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https://issues.apache.org/jira/browse/HADOOP-9651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13701916#comment-13701916
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Steve Loughran commented on HADOOP-9651:
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Core patch looks good, though you need to make sure that your IDE isn't turning
imports into .* imports -having them leave all imports alone is the best way to
avoid gratuitous diff/merge problems.
I'll add common contract tests for this then merge in the exception
modifications
> Filesystems to throw FileAlreadyExistsException in createFile(path,
> overwrite=false) when the file exists
> ---------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-9651
> URL: https://issues.apache.org/jira/browse/HADOOP-9651
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs
> Affects Versions: 2.1.0-beta
> Reporter: Steve Loughran
> Priority: Minor
> Attachments: HADOOP-9651.patch
>
>
> While HDFS and other filesystems throw a {{FileAlreadyExistsException}} if
> you try to create a file that exists and you have set {{overwrite=false}},
> {{RawLocalFileSystem}} throws a plain {{IOException}}. This makes it
> impossible to distinguish a create operation failing from a fixable problem
> (the file is there) and something more fundamental.
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