diff --git a/client/src/main/java/com/alibaba/nacos/client/config/http/ServerHttpAgent.java b/client/src/main/java/com/alibaba/nacos/client/config/http/ServerHttpAgent.java
index 7d4a996a1..459d2f4b2 100644
--- a/client/src/main/java/com/alibaba/nacos/client/config/http/ServerHttpAgent.java
+++ b/client/src/main/java/com/alibaba/nacos/client/config/http/ServerHttpAgent.java
@@ -453,6 +453,7 @@ public class ServerHttpAgent implements HttpAgent {
         LOGGER.info("{} do shutdown begin", className);
         ThreadUtils.shutdownThreadPool(executorService, LOGGER);
         ConfigHttpClientManager.getInstance().shutdown();
+        SpasAdapter.freeCredentialInstance();
         LOGGER.info("{} do shutdown stop", className);
     }
     
diff --git a/client/src/main/java/com/alibaba/nacos/client/config/impl/SpasAdapter.java b/client/src/main/java/com/alibaba/nacos/client/config/impl/SpasAdapter.java
index a90694f31..9927d5976 100644
--- a/client/src/main/java/com/alibaba/nacos/client/config/impl/SpasAdapter.java
+++ b/client/src/main/java/com/alibaba/nacos/client/config/impl/SpasAdapter.java
@@ -74,6 +74,10 @@ public class SpasAdapter {
         return CredentialService.getInstance().getCredential().getAccessKey();
     }
     
+    public static void freeCredentialInstance() {
+        CredentialService.freeInstance();
+    }
+    
     /**
      * Sign with hmac SHA1 encrtpt.
      *
diff --git a/client/src/main/java/com/alibaba/nacos/client/identify/CredentialWatcher.java b/client/src/main/java/com/alibaba/nacos/client/identify/CredentialWatcher.java
index 0794c4d71..fad15300a 100644
--- a/client/src/main/java/com/alibaba/nacos/client/identify/CredentialWatcher.java
+++ b/client/src/main/java/com/alibaba/nacos/client/identify/CredentialWatcher.java
@@ -53,7 +53,6 @@ public class CredentialWatcher {
     
     private final ScheduledExecutorService executor;
     
-    @SuppressWarnings("PMD.AvoidUseTimerRule")
     public CredentialWatcher(String appName, CredentialService serviceInstance) {
         this.appName = appName;
         this.serviceInstance = serviceInstance;
diff --git a/client/src/main/java/com/alibaba/nacos/client/naming/net/NamingProxy.java b/client/src/main/java/com/alibaba/nacos/client/naming/net/NamingProxy.java
index 4c99c42c3..3d777d02b 100644
--- a/client/src/main/java/com/alibaba/nacos/client/naming/net/NamingProxy.java
+++ b/client/src/main/java/com/alibaba/nacos/client/naming/net/NamingProxy.java
@@ -719,6 +719,7 @@ public class NamingProxy implements Closeable {
         NAMING_LOGGER.info("{} do shutdown begin", className);
         ThreadUtils.shutdownThreadPool(executorService, NAMING_LOGGER);
         NamingHttpClientManager.getInstance().shutdown();
+        SpasAdapter.freeCredentialInstance();
         NAMING_LOGGER.info("{} do shutdown stop", className);
     }
 }