Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass 문제해

 

토비의 스프링 3.1 실습 도중 문제

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DaoFactory 생성 후 이를 스프링으로 사용하기 위해 필요한 jar파일들을 넣고 변환하는 과정중 exception이 발생했다.

 

이클립스 버전 : 2021-09

Java 버전 : 17

 

에러 내용

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Exception in thread "main" java.lang.IllegalStateException: Cannot load configuration class: springbook.user.dao.DaoFactory
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:249)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanFactory(ConfigurationClassPostProcessor.java:163)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:663)
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:602)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:407)
	at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:65)
	at UserDaoTest.main(UserDaoTest.java:14)
Caused by: java.lang.ExceptionInInitializerError
	at net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:166)
	at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
	at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
	at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:144)
	at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:116)
	at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
	at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
	at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
	at org.springframework.context.annotation.ConfigurationClassEnhancer.newEnhancer(ConfigurationClassEnhancer.java:101)
	at org.springframework.context.annotation.ConfigurationClassEnhancer.enhance(ConfigurationClassEnhancer.java:89)
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:241)
	... 6 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 @32eebfca
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	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 net.sf.cglib.core.ReflectUtils$2.run(ReflectUtils.java:56)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
	at net.sf.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:46)
	... 17 more

 

 

해결 방법

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구글링 결과

 

eclipse.ini 에 --add-opens=java.base/java.lang=ALL-UNNAMED 소스를 추가하면 된다고 했는데 여전히 같은 에러 발생해서 다른 방법으로 해결을 했다.

 

Window > Preference > Java > Install JREs 에서

 

현재 설치되어 있는 JRE 버전 > Edit 

 

Default VM arguments 에 위의 소스를 추가 했더니 정상적으로 생성.

 

 

결과

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