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https://issues.apache.org/jira/browse/YARN-3967?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14641624#comment-14641624
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Hudson commented on YARN-3967:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #256 (See 
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/256/])
YARN-3967. Fetch the application report from the AHS if the RM does not (xgong: 
rev fbd6063269221ec25834684477f434e19f0b66af)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/main/java/org/apache/hadoop/yarn/server/webproxy/AppReportFetcher.java
* hadoop-yarn-project/CHANGES.txt
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-web-proxy/src/test/java/org/apache/hadoop/yarn/server/webproxy/TestAppReportFetcher.java


> 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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