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https://issues.apache.org/jira/browse/HDFS-538?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jakob Homan updated HDFS-538:
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Release Note: FileSystem.listStatus() previously returned null for empty or
nonexistent directories; will now return empty array for empty directories and
throw FileNotFoundException for non-existent directory. Client code should be
updated for new semantics. (was: FileSystem.listStatus() previously returned
null for empty or nonexistent directories. It has been changed to throw
FileNotFoundException if the directory does not exist and to return an empty
array if the directory is empty.)
> DistributedFileSystem::listStatus incorrectly returns null for empty result
> sets
> --------------------------------------------------------------------------------
>
> Key: HDFS-538
> URL: https://issues.apache.org/jira/browse/HDFS-538
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Jakob Homan
> Assignee: Jakob Homan
> Fix For: 0.21.0
>
> Attachments: HDFS-538.patch
>
>
> Currently the listStatus method returns null if no files match the request.
> This differs from the Checksum/LocalFileSystem implementation, which returns
> an empty array, and the nontvery-explict prescription of the FileSystem
> interface: "{...@return the statuses of the files/directories in the given
> patch}}" It's better to return an empty collection than have to add extra
> null checks. The method should return an empty array.
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