We’re still using Solr 8 while we work around some of the removed auto scaling features in Solr 9 and a recent security scanned raised a concern for the 8.x containers. Those are based on Ubuntu 20.04 (via eclipse-temurin:11-jre-focal) which is now in extended support where security updates are only available to paying customers.
It feels like the 8.11.4 images should either be updated or discontinued before a more critical vulnerability is announced. Is there any interest in updating it? Chris