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https://issues.apache.org/jira/browse/YARN-2113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16015002#comment-16015002
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Wangda Tan commented on YARN-2113:
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Thanks [~sunilg] / [~eepayne] for chasing the issue.
Since this is likely caused by a known issue: YARN-6538 which is related to
DRF, and it only happens when priority-first is enabled. Do you think is it
make sense to only allow USERLIMIT_FIRST in the patch. (Don't change any
internal logics, but do not allow config PRIORIRY_FIRST when doing config
validation).
I'm a little concerned that fixing the issue on a 100K+ patch is hard for
review. If rest of the patch looks fine, we can commit it, fix it with
YARN-6538, and re-enable PRIORITY_FIRST.
Thoughts?
> Add cross-user preemption within CapacityScheduler's leaf-queue
> ---------------------------------------------------------------
>
> Key: YARN-2113
> URL: https://issues.apache.org/jira/browse/YARN-2113
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: scheduler
> Reporter: Vinod Kumar Vavilapalli
> Assignee: Sunil G
> Attachments: IntraQueue Preemption-Impact Analysis.pdf,
> TestNoIntraQueuePreemptionIfBelowUserLimitAndDifferentPrioritiesWithExtraUsers.txt,
> YARN-2113.0001.patch, YARN-2113.0002.patch, YARN-2113.0003.patch,
> YARN-2113.0004.patch, YARN-2113.0005.patch, YARN-2113.0006.patch,
> YARN-2113.0007.patch, YARN-2113.0008.patch, YARN-2113.0009.patch,
> YARN-2113.0010.patch, YARN-2113.0011.patch, YARN-2113.0012.patch,
> YARN-2113.0013.patch, YARN-2113.0014.patch, YARN-2113.0015.patch,
> YARN-2113.0016.patch, YARN-2113.0017.patch, YARN-2113.0018.patch,
> YARN-2113.apply.onto.0012.ericp.patch, YARN-2113 Intra-QueuePreemption
> Behavior.pdf, YARN-2113.v0.patch
>
>
> Preemption today only works across queues and moves around resources across
> queues per demand and usage. We should also have user-level preemption within
> a queue, to balance capacity across users in a predictable manner.
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