diff --git a/client/src/main/java/com/alibaba/nacos/client/naming/utils/UtilAndComs.java b/client/src/main/java/com/alibaba/nacos/client/naming/utils/UtilAndComs.java
index 32ff781b1..75a76ae49 100644
--- a/client/src/main/java/com/alibaba/nacos/client/naming/utils/UtilAndComs.java
+++ b/client/src/main/java/com/alibaba/nacos/client/naming/utils/UtilAndComs.java
@@ -58,8 +58,6 @@ public class UtilAndComs {
         .availableProcessors() > 1 ? Runtime.getRuntime().availableProcessors() / 2
         : 1;
 
-    public static final int DEFAULT_RESEND_BEAT_INTERVAL_SECONDS = 2;
-
     public static final String HTTP = "http://";
 
     public static final String HTTPS = "https://";
diff --git a/naming/src/main/java/com/alibaba/nacos/naming/controllers/InstanceController.java b/naming/src/main/java/com/alibaba/nacos/naming/controllers/InstanceController.java
index f2c59dba5..3cd1e9fc9 100644
--- a/naming/src/main/java/com/alibaba/nacos/naming/controllers/InstanceController.java
+++ b/naming/src/main/java/com/alibaba/nacos/naming/controllers/InstanceController.java
@@ -267,9 +267,7 @@ public class InstanceController {
         }
 
         if (clientBeat != null) {
-            if (StringUtils.isBlank(clientBeat.getCluster())) {
-                clientBeat.setCluster(UtilsAndCommons.DEFAULT_CLUSTER_NAME);
-            } else {
+            if (StringUtils.isNotBlank(clientBeat.getCluster())) {
                 clusterName = clientBeat.getCluster();
             }
             ip = clientBeat.getIp();
@@ -311,10 +309,8 @@ public class InstanceController {
             clientBeat.setIp(ip);
             clientBeat.setPort(port);
             clientBeat.setCluster(clusterName);
-            service.processClientBeat(clientBeat);
-        } else {
-            service.processClientBeat(clientBeat);
         }
+        service.processClientBeat(clientBeat);
 
         result.put(CommonParams.CODE, NamingResponseCode.OK);
         result.put("clientBeatInterval", instance.getInstanceHeartBeatInterval());
diff --git a/test/src/test/java/com/alibaba/nacos/test/naming/AutoDeregisterInstance_ITCase.java b/test/src/test/java/com/alibaba/nacos/test/naming/AutoDeregisterInstance_ITCase.java
index 4bbec8e80..55baf0c67 100644
--- a/test/src/test/java/com/alibaba/nacos/test/naming/AutoDeregisterInstance_ITCase.java
+++ b/test/src/test/java/com/alibaba/nacos/test/naming/AutoDeregisterInstance_ITCase.java
@@ -202,8 +202,6 @@ public class AutoDeregisterInstance_ITCase {
 
         String serviceName = randomDomainName();
 
-        System.out.println(serviceName);
-
         naming.registerInstance(serviceName, "127.0.0.1", TEST_PORT, "c1");
         naming.registerInstance(serviceName, "127.0.0.2", TEST_PORT, "c2");
 
diff --git a/test/src/test/java/com/alibaba/nacos/test/naming/ClientBeat_ITCase.java b/test/src/test/java/com/alibaba/nacos/test/naming/ClientBeat_ITCase.java
index 38616c5cc..c2fd56bfe 100644
--- a/test/src/test/java/com/alibaba/nacos/test/naming/ClientBeat_ITCase.java
+++ b/test/src/test/java/com/alibaba/nacos/test/naming/ClientBeat_ITCase.java
@@ -89,7 +89,7 @@ public class ClientBeat_ITCase extends NamingBase {
             }
         }
 
-        // Sleep 30 seconds and see if instance list not changed:
+        // Sleep 35 seconds and see if instance list not changed:
         TimeUnit.SECONDS.sleep(35L);
 
         list = naming.getAllInstances(serviceName);
@@ -114,7 +114,7 @@ public class ClientBeat_ITCase extends NamingBase {
 
         Assert.assertTrue(response.getStatusCode().is2xxSuccessful());
 
-        // Sleep 30 seconds and see if instance list not changed:
+        // Sleep 35 seconds and see if instance list not changed:
         TimeUnit.SECONDS.sleep(35L);
 
         list = naming.getAllInstances(serviceName);