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From "Thierry Granger (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5061) MultipleInputs can not manage path with glob characters like {a,b}
Date Wed, 13 Mar 2013 21:52:12 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601707#comment-13601707
] 

Thierry Granger commented on MAPREDUCE-5061:
--------------------------------------------

Maybe = is not a good idea for separator as that would break the backward compatibility, so
a smart regexp seems to be more appropriate. 
                
> MultipleInputs can not manage path with glob characters like {a,b}
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5061
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5061
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Thierry Granger
>            Priority: Minor
>
> Hello,
> The org.apache.hadoop.mapreduce.lib.input.MultipleInputs expects a configuration with
: 
>    * the parameter mapreduce.input.multipleinputs.dir.mappers in the format <path
1>,<mapper class 1>;<path 2>,<mapper class 2>
>    * the parameter mapreduce.input.multipleinputs.dir.formats in the format <path
1>,<input format class 1>;<path 2>,<input format class 2>
> The usage of the comma as separator unable the use of the glob characters {a,b} in the
path (like : hdfs://localhost/user/foo/data201{2,3} ).
> I suggest to change the separator to another non-problematic one (maybe =).
> I patched the MultipleInputs code locally and found an other related issue : 
> when the path are created, the string representing the path is not unescape (like it's
done in the org.apache.hadoop.mapreduce.lib.input.FileInputFormat.getInputPaths method) which
makes an invalid path in case of glob characters {a\,b}
> Thank you

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