Mostafa Elhemali created HADOOP-9507:
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Summary: LocalFileSystem rename() is broken in some cases when
destination exists
Key: HADOOP-9507
URL: https://issues.apache.org/jira/browse/HADOOP-9507
Project: Hadoop Common
Issue Type: Bug
Components: fs
Affects Versions: 1-win
Reporter: Mostafa Elhemali
Assignee: Mostafa Elhemali
Priority: Minor
In branch-1-win, the rename() method in RawLocalFileSystem uses FileUtil.copy()
without realizing that FileUtil.copy() has a special behavior that if you're
copying /foo to /bar and /bar exists and is a directory, it'll copy /foo inside
/bar instead of overwriting it, which is not what rename() wants. So you end up
with weird behaviors like in this repro:
{code}
c:
cd \
md Foo
md Bar
md Foo\X
md Bar\X
hadoop fs -mv file:///c:/Foo file:///c:/Bar
{code}
At the end of this, you would expect to find only Bar\X, but you instead find
Bar\X\X.
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