Jesse Daniels created MAHOUT-1622:
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Summary: MultithreadedBatchItemSimilarities outputs incorrect
number of similarities.
Key: MAHOUT-1622
URL: https://issues.apache.org/jira/browse/MAHOUT-1622
Project: Mahout
Issue Type: Bug
Components: Collaborative Filtering
Affects Versions: 0.9
Reporter: Jesse Daniels
Priority: Minor
In some cases the Output class in MultithreadedBatchItemSimilarities does not
output all of the similarity pairs that it should. It is very possible for the
number of active workers to go to zero while in the while loop, in which case
the remaining similarities for the finished workers will not be flushed to the
output. This is because the while loop is only conditioned on whether there are
active workers or not. An easy fix is to also check to make sure the results
structure is not empty. This way both the number of active workers must be 0
and the result set must be empty to exit the while loop.
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