anshumg commented on a change in pull request #224: URL: https://github.com/apache/solr/pull/224#discussion_r673407575
########## File path: solr/solr-ref-guide/src/major-changes-in-solr-9.adoc ########## @@ -170,6 +170,11 @@ Upgrade is to be done using Collection API MIGRATESTATEFORMAT action using a pre See for example https://solr.apache.org/guide/8_8/cluster-node-management.html#migratestateforma[Solr 8.8 Ref Guide]. // Can't link directly to .adoc file, need to link to 8.something ref guide as MIGRATESTATEFORMAT no longer exists in 9.0. +* If you're using a SolrJ CloudClient to connect to your Solr cluster, you must be using SolrJ version 8.10 or higher (8.x) when upgrading your SolrCloud from 8.x to 9.x. +Otherwise, SolrJ will not be able to connect to the cluster once it has upgraded to Solr 9. +Once you have upgraded all Solr clusters that the client is connecting to, you can upgrade the SolrJ client to 9.x. +However until then, if you have a mix of Solr 9/Solr 8 clusters or nodes within a cluster, you must use SolrJ 8.10 or a higher minor version of 8.x. Review comment: Can we combine this line with the line above : ```If you're using a SolrJ CloudClient to connect to your Solr cluster, you must be using SolrJ version 8.10 or higher (8.x) when upgrading your SolrCloud from 8.x to 9.x.``` I think they say the same thing already :) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@solr.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@solr.apache.org For additional commands, e-mail: issues-h...@solr.apache.org
