code: private void doFailOverHealthServicesLoad(final String serviceNameToFetch, Exception ex) {
  
          /* If there is a backup provider, load from there. */
          if (backupProvider != null) {
  
              if (debug) logger.debug("ServiceDiscoveryImpl::loadHealthyServices " +
                      "Error while loading healthy" +
                      " services for " + serviceNameToFetch, ex);
  
              final List<EndpointDefinition> healthyServices = backupProvider.loadServices(serviceNameToFetch);
              populateServiceMap(serviceNameToFetch, healthyServices);
              serviceNamesBeingLoaded.remove(serviceNameToFetch);
  
          } else {
  
              logger.error("ServiceDiscoveryImpl::loadHealthyServices " +
                      "Error while loading healthy" +
                      " services for " + serviceNameToFetch, ex);
          }
  
          Sys.sleep(10_000); //primary is down so slow it down so we don't flow the system with updates of service pools.
  
      }
docs: If the primary load failed, we could have a backup provider registered.
  
  @param serviceNameToFetch service pool to fetch
  @param ex