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https://issues.apache.org/jira/browse/HADOOP-1961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12530919
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rangadi edited comment on HADOOP-1961 at 9/27/07 11:06 PM:
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There are at least three versions of copyToLocal : one in FsShell, one in
ChecksumFileSystem, and FileUtil. All of these implement same logic and
recursion.. but are slightly different. FsShell and ChecksumFS versions in turn
invoke FileUtil version. We should remove FsShell and ChecksumFS, at least in
0.15 or 0.16.
was (Author: rangadi):
Wow there are at least three versions of copyToLocal : one in FsShell, one
in ChecksumFileSystem, and FileUtil. All of these implement essentially same
logic and recursion.. but look different. FsShell and ChecksumFS versions in
turn invoke FileUtil version. We should remove FsShell and ChecksumFS, at least
in 0.15 or 0.16.
> -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
> Assignee: Raghu Angadi
> Priority: Blocker
> Fix For: 0.14.2
>
> Attachments: HADOOP-1961.patch
>
>
> 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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