I see lots of tests that fail consistently on JDK11. https://ci-hadoop.apache.org/job/hadoop-qbt-trunk-java11-linux-x86_64/160/testReport/
A number of them are YARN tests. I am preparing the 3.3.1 release and in the current state I am not confident in the quality of this release. Please help out! Some failed for Caused by: java.lang.IllegalAccessError: class jdk.internal.reflect.ConstructorAccessorImpl loaded by org.powermock.core.classloader.MockClassLoader @1a3869f4 cannot access jdk/internal/reflect superclass jdk.internal.reflect.MagicAccessorImpl Some failed for java.lang.ClassCastException: class org.apache.hadoop.yarn.client.TestRMFailoverProxyProvider$TestProxy cannot be cast to class org.apache.hadoop.yarn.client.RMProxy (org.apache.hadoop.yarn.client.TestRMFailoverProxyProvider$TestProxy and org.apache.hadoop.yarn.client.RMProxy are in unnamed module of loader 'app')
