org.apache.tomcat.websocket.Util.getCloseCode() converts codes between 3000 and 4999 to 1000. This behaviour is non-standard and differs from the behaviour of javax.websocket.CloseReason$CloseCodes which returns the correct close codes.


            return new CloseReason.CloseCode() {
                @Override
                public int getCode() {
                    return code;
                }
            };