MENG DING created YARN-4671:
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Summary: There is no need to acquire CS lock when completing a
container
Key: YARN-4671
URL: https://issues.apache.org/jira/browse/YARN-4671
Project: Hadoop YARN
Issue Type: Improvement
Reporter: MENG DING
Assignee: MENG DING
In YARN-4519, we discovered that there is no need to acquire CS lock in
CS#completedContainerInternal, because:
* Access to critical section are already guaranteed by queue lock.
* It is not essential to guard {{schedulerHealth}} with cs lock. All maps in
schedulerHealth are concurrent maps.
With this fix, we can truly claim that CS#allocate doesn't require CS lock.
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