[BUG] Springboot application failing to start due to AppConfigurationRefreshEndpoint final class from azure appconfiguration-web with actuator dependency

[SriPalla]

Describe the bug
Springboot application failing to start due to AppConfigurationRefreshEndpoint final class from azure appconfiguraiton-web when actuator starter is being added to project.

Exception or Stack Trace

2024-05-13 20:46:10,545 INFO - [main] com.demo.DemoApplicationKt:660 : The following 1 profile is active: "local"
2024-05-13 20:46:11,299 WARN - [main] org.springframework.boot.actuate.endpoint.EndpointId:155 : Endpoint ID 'appconfiguration-refresh' contains invalid characters, please migrate to a valid format.
2024-05-13 20:46:11,649 WARN - [main] org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext:632 : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'appConfigurationRefreshEndpoint' defined in class path resource [com/azure/spring/cloud/appconfiguration/config/web/implementation/AppConfigurationWebAutoConfiguration$AppConfigurationPushRefreshConfiguration.class]: Could not generate CGLIB subclass of class com.azure.spring.cloud.appconfiguration.config.web.implementation.pushrefresh.AppConfigurationRefreshEndpoint: Common causes of this problem include using a final class or a non-visible class
2024-05-13 20:46:11,671 ERROR - [main] org.springframework.boot.SpringApplication:851 : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'appConfigurationRefreshEndpoint' defined in class path resource [com/azure/spring/cloud/appconfiguration/config/web/implementation/AppConfigurationWebAutoConfiguration$AppConfigurationPushRefreshConfiguration.class]: Could not generate CGLIB subclass of class com.azure.spring.cloud.appconfiguration.config.web.implementation.pushrefresh.AppConfigurationRefreshEndpoint: Common causes of this problem include using a final class or a non-visible class
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:607)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:325)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:959)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624)
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:334)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343)
at com.demo.DemoApplicationKt.main(DemoApplication.kt:20)
Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class com.azure.spring.cloud.appconfiguration.config.web.implementation.pushrefresh.AppConfigurationRefreshEndpoint: Common causes of this problem include using a final class or a non-visible class
at org.springframework.aop.framework.CglibAopProxy.buildProxy(CglibAopProxy.java:227)
at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:160)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.buildProxy(AbstractAutoProxyCreator.java:517)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:464)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:369)
at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:318)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:438)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1789)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:600)
... 15 more
Caused by: java.lang.IllegalArgumentException: Cannot subclass final class com.azure.spring.cloud.appconfiguration.config.web.implementation.pushrefresh.AppConfigurationRefreshEndpoint
at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:653)
at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:26)
at org.springframework.cglib.core.ClassLoaderAwareGeneratorStrategy.generate(ClassLoaderAwareGeneratorStrategy.java:57)
at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:366)
at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:575)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.lambda$new$1(AbstractClassGenerator.java:107)
at org.springframework.cglib.core.internal.LoadingCache.lambda$createEntry$1(LoadingCache.java:52)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:57)
at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:130)
at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:317)
at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:562)
at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:407)
at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:62)
at org.springframework.aop.framework.CglibAopProxy.buildProxy(CglibAopProxy.java:218)
... 24 more

Process finished with exit code 1

To Reproduce
Adding Springboot actuator along with azure dependencies as listed below
implementation("com.azure.spring:spring-cloud-azure-starter-appconfiguration-config-web")
implementation("com.azure.spring:spring-cloud-azure-feature-management-web")
implementation("org.springframework.boot:spring-boot-starter-actuator")
mavenBom("org.springframework.cloud:spring-cloud-dependencies:2023.0.1")
plugins {
id("org.springframework.boot") version "3.2.3"
}
Code Snippet

Expected behavior
Application should start successfully

[mrm9084]

SriPalla, can you clean provider the versions of our Spring libraries you are using. Also, which version of Spring AOP are you using, It seems like it is an issue with Spring AOP and our library not Spring Actuator.

[SriPalla]

Matthew Metcalf (@mrm9084) Springboot version: 3.2.3 spring-aop: 6.1.4
The issue is being observed after adding springboot actuator dependency along with spring aop

[jimmyca15]

It seems like it is an issue with Spring AOP and our library

Matthew Metcalf (@mrm9084) were you able to confirm this?

[mrm9084]

So where I've seen this issue before is when Spring Native gets involved and it tries to Mock out one of our classes that's marked as final. I'm trying to repo, but haven't had any luck yet.

[mrm9084]

SriPalla I'm having trouble replicating this, do you have a sample that replicates the issue. Also, the bug states that the application fails to start, but the top of the stack trace says

org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext:632 : Exception encountered during context initialization - cancelling refresh attempt: 

Which would only happen if the original started happened.

[mrm9084]

SriPalla, you you take that setup, with minimal app, (plus an empty config for GraphQL):

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

}

It starts up fine, with App Configuration enabled. I even added an endpoint to trigger refresh and it works fine. Are you doing something extra besides just running the Gradle build?

[SriPalla]

Issue is being observed when you add custom AOP for example loging request and response header around spring web Request mapping and then adding actuator dependency will fail server startup