Zhengxi Li created HDFS-15862:
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Summary: Rename file back to original in
TestViewfsWithNfs3.testNfsRenameSingleNN
Key: HDFS-15862
URL: https://issues.apache.org/jira/browse/HDFS-15862
Project: Hadoop HDFS
Issue Type: Test
Reporter: Zhengxi Li
Assignee: Zhengxi Li
The 'org.apache.hadoop.hdfs.nfs.nfs3.TestViewfsWithNfs3.testNfsRenameSingleNN'
test is not idempotent and fails if run twice in the same JVM, because it
pollutes state shared among tests. It may be good to clean this state pollution
so that some other tests do not fail in the future due to the shared state
polluted by this test.
Running {{TestViewfsWithNfs3.testNfsRenameSingleNN}} twice would result in the
second run failing with a NullPointer exception:
{noformat}
[ERROR] Errors:
[ERROR] TestViewfsWithNfs3.testNfsRenameSingleNN:317 NullPointer
{noformat}
The reason for this is that the {{/user1/renameSingleNN}} file is created in
{{setup()}}, but gets renamed in {{testNfsRenameSingl{{eNN}}}}. When the second
run of {{testNfsRenameSingleNN}} tries to get info of the file by its original
name, it returns a NullPointer since the file no longer exists.
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