While investigating the behaviour of JFR Exception and Error events I produced a small program:

public class ExceptionProducer {

private static Throwable THIS_THROWABLE;

public static void main(String[] args) {
while (true) {
THIS_THROWABLE = new NullPointerException();
THIS_THROWABLE = new InstantiationError();
}
}
}

Doing a small (3 s) recording I get 523072 Java Error events, all stacktraces going from java.lang.Error.<init>() up to ExceptionProducer.main(String[]).

At the same time I get 1569219 Java Exception events:

# events 1st frame 2nd frame 3rd frame
523073 java.lang.Throwable.<init>() java.lang.Exception.<init>() java.lang.RuntimeException.<init>()
523072 java.lang.Throwable.<init>() java.lang.Error.<init>() java.lang.LinkageError.<init>()
523072 java.lang.Error.<init>() java.lang.LinkageError.<init>() java.lang.IncompatibleClassChangeError.<init>()

While it is correct that Java Exception events should be created errors, it seems like every error creation alse creates two JFR events - one from the constructor of java.lang.Throwable and on from the constructor of java.lang.Error.
Are we somehow doing an extra event creation because of the Java Error event creation?