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https://issues.apache.org/jira/browse/LUCENE-901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-901.
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Resolution: Fixed
Fix Version/s: 3.1
This one is fixed (there is a Nan/Inf check in queryNorm added fairly recently)
> DefaultSimilarity.queryNorm() should never return Infinity
> ----------------------------------------------------------
>
> Key: LUCENE-901
> URL: https://issues.apache.org/jira/browse/LUCENE-901
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Reporter: Michael Busch
> Priority: Trivial
> Fix For: 3.1
>
>
> Currently DefaultSimilarity.queryNorm() returns Infinity if
> sumOfSquaredWeights=0.
> This can result in a score of NaN (e. g. in TermScorer) if boost=0.0f.
> A simple fix would be to return 1.0f in case zero is passed in.
> See LUCENE-698 for discussions about this.
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