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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-276) Capacity Scheduler can hang when submit many jobs concurrently
Date Fri, 08 May 2015 17:27:03 GMT

     [ https://issues.apache.org/jira/browse/YARN-276?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Wangda Tan resolved YARN-276.
-----------------------------
          Resolution: Duplicate
    Target Version/s: 2.1.0-beta, 3.0.0  (was: 3.0.0, 2.1.0-beta)

[~vinodkv],
This is already fixed by YARN-2637. Closing this as duplicated.

> Capacity Scheduler can hang when submit many jobs concurrently
> --------------------------------------------------------------
>
>                 Key: YARN-276
>                 URL: https://issues.apache.org/jira/browse/YARN-276
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 3.0.0, 2.0.1-alpha
>            Reporter: Nemon Lou
>            Assignee: Nemon Lou
>              Labels: incompatible
>         Attachments: YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch,
YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch,
YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch, YARN-276.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> In hadoop2.0.1,When i submit many jobs concurrently at the same time,Capacity scheduler
can hang with most resources taken up by AM and don't have enough resources for tasks.And
then all applications hang there.
> The cause is that "yarn.scheduler.capacity.maximum-am-resource-percent" not check directly.Instead
,this property only used for maxActiveApplications. And maxActiveApplications is computed
by minimumAllocation (not by Am actually used).



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