I’ve merged java 11 upgrade PR(#6424) today. So recommended to upgrade to java 11 for dev. Right now we still need to support java8 compilation for existing users to upgrade, so don’t use java11 code features until further notice when we drop the java 8 support. For devs still on java8, please use below command to build your project.

mvn clean install -DskipTests -Pbin-dist -T 4  -Djdk.version=8

Thanks a lot to @User for making this happen!