com.alibaba.dubbo.governance.web.governance.module.screen.Providers#getServiceAppMap 
at line 133 ， should be providers.size > 0 or just delete this comparison cause the next for will skip if proviers.size == 0
* GET /services/$service/providers/$id, show provider details<br>
 * GET /services/$service/providers/$id/edit, show web form for edit provider<br>
 * POST /services/$service/providers/$id, save changes of provider<br>
 * GET /services/$service/providers/$id/delete, delete provider<br>
 * GET /services/$service/providers/$id/tostatic, transfer to static<br>
 * GET /services/$service/providers/$id/todynamic, transfer to dynamic<br>
 * GET /services/$service/providers/$id/enable, enable<br>
 * GET /services/$service/providers/$id/disable, diable<br>
 * GET /services/$service/providers/$id/reconnect, reconnect<br>
 * GET /services/$service/providers/$id/recover, recover<br>
 *
 */
public class Providers extends Restful {
    @Autowired
    private ProviderService providerService;
    @Autowired
    private OverrideService overrideService;
    @Autowired
    private HttpServletResponse response;
    @Autowired
    private HttpServletRequest request;
    public void index(Provider provider, Map<String, Object> context) {
        String service = (String) context.get("service");
        String application = (String) context.get("application");
        String address = (String) context.get("address");
        String value = "";
        String separators = "....";
        List<Provider> providers = null;
        
        if (service != null && service.length() > 0) {