Adrien Grand created SOLR-13025:
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Summary: Replace usage of LegacyBM25Similarity with BM25Similarity
Key: SOLR-13025
URL: https://issues.apache.org/jira/browse/SOLR-13025
Project: Solr
Issue Type: Task
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: master (8.0)
Reporter: Adrien Grand
This is a follow-up of LUCENE-8563: Lucene changed its BM25Similarity
implementation to no longer multiply all scores by (k1 + 1). Solr was left
unchanged by replacing uses of BM25Similarity with LegacyBM25Similarity which
returns the same scores as in 7.x. However it would be nice to switch back to
BM25Similarity, either all the time with a note in the migration guide, or
based on the luceneMatchVersion of the collection.
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