[jira] [Commented] (HDFS-8673) HDFS reports file already exists if there is a file/dir name end with ._COPYING_

["Allen Wittenauer (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-8673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602429#comment-14602429 ] 

Allen Wittenauer commented on HDFS-8673:
----------------------------------------

Is this actually a problem in practice?

> HDFS reports file already exists if there is a file/dir name end with ._COPYING_
> --------------------------------------------------------------------------------
>
>                 Key: HDFS-8673
>                 URL: https://issues.apache.org/jira/browse/HDFS-8673
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.7.0
>            Reporter: Chen He
>            Assignee: Chen He
>
> Because CLI is using CommandWithDestination.java which add "._COPYING_" to the tail of file name when it does the copy. It will cause problem if there is a file/dir already called *._COPYING_ on HDFS.
> For file:
> -bash-4.1$ hadoop fs -put 5M /user/occ/
> -bash-4.1$ hadoop fs -mv /user/occ/5M /user/occ/5M._COPYING_
> -bash-4.1$ hadoop fs -ls /user/occ/
> Found 1 items
> -rw-r--r--   1 occ supergroup    5242880 2015-06-26 05:16 /user/occ/5M._COPYING_
> -bash-4.1$ hadoop fs -put 128K /user/occ/5M
> -bash-4.1$ hadoop fs -ls /user/occ/
> Found 1 items
> -rw-r--r--   1 occ supergroup     131072 2015-06-26 05:19 /user/occ/5M
> For dir:
> -bash-4.1$ hadoop fs -mkdir /user/occ/5M._COPYING_
> -bash-4.1$ hadoop fs -ls /user/occ/
> Found 1 items
> drwxr-xr-x   - occ supergroup          0 2015-06-26 05:24 /user/occ/5M._COPYING_
> -bash-4.1$ hadoop fs -put 128K /user/occ/5M
> put: /user/occ/5M._COPYING_ already exists as a directory
> -bash-4.1$ hadoop fs -ls /user/occ/
> (/user/occ/5M._COPYING_ is gone)



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