docs: @Override
  	protected List<Instance> getInstancesForApp(String serviceId) throws Exception {
  		List<Instance> instances = new ArrayList<>();
  		log.info("Fetching instances for app: " + serviceId);
  		Application app = eurekaClient.getApplication(serviceId);
  		if (app == null) {
  			log.warn("Eureka returned null for app: " + serviceId);
  			return instances;
  		}
  		try {
  			List<InstanceInfo> instancesForApp = app.getInstances();
  			if (instancesForApp != null) {
  				log.info("Received instance list for app: " + serviceId + ", size="
  						+ instancesForApp.size());
  				for (InstanceInfo iInfo : instancesForApp) {
  					Instance instance = marshall(iInfo);
  					if (instance != null) {
  						instances.add(instance);
  					}
  				}
  			}
  		}
  		catch (Exception e) {
  			log.warn("Failed to retrieve instances from Eureka", e);
  		}
  		return instances;
  	}