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https://issues.apache.org/jira/browse/MAPREDUCE-6750?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15552497#comment-15552497
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Ray Chiang commented on MAPREDUCE-6750:
---------------------------------------

Just adding a note.  Before this fix, the test breaks with the following error:

java.lang.AssertionError: Unexpected exception thrown: 
org.apache.hadoop.security.authorize.AuthorizationException: User: superuser is 
not allowed to impersonate regularUser expected null, but 
was:<org.apache.hadoop.security.authorize.AuthorizationException: User: 
superuser is not allowed to impersonate regularUser>
        at org.junit.Assert.fail(Assert.java:88)
        at org.junit.Assert.failNotNull(Assert.java:664)
        at org.junit.Assert.assertNull(Assert.java:646)
        at 
org.apache.hadoop.mapreduce.v2.hs.server.TestHSAdminServer.testRefreshSuperUserGroups(TestHSAdminServer.java:236)


> TestHSAdminServer.testRefreshSuperUserGroups is failing
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-6750
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6750
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: test
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Minor
>             Fix For: 2.8.0, 3.0.0-alpha1
>
>         Attachments: MAPREDUCE-6750.patch
>
>
> HADOOP-13442 changed {{AccessControlList}} to call {{getGroups()}} instead of 
> {{getGroupNames()}}. It should work if the mocks are updated to stub the 
> right method and return the right type.



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