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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-285) RM should be able to provide a tracking link for apps that have already been purged
Date Sat, 22 Dec 2012 01:59:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13538644#comment-13538644
] 

Vinod Kumar Vavilapalli commented on YARN-285:
----------------------------------------------

bq. I just committed this to trunk and branch-0.23. Thanks Derek!
Also branch-2.
                
> RM should be able to provide a tracking link for apps that have already been purged
> -----------------------------------------------------------------------------------
>
>                 Key: YARN-285
>                 URL: https://issues.apache.org/jira/browse/YARN-285
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 3.0.0, 0.23.5
>            Reporter: Derek Dagit
>            Assignee: Derek Dagit
>             Fix For: 2.0.3-alpha, 0.23.6
>
>         Attachments: YARN-285-branch-0.23.patch, YARN-285-branch-0.23.patch, YARN-285-branch-0.23.patch,
YARN-285-branch-0.23.patch, YARN-285.patch, YARN-285.patch, YARN-285.patch, YARN-285.patch
>
>
> As applications complete, the RM tracks their IDs in a completed list.  This list is
routinely truncated to limit the total number of application remembered by the RM.
> When a user clicks the History for a job, either the browser is redirected to the application's
tracking link obtained from the stored application instance.  But when the application has
been purged from the RM, an error is displayed.
> In very busy clusters the rate at which applications complete can cause applications
to be purged from the RM's internal list within hours, which breaks the proxy URLs users have
saved for their jobs.
> We would like the RM to provide valid tracking links persist so that users are not frustrated
by broken links.

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