diff --git a/dubbo-common/src/main/java/org/apache/dubbo/common/beans/factory/ScopeBeanFactory.java b/dubbo-common/src/main/java/org/apache/dubbo/common/beans/factory/ScopeBeanFactory.java
index 0da12b3893..e57b501316 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/common/beans/factory/ScopeBeanFactory.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/common/beans/factory/ScopeBeanFactory.java
@@ -25,11 +25,13 @@ import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
 import org.apache.dubbo.common.logger.LoggerFactory;
 import org.apache.dubbo.common.resource.Disposable;
 import org.apache.dubbo.common.utils.ConcurrentHashMapUtils;
+import org.apache.dubbo.common.utils.ConcurrentHashSet;
 import org.apache.dubbo.common.utils.StringUtils;
 import org.apache.dubbo.rpc.model.ScopeModelAccessor;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -53,7 +55,7 @@ public class ScopeBeanFactory {
     private final List<BeanInfo> registeredBeanInfos = new CopyOnWriteArrayList<>();
     private InstantiationStrategy instantiationStrategy;
     private final AtomicBoolean destroyed = new AtomicBoolean();
-    private List<Class<?>> registeredClasses = new ArrayList<>();
+    private final Set<Class<?>> registeredClasses = new ConcurrentHashSet<>();
 
     public ScopeBeanFactory(ScopeBeanFactory parent, ExtensionAccessor extensionAccessor) {
         this.parent = parent;
@@ -299,7 +301,7 @@ public class ScopeBeanFactory {
         }
     }
 
-    public List<Class<?>> getRegisteredClasses() {
+    public Set<Class<?>> getRegisteredClasses() {
         return registeredClasses;
     }
 }