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https://issues.apache.org/jira/browse/SOLR-13025?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Høydahl updated SOLR-13025:
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Fix Version/s: master (8.0)
> 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
> Assignee: Jan Høydahl
> Priority: Blocker
> Fix For: master (8.0)
>
>
> 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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