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Posted to issues@solr.apache.org by GitBox <gi...@apache.org> on 2021/07/16 20:08:47 UTC
[GitHub] [solr] HoustonPutman opened a new pull request #224: SOLR-15549: Better error message for missing ZK nodes in ZkStateReader.
HoustonPutman opened a new pull request #224:
URL: https://github.com/apache/solr/pull/224
https://issues.apache.org/jira/browse/SOLR-15549
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[GitHub] [solr] HoustonPutman merged pull request #224: SOLR-15549: Better error message for missing ZK nodes in ZkStateReader.
Posted by GitBox <gi...@apache.org>.
HoustonPutman merged pull request #224:
URL: https://github.com/apache/solr/pull/224
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[GitHub] [solr] anshumg commented on a change in pull request #224: SOLR-15549: Better error message for missing ZK nodes in ZkStateReader.
Posted by GitBox <gi...@apache.org>.
anshumg commented on a change in pull request #224:
URL: https://github.com/apache/solr/pull/224#discussion_r673407575
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File path: solr/solr-ref-guide/src/major-changes-in-solr-9.adoc
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@@ -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 :)
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