DistributedFileSystem::listStatus incorrectly returns null for empty result sets
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Key: HDFS-538
URL: https://issues.apache.org/jira/browse/HDFS-538
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Jakob Homan
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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