Hi Druids! I've been thinking about what it would take for us to remove support for JDK 8 in the 0.21 release, and officially add support for JDK 11.
I see that unit tests for jdk11 were added about 1+ year ago in Aug 2019 - https://github.com/apache/druid/pull/8400 And integration tests were added ~ 8 months ago in Feb 2020 - https://github.com/apache/druid/pull/9249 Since the jdk11 integration tests were added, I can't remember seeing any tests fail for a jdk11 test, but pass for jdk 8 or vice versa. Given that it's been about 1 year that these tests have been running, is there any opposition to officially removing support for JDK 8 and adding support for JDK 11? There are a few big advantages I can think of for this: 1. Java 8 is end of life, so officially supporting java 11 will allow users to run Druid with at least java 11 which is slotted for support till September 2023 according to https://www.oracle.com/java/technologies/java-se-support-roadmap.html 2. We can reduce our Travis usage by almost half, and lighten the load on ASF's Travis account - today we are the second highest consumer of travis resources by project https://infra-reports.apache.org/cistats/ [image: Screen Shot 2020-11-09 at 2.34.45 PM.png] The only limiting factor I can think of are full scale performance tests that prove there is no major regression in moving from jdk 8 to jdk 11. Are there any other issues that should be considered before adding support for java 11?
