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https://issues.apache.org/jira/browse/LUCENE-2617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12901882#action_12901882
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Michael McCandless commented on LUCENE-2617:
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Are we sure that non-existent terms/phrases should contribute to coord? I have
no idea which way is "right" ;) I'm just asking...
bq. Anyone know if null is actually ever returned from Weight.scorer() in 2.9?
Hmm LUCENE-1754 was fixed in 2.9? Didn't in bring allowed null return from
Weight.scorer()?
> coord should still apply to missing terms/clauses
> -------------------------------------------------
>
> Key: LUCENE-2617
> URL: https://issues.apache.org/jira/browse/LUCENE-2617
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 4.0
> Reporter: Yonik Seeley
> Attachments: LUCENE-2617.patch
>
>
> Missing terms in a boolean query "disappear" (i.e. they don't even affect the
> coord factor).
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