slfan1989 opened a new pull request, #4428:
URL: https://github.com/apache/hadoop/pull/4428

   JIRA: MAPREDUCE-7387. Fix TestJHSSecurity#testDelegationToken AssertionError 
due to HDFS-16563.
   
   During the processing of 
[HADOOP-18284](https://issues.apache.org/jira/browse/HADOOP-18284). Fix 
Repeated Semicolons., PR#4422 was submitted, and an error was reported in 
hadoop.mapreduce.security.TestJHSSecurity#testDelegationToken in the test 
report.
   
   ```
   [ERROR] 
testDelegationToken(org.apache.hadoop.mapreduce.security.TestJHSSecurity)  Time 
elapsed: 16.344 s  <<< FAILURE!
   java.lang.AssertionError
        at org.junit.Assert.fail(Assert.java:87)
        at org.junit.Assert.assertTrue(Assert.java:42)
        at org.junit.Assert.assertTrue(Assert.java:53)
        at 
org.apache.hadoop.mapreduce.security.TestJHSSecurity.testDelegationToken(TestJHSSecurity.java:163)
   ```
   
   It can be found that 
[HDFS-16563](https://issues.apache.org/jira/browse/HDFS-16563) is causing this 
problem.
   
   The reason is because 
[HDFS-16563](https://issues.apache.org/jira/browse/HDFS-16563) changed error 
msg, which made MR's Jinit Test assertion fail.
   


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