Wangda Tan created YARN-2925:
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Summary: Internal fields in LeafQueue access should be protected
when accessed from FiCaSchedulerApp to calculate Headroom
Key: YARN-2925
URL: https://issues.apache.org/jira/browse/YARN-2925
Project: Hadoop YARN
Issue Type: Bug
Components: capacityscheduler
Reporter: Wangda Tan
Assignee: Wangda Tan
Priority: Critical
Upon YARN-2644, FiCaScheduler will calculation up-to-date headroom before
sending back Allocation response to AM.
Headroom calculation is happened in LeafQueue side, uses fields like used
resource, etc. But it is not protected by any lock of LeafQueue, so it might be
corrupted is someone else is editing it.
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