Hi Giovanni, afaik grouping is not completly working with solr cloud. You maybe could check:
https://issues.apache.org/jira/browse/SOLR-5046 In addition, documents that should be grouped, need to be in the same shard (You can use &router.field=IDCat3 to place all of your documents with the same IDCat3 in the same shard). Maybe someboy else can give some more insight's i am also interested into the topic. Cheers Timo ________________________________________ Von: Giovanni Bricconi [giovanni.bricc...@banzai.it] Gesendet: Donnerstag, 6. November 2014 11:43 An: solr-user Betreff: grouping finds <result name="doclist" numFound="0" Sorry for the basic question q=*:*&fq=-sku:2471834&fq=FiltroDispo:1&fq=has_image:1&rows=100&fl=descCat3,IDCat3,ranking2&group=true&group.field=IDCat3&group.sort=ranking2+desc&group.ngroups=true returns some groups with no results. I'm using solr 4.8.0, the collection has 3 shards Am I missing some parameters? <lst name="grouped"> <lst name="IDCat3"> <int name="matches">297254</int> <int name="ngroups">49</int> <arr name="groups"> <lst> <int name="groupValue">0</int><result name="doclist" numFound="0" start="0"/></lst> ... <lst><int name="groupValue">12043</int><result name="doclist" numFound="2" start="0"><doc><int name="IDCat3">12043</int><str name="descCat3">SSD</str><int name="ranking2">498</int></doc></result></lst>