#vulnerable code 
                             @Override
	public Flux<Payload> requestStream(Payload payload) {
		List<String> metadata = getRoutingMetadata(payload);
		RSocket service = findRSocket(metadata);

		if (service != null) {
			return service.requestStream(payload);
		}

		MonoProcessor<RSocket> processor = MonoProcessor.create();
		this.registry.pendingRequest(metadata, processor);

		return processor
				.log("pending-request")
				.flatMapMany(rSocket -> rSocket.requestStream(payload));
	} 
                            #location 11 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Override
	public Flux<Payload> requestStream(Payload payload) {
		RSocket service = findRSocket(payload);
		return service.requestStream(payload);
	}