On Flink 1.17, it’s clear that the minimal supported Hadoop 3 client version is 3.2.3. https://issues.apache.org/jira/browse/FLINK-29710 How about Flink 1.16 or 1.15? Would, say, Hadoop 3.1.1 be compatible? It only mentioned 2.8.5 as the minimal supported version, but not sure if there’s a caveat for Hadoop 3. https://issues.apache.org/jira/browse/FLINK-25224 Thanks

It was 3.1.3 before

Thanks for the quick response! Is this documented anywhere? (just to show my colleagues)

It’s in the PR for the upgrade, see https://github.com/apache/flink/pull/21128

Appreciate it. Thank you!