CollapsingQParserPlugin scores incorrectly in Solr 4.6.0 when multiple sort criteria are used

[Umesh Prasad]

Hi All,
    I am using new CollapsingQParserPlugin for Grouping and found that it
works incorrectly when I use multiple sort criteria.


http://localhost:8080/solr/toys/select/?q=car%20and%20toys&version=2.2&start=0&rows=10&indent=on&sort=score%20desc,floSalesRank%20asc&facet=on&facet.field=store_path&facet.mincount=1&bq=store_path:%22mgl/ksc/gcv%22
^100000&wt=json&fl=score,floSalesRank,[docid]&bq=id:STFDCHZM3552AHXE^10000000&fq={!collapse%20field=item_id}


   - sort: "score desc,floSalesRank asc",
   - fl: "score,floSalesRank,[docid]",
   - start: "0",
   - q: "car and toys",
   - facet.field: "store_path",
   - fq: "{!collapse field=item_id}"


response:

{

   - numFound: 21461,
   - start: 0,
   - maxScore: 4.447499,
   - docs: [
      - {
         - floSalesRank: 0,
         - score: 0.12396862,
         - [docid]: 9703
         },
      - {
      -


I found a bug opened for same
https://issues.apache.org/jira/browse/SOLR-5408 ..


The bug is closed but I am not really sure that it works specially for
Multiple segment parts ..

I am using Solr 4.6.0 and my index contains 4 segments ..

Have anyone else faced the same issue ?

---
Thanks & Regards
Umesh Prasad