The following test fails in the JDK16 CI:

runtime/logging/RedefineClasses.java

Here's a snippet from the log file:

#section:main
----------messages:(5/453)----------
command: main -Xmx256m -XX:MaxMetaspaceSize=64m -javaagent:redefineagent.jar -XX:+Verbose -Xlog:all=trace:file=all.log RedefineClasses
reason: User specified action: run main/othervm -Xmx256m -XX:MaxMetaspaceSize=64m -javaagent:redefineagent.jar -XX:+Verbose -Xlog:all=trace:file=all.log RedefineClasses
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.compiler,java.instrument
elapsed time (seconds): 0.039
----------configuration:(3/60)----------
Boot Layer
  add modules: java.compiler java.instrument

----------System.out:(0/0)----------
----------System.err:(3/195)----------
Error: VM option 'Verbose' is develop and is available only in debug version of VM.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
----------rerun:(45/5609)*----------