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Posted to yarn-dev@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2013/01/24 20:11:13 UTC

[jira] [Created] (YARN-357) App submission should not be synchronized

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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