Is this a sharded collection? group.ngroups isn't supported (see the docs, "group.ngroups and group.facet require that all documents in each group must be co-located on the same shard") in sharded situations so it's not surprising that the results differ.
Best, Erick On Thu, Sep 7, 2017 at 10:35 AM, Ray Niu <newry1...@gmail.com> wrote: > Hello: > I tried to use Collapsing Query Parser per following link: > > https://cwiki.apache.org/confluence/display/solr/Collapse+and+Expand+Results > here is the query I am using > http://<host_name>/solr/collection/select?q=groupId:*& > fl=id,groupId,date&fq=%7B!collapse%20field=groupId%20sort=%27id%20asc%27%7D& > expand=true&expand.rows=3&sort=date%20asc&expand.sort=id%20asc&rows=3 > > but I found the result is different from group query: > http://<host_name>/solr/collection/select?q=groupId:*& > fl=id,date,groupId&group=true&group.field=groupId&group. > limit=4&group.ngroups=true&sort=date%20asc&group.sort=id%20asc&rows=3 > > it seems sort across collapsed document is not working. > > Can anyone help on this?
