Daryn Sharp created YARN-357:
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Summary: App submission should not be synchronized
Key: YARN-357
URL: https://issues.apache.org/jira/browse/YARN-357
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.0.0-alpha, 3.0.0, 0.23.3
Reporter: Daryn Sharp
Assignee: Daryn Sharp
MAPREDUCE-2953 fixed a race condition with querying of app status by making
{{RMClientService#submitApplication}} synchronously invoke
{{RMAppManager#submitApplication}}. However, the {{synchronized}} keyword was
also added to {{RMAppManager#submitApplication}} with the comment:
bq. I made the submitApplication synchronized to keep it consistent with the
other routines in RMAppManager although I do not believe it needs it since the
rmapp datastructure is already a concurrentMap and I don't see anything else
that would be an issue.
It's been observed that app submission latency is being unnecessarily impacted.
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