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From "Vinod Kumar Vavilapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-165) RM should point tracking URL to RM web page for app when AM fails
Date Wed, 31 Oct 2012 00:56:14 GMT

    [ https://issues.apache.org/jira/browse/YARN-165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13487422#comment-13487422
] 

Vinod Kumar Vavilapalli commented on YARN-165:
----------------------------------------------

Patch looks good. The test too.

Any manual tests you have done? I'd expect:
 - a fresh request to an already dead AM getting directed properly.
 - an existing page may get a 404 but on refresh should redirect properly.
                
> RM should point tracking URL to RM web page for app when AM fails
> -----------------------------------------------------------------
>
>                 Key: YARN-165
>                 URL: https://issues.apache.org/jira/browse/YARN-165
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 2.0.3-alpha, 0.23.5
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>            Priority: Blocker
>         Attachments: YARN-165.patch
>
>
> Currently when an ApplicationMaster fails the ResourceManager is updating the tracking
URL to an empty string, see RMAppAttemptImpl.ContainerFinishedTransition.  Unfortunately when
the client attempts to follow the proxy URL it results in a web page showing an HTTP 500 error
and an ugly backtrace because "http://" isn't a very helpful tracking URL.
> It would be much more helpful if the proxy URL redirected to the RM webapp page for the
specific application.  That page shows the various AM attempts and pointers to their logs
which will be useful for debugging the problems that caused the AM attempts to fail.

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