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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4945) [Umbrella] Capacity Scheduler Preemption Within a queue
Date Tue, 06 Sep 2016 05:42:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15466489#comment-15466489

Sunil G commented on YARN-4945:

Thanks [~eepayne]

bq.LeafQueue#getApplications returns an umnodifiable Collection
Yes, I have made changes to handle this scenario.

bq.if it's already in selectedCandidates, it's because an inter-queue preemption policy put
it there
I think I must give some more clarity for what I am trying to do here. Its possible that there
can be some containers which were selected by priority/user-limit policy may already be selected
from inter-queue policies. In that case, we need not have to mark them again. Rather we can
deduct the resource directly as its container marked for preemption.

bq.container's resources twice from toObtainByPartition
Its a mistake, I corrected the same in second patch.

> [Umbrella] Capacity Scheduler Preemption Within a queue
> -------------------------------------------------------
>                 Key: YARN-4945
>                 URL: https://issues.apache.org/jira/browse/YARN-4945
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Wangda Tan
>         Attachments: Intra-Queue Preemption Use Cases.pdf, IntraQueuepreemption-CapacityScheduler
(Design).pdf, YARN-2009-wip.2.patch, YARN-2009-wip.patch
> This is umbrella ticket to track efforts of preemption within a queue to support features
> YARN-2009. YARN-2113. YARN-4781.

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