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Date: Wed, 8 Feb 2017 23:08:41 +0000 (UTC)
From: "Yufei Gu (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.12901530.1443600779000.33130.1486595321836@Atlassian.JIRA>
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References: <JIRA.12901530.1443600779000@Atlassian.JIRA> <JIRA.12901530.1443600779448@jira-lw-us.apache.org>
Subject: [jira] [Updated] (YARN-4212) FairScheduler: Parent queues is not
 allowed to be 'Fair' policy if its children have the "drf" policy
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archived-at: Wed, 08 Feb 2017 23:08:46 -0000


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

Yufei Gu updated YARN-4212:
---------------------------
    Attachment: YARN-4212.009.patch

> 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-4212.008.patch, YARN-4212.009.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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