DefaultSimilarity.queryNorm() should never return Infinity
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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
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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