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From "Mit Desai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3967) Fetch the application report from the AHS if the RM does not know about it
Date Fri, 24 Jul 2015 20:46:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641046#comment-14641046
] 

Mit Desai commented on YARN-3967:
---------------------------------

Agreed. We should make the change in at both places than. I'll file a Jira for that as well.

> Fetch the application report from the AHS if the RM does not know about it
> --------------------------------------------------------------------------
>
>                 Key: YARN-3967
>                 URL: https://issues.apache.org/jira/browse/YARN-3967
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.1
>            Reporter: Mit Desai
>            Assignee: Mit Desai
>             Fix For: 2.7.2
>
>         Attachments: YARN-3967.1.patch, YARN-3967.2.patch, YARN-3967.3.patch
>
>
> If the application history service has been enabled and RM has forgotten anout an application,
try and fetch the app report form the AHS.
> On larger clusters, the RM can forget about the applications in about 30 minutes. The
proxy url generated during the job submission will try to fetch the app report from the RM
and will fail to get anything from there. If the app is not found in the RM, we will need
to get the application report from the Application History Server  (if it is enabled) to see
if we can get any information on that application before throwing an exception.



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