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https://issues.apache.org/jira/browse/YARN-276?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13675315#comment-13675315
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Thomas Graves commented on YARN-276:
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Thanks Nemon, I'm still reviewing it, here are a couple of things so far. I
hope to finish reviewing later tonight.
- LeafQueue - please wrap at 80 characters
- LeafQueue - please use the @VisibleForTesting annoation in
setMaxAMResourcePerQueuePerUserPercent
- FicaSchedulerApp - for misspelled as foe
- FicaSchedulerApp - please use the @VisibleForTesting annotation around
setAMResource
I ran a few tests and looked at the scheduler webui for the queue I was running
in and the used resource and am used resources showed up blank even though
there were jobs running. Can you please take a look to see why? The REST web
services call were returning values for those fields.
> 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
>
> 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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