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From "Thierry Granger (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5061) MultipleInputs can not manage path with glob characters like {a,b}
Date Wed, 13 Mar 2013 04:16:12 GMT
Thierry Granger created MAPREDUCE-5061:

             Summary: 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


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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