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https://issues.apache.org/jira/browse/HDFS-15862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhengxi Li updated HDFS-15862:
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Attachment: HDFS-15862.001.patch
> 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
> Priority: Minor
> Attachments: HDFS-15862.001.patch
>
> Time Spent: 10m
>
> 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.
>
> Link to PR: https://github.com/apache/hadoop/pull/2724
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