diff --git a/sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/ServiceManager.java b/sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/ServiceManager.java
index cee6e01003..176bee160e 100644
--- a/sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/ServiceManager.java
+++ b/sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/ServiceManager.java
@@ -192,6 +192,7 @@ public BaseService handle(BaseService source, BaseService target) {
      * @param serviceName service name
      */
     protected static void stopService(String serviceName) {
+        System.out.println("shutdown:" + serviceName);
         SERVICES.remove(serviceName).stop();
     }
 
diff --git a/sermant-plugins/sermant-service-registry/spring-cloud-registry-service/src/main/java/io/sermant/registry/service/cache/AddressCache.java b/sermant-plugins/sermant-service-registry/spring-cloud-registry-service/src/main/java/io/sermant/registry/service/cache/AddressCache.java
index e69ceba624..bf9b7317b0 100644
--- a/sermant-plugins/sermant-service-registry/spring-cloud-registry-service/src/main/java/io/sermant/registry/service/cache/AddressCache.java
+++ b/sermant-plugins/sermant-service-registry/spring-cloud-registry-service/src/main/java/io/sermant/registry/service/cache/AddressCache.java
@@ -16,12 +16,16 @@
 
 package io.sermant.registry.service.cache;
 
+import com.alibaba.fastjson.JSONObject;
 import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.RemovalListener;
+import com.google.common.cache.RemovalNotification;
 
 import io.sermant.core.plugin.config.PluginConfigManager;
 import io.sermant.registry.config.GraceConfig;
 
+import java.time.LocalDateTime;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
@@ -43,6 +47,15 @@ public enum AddressCache {
         cache = CacheBuilder.newBuilder()
                 .maximumSize(pluginConfig.getUpstreamAddressMaxSize()) // 设置缓存的最大容量
                 .expireAfterWrite(pluginConfig.getUpstreamAddressExpiredTime(), TimeUnit.SECONDS) // 设置缓存失效时间
+                .removalListener(new RemovalListener<Object, Object>() {
+                    @Override
+                    public void onRemoval(RemovalNotification<Object, Object> notification) {
+                        System.out.println(Thread.currentThread().getName() + LocalDateTime.now() + "remove"
+                                + notification.getKey());
+                        System.out.println(Thread.currentThread().getName() + LocalDateTime.now() + "remove"
+                                + notification.getValue());
+                    }
+                })
                 .build();
     }
 
@@ -52,6 +65,7 @@ public enum AddressCache {
      * @param address Address
      */
     public void addAddress(String address) {
+        System.out.println(Thread.currentThread().getName() + LocalDateTime.now() + "add address: " + address);
         cache.put(address, "");
     }
 
@@ -61,13 +75,18 @@ public void addAddress(String address) {
      * @return Set Address Set
      */
     public Set<String> getAddressSet() {
-        return cache.asMap().keySet();
+        Set<String> strings = cache.asMap().keySet();
+        System.out.println(
+                Thread.currentThread().getName() + LocalDateTime.now() + "getAddressSet: " + JSONObject.toJSONString(
+                        strings));
+        return strings;
     }
 
     /**
      * Clear all caches
      */
     public void cleanCache() {
+        System.out.println(Thread.currentThread().getName() + LocalDateTime.now() + "cleanCache");
         cache.invalidateAll();
     }
 }
\ No newline at end of file