Solr 8.10.0 group.field and sharded servers

[Nate R <na...@gmail.com>]

I have been trying to shard my solr instance over the years to gain
performance. Before we weren't able to because of using ngroups in our top
queries. I coded away from using ngroups so I was hoping that I would be
able to shard my instance and use group.field. Now when I use this
particular param. I get 'org.apache.solr.client.solrj.SolrServerException:
No live SolrServers available to handle this request'. I have tried using
the field as a TEXT, String, and a long. Am I misunderstanding the
caveats to grouping and distributing searches? I also tried to use
collapsing with "{!collapse field=myField_string}" but of course I got
duplicates x the number of shards I have. I have also tore down and
completely reinstated my solr instance.

Following will give me the error. Commenting out the group.field will make
the error go away but of course it does not group.

"group": true,
"group.field": "myField_string"

Is there any way to get unique grouped results while having a distributed
index?

Thanks,

Nate

Re: Solr 8.10.0 group.field and sharded servers

[David Santamauro <da...@gmail.com>]

I’ve run into this. If my memory serves, I believe group.sort must be explicitly given.

From: Nate R <na...@gmail.com>
Date: Monday, October 11, 2021 at 5:41 PM
To: users@solr.apache.org <us...@solr.apache.org>
Subject: Solr 8.10.0 group.field and sharded servers
I have been trying to shard my solr instance over the years to gain
performance. Before we weren't able to because of using ngroups in our top
queries. I coded away from using ngroups so I was hoping that I would be
able to shard my instance and use group.field. Now when I use this
particular param. I get 'org.apache.solr.client.solrj.SolrServerException:
No live SolrServers available to handle this request'. I have tried using
the field as a TEXT, String, and a long. Am I misunderstanding the
caveats to grouping and distributing searches? I also tried to use
collapsing with "{!collapse field=myField_string}" but of course I got
duplicates x the number of shards I have. I have also tore down and
completely reinstated my solr instance.

Following will give me the error. Commenting out the group.field will make
the error go away but of course it does not group.

"group": true,
"group.field": "myField_string"

Is there any way to get unique grouped results while having a distributed
index?

Thanks,

Nate