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From "Davis, Daniel (NIH/NLM) [C]" <daniel.da...@nih.gov>
Subject RE: Ping handler in SolrCloud mode
Date Wed, 16 Mar 2016 16:18:54 GMT
Shawn Heisey wrote:
> On 3/16/2016 10:11 AM, Tom Evans wrote:
> > This worked, I would still be interested in a lighter-weight approach 
> > that doesn't involve joins to see if a given collection has a shard on 
> > this server. I suspect that might require a custom ping handler plugin 
> > however.
> 
> If you are doing joins, then from what I understand, every node is going to 
> need a replica of every shard, because joins must operate entirely on a single server.
> I have never used joins, but I believe this is one of the feature's limitations.  This
might 
> explain what I was saying in my previous reply.

This appears to be SOLR-7090, e.g. https://issues.apache.org/jira/browse/SOLR-7090.
I'm not sure whether any of the patches there (or in related issues) would work for you, however.
Certainly, replicating more broadly seems the simplest solution.
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