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https://issues.apache.org/jira/browse/YARN-2009?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15097704#comment-15097704
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Wangda Tan commented on YARN-2009:
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Hi [~sunilg]/[~eepayne].
I was thinking YARN-4108 could resolve it. But I found the original plan (see
design doc v2) is not a doable plan in a short term. I uploaded v3 only handles
part of the original issue (avoid unnecessary preemption happens), and leaves
how to select to-be preempted containers as-is.
If you have time, could you take a look at latest proposal of YARN-4108. I
think how to choose to-be preempted containers should be handled inside PCPP by
different policies. We've put too many logics (like sorted by FIFO order, not
preempt AM container, etc) to PCPP, maybe it's time to cleanup them to a better
form.
> 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
>
> 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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