Improve exception when injecting EJB Local Interface Proxy loaded from two different classloaders ------------------------------------------------------------------------------------------------- Key: WFLY-8875 URL: https://issues.jboss.org/browse/WFLY-8875 Project: WildFly Issue Type: Enhancement Components: EE, EJB Affects Versions: 11.0.0.Alpha1 Environment: Deploy test-case.ear to reproducer Reporter: Brad Maxwell Priority: Minor Attachments: test-case.ear If an EJB client tries to use @EJB to inject an EJB Local Proxy and the Local interface is in two different classloaders/modules/sub-deployments, it throws the error below. It would be helpful for the user to identify the issue if the exception indicated multiple classloaders or class HelloWorld is loaded from multiple modules or class cast exception. {code} Caused by: java.lang.IllegalArgumentException: Can not set example.api.HelloWorld field example.client.ClientSingleton.helloWorld to example.api.HelloWorld$$$view1 at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:81) at java.lang.reflect.Field.set(Field.java:764) at org.jboss.as.ee.component.ManagedReferenceFieldInjectionInterceptorFactory$ManagedReferenceFieldInjectionInterceptor.processInvocation(ManagedReferenceFieldInjectionInterceptorFactory.java:106) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:240) at org.jboss.as.ee.component.AroundConstructInterceptorFactory$1.processInvocation(AroundConstructInterceptorFactory.java:28) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:240) at org.jboss.as.weld.injection.WeldInterceptorInjectionInterceptor.processInvocation(WeldInterceptorInjectionInterceptor.java:56) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:240) at org.jboss.as.weld.interceptors.Jsr299BindingsCreateInterceptor.processInvocation(Jsr299BindingsCreateInterceptor.java:100) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:240) at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:240) at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:275) ... 26 more {code}