I have two services "product-service" and "rating-service". I am making a rest call from product-service to rating-service to get the data. I have written the Retry configuration in product-service and expecting whenever an exception raised from rating-service, product-service retry the rest call as per configuration. But it is not happening. Whenever an exception thrown from rating-service, product-service also throws the exception without retrying and also fallback. Please find below code of both the services. Check the code of the both services here.

product-service >> ProductServiceImpl.java

    @Retry(name = "rating-service", fallbackMethod = "getDefaultProductRating")
    public List<ProductRatingDTO> getProductRating(String id) {
        String reqRatingServiceUrl = ratingServiceUrl + "/" + id;
        log.info("Making a request to " + reqRatingServiceUrl + " at :" + LocalDateTime.now());
        ResponseEntity<List<ProductRatingDTO>> productRatingDTOListRE = restTemplate.exchange(reqRatingServiceUrl,
                HttpMethod.GET, null, new ParameterizedTypeReference<List<ProductRatingDTO>>() {
                });
        List<ProductRatingDTO> productRatingDTOList = productRatingDTOListRE.getBody();
        log.info("Retrieved rating for id {} are: {}", id, productRatingDTOList);
        return productRatingDTOList;
    }

    public List<ProductRatingDTO> getDefaultProductRating(String id, Exception ex) {
        log.warn("fallback method: " + ex.getMessage());
        return new ArrayList<>();
    }

product-service >> application.yml

resilience4j.retry:
  instances:
    rating-service:
      maxAttempts: 3
      waitDuration: 10s
      retryExceptions:
        - org.springframework.web.client.HttpServerErrorException
      ignoreExceptions:
        - java.lang.ArrayIndexOutOfBoundsException

rating-service >> RatingsServiceImpl.java

    @Override
    public List<RatingsDTO> getRatings(String productId) {
        log.info("Ratings required for product id: "+productId);
        List<RatingsDTO> ratingsDTOList = ratingsRepository.getRatingsByProductId(productId);
        log.info("Ratings fetched for product id {} are : {}",productId,ratingsDTOList);
        if (ThreadLocalRandom.current().nextInt(0,5) == 0){ // Erratic block
            log.error("Erratic");
            throw new org.springframework.web.client.HttpServerErrorException(HttpStatus.INTERNAL_SERVER_ERROR);
        }
        return ratingsDTOList;
    }

Please let me know where I am doing the mistake?