Chang Li created YARN-4281:

             Summary: 2.7 RM app page is broken
                 Key: YARN-4281
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Chang Li
            Assignee: Chang Li
             Fix For: 2.7.2

2.7 RM app page is broken by the cherry pick of YARN-3248 on 23/Sep. It broke 
the work around 2.7 patch of YARN-3544 to let it still use container report. 
Currently, our cluster's 2.7 RM app page is completely broken due to 500 error, 
which is caused by when user UGI is null, completed app can not retrieve its 
container report, and in that code path, it doesn't catch 
ContainerNotFoundException, but throw the exception, therefore cause the 500 
 Running app is also broken because of the way it construct containerID by 
{code} "ContainerId.newContainerId(
              appAttemptReport.getApplicationAttemptId(), 1)" 
which will not include epoch number, so it will also get 
ContainerNotFoundException and throw 500 error.
But right now we can use the branch 2 patch for YARN-3544, instead of the work 
around 2.7 patch because branch 2 patch on 2.7 is no longer blocked.

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