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From "Mostafa Elhemali (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9507) LocalFileSystem rename() is broken in some cases when destination exists
Date Thu, 25 Apr 2013 21:54:15 GMT
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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