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https://issues.apache.org/jira/browse/HDDS-2112?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HDDS-2112:
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Summary: Ozone rename is behaving different compared with HDFS (was:
rename is behaving different compared with HDFS)
> Ozone rename is behaving different compared with HDFS
> -----------------------------------------------------
>
> Key: HDDS-2112
> URL: https://issues.apache.org/jira/browse/HDDS-2112
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Filesystem
> Reporter: Istvan Fajth
> Priority: Major
> Attachments: demonstrative_test.patch
>
>
> I am attaching a patch file, that introduces two new tests for the
> OzoneFileSystem implementation which demonstrates the expected behaviour.
> Case 1:
> Given a directory a file "/source/subdir/file", and a directory /target
> When fs.rename("/source/subdir/file", "/target/subdir/file") is called
> Then DistributedFileSystem (HDFS), is returning false from the method, while
> OzoneFileSystem throws a FileNotFoundException as "/target/subdir" is not
> existing.
> The expected behaviour would be to return false in this case instead of
> throwing an exception with that behave the same as DistributedFileSystem does.
>
> Case 2:
> Given a directory "/source" and a file "/targetFile"
> When fs.rename("/source", "/targetFile") is called
> Then DistributedFileSystem (HDFS), is returning false from the method, while
> OzoneFileSystem throws a FileAlreadyExistsException as "/targetFile" does
> exist.
> The expected behaviour would be to return false in this case instead of
> throwing an exception with that behave the same as DistributedFileSystem does.
>
> It may be considered as well a bug in HDFS, however it is not clear from the
> FileSystem interface's documentation on the two rename methods that it
> defines in which cases an exception should be thrown and in which cases a
> return false is the expected behaviour.
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