From 3f2e0e18c96a48af66896a1a76abfabb70c7b034 Mon Sep 17 00:00:00 2001
From: huazhongming <crazyhzm@gmail.com>
Date: Tue, 5 Mar 2024 09:46:25 +0800
Subject: [PATCH] Fix AotUtils NPE (#13825)

Signed-off-by: crazyhzm <crazyhzm@gmail.com>
---
 .../java/org/apache/dubbo/config/spring6/utils/AotUtils.java  | 4 +++-
 .../org/apache/dubbo/config/spring6/utils/DemoService.java    | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/dubbo-config/dubbo-config-spring6/src/main/java/org/apache/dubbo/config/spring6/utils/AotUtils.java b/dubbo-config/dubbo-config-spring6/src/main/java/org/apache/dubbo/config/spring6/utils/AotUtils.java
index c96d4c33c8..8dc16bf9c9 100644
--- a/dubbo-config/dubbo-config-spring6/src/main/java/org/apache/dubbo/config/spring6/utils/AotUtils.java
+++ b/dubbo-config/dubbo-config-spring6/src/main/java/org/apache/dubbo/config/spring6/utils/AotUtils.java
@@ -59,7 +59,9 @@ public class AotUtils {
                     }
                 }));
 
-                registerSerializationType(registerType.getSuperclass(), hints, serializationTypeCache);
+                if (registerType.getSuperclass() != null) {
+                    registerSerializationType(registerType.getSuperclass(), hints, serializationTypeCache);
+                }
             }
         }
     }
diff --git a/dubbo-config/dubbo-config-spring6/src/test/java/org/apache/dubbo/config/spring6/utils/DemoService.java b/dubbo-config/dubbo-config-spring6/src/test/java/org/apache/dubbo/config/spring6/utils/DemoService.java
index 73e9541e90..b506431084 100644
--- a/dubbo-config/dubbo-config-spring6/src/test/java/org/apache/dubbo/config/spring6/utils/DemoService.java
+++ b/dubbo-config/dubbo-config-spring6/src/test/java/org/apache/dubbo/config/spring6/utils/DemoService.java
@@ -19,4 +19,6 @@ package org.apache.dubbo.config.spring6.utils;
 public interface DemoService {
 
     HelloResponse sayHello(HelloRequest request);
+
+    String sayHelloForSerializable(java.io.Serializable name);
 }