Hi, Last week I brought down one of our Yarn nodes because of this problem: https://issues.apache.org/jira/browse/FLINK-4485
The Yarn node no longer accepted any Flink/Yarn jobs until we stopped the jobmaster. I classified this as a 'blocker' because it makes the yarn-session very short lived (about 50 jobs on our cluster). -- Best regards / Met vriendelijke groeten, Niels Basjes