#fixed code
                             @Override
	public Mono<Payload> requestResponse(Payload payload) {
		AtomicReference<Timer.Sample> timer = new AtomicReference<>();
		GatewayExchange exchange = createExchange(REQUEST_RESPONSE, payload);
		return findRSocketOrCreatePending(exchange)
				.flatMap(rSocket -> rSocket.requestResponse(payload))
				.doOnSubscribe(s -> timer.set(Timer.start(meterRegistry)))
				.doOnError(t -> count(exchange, "error"))
				.doFinally(s -> timer.get().stop(meterRegistry.timer(getMetricName(exchange), exchange.getTags())));
	}
#vulnerable code 
                             @Override
	public Mono<Payload> requestResponse(Payload payload) {
		AtomicReference<Timer.Sample> timer = new AtomicReference<>();
		GatewayExchange exchange = GatewayExchange.fromPayload(REQUEST_RESPONSE, payload);
		Tags tags = getTags(exchange);
		return findRSocketOrCreatePending(exchange)
				.flatMap(rSocket -> rSocket.requestResponse(payload))
				.doOnSubscribe(s -> timer.set(Timer.start(meterRegistry)))
				.doOnError(t -> count("forward.request.response.error", tags))
				.doFinally(s -> timer.get().stop(meterRegistry.timer("forward.request.response", tags)));
	} 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE