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https://issues.apache.org/jira/browse/HADOOP-10375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13975277#comment-13975277
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Steve Loughran commented on HADOOP-10375:
-----------------------------------------
This may depend on Java 7 providing better APIs -a check and fail wouldn't be
atomic
> Local FS doesn't raise an error on mkdir() over a file
> ------------------------------------------------------
>
> Key: HADOOP-10375
> URL: https://issues.apache.org/jira/browse/HADOOP-10375
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
>
> if you mkdir() on a path where there is already a file, the operation does
> not fail. Instead the operation returns 0.
> This is at odds with the behaviour of HDFS.
> HADOOP-6229 add the check for the parent dir not being a file, but something
> similar is needed for the destination dir itself
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