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https://issues.apache.org/jira/browse/LUCENE-2686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148851#comment-13148851
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Simon Willnauer commented on LUCENE-2686:
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mike what is the status of this. are you going to work on this any time soon?
> DisjunctionSumScorer should not call .score on sub scorers until consumer
> calls .score
> --------------------------------------------------------------------------------------
>
> Key: LUCENE-2686
> URL: https://issues.apache.org/jira/browse/LUCENE-2686
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/search
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 3.5, 4.0
>
> Attachments: LUCENE-2686.patch, LUCENE-2686.patch,
> Test2LUCENE2590.java
>
>
> Spinoff from java-user thread "question about Scorer.freq()" from Koji...
> BooleanScorer2 uses DisjunctionSumScorer to score only-SHOULD-clause boolean
> queries.
> But, this scorer does too much work for collectors that never call .score,
> because it scores while it's matching. It should only call .score on the
> subs when the caller calls its .score.
> This also has the side effect of messing up advanced collectors that gather
> the freq() of the subs (using LUCENE-2590).
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