Sounds like a mismatch in the way the BooleanQuery explanation generation code is handling situations where there is/isn't a coord factor involved in computing the score itself. (the bug is almost certainly in the "explain" code, since that is less rigorously tested in most cases, and the score itself is probably correct)
I tried to trivially reproduce the symptoms you described using the techproducts example and was unable to generate a discrepency using a simple boolean query w/a fuzzy clause... http://localhost:8983/solr/techproducts/query?q=ipod~%20belkin&fl=id,name,score&debug=query&debug=results&debug.explain.structured=true ...can you distill one of your problematic queries down to a shorter/simpler reproducible example, and/or provide us with the field & fieldType details for all of the fields used in your example? (i'm guessing it probably relates to your firstName_phonetic field?) : Date: Tue, 15 Mar 2016 13:17:04 -0700 : From: Rick Sullivan <r...@ricksullivan.net> : Reply-To: solr-user@lucene.apache.org : To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org> : Subject: RE: Solr debug 'explain' values differ from the Solr score : : After some digging and experimentation, here are some more details on the issue I'm seeing. : : : 1. The adjusted documents' scores are always exactly (debug_score/N), where N is the number of OR items in the query. : : For example, `&q=firstName:gabby~ firstName_phonetic:gabby firstName_tokens:(gabby)` will result in some of the documents with firstName==GABBY receiving a score 1/3 of the score of other GABBY documents, even though the debug explanation shows that they generated the same score. : : : 2. This doesn't appear to be a brand new issue, or an issue with SolrCloud. : : I've tested the problem using SolrCloud 5.5.0, Solr 5.5.0 (not cloud), and Solr 5.4.1. : : : Anyone have any ideas? : : Thanks, : -Rick : : From: r...@ricksullivan.net : To: solr-user@lucene.apache.org : Subject: Solr debug 'explain' values differ from the Solr score : Date: Thu, 10 Mar 2016 08:34:30 -0800 : : Hi, : : I'm seeing behavior in Solr 5.5.0 where the top-level values I see in the debug response don't always correspond with the scores Solr assigns to the matched documents. : : For example, here is the top-level debug information for two documents matched by a query: : : 114628: Object : description: "sum of:" : details: Array[2] : match: true : value: 20.542768 : : 357547: Object : description: "sum of:" : details: Array[2] : match: true : value: 26.517654 : : But they have scores : : 114628: 20.542767 : 357547: 13.258826 : : I expect the second document to be the most relevant for my query, and the debug values seem to agree. However, in the final score I receive, that document's score has been adjusted down. : : The relevant debug response information can be found here: http://apaste.info/mju : : Does anyone have an idea why the Solr score may differ from the debug value? : : Thanks, : -Rick -Hoss http://www.lucidworks.com/
