Flux of Mono ResponseSpec (webclient .retrieve) .OnErrorResume unusefull to substitute with a correct Mono when return Mono.error()

[skyblackhawk]

	@Override
	public Flux<?> getRatesFlux(String logHash, String apiUrl) {
		return ratesReactiveRepository
				.findAll()
				.flatMap(rate -> {
					log.info("{} rate read from MongoDb: {}", logHash, rate);
					String url = apiUrl + "/" + rate.getRateName();
					log.debug("{}, START {} URI: {}",
							logHash,
							"controller.ratesServiceImpl.getRatesFlux",
							url);
					return webClient
							.post()
							.uri(url)
							.accept(MediaType.APPLICATION_JSON)
							.retrieve()
							.onStatus(	HttpStatusCode::is5xxServerError,
										clientResponse -> Mono.error("INTERNAL SERVER ERROR for rate " + rate))
							.onStatus(	HttpStatusCode::is4xxClientError,
										clientResponse -> Mono.error("EMPTY for rate " + rate))
							.bodyToMono(ContentFragmentMainEntity.class);
				});
	}

Below service is called from controller:
		return aemRatesService
				.getRatesFlux(logHash, apiUrl)
				.onErrorContinue((err, i) -> log.error("ERROR LOAD SOME RATE VERIFY LOG"))
				.flatMap(response -> {
					log.info("OK LOAD " + response.getCodice());
					return Mono.just("SUCCESS LOAD RATE " + response.getCodice());
				})
				.collectList();

I tried to use .OnErrorResume but block flow return a single value not continue and in this implementation not continue stop after a 505 INTERNAL SERVER ERROR.

How can manage in a Flux a Mono.error to return a Mono.just object and continue in asyncronous flatmap?

Thanks a lot for your support.