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https://issues.apache.org/jira/browse/YARN-4945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15241683#comment-15241683
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Eric Payne commented on YARN-4945:
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Thanks [~leftnoteasy]. I have seen the following use case where intra-queue
preemption would be necessary. [~sunilg] / [~leftnoteasy], please provide
additional use cases as you think of them.
- {{QueueA}} has 100 resources with {{User Limit Factor = 1.0}} and {{User
Limit % = 20%}}
- The whole cluster is full.
- User X's apps launch 100 containers that run for 24 hours
- User Y wants to launch an app, but even though User Y should expect at least
20% of {{QueueA}}, they can't get any resources because the cluster is full and
User X won't give any up.
> [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
>
> This is umbrella ticket to track efforts of preemption within a queue to
> support features like:
> YARN-2009. YARN-2113. YARN-4781.
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