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https://issues.apache.org/jira/browse/YARN-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15301562#comment-15301562
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Hudson commented on YARN-4866:
------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #9864 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9864/])
YARN-4866. FairScheduler: AMs can consume all vcores leading to a (kasha: rev
4f513a4a8ed73beec89b7b28c0cd056ee5f4ed0d)
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/TestFairScheduler.java
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSQueue.java
*
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSLeafQueue.java
> 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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