IllegalLoopbackException: Cannot call a method on a singleton session bean while constructing the bean instance

Question

I'm getting the following exception:

Exception data: javax.ejb.IllegalLoopbackException: Cannot call a method on a singleton session bean while constructing the bean instance : MyWar.war#BarProducer

My code is as follows.

I have a Stateless Session Bean that Injects both Foo and Bar.

@Stateless
public class MySessBean {

    @Inject
    private Foo foo;

    @Inject
    private Bar bar;

    public SomeData myMethod1(...){
        //does something with Foo
        foo.xyz();
    }

    public SomeData myMethod2(...){
        //does something with Bar
        bar.xyz();
    }   

}

I have a producer that creates the Singleton Foo:

@Singleton
public class FooProducer {

    @Produces
    public Foo getFoo() {
         return new Foo();
    }
}

I have another producer that creates the Singleton Bar. In order to create Bar I need to Inject Foo:

@Singleton
public class BarProducer {

    @Inject
    private Foo foo;

    @Produces
    public Bar getBar() {
            //uses Foo
        foo.xyz();
    }
}

I'm using WebSphere 8 (OpenWebBeans). I figured the container would know it needs to craete Foo singleton before it create Bar singleton??

Answer 1

you're not actually using CDI here. This is an EJB issue. The problem is that you're not specifying a @DependsOn for your EJBs. See here: http://docs.oracle.com/javaee/6/api/javax/ejb/DependsOn.html