The min neccessary java version use to be specified in the README, i'm not sure when/why it was removed.
You can now find it in the "System Requirements" page of the ref-guide... https://solr.apache.org/guide/solr/latest/deployment-guide/system-requirements.html : Date: Thu, 13 Apr 2023 10:49:20 +0200 : From: Dominique Bejean <dominique.bej...@eolya.fr> : Reply-To: users@solr.apache.org : To: solr-user <solr-u...@lucene.apache.org> : Subject: SolrJ 9.2 and Java version : : Hi, : : I don't find in documentation which minimal version is required for SolrJ : 9.2. JAva 11 and 17 are supported for sure, but is Java 1.8 still possible ? : : Regards : : Dominique : -Hoss http://www.lucidworks.com/