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From "Koji Noguchi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1961) -get, -copyToLocal fail when single filename is passed
Date Thu, 27 Sep 2007 23:33:50 GMT
-get, -copyToLocal fail when  single filename is passed
-------------------------------------------------------

                 Key: HADOOP-1961
                 URL: https://issues.apache.org/jira/browse/HADOOP-1961
             Project: Hadoop
          Issue Type: Bug
          Components: dfs
    Affects Versions: 0.14.1
            Reporter: Koji Noguchi
            Priority: Blocker


In 0.14.1 and in trunk, when I try 

% hadoop dfs -get /user/knoguchi/aaa  aaa

get: Failed to rename tmp file to local destination "aaa".  Remote source file "/user/knoguchi/aaa"
is saved to "/tmp/_copyToLocal_aaa30478".


This works. 

% hadoop dfs -get /user/knoguchi/aaa  ./aaa

or 

% hadoop dfs -get /user/knoguchi/aaa   /home/knoguchi/aaa

My guess. With change in HADOOP-1292, it now creates a tmp file when -copyToLocal.
When destination path is passed without any directory, tmp file is created under '/tmp'. Otherwise,
it uses the same directory as the destination path.

In Java API for File.renameTo, 
http://java.sun.com/javase/6/docs/api/java/io/File.html#renameTo(java.io.File)
it says 
" The rename operation might not be able to move a file from one filesystem to another", 

so renameTo call from /tmp/_tmpfile to /home/knoguchi can fail.

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