Dear users of Apache Jackrabbit Oak, Java 8 will be needed for futures versions of Jackrabbit Oak 1.4 and 1.6, starting with Apache Jackrabbit Oak 1.4.27 and 1.6.21.
For details, see https://issues.apache.org/jira/browse/OAK-9294 This change is needed in order to allow upgrading to Apache Solr 8.6.3. Regards, Thomas