Aihua Xu created HDFS-10385:
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             Summary: LocalFileSystem rename() function should return false 
when destination file exists
                 Key: HDFS-10385
                 URL: https://issues.apache.org/jira/browse/HDFS-10385
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: fs
    Affects Versions: 2.6.0
            Reporter: Aihua Xu


Currently rename() of LocalFileSystem returns true and renames successfully 
when the destination file exists. That seems to have different behavior from 
DFSFileSystem. 

If they can have the same behavior, then we can use one call to do rename 
rather than checking if destination exists and then making rename() call.



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