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Posted to yarn-issues@hadoop.apache.org by "Karthik Kambatla (JIRA)" <ji...@apache.org> on 2012/12/08 01:05:21 UTC

[jira] [Commented] (YARN-264) Inconsistent synchronization in yarn.server.rm.security.DelegationTokenRenewal

    [ https://issues.apache.org/jira/browse/YARN-264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13526903#comment-13526903 ] 

Karthik Kambatla commented on YARN-264:
---------------------------------------

Clone of MR-4860 for YARN.
                
> Inconsistent synchronization in yarn.server.rm.security.DelegationTokenRenewal
> ------------------------------------------------------------------------------
>
>                 Key: YARN-264
>                 URL: https://issues.apache.org/jira/browse/YARN-264
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.0.2-alpha
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>
> yarn.s.rm.security.DelegationTokenRenewer uses TimerTask/Timer. When such a timer task is canceled, already scheduled tasks run to completion. The task should check for such cancellation before running. Also, delegationTokens needs to be synchronized on all accesses.

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