Illegal reflective access by org.springframework.cglib.core.ReflectUtils - spring-core-5.2.5.RELEASE.jar

[mananmehta11]

.m2/repository/org/springframework/spring-core/5.2.5.RELEASE/spring-core-5.2.5.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)

started to appear when using Spring HATEOAS - linkTo(methodOn(Some.class))

[mananmehta11]

Stack Trace:
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/home/manan/.m2/repository/org/springframework/spring-core/5.2.5.RELEASE/spring-core-5.2.5.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:533)
at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363)
at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:582)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108)
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:134)
at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319)
at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:569)
at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:416)
at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)
at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:205)
at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)
at org.springframework.hateoas.server.core.DummyInvocationUtils.getProxyWithInterceptor(DummyInvocationUtils.java:167)
at org.springframework.hateoas.server.core.DummyInvocationUtils.access$000(DummyInvocationUtils.java:40)
at org.springframework.hateoas.server.core.DummyInvocationUtils$InvocationRecordingMethodInterceptor.invoke(DummyInvocationUtils.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691)
at tacos.web.DesignTacoController$$EnhancerBySpringCGLIB$$703cce15.recentTaco()
at tacos.web.DesignTacoController.recentTaco(DesignTacoController.java:64)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)

[mananmehta11]

similar issue
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/home/manan/.m2/repository/com/thoughtworks/xstream/xstream/1.4.11.1/xstream-1.4.11.1.jar) to field java.util.TreeMap.comparator
WARNING: Please consider reporting this to the maintainers of com.thoughtworks.xstream.core.util.Fields
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release

[dkellenb]

Same error, but related to Futures. (Java 1.11.0 OpenJDK AMD6, spring-core-5.2.5.RELEASE)

defineClass:501, ReflectUtils (org.springframework.cglib.core)
generate:363, AbstractClassGenerator (org.springframework.cglib.core)
generate:582, Enhancer (org.springframework.cglib.proxy)
apply:110, AbstractClassGenerator$ClassLoaderData$3 (org.springframework.cglib.core)
apply:108, AbstractClassGenerator$ClassLoaderData$3 (org.springframework.cglib.core)
call:54, LoadingCache$2 (org.springframework.cglib.core.internal)
run$$$capture:264, FutureTask (java.util.concurrent)
run:-1, FutureTask (java.util.concurrent)

• Async stack trace
  :132, FutureTask (java.util.concurrent)
  createEntry:52, LoadingCache (org.springframework.cglib.core.internal)
  get:34, LoadingCache (org.springframework.cglib.core.internal)
  get:134, AbstractClassGenerator$ClassLoaderData (org.springframework.cglib.core)
  create:319, AbstractClassGenerator (org.springframework.cglib.core)
  createHelper:569, Enhancer (org.springframework.cglib.proxy)
  createClass:416, Enhancer (org.springframework.cglib.proxy)
  createClass:137, ConfigurationClassEnhancer (org.springframework.context.annotation)
  enhance:109, ConfigurationClassEnhancer (org.springframework.context.annotation)
  enhanceConfigurationClasses:423, ConfigurationClassPostProcessor (org.springframework.context.annotation)
  postProcessBeanFactory:257, ConfigurationClassPostProcessor (org.springframework.context.annotation)
  invokeBeanFactoryPostProcessors:286, PostProcessorRegistrationDelegate (org.springframework.context.support)
  invokeBeanFactoryPostProcessors:130, PostProcessorRegistrationDelegate (org.springframework.context.support)
  invokeBeanFactoryPostProcessors:706, AbstractApplicationContext (org.springframework.context.support)
  refresh:532, AbstractApplicationContext (org.springframework.context.support)
  refresh:141, ServletWebServerApplicationContext (org.springframework.boot.web.servlet.context)
  refresh:747, SpringApplication (org.springframework.boot)
  refreshContext:397, SpringApplication (org.springframework.boot)
  run:315, SpringApplication (org.springframework.boot)
  run:1226, SpringApplication (org.springframework.boot)
  run:1215, SpringApplication (org.springframework.boot)
  main:32, ConfigSeederManagementAppH2 (com.configseeder)
  invoke0:-2, NativeMethodAccessorImpl (jdk.internal.reflect)
  invoke:62, NativeMethodAccessorImpl (jdk.internal.reflect)
  invoke:43, DelegatingMethodAccessorImpl (jdk.internal.reflect)
  invoke:566, Method (java.lang.reflect)
  run:49, RestartLauncher (org.springframework.boot.devtools.restart)

[elfhazard]

I also lived up to my mind, and as I was creating a new project today, a warning came to my attention and I found it.

In conclusion, this warning relates to the Java Platform Module System (JPMS), a jigsaw project, added since Java 9.

This feature has led to a stricter security management from inside Java, and ReflectUtils uses a feature not to be used in Java, which causes a warning.

Currently, if you use Java9 or higher, you have to put --add-opens java.base/java.lang=ALL-UNNAMED when you run the JVM.

[jazdw]

Similar issue in Spring 5.2.9 when using an @Async annotated method

WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/C:/Users/Jared/.m2/repository/org/springframework/spring-core/5.2.9.RELEASE/spring-core-5.2.9.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
	at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:533)
	at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363)
	at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:585)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:110)
	at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:108)
	at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
	at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java)
	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$ClassLoaderData.get(AbstractClassGenerator.java:134)
	at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:319)
	at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:572)
	at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:419)
	at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)
	at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:205)
	at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:110)
	at org.springframework.aop.framework.AbstractAdvisingBeanPostProcessor.postProcessAfterInitialization(AbstractAdvisingBeanPostProcessor.java:92)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:430)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1798)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516)
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551)
	at com.serotonin.m2m2.Lifecycle.springRuntimeContextInitialize(Lifecycle.java:386)
	at com.serotonin.m2m2.Lifecycle.initialize(Lifecycle.java:292)
	at com.serotonin.m2m2.Main.main(Main.java:144)

[snicoll]

Duplicate #22674