Hi, From this build log <https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2799/4/console> for PR 2799 in branch-3.1, I see there are failures complaining the sun.misc.Cleaner class is not found.
Did we upgrade the JDK version, or any build file for that branch? I can check this later, but it would be great if you can share how to fix it. Thanks,
