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Posted to yarn-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2016/03/24 23:24:25 UTC

[jira] [Created] (YARN-4866) FairScheduler: AMs can consume all vcores leading to a livelock when using FAIR policy

Karthik Kambatla created YARN-4866:
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             Summary: 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: Karthik Kambatla


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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