How to receive an InputStream as #RequestBody in a #PostMapping method in SpringBoot - spring-boot

Question

I am sending an ArrayList object through WebClient in an HTTP POST request after converting it into an InputStream:
List<MyObject> myObjectList = // some data
ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream();
ObjectOutputStream objectOutStream = new ObjectOutputStream(byteOutStream);
objectOutStream.writeObject(myObjectList );
objectOutStream.flush();
objectOutStream.close();
byte[] byteArray = byteOutStream.toByteArray();
InputStream inputStream = new ByteArrayInputStream(byteArray);
WebClient client = WebClient.builder()
.baseUrl(URL)
.exchangeStrategies(ExchangeStrategies.builder()
.codecs(configure -> configure.defaultCodecs().maxInMemorySize(64 * 1024 * 1024))
.build())
.build();
Mono<HttpStatus> response = client
.post()
.uri(URI)
.header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_OCTET_STREAM_VALUE)
.body(BodyInserters.fromResource(new InputStreamResource(inputStream)))
.exchangeToMono(clientResponse -> Mono.just(clientResponse.statusCode()));
HttpStatus status = response.block();
And at the server side, I am handling this request this way:
#PostMapping(value = "/data", consumes = MediaType.APPLICATION_OCTET_STREAM_VALUE)
public ResponseEntity<Void> saveData(#RequestBody InputStream inputStream) {
try (ObjectInputStream objectInputStream = new ObjectInputStream(inputStream)) {
List<MyObject> myObjectList = (List<MyObject>) objectInputStream.readObject();
LOGGER.info("Payload received : {}", myObjectList);
return new ResponseEntity<>(HttpStatus.OK);
} catch (Exception e) {
LOGGER.error(e.getMessage());
return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
}
}
But after implementing this, I am getting this error:
[org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream;charset=UTF-8' not supported]
PS: I am converting the ArrayList into an InputStream due to it's large size which is causing java.lang.OutOfMemoryError: Direct buffer memory
First, I tried sending the entire List<> in a request but got OutOfMemoryError. Secondly, using the streaming approach I am getting this error
[org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream;charset=UTF-8' not supported]