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From Damien Kamerman <>
Subject Re: backward compatibility of Solr 6.3 version with old Sol4j clients
Date Mon, 06 Feb 2017 02:54:36 GMT
Regarding CloudSolrServer, I tried this briefly and found the client was
only aware of the old shared clusterstate.json.

On 4 February 2017 at 06:23, Shawn Heisey <> wrote:

> On 2/3/2017 10:12 AM, Suresh Pendap wrote:
> > Will Solrj client 4.10.3 version work with Solr 6.3 version of the
> > server? I was trying to look up the documentation but no where the
> > compatibility matrix between server and client is provided. Has some
> > one already used this combination?
> If it's HttpSolrServer (HttpSolrClient in newer versions), chances are
> good that it will work.  The basic http API in Solr does not change
> quickly.  If you run into problems, provide detailed information here or
> on the IRC channel and we'll try to help you work through them.
> I have done quite a bit of version mismatching with the http client.
> Currently I have code with the 6.x client that connects to 4.x, 5.x, and
> 6.x servers.  I have also used older clients with newer servers and had
> no issues.
> If it's CloudSolrServer (CloudSolrClient in newer versions), I wouldn't
> even try to make it work with that wide a version discrepancy.
> SolrCloud has evolved so rapidly over the last couple of years that
> connecting different client and server versions may not work at all.
> For best compatibility, they should be identical versions.  If they
> aren't, SolrJ should be newer than Solr, be from the same major version,
> and not be offset by more than one or two minor releases.
> Thanks,
> Shawn

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