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Posted to yarn-issues@hadoop.apache.org by "Yufei Gu (JIRA)" <ji...@apache.org> on 2016/05/10 21:14:12 UTC

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

     [ https://issues.apache.org/jira/browse/YARN-4866?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yufei Gu updated YARN-4866:
---------------------------
    Attachment: YARN-4866.001.patch

> 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
>
>
> 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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