Hello. Issue #22674 was closed, but it still exists.
@jhoeller has mentioned, that it's fixed, but it obviously not.
Comment From: sbrannen
@Felixoid, can you please provide a full stack trace showing the code path leading to the warning you encounter?
Comment From: Felixoid
Here's a warning from our tests:
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/var/lib/jenkins/.gradle/caches/modules-2/files-2.1/org.springframework/spring-core/5.2.2.RELEASE/bfcf2f6d0494d89db63ae170b8491223c93a88dc/spring-core-5.2.2.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
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
Is it enough, or do you prefer me to provide something more?
Comment From: sbrannen
TL;DR: I'm trying to get a bigger picture of the exact use case that leads to this warning.
That warning tells us that something called org.springframework.cglib.core.ReflectUtils (which is Spring's repackaged version of CGLIB). That would likely be called when generating a CGLIB-based proxy; however, the information in the warning does not tell us the code path that got us here.
In other words, is it part of the Spring Framework (or a Spring portfolio project) that is creating the proxy, or is it an external library that is relying on Spring to create a proxy. Also, what is a proxy being created for -- a type from your application, or some other type?
Comment From: sbrannen
Potentially a duplicate of #23099
Comment From: Felixoid
We get this warning during integration tests and I can't find a way to produce stack trace for this warning.
I've found the test where it comes from, but can't paste it here because of NDA. The next snippet from build.gradle doesn't help:
test {
testLogging {
exceptionFormat = 'full'
showStackTraces = true
}
}
We launch gradle with command ./gradlew --no-daemon check --full-stacktrace --debug and I don't see anything around the mentioned snippet despite the test class name class SomeTest extends AbstractControllerTestCase
Comment From: jhoeller
As just mentioned in https://github.com/spring-projects/spring-framework/issues/22674#issuecomment-589116539, this is unfortunately much more involved than a simple "fixed" versus "not fixed". We did address the case that can be semantically adapted to the JDK 9+ Lookup.defineClass API in Spring Framework 5.1... but certain cases remain where that API is not sufficient, in particular defining classes in custom ClassLoader architectures. We have to keep using ClassLoader.defineClass there; such a warning is therefore totally expected for those cases. We can only try to address specific cases based on detailed reports... either on the caller's side through changing the candidate class, or potentially through some heuristics within our CGLIB code.
Comment From: jCalculette
Interestingly, I was playing around with several dependecies while choosing frameworks for a new project and I noticed that the warning also happens when you try to use
to enable use of JSF in a project that would also potentially incorporate latest PrimeFaces.
Other details about the project would be that other than incorporating dependancies for PrimeFaces, PrimeFaces Extension and BootStrap, it is purely initialized from spring boot and runs JDK 13.
Once you remove joinfaces, the warning also went away. So I would say that at least there is one of the culprits.
Adding full list of used dependancies if someone wants to check it out as well:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Additional packages -->
<!-- JSF related -->
<dependency>
<groupId>org.primefaces.extensions</groupId>
<artifactId>primefaces-extensions</artifactId>
<version>8.0</version>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>8.0</version>
</dependency>
<dependency>
<groupId>org.joinfaces</groupId>
<artifactId>jsf-spring-boot-starter</artifactId>
<version>4.1.4</version>
</dependency>
<dependency>
<groupId>com.ocpsoft</groupId>
<artifactId>prettyfaces-jsf2</artifactId>
<version>3.3.3</version>
</dependency>
<!-- Bootstrap and FontAwesome -->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>font-awesome</artifactId>
<version>5.12.0</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>4.4.1-1</version>
</dependency>
Comment From: Felixoid
We have the issue only during the testing, and here's a list of our gradle test dependencies:
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.1'
testImplementation 'org.junit.jupiter:junit-jupiter-params:5.3.1'
testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
Maybe this would help
Comment From: adzubla
I have an application using
Java 11.0.6 Spring Boot 2.2.5 Spring Cloud Hoxton.SR3
When I added spring-cloud-starter-zipkin dependency the warning below occurred:
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/home/user/.m2/repository/org/springframework/spring-core/5.2.4.RELEASE/spring-core-5.2.4.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils
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
Using --illegal-access=debug the stack trace is:
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/home/user/.m2/repository/org/springframework/spring-core/5.2.4.RELEASE/spring-core-5.2.4.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.ProxyFactoryBean.getProxy(ProxyFactoryBean.java:378)
at org.springframework.aop.framework.ProxyFactoryBean.getSingletonInstance(ProxyFactoryBean.java:330)
at org.springframework.aop.framework.ProxyFactoryBean.getObject(ProxyFactoryBean.java:254)
at org.springframework.cloud.sleuth.instrument.async.ExecutorBeanPostProcessor.getObject(ExecutorBeanPostProcessor.java:287)
at org.springframework.cloud.sleuth.instrument.async.ExecutorBeanPostProcessor.getProxiedObject(ExecutorBeanPostProcessor.java:234)
at org.springframework.cloud.sleuth.instrument.async.ExecutorBeanPostProcessor.createExecutorServiceProxy(ExecutorBeanPostProcessor.java:204)
at org.springframework.cloud.sleuth.instrument.async.ExecutorBeanPostProcessor.wrapExecutorService(ExecutorBeanPostProcessor.java:157)
at org.springframework.cloud.sleuth.instrument.async.ExecutorBeanPostProcessor.postProcessAfterInitialization(ExecutorBeanPostProcessor.java:101)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:431)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
Comment From: MahatmaFatalError
OpenJDK Runtime Environment (build 11.0.6.0.1+10-LTS-sapmachine)
Using --illegal-access=debug the stack trace is:
In my case, it is apparently related to H2
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/home/user/.m2/repository/org/springframework/spring-core/5.2.4.RELEASE/spring-core-5.2.4.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:533)
at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363)
at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:582)
at org.springframework.cglib.core.AbstractClassGenerator$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.aop.scope.ScopedProxyFactoryBean.setBeanFactory(ScopedProxyFactoryBean.java:117)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeAwareMethods(AbstractAutowireCapableBeanFactory.java:1818)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1783)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1287)
at org.springframework.beans.factory.support.DefaultListableBeanFactory$DependencyObjectProvider.getIfAvailable(DefaultListableBeanFactory.java:1920)
at org.springframework.beans.factory.ObjectProvider.ifAvailable(ObjectProvider.java:91)
at org.springframework.boot.autoconfigure.h2.H2ConsoleAutoConfiguration.h2Console(H2ConsoleAutoConfiguration.java:72)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651)
Comment From: bclozel
Closing as a duplicate of #22674, see this comment for more details.
Comment From: ggutierrezgarzon
I used this pom, and my problem dissapared
Comment From: jdsalasca
Report:
Spring Boot: 2.3.1
WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils (file:/home/dev-juan/.m2/repository/org/springframework/spring-core/5.2.7.RELEASE/spring-core-5.2.7.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils 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