Hi team, Christopher has a suggestion on the Owasp upgrade PR which I think we should discuss here.
TL;DR - Since Owaps requires Java 11 after upgrade, let's bump the minimum required Java version for _BUILDING_ ZooKeeper to 11 across all build profiles. That additional change will allow lots of plugins to be updated that require newer Java versions, but the maven.compiler.release property set to 8 in the ZK pom.xml would still keep ZK compatible with Java 8 at runtime. … I think it's an inconvenience to have two separate minimum versions, depending on which tasks one executes. Also, there are other reasons to standardize on the minimum being JDK11 for everything: • in this case, only OWASP requires a different minimum JDK... but next time, a plugin that is part of the main build might require JDK11. Making JDK11 the minimum for everything would help avoid such problems in the future, • older JDK versions are increasingly harder to acquire in newer operating systems and corporate environments where security policies prevent the use of older software, so fewer people over time are actually building and testing with JDK8; so, continuing to support it is increasingly a waste of effort, • JDK11 has stricter Java 8 compliance enforcement than JDK 8 does, so it's better to build with JDK11 if you want to support JRE8. See the full conversation here: https://github.com/apache/zookeeper/pull/2297 I think this is acceptable, but not sure if it’s worth the effort since we’re going to upgrade to JDK 17 project-wise anyways. Consider that with this change we have to do the following: - modify maven enforcer settings in parent POM, - add documentation changes explaining the situation, - remove JDK8 github actions, - change Apache CI Jenkinsfile and remove JDK 8 builds completely. It’s also true that JDK 17 upgrade is not going to happen tomorrow. Please share your thoughts. Regards, Andor p.s. I don’t find the maven enforcer setting myself which needs to be bumped in parent pom, but if someone can point me to it or even create a PR with the above mentioned changes, I’d much appreciate that.