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Bruno P. Kinoshita commented on MAPREDUCE-5911:
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Apologies Ivan, Gera. I hadn't seen 4879 either, and thanks for reverting it Ivan :)
> Terasort TeraOutputFormat does not check for output directory existance
> -----------------------------------------------------------------------
>
> Key: MAPREDUCE-5911
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5911
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: examples
> Reporter: Ivan Mitic
> Assignee: Bruno P. Kinoshita
> Priority: Minor
> Attachments: HADOOP-5911.patch
>
>
> The enforcement that the directory must not yet exist is implemented in {{FileOutputFormat#checkOutputSpecs}}
by throwing {{FileAlreadyExistsException}}. However, terasort uses a specialized output format,
{{TeraOutputFormat}}, which is a subclass of {{FileOutputFormat}}. The subclass overrides
{{checkOutputSpecs}}, but does not re-implement the existence check and throw {{FileAlreadyExistsException}}.
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