Single server.  Localhost.  I am using the simple setup and took all the 
defaults.



-----Original Message-----
From: Shawn Heisey <apa...@elyograg.org> 
Sent: Thursday, August 30, 2018 11:14 AM
To: solr-user@lucene.apache.org
Subject: [EXTERNAL] - Re: join works with a core, doesn't work with a collection

On 8/30/2018 9:00 AM, Steve Pruitt wrote:
> Is there something different I need to do for a query with a join for a 
> Collection?  Singular Collection, not across Collections.
>
> Initially, I used a Core for simple development.  One of my queries uses a 
> join.  It works fine.

I know very little about using the join feature. Everything that I know about 
it has been picked up by reading this mailing list.

I think one of the key elements is that all of the indexes involved in a join 
must exist on the same server.  It is quite common with a SolrCloud setup to 
have the data spread across multiple servers, especially when collections have 
multiple shards.

I do not know whether you're having a problem because of having your collection 
spread across multiple servers or not, but it does seem to be a likely 
possibility.

Thanks,
Shawn

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