update no metadata hint
diff --git a/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/controller/ServiceController.java b/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/controller/ServiceController.java
index 8dd6358..1776fb1 100644
--- a/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/controller/ServiceController.java
+++ b/dubbo-admin-backend/src/main/java/org/apache/dubbo/admin/controller/ServiceController.java
@@ -75,11 +75,11 @@
                                                                       info.get(Constants.GROUP_KEY), Constants.PROVIDER_SIDE, application);
         String metadata = providerService.getProviderMetaData(identifier);
         ServiceDetailDTO serviceDetailDTO = new ServiceDetailDTO();
+        serviceDetailDTO.setConsumers(consumers);
+        serviceDetailDTO.setProviders(providers);
         if (metadata != null) {
             Gson gson = new Gson();
             FullServiceDefinition serviceDefinition = gson.fromJson(metadata, FullServiceDefinition.class);
-            serviceDetailDTO.setConsumers(consumers);
-            serviceDetailDTO.setProviders(providers);
             serviceDetailDTO.setMetadata(serviceDefinition);
         }
         return serviceDetailDTO;
diff --git a/dubbo-admin-frontend/src/components/ServiceDetail.vue b/dubbo-admin-frontend/src/components/ServiceDetail.vue
index ebae455..3618c0c 100644
--- a/dubbo-admin-frontend/src/components/ServiceDetail.vue
+++ b/dubbo-admin-frontend/src/components/ServiceDetail.vue
@@ -34,16 +34,16 @@
         </v-data-table>
       </v-flex>
       <v-flex sm12>
-        <h3>Service Info</h3>
+        <h3>{{$t('serviceInfo')}}</h3>
       </v-flex>
       <v-flex lg12 >
         <v-tabs
           class="elevation-1">
           <v-tab>
-            providers
+            {{$t('providers')}}
           </v-tab>
           <v-tab>
-            consumers
+            {{$t('consumers')}}
           </v-tab>
           <v-tab-item>
             <v-data-table
@@ -101,6 +101,12 @@
               <v-chip label>{{props.item.returnType}}</v-chip>
             </td>
           </template>
+          <template slot="no-data">
+            <v-alert :value="true" color="warning" icon="warning">
+              {{$t('noMetadataHint')}}
+              <a :href="$t('configAddress')" target="_blank">{{$t('here')}}</a>
+            </v-alert>
+          </template>
         </v-data-table>
       </v-flex>
     </v-layout>
@@ -148,7 +154,7 @@
               value: 'port'
             },
             {
-              text: this.$t('timeout(ms)'),
+              text: this.$t('timeout'),
               value: 'timeout'
             },
             {
diff --git a/dubbo-admin-frontend/src/lang/en.js b/dubbo-admin-frontend/src/lang/en.js
index 538a666..adc5c74 100644
--- a/dubbo-admin-frontend/src/lang/en.js
+++ b/dubbo-admin-frontend/src/lang/en.js
@@ -27,8 +27,15 @@
   serviceMock: 'Service Mock',
   metrics: 'Metrics',
   group: 'Group',
+  serviceInfo: 'Service Info',
+  providers: 'Providers',
+  consumers: 'Consumers',
   version: 'Version',
   app: 'Application',
+  ip: 'IP',
+  port: 'PORT',
+  timeout: 'timeout(ms)',
+  serialization: 'serialization',
   appName: 'Application Name',
   serviceName: 'Service Name',
   operation: 'Operation',
@@ -65,5 +72,10 @@
   ipSearchHint: 'Find all services provided by the target server on the specified IP address',
   appSearchHint: 'Input an application name to find all services provided by one particular application, * for all',
   searchTagRule: 'Search Tag Rule by application name',
-  searchBalanceRule: 'Search Balancing Rule'
+  searchBalanceRule: 'Search Balancing Rule',
+  noMetadataHint: 'There is no metadata available, please update to Dubbo2.7, or check your config center configuration in application.properties, please check ',
+  parameterList: 'parameterList',
+  returnType: 'returnType',
+  here: 'here',
+  configAddress: 'https://github.com/apache/incubator-dubbo-ops/wiki/Dubbo-Admin-configuration'
 }
diff --git a/dubbo-admin-frontend/src/lang/zh.js b/dubbo-admin-frontend/src/lang/zh.js
index dd2ff14..905896a 100644
--- a/dubbo-admin-frontend/src/lang/zh.js
+++ b/dubbo-admin-frontend/src/lang/zh.js
@@ -25,10 +25,17 @@
   loadBalance: '负载均衡',
   serviceTest: '服务测试',
   serviceMock: '服务Mock',
+  providers: '提供者',
+  consumers: '消费者',
   metrics: '统计',
   group: '组',
   version: '版本',
   app: '应用',
+  ip: 'IP地址',
+  serviceInfo: '服务信息',
+  port: '端口',
+  timeout: '超时(毫秒)',
+  serialization: '序列化',
   appName: '应用名',
   serviceName: '服务名',
   operation: '操作',
@@ -65,5 +72,10 @@
   ipSearchHint: '在指定的IP地址上查找目标服务器提供的所有服务',
   appSearchHint: '输入应用名称以查找由一个特定应用提供的所有服务, * 代表所有',
   searchTagRule: '根据应用名搜索标签规则',
-  searchBalanceRule: '搜索负载均衡规则'
+  searchBalanceRule: '搜索负载均衡规则',
+  parameterList: '参数列表',
+  returnType: '返回值',
+  noMetadataHint: '无元数据信息,请升级至Dubbo2.7及以上版本,或者查看application.properties中关于config center的配置,详见',
+  here: '这里',
+  configAddress: 'https://github.com/apache/incubator-dubbo-ops/wiki/Dubbo-Admin%E9%85%8D%E7%BD%AE%E8%AF%B4%E6%98%8E'
 }