Naganarasimha G R created YARN-4416:
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Summary: Deadlock due to synchronised get Methods in
AbstractCSQueue
Key: YARN-4416
URL: https://issues.apache.org/jira/browse/YARN-4416
Project: Hadoop YARN
Issue Type: Bug
Components: capacity scheduler, resourcemanager
Affects Versions: 2.7.1
Reporter: Naganarasimha G R
Assignee: Naganarasimha G R
Priority: Minor
While debugging in eclipse came across a scenario where in i had to get to know
the name of the queue but every time i tried to see the queue it was getting
hung. On seeing the stack realized there was a deadlock but on analysis found
out that it was only due to *queue.toString()* during debugging as
{{AbstractCSQueue.getAbsoluteUsedCapacity}} was synchronized.
Still i feel {{AbstractCSQueue}}'s getter methods need not be synchronized and
better be handled through read and write locks.
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