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https://issues.apache.org/jira/browse/LUCENE-698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12500427
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Doug Cutting commented on LUCENE-698:
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> If boost is zero, then
> sumOfSquaredWeights() returns zero as well, resulting in a
> queryNorm of Infinity (due to a div by zero if DefaultSimilarity is
> used). Then it multiplies boost and queryNorm and 0*Infinity=NaN.
The bug here to me seems that queryNorm is Infinity. A boost of zero has a
reasonable interpretation (don't influence scoring), but I don't see how a
queryNorm of Infinity is ever useful. So perhaps we can remove the NaN by
modifying the default implementation of queryNorm to return 1.0 instead of
Infinity when passed zero. Would that cause any harm?
> FilteredQuery ignores boost
> ---------------------------
>
> Key: LUCENE-698
> URL: https://issues.apache.org/jira/browse/LUCENE-698
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 2.0.0
> Reporter: Yonik Seeley
> Assignee: Michael Busch
> Priority: Minor
> Fix For: 2.2
>
> Attachments: lucene-698.patch
>
>
> Filtered query ignores it's own boost.
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