"java.lang.LinkageError: loader constraint violation" when calling method on JBoss

Issue

• An EAR which contains a WAR and some JAR files, and is giving the error:

java\,lang\,LinkageError: loader constraint violation: when resolving method "com\,example\,ServiceClass\,doSomething\(Lcom\,example\,MyBean;\)V" the class loader \(instance of org/jboss/classloader/spi/base/BaseClassLoader\) of the current class, com/example/CallerClass, and the class loader \(instance of org/jboss/classloader/spi/base/BaseClassLoader\) for resolved class, comp\,example/ServiceClass, have different Class objects for the type com/example/MyBean used in the signature