[jira] [Created] (HDFS-17110) Null Pointer Exception when running TestHarFileSystemWithHA#testHarUriWithHaUriWithNoPort

["ConfX (Jira)" <ji...@apache.org>]

ConfX created HDFS-17110:
----------------------------

             Summary:  Null Pointer Exception when running TestHarFileSystemWithHA#testHarUriWithHaUriWithNoPort
                 Key: HDFS-17110
                 URL: https://issues.apache.org/jira/browse/HDFS-17110
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: ConfX
         Attachments: reproduce.sh

h2. What happened

After setting {{{}dfs.namenode.replication.min=12396{}}}, running test {{org.apache.hadoop.hdfs.server.namenode.ha.TestHarFileSystemWithHA#testHarUriWithHaUriWithNoPort}} results in a {{{}NullPointerException{}}}.
h2. Where's the bug

In the test {{{}org.apache.hadoop.hdfs.server.namenode.ha.TestHarFileSystemWithHA#testHarUriWithHaUriWithNoPort{}}}:
{noformat}
    } finally {
      cluster.shutdown();
    }{noformat}
the test tries to shutdown the cluster for cleaning up. However, if the cluster is not generated and cluster=null, the NPE would conceal other failures.
h2. How to reproduce
 # Set {{dfs.namenode.replication.min=12396}}
 # Run {{org.apache.hadoop.hdfs.server.namenode.ha.TestHarFileSystemWithHA#testHarUriWithHaUriWithNoPort}}
and the following exception should be observed:
{noformat}
java.lang.NullPointerException
    at org.apache.hadoop.hdfs.server.namenode.ha.TestHarFileSystemWithHA.testHarUriWithHaUriWithNoPort(TestHarFileSystemWithHA.java:60){noformat}
For an easy reproduction, run the reproduce.sh in the attachment.

We are happy to provide a patch if this issue is confirmed.



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