[jira] [Updated] (YARN-4212) FairScheduler: Parent queues with 'Fair' policy should compute shares of all resources for its children during a recompute

["Arun Suresh (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-4212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun Suresh updated YARN-4212:
------------------------------
    Attachment: YARN-4212.1.patch

Attaching trivial patch

> FairScheduler: Parent queues with 'Fair' policy should compute shares of all resources for its children during a recompute
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4212
>                 URL: https://issues.apache.org/jira/browse/YARN-4212
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>              Labels: fairscheduler
>         Attachments: YARN-4212.1.patch
>
>
> The Fair Scheduler, while performing a {{recomputeShares()}} during an {{update()}} call, uses the parent queues policy to distribute shares to its children.
> If the parent queues policy is 'fair', it only computes weight for memory and sets the vcores fair share of its children to 0.
> Assuming a situation where we have 1 parent queue with policy 'fair' and multiple leaf queues with policy 'drf', Any app submitted to the child queues with vcore requirement > 1 will always be above fairshare, since during the recomputeShare process, the child queues were all assigned 0 for fairshare vcores.



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