The master branch now builds and runs with Java 21 out-of-the-box. Notes: - a nightly cron build was set up. - In Java 21 builds, Scala is being bumped to 2.12.18 which causes incompatibilities within Flink; i.e. don't try to load a savepoint from a Java 8/11/17 build - All the tests that are being skipped on Java 11/17 are also skipped on Java 21.
Huge shout-out to everyone participating in review of my Java 21 related PRs If you run into any issues, please report it in FLINK-33163 <https://issues.apache.org/jira/browse/FLINK-33163> . -- Best regards, Sergey