Josh Wills created CRUNCH-167:
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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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