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https://issues.apache.org/jira/browse/LUCENE-4935?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13632273#comment-13632273
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Robert Muir commented on LUCENE-4935:
-------------------------------------
Uwe: yes the bug is in 3.6 too: see CustomWeight's normalize (boost1)
{code}
@Override
public void normalize(float norm) {
norm *= getBoost(); // incorporate boost
subQueryWeight.normalize(norm);
{code}
and CustomScorer.score (boost2)
{code}
return qWeight * provider.customScore(subQueryScorer.docID(),
subQueryScorer.score(), vScores);
{code}
> 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
> Attachments: LUCENE-4935.patch
>
>
> 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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