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Posted to yarn-issues@hadoop.apache.org by "Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org> on 2013/05/07 00:20:16 UTC
[jira] [Updated] (YARN-503) DelegationTokens will be renewed
forever if multiple jobs share tokens and the first one sets
JOB_CANCEL_DELEGATION_TOKEN to false
[ https://issues.apache.org/jira/browse/YARN-503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod Kumar Vavilapalli updated YARN-503:
-----------------------------------------
Issue Type: Sub-task (was: Bug)
Parent: YARN-47
> DelegationTokens will be renewed forever if multiple jobs share tokens and the first one sets JOB_CANCEL_DELEGATION_TOKEN to false
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-503
> URL: https://issues.apache.org/jira/browse/YARN-503
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 0.23.3, 3.0.0, 2.0.0-alpha
> Reporter: Siddharth Seth
> Assignee: Daryn Sharp
> Attachments: YARN-503.patch, YARN-503.patch
>
>
> The first Job/App to register a token is the one which DelegationTokenRenewer associates with a a specific Token. An attempt to remove/cancel these shared tokens by subsequent jobs doesn't work - since the JobId will not match.
> As a result, Even if subsequent jobs have MRJobConfig.JOB_CANCEL_DELEGATION_TOKEN set to true - tokens will not be cancelled when those jobs complete.
> Tokens will eventually be removed from the RM / JT when the service that issued them considers them to have expired or via an explicit cancelDelegationTokens call (not implemented yet in 23).
> A side affect of this is that the same delegation token will end up being renewed multiple times (a separate TimerTask for each job which uses the token).
> DelegationTokenRenewer could maintain a reference count/list of jobIds for shared tokens.
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