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https://issues.apache.org/jira/browse/LUCENE-912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12502048
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Doron Cohen commented on LUCENE-912:
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> dismax score calculation isn't incremental... it's all done during the call
> to score()).
> Is there an issue I'm not thinking of?
I was wondering why QueryUtils.checkSkipTo() did not expose that. But this is
because that check skips doc by doc, always to docs found by the tested query.
Enhancing that test reveals that for some scorers, two consecutive calls to
score() return different scores (no next() or skipTo() calls in between).
This seems like a bug.
> DisjunctionMaxScorer.skipTo has bug that keeps it from skipping
> ---------------------------------------------------------------
>
> Key: LUCENE-912
> URL: https://issues.apache.org/jira/browse/LUCENE-912
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1
> Reporter: Hoss Man
> Fix For: 2.2
>
> Attachments: dismax_skipto.patch
>
>
> as reported on the mailing list, DisjunctionMaxScorer.skipTo is broken if
> called before next in some situations...
> http://www.nabble.com/Potential-issue-with-DisjunctionMaxScorer-tf3846366.html#a10894987
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