nemon lou created YARN-276:
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Summary: 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: 2.0.1-alpha, 3.0.0
Reporter: nemon lou
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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