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https://issues.apache.org/jira/browse/HADOOP-11452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15798534#comment-15798534
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Steve Loughran commented on HADOOP-11452:
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I'm staring at rename/3 right now, and it looks to me that the default
{{rename(file1, file1, Rename.OVERWRITE}} will delete the source file. That is:
there's no check for dest==source before the delete() call is made. Can
someone else look at this to see if I've misread it? If not, well, that's a
serious defect
> Revisit FileSystem.rename(path, path, options)
> ----------------------------------------------
>
> Key: HADOOP-11452
> URL: https://issues.apache.org/jira/browse/HADOOP-11452
> Project: Hadoop Common
> Issue Type: Task
> Components: fs
> Affects Versions: 2.7.3
> Reporter: Yi Liu
> Assignee: Steve Loughran
>
> Currently in {{FileSystem}}, {{rename}} with _Rename options_ is protected
> and with _deprecated_ annotation. And the default implementation is not
> atomic.
> So this method is not able to be used outside. On the other hand, HDFS has a
> good and atomic implementation. (Also an interesting thing in {{DFSClient}},
> the _deprecated_ annotations for these two methods are opposite).
> It makes sense to make public for {{rename}} with _Rename options_, since
> it's atomic for rename+overwrite, also it saves RPC calls if user desires
> rename+overwrite.
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