Version: Solr 4.0 (svn build 30th may, 2012) with Solr Cloud (2 slices and 2 shards)
The setup was done as per the wiki: http://wiki.apache.org/solr/SolrCloud We are doing distributed search. While querying, we use field collapsing with "ngroups" set as true as we need the number of search results. However, there is a difference in the number of "result list" returned and the "ngroups" value returned. Ex: http://localhost:8983/solr/select?q=message:blah%20AND%20userid:3&&group=true&group.field=id&group.ngroups=true The response XMl looks like <response> <script/> <lst name="responseHeader"> <int name="status">0</int> <int name="QTime">46</int> <lst name="params"> <str name="group.field">id</str> <str name="group.ngroups">true</str> <str name="group">true</str> <str name="q">messagebody:monit AND usergroupid:3</str> </lst> </lst> <lst name="grouped"> <lst name="id"> <int name="matches">10</int> <int name="ngroups">9</int> <arr name="groups"> <lst> <str name="groupValue">320043</str> <result name="doclist" numFound="1" start="0"> <doc>...</doc> </result> </lst> <lst> <str name="groupValue">398807</str> <result name="doclist" numFound="5" start="0" maxScore="2.4154348">... </result> </lst> <lst> <str name="groupValue">346878</str> <result name="doclist" numFound="2" start="0">...</result> </lst> <lst> <str name="groupValue">346880</str> <result name="doclist" numFound="2" start="0">...</result> </lst> </arr> </lst> </lst> </response> So you can see that the ngroups value returned is 9 and the actual number of groups returned is 4 Why do we have this discrepancy in the ngroups, matches and actual number of groups. Is this an open issue ? Any kind of help is appreciated. -- Regards, Nitesh Nandy
