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Posted to yarn-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2013/01/25 20:09:13 UTC

[jira] [Updated] (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:all-tabpanel ]

Daryn Sharp updated YARN-360:
-----------------------------

    Attachment: YARN-360.patch
    
> 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
>            Priority: Critical
>         Attachments: 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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