8213721: [Graal] Tests vmTestbase/nsk/stress/except/except* may be encountering SEGV during out-of-memory conditions Summary: Add the exception handler only for the current thread Reviewed-by: dholmes, sspitsyn, thartmann

8213235: java/nio/channels/SocketChannel/AsyncCloseChannel.java fails with threads that didn't exit Reviewed-by: alanb, dfuchs

8213942: URLStreamHandler initialization race Reviewed-by: alanb, chegar, prappo