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https://issues.apache.org/jira/browse/YARN-276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13673453#comment-13673453
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Hadoop QA commented on YARN-276:
--------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12580000/YARN-276.patch
against trunk revision .
{color:red}-1 patch{color}. The patch command could not apply the patch.
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/1081//console
This message is automatically generated.
> 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
>
> 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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