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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-357) App submission should not be synchronized
Date Wed, 06 Feb 2013 15:23:22 GMT

    [ https://issues.apache.org/jira/browse/YARN-357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13572486#comment-13572486
] 

Daryn Sharp commented on YARN-357:
----------------------------------

Sid, thanks a lot for your help.  I'll commit shortly.
                
> 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: 0.23.3, 3.0.0, 2.0.0-alpha
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: YARN-357.patch, YARN-357.patch, YARN-357.txt
>
>
> 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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