The Solr application within Commerce Cloud has undergone significant updates. The default version has been upgraded to Solr 9.5, meaning the existing builds with version 9.2 are unaffected, but it will no longer be selectable for new builds in the Cloud Portal
More importantly, to leverage the latest advancements and security features, we highly recommend upgrading to Solr 9.7, which is officially supported in the 2211.31 release. Upgrading to Solr 9.7 is crucial as it provides the highest security standards and performance enhancements, particularly beneficial for customers managing a large volume of collections. Migrating to this version will require some effort, but the benefits outweigh the transition costs. For more detailed instructions on upgrading to Solr 9.x, visit the Upgrading to Solr 9.x page.