Jobs using the combiner and flatten of group keys produce wrong results
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Key: PIG-110
URL: https://issues.apache.org/jira/browse/PIG-110
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: 0.0.0
Reporter: Alan Gates
Assignee: Antonio Magnaghi
A job such as the following:
a = load 'mydata';
b = group a by ($0, $1);
c = foreach b generate flatten(group), COUNT($1)
currently produces wrong results. Instead of returning the count in the 3rd
column, it returns a repeat of the value in the second column. If the combiner
is forced off, this does not occur, so I assume this is in the combiner logic
somewhere.
This bug was introduced in revision 617338 (the checkin for PIG-32).
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