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From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CRUNCH-167) Sort.sortTuples and related methods write out duplicate values
Date Fri, 22 Feb 2013 06:56:12 GMT
Josh Wills created CRUNCH-167:
---------------------------------

             Summary: Sort.sortTuples and related methods write out duplicate values
                 Key: CRUNCH-167
                 URL: https://issues.apache.org/jira/browse/CRUNCH-167
             Project: Crunch
          Issue Type: Bug
    Affects Versions: 0.4.0, 0.5.0
            Reporter: Josh Wills


I noticed when I was debugging CRUNCH-166 that the strategy that the Sort.sortPairs, sortTrips,
etc. methods are using has the potential to write out duplicate values in cases where we are
only sorting/grouping on a subset of the fields, because all of the records that have the
same value for those sub-fields will be called as part of the same reduce() call, where only
a single one of the records that had the same set of values for those sub-fields will be used
as the key, and the rest of the values will have been thrown away.

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