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https://issues.apache.org/jira/browse/YARN-5819?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15655248#comment-15655248
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Karthik Kambatla commented on YARN-5819:
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Since updating {{Resource}} is not atomic, it seemed safer to do
reads/writes/updates protected by a lock.
> Verify fairshare and minshare preemption
> ----------------------------------------
>
> Key: YARN-5819
> URL: https://issues.apache.org/jira/browse/YARN-5819
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: fairscheduler
> Affects Versions: 2.9.0
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Attachments: yarn-5819.YARN-4752.1.patch,
> yarn-5819.YARN-4752.2.patch, yarn-5819.YARN-4752.3.patch,
> yarn-5819.YARN-4752.4.patch
>
>
> JIRA to track the unit test(s) verifying both fairshare and minshare
> preemption. The tests should verify:
> # preemption within a single leaf queue
> # preemption between sibling leaf queues
> # preemption between non-sibling leaf queues
> # {{allowPreemption = false}} should disallow preemption from a queue
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