Robert Muir created LUCENE-6982:
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Summary: throw IAE on illegal bm25 parameter values
Key: LUCENE-6982
URL: https://issues.apache.org/jira/browse/LUCENE-6982
Project: Lucene - Core
Issue Type: Improvement
Reporter: Robert Muir
Rather than strange behavior, we should throw an exception if these values are
wrong.
This can often detect if the two values got "mixed up", because typical values
of k1 are > 1 (e.g. 1.2, 2.0), but b is only defined between 0 and 1.
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