Injected @EJB is null in @Service Singleton's constructor in JBoss EAP 5.x

Solution Verified - Updated -


I have a JBoss Singleton implemented with @Service annotation, which uses the @EJB annotation to inject an EJB reference. The injected EJB variable is being used in the constructor. When it deploys, it throws a null pointer exception (NullPointerException). How do I specify that this service is dependent on the EJB? I thought the @EJB handled that. See Example code:

import org.jboss.ejb3.annotation.Service;
import javax.ejb.EJB;

public class ExampleService{
    ExampleEJB ejb;

    public ExampleService(){
         ejb.hello(); // getting null pointer here


  • JBoss Enterprise Application Platform (EAP)
    • 5.x

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