Hi All, At the moment RankQueries [1] are not supported when you perform grouping: if you perform a ReRankQuery and ask for the groups, reranking will be ignored in the scoring. In SOLR-8776, I added support for ReRankQueries in grouping and I opened a PR on github [2]. ReRankQueries are now supported in standalone and distribute mode, and I changed the logic to rerank groups and not only documents (see the Jira item [3] for more details).
IMO the patch is now quite complete and I've working unit tests, so I was wondering if someone could review it :) Thanks, Diego [1] https://cwiki.apache.org/confluence/display/solr/Query+Re-Ranking [2] https://github.com/apache/lucene-solr/pull/162 [3] https://issues.apache.org/jira/browse/SOLR-8776
