update

@@ -184,6 +184,13 @@ public class ServTest {
         client= CuratorFrameworkFactory.newClient(CONNECT_STR,retryPolicy);
         if(client==null) return;
         client.start();
+		
+		Runtime.getRuntime().addShutdownHook(new Thread(){
+            public void run() {
+                CloseableUtils.closeQuietly(client);
+            }
+        });
+		
         XServCenter xServCenter=new XServCenter();
         xServCenter.init(client);
         for(int i=0;i<10;i++) {
@@ -201,14 +208,9 @@ public class ServTest {
             xServCenter.getServiceByName("serv_name_1");
             Thread.sleep(500);
         }
-
+		
         Thread.sleep(600000);
-
-        Runtime.getRuntime().addShutdownHook(new Thread(){
-            public void run() {
-                CloseableUtils.closeQuietly(client);
-            }
-        });
+      
     }
 }
 ```