Yongjun Zhang created HDFS-10376:
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             Summary: setOwner call is not run as the specified user in 
TestPermission
                 Key: HDFS-10376
                 URL: https://issues.apache.org/jira/browse/HDFS-10376
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Yongjun Zhang


TestPermission create a user with the following name and group:

{code}
 final private static String USER_NAME = "user" + RAN.nextInt();
 final private static String[] GROUP_NAMES = {"group1", "group2"};

   UserGroupInformation userGroupInfo = 
        UserGroupInformation.createUserForTesting(USER_NAME, GROUP_NAMES );
      
      FileSystem userfs = DFSTestUtil.getFileSystemAs(userGroupInfo, conf);

      // make sure mkdir of a existing directory that is not owned by 
      // this user does not throw an exception.
      userfs.mkdirs(CHILD_DIR1);
      
{code}

Supposedly 

{code}
 userfs.setOwner(CHILD_FILE3, "foo", "bar");
{code}
will be run as the specified user, but it seems to be run as me who run the 
test.

Running as the specified user would disallow setOwner, which requires superuser 
privilege. This is not happening.

Creating this jira for some investigation to understand whether it's indeed an 
issue.

Thanks.






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