Jason Lowe created YARN-3487:
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Summary: CapacityScheduler.getQueueInfo grabs scheduler lock
unnecessarily
Key: YARN-3487
URL: https://issues.apache.org/jira/browse/YARN-3487
Project: Hadoop YARN
Issue Type: Bug
Components: capacityscheduler
Affects Versions: 2.6.0
Reporter: Jason Lowe
Assignee: Jason Lowe
Priority: Critical
Recently saw a significant slowdown of applications on a large cluster, and we
noticed there were a large number of blocked threads on the RM. Most of the
blocked threads were waiting for the CapacityScheduler lock while calling
getQueueInfo.
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