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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