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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (YARN-5919) FairSharePolicy is not reasonable when sorting the application
Date Thu, 08 Dec 2016 00:38:58 GMT

     [ https://issues.apache.org/jira/browse/YARN-5919?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Karthik Kambatla updated YARN-5919:
-----------------------------------
    Fix Version/s:     (was: 2.7.1)

> FairSharePolicy is not reasonable when sorting the application
> --------------------------------------------------------------
>
>                 Key: YARN-5919
>                 URL: https://issues.apache.org/jira/browse/YARN-5919
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: yarn
>    Affects Versions: 2.7.1
>         Environment: CentOS-7.1
>            Reporter: zhengchenyu
>              Labels: fairscheduler
>   Original Estimate: 504h
>  Remaining Estimate: 504h
>
> I use the FairSharePolicy to  sort the runnableApps in FSLeafQueue. For the comparation
of FSAppAttempt, s1Needy and s1Needy must be negtive. So FairSharePolicy will use useToWeightRatio
to compare.  This algorithm only consider the ResourceUsage of the FSAppAttempt. There is
a unreasonable phenomenon: A low ResourceUsage FsAppAttemp with no demand(or request) will
be in front of the queue, then skip this chance of assigning container.



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