we may need
> to consider preempting the low priority application containers first.
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