InaccessibleObjectException when trying to create CGLIB Spring proxy
cglib, java, jep-396, spring, spring-aop
Solution
My first guess is that you want to run an older Spring version on a JRE 16+. Probably that old Spring version depends on an equally dated CGLIB version which uses internal Java APIs now blocked due to JEP 396, which was implemented for Java 16. Maybe you can simply upgrade CGLIB and continue to use your old Spring version, maybe you need to upgrade both. Without more detailed information from you, it is hard to say. A minimal example Maven or Gradle project on GitHub, reproducing the problem, would be great.
On a second thought, maybe for now you can get away with adding
--add-opens java.base/java.lang=ALL-UNNAMED
to your JVM command line. But even if it would work, it would not be a particularly sustainable solution, only a workaround.
Problem
``` Feb 02, 2022 12:58:03 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@71318ec4: startup date [Wed Feb 02 12:58:03 IST 2022]; root of context hierarchy Feb 02, 2022 12:58:03 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions INFO: Loading XML bean definitions from class path resource [spring.xml] Feb 02, 2022 12:58:04 PM org.springframework.context.support.AbstractApplicationContext refresh WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'triangle' defined in class path resource [spring.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Unexpected AOP exception; nested exception is java.lang.ExceptionInInitializerError Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'triangle' defined in class path resource [spring.xml]: Initialization of bean failed; nested exception is org.springframework.aop.framework.AopConfigException: Unexpected AOP exception; nested exception is java.lang.ExceptionInInitializerError at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:591) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:758) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85) at com.vishal.main.DrawingMain.main(DrawingMain.java:10) Caused by: org.springframework.aop.framework.AopConfigException: Unexpected AOP exception; nested exception is java.lang.ExceptionInInitializerError at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:215) at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:473) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:355) at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:304) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:438) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1714) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:583) ... 11 more Caused by: java.lang.ExceptionInInitializerError at org.springframework.aop.framework.CglibAopProxy.createEnhancer(CglibAopProxy.java:232) at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:181) ... 18 more Caused by: org.springframework.cglib.core.CodeGenerationException: java.lang.reflect.InaccessibleObjectException-->Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @8519cb4 at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:464) at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:336) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91) at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61) at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34) at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116) at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291) at org.springframework.cglib.core.KeyFactory$Generator.create(KeyFactory.java:221) at org.springframework.cglib.core.KeyFactory.create(KeyFactory.java:174) at org.springframework.cglib.core.KeyFactory.create(KeyFactory.java:153) at org.springframework.cglib.proxy.Enhancer.<clinit>(Enhancer.java:73) ... 20 more Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @8519cb4 at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357) at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297) at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199) at java.base/java.lang.reflect.Method.setAccessible(Method.java:193) at org.springframework.cglib.core.ReflectUtils$1.run(ReflectUtils.java:61) at java.base/java.security.AccessController.doPrivileged(AccessController.java:554) at org.springframework.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:52) at org.springframework.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:243) at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25) at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:329) ... 32 more ```