I've found this @Stateless annotation in some code like:
public Interface A
@Stateless
public abstract class B implements A
public class C extends B
public class D extends B
But Intellij is then saying B shouldn't be declared as abstract. Is Intellij right here and the Stateless is not actually propagated to the classes extending B and I'd have to declare them as Stateless or C, D are properly set as Stateless?
You need to add Stateless in all subclasses too.
Take a look at this: Inheriting class annotations
Only the annotations annotated with @Inherited are propagated https://www.logicbig.com/tutorials/core-java-tutorial/annotations/inherited-meta-annotation.html