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https://issues.apache.org/jira/browse/YARN-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15300605#comment-15300605
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Yufei Gu commented on YARN-4866:
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Uploaded patch 009 to fix style and javadoc issues.
> FairScheduler: AMs can consume all vcores leading to a livelock when using
> FAIR policy
> --------------------------------------------------------------------------------------
>
> Key: YARN-4866
> URL: https://issues.apache.org/jira/browse/YARN-4866
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 2.8.0
> Reporter: Karthik Kambatla
> Assignee: Yufei Gu
> Attachments: YARN-4866.001.patch, YARN-4866.002.patch,
> YARN-4866.003.patch, YARN-4866.004.patch, YARN-4866.005.patch,
> YARN-4866.006.patch, YARN-4866.007.patch, YARN-4866.008.patch,
> YARN-4866.009.patch
>
>
> The maxAMShare uses the queue's policy for enforcing limits. When using FAIR
> policy, this considers only memory. If there are fewer vcores on the cluster,
> the AMs can end up taking all the vcores leading to a livelock.
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