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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10385) LocalFileSystem rename() function should return false when destination file exists
Date Fri, 13 May 2016 20:13:13 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15283084#comment-15283084
] 

Chris Nauroth commented on HDFS-10385:
--------------------------------------

I'm wary of changing this behavior, especially in branch-2, because of backwards-compatibility
concerns.  Even though the behavior differs from HDFS semantics, applications often have different
expectations of the local file system.  There is a risk that downstream ecosystem components
or user applications will start encountering errors, where previously the same calls to the
local file system succeeded.

> LocalFileSystem rename() function should return false when destination file exists
> ----------------------------------------------------------------------------------
>
>                 Key: HDFS-10385
>                 URL: https://issues.apache.org/jira/browse/HDFS-10385
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.6.0
>            Reporter: Aihua Xu
>            Assignee: Xiaobing Zhou
>
> Currently rename() of LocalFileSystem returns true and renames successfully when the
destination file exists. That seems to have different behavior from DFSFileSystem. 
> If they can have the same behavior, then we can use one call to do rename rather than
checking if destination exists and then making rename() call.



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