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https://issues.apache.org/jira/browse/MAPREDUCE-2293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer updated MAPREDUCE-2293:
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    Status: Open  (was: Patch Available)

> Enhance MultipleOutputs to allow additional characters in the named output 
> name
> -------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-2293
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2293
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.21.0
>            Reporter: David Rosenstrauch
>            Assignee: Harsh J
>            Priority: Minor
>         Attachments: mapreduce.mo.removecheck.r1.diff, 
> mapreduce.mo.removecheck.r2.diff, mapreduce.mo.removecheck.r3.diff, 
> mapreduce.mo.removecheck.r4.diff, mapreduce.mo.removecheck.r5.diff
>
>
> Currently you are only allowed to use alpha-numeric characters in a named 
> output name in the MultipleOutputs class.  This is a bit of an onerous 
> restriction, as it would be extremely convenient to be able to use non 
> alpha-numerics in the name too.  (E.g., a '.' character would be very 
> helpful, so that you can use the named output name for holding a file 
> name/extension.  Perhaps '-' and a '_' characters as well.)
> The restriction seems to be somewhat arbitrary - it appears to be only 
> enforced in the checkTokenName method.  (Though I don't know if there's any 
> downstream impact by loosening this restriction.)
> Would be extremely helpful/useful to have this fixed though!



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