-get, -copyToLocal fail when single filename is passed
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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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