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https://issues.apache.org/jira/browse/MAPREDUCE-5457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sandy Ryza updated MAPREDUCE-5457:
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Summary: Add a KeyOnlyTextOutputFormat to enable streaming to write out
text files without separators (was: Add a KeyOnlyTextOutputFormat to enable
streaming write out text files without separators)
> Add a KeyOnlyTextOutputFormat to enable streaming to write out text files
> without separators
> --------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-5457
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5457
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 2.1.0-beta
> Reporter: Sandy Ryza
>
> MR jobs sometimes want to just output lines of text, not key/value pairs.
> TextOutputFormat handles this by, if a null value is given, outputting only
> the key with no separator. Streaming jobs are unable to take advantage of
> this, because they can't output null values. A text output format that
> ignores values and only outputs keys would allow streaming jobs to output
> lines of text.
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