CDI1.2 section 6.5.3 a null value should be returned for the injection point if it is not being injected into any injection point.

public class CDIBean2 {	
	private String data;	
	public String getData() {
		return data;
	}
	public void setData(String data) {
		this.data = data;
	}
}

 
public class CDIBean {
	
	CDIBean2 beanManagerInstance;

	public CDIBean(BeanManager manager){
		Set<Bean<?>> beanList = manager.getBeans(CDIBean2.class);
		if (beanList!=null && !beanList.isEmpty()){
			Bean<?> bean = beanList.iterator().next();
			CreationalContext<?> context = manager.createCreationalContext(bean);
			beanManagerInstance = (CDIBean2) manager.getReference(bean, CDIBean2.class, context);
		}
	}
	
	public String getData() {
		return beanManagerInstance.getData();
	}

	public void setData(String data) {
		beanManagerInstance.setData(data);
	}

public class CDIBean2Producer {
	
	@Produces
	public CDIBean2 produce(InjectionPoint ip){
		
		if(ip != null){			
			throw new RuntimeException("InjectionPoint exists when producing CDIBean2");
		}		
		return new CDIBean2();		
	}
}

public class CDIBeanProducer {
	
	@Inject
	private BeanManager manager;
	
	@Produces
	public CDIBean produce(InjectionPoint ip){
		
		if(ip == null){
			throw new RuntimeException("InjectionPoint is NULL when producing CDIBean");
		}		
		return new CDIBean(manager);		
	}
}

@WebServlet("/ProducerNullIPServlet")
public class TestServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    @Inject
    private CDIBean bean;
    @Inject
    private BeanManager manager;
    @Inject
    private Instance<AnotherBean> anotherBeanInstance;

    //@Override
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    //@Override
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        PrintWriter out = resp.getWriter();

        Set<Bean<?>> beanList = manager.getBeans(CDIBean2.class);
        if (beanList != null && !beanList.isEmpty()) {
            Bean<?> bean = beanList.iterator().next();
            CreationalContext<?> context = manager.createCreationalContext(bean);
            CDIBean2 beanManagerInstance = (CDIBean2) manager.getReference(bean, CDIBean2.class, context);
            beanManagerInstance.setData("Test2");
        }
        out.println("Test Sucessful!");
    }
}