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https://issues.apache.org/jira/browse/SOLR-16061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17507006#comment-17507006
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Jan Høydahl commented on SOLR-16061:
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In any case, branch_9_0 needs a text in "Major changes in Solr 9.0" stating
that there is a back-compat change wrt Cloud clients, and what steps to take to
upgrade user-application. We cannot really refer to 8.11.2 in the 9.0 release
so it is a bit tricky. But I believe the upgrade-notes is an important
supplement to the Deprecation notice in 8.11.2, so people prepare for the
client upgrade and not face it as a surprise.
Are we aware of any restrictions wrt upgrading user-application-side solrj
before or after upgrading the solr cluster to 9.0? I would guess that Solrj
8.11 works with a 9.0 cluster and also that a 9.0 solrj works with a 8.11
cluster? If that is the case, users have great flexibility in the upgrade
planning.
> Decouple CloudSolrClient from ZkStateReader
> -------------------------------------------
>
> Key: SOLR-16061
> URL: https://issues.apache.org/jira/browse/SOLR-16061
> Project: Solr
> Issue Type: Task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Jan Høydahl
> Priority: Blocker
> Fix For: 9.0
>
> Time Spent: 3h 50m
> Remaining Estimate: 0h
>
> Spinoff from SOLR-15342
> We need to decouple CloudSolrClient from Zookeeper, to prepare for a future
> modularization of solrj. This should be targetet for 9.0.
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