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Posted to yarn-issues@hadoop.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2013/02/05 00:38:13 UTC

[jira] [Commented] (YARN-360) Allow apps to concurrently register tokens for renewal

    [ https://issues.apache.org/jira/browse/YARN-360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570746#comment-13570746 ] 

Siddharth Seth commented on YARN-360:
-------------------------------------

+1. Committing this. Nice unit test btw. The test failure isn't related; passes locally on multiple runs.
                
> Allow apps to concurrently register tokens for renewal
> ------------------------------------------------------
>
>                 Key: YARN-360
>                 URL: https://issues.apache.org/jira/browse/YARN-360
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 0.23.3, 3.0.0, 2.0.0-alpha
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: YARN-357.patch, YARN-360.patch
>
>
> {{DelegationTokenRenewer#addApplication}} has an unnecessary {{synchronized}} keyword.  This serializes job submissions and can add unnecessary latency and/or hang all submissions if there are problems renewing the token.

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