hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (MAPREDUCE-3979) DelegationTokens will be renewed forever if multiple jobs share tokens and the first one sets JOB_CANCEL_DELEGATION_TOKEN to false
Date Thu, 21 Mar 2013 14:49:15 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daryn Sharp reassigned MAPREDUCE-3979:
--------------------------------------

    Assignee: Daryn Sharp
    
> DelegationTokens will be renewed forever if multiple jobs share tokens and the first
one sets JOB_CANCEL_DELEGATION_TOKEN to false
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-3979
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3979
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, resourcemanager
>    Affects Versions: 0.23.0, 1.0.0
>            Reporter: Siddharth Seth
>            Assignee: Daryn Sharp
>
> 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message