DataBufferLimitException: Exceeded limit on max bytes to buffer webflux error

Question

While sending a file I receive an array of bytes. I always have a problem with webflux to receive an array. the error thrown as below :

org.springframework.co         


        

Answer 1

Instead of retrieving data at once, you can stream:

Mono string = webClient.get()
    .uri("end point of an API")
    .retrieve()
    .bodyToFlux(DataBuffer.class)
    .map(buffer -> {
        String string = buffer.toString(Charset.forName("UTF-8"));
        DataBufferUtils.release(buffer);
        return string;
    });

Alternatively convert to stream:

    .map(b -> b.asInputStream(true))
    .reduce(SequenceInputStream::new)
    .map(stream -> {
        // consume stream
        stream.close();
        return string;
    });

In most cases you don't want to really aggregate the stream, rather than processing it directly. The need to load huge amount of data in memory is mostly a sign to change the approach to more reactive one. JSON- and XML-Parsers have streaming interfaces.