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From "Rohith (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-276) Capacity Scheduler can hang when submit many jobs concurrently
Date Fri, 08 May 2015 16:32:02 GMT

    [ https://issues.apache.org/jira/browse/YARN-276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14534835#comment-14534835
] 

Rohith commented on YARN-276:
-----------------------------

Any  update on this issue? Is this problem still exists in trunk and branch-2?

> 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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