steveloughran commented on issue #1857: HADOOP-16878. Copy command in FileUtil to throw an exception if the source and destination is the same URL: https://github.com/apache/hadoop/pull/1857#issuecomment-606824811 findbugs unhappy ``` Nullcheck of src at line 400 of value previously dereferenced in org.apache.hadoop.fs.FileUtil.copy(FileSystem, FileStatus, FileSystem, Path, boolean, boolean, Configuration) At FileUtil.java:400 of value previously dereferenced in org.apache.hadoop.fs.FileUtil.copy(FileSystem, FileStatus, FileSystem, Path, boolean, boolean, Configuration) At FileUtil.java:[line 400] ```
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