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Posted to dev@lucene.apache.org by "Robert Muir (JIRA)" <ji...@apache.org> on 2013/04/15 23:56:16 UTC

[jira] [Created] (LUCENE-4935) CustomScoreQuery has broken boosting

Robert Muir created LUCENE-4935:
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             Summary: CustomScoreQuery has broken boosting
                 Key: LUCENE-4935
                 URL: https://issues.apache.org/jira/browse/LUCENE-4935
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/query/scoring
            Reporter: Robert Muir


CustomScoreQuery wrongly applies boost^2 instead of boost.

It wrongly incorporates its boost into the normalization factor passed down to subquery (like booleanquery does) and *also* multiplies it directly in its scorer.

The only reason the test passes today is because it compares raw score magnitudes when querynorm is on, which normalizes this away.

Changing the test to use newSearcher() demonstrates the brokenness.

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