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https://issues.apache.org/jira/browse/YARN-3967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14639327#comment-14639327
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Xuan Gong commented on YARN-3967:
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At least for the YARN CLI, i think that right now we have this redirection.
> 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
> Attachments: YARN-3967.1.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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