private int getStatusCode(final HttpServletResponse response) {
        try {
            return response.getStatus();
        } catch (Exception ignored) {
        }
        return 0;
    }
@author Chaein Jung
@author jaehong.kim
agent-module/plugins/jetty/src/main/java/com/navercorp/pinpoint/plugin/jetty/javax/interceptor/AbstractServerHandleInterceptor.java