java/nio/channels/DatagramChannel/SelectWhenRefused.java failed once with "Unexpected wakeup"
java.lang.RuntimeException: Unexpected wakeup
at SelectWhenRefused.main(SelectWhenRefused.java:60)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
at java.base/java.lang.Thread.run(Thread.java:1589)