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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4212) FairScheduler: Parent queues is not allowed to be 'Fair' policy if its children have the "drf" policy
Date Thu, 19 Jan 2017 20:20:26 GMT

    [ https://issues.apache.org/jira/browse/YARN-4212?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15830540#comment-15830540
] 

ASF GitHub Bot commented on YARN-4212:
--------------------------------------

GitHub user flyrain opened a pull request:

    https://github.com/apache/hadoop/pull/181

    YARN-4212. FairScheduler: Parent queues is not allowed to be 'Fair' policy if its children
have the "drf" policy.

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/flyrain/hadoop yarn-4212

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/hadoop/pull/181.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #181
    
----
commit 5eac6a6a6baf14f65e065b907ae8376b20e25b60
Author: Yufei Gu <yufei.gu@cloudera.com>
Date:   2017-01-19T18:39:27Z

    YARN-4212. FairScheduler: Parent queues is not allowed to be 'Fair' policy if its children
have the "drf" policy.

----


> FairScheduler: Parent queues is not allowed to be 'Fair' policy if its children have
the "drf" policy
> -----------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4212
>                 URL: https://issues.apache.org/jira/browse/YARN-4212
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Arun Suresh
>            Assignee: Yufei Gu
>              Labels: fairscheduler
>         Attachments: YARN-4212.002.patch, YARN-4212.003.patch, YARN-4212.004.patch, YARN-4212.005.patch,
YARN-4212.006.patch, YARN-4212.007.patch, 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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