diff --git a/client/src/main/java/com/alibaba/nacos/client/naming/core/HostReactor.java b/client/src/main/java/com/alibaba/nacos/client/naming/core/HostReactor.java
index ba5a7a256..3980c8ab6 100644
--- a/client/src/main/java/com/alibaba/nacos/client/naming/core/HostReactor.java
+++ b/client/src/main/java/com/alibaba/nacos/client/naming/core/HostReactor.java
@@ -36,9 +36,9 @@ import static com.alibaba.nacos.client.utils.LogUtils.NAMING_LOGGER;
  */
 public class HostReactor {
 
-    public static final long DEFAULT_DELAY = 1000L;
+    private static final long DEFAULT_DELAY = 1000L;
 
-    public long updateHoldInterval = 5000L;
+    private static final long UPDATE_HOLD_INTERVAL = 5000L;
 
     private final Map<String, ScheduledFuture<?>> futureMap = new HashMap<String, ScheduledFuture<?>>();
 
@@ -234,11 +234,11 @@ public class HostReactor {
 
         } else if (updatingMap.containsKey(serviceName)) {
 
-            if (updateHoldInterval > 0) {
+            if (UPDATE_HOLD_INTERVAL > 0) {
                 // hold a moment waiting for update finish
                 synchronized (serviceObj) {
                     try {
-                        serviceObj.wait(updateHoldInterval);
+                        serviceObj.wait(UPDATE_HOLD_INTERVAL);
                     } catch (InterruptedException e) {
                         NAMING_LOGGER.error("[getServiceInfo] serviceName:" + serviceName + ", clusters:" + clusters, e);
                     }