Java EJB2 JNDI Look Up Fail when migrating from Jboss 4 to Jboss 6

Question

I have an EJB2 application running on JBOSS 4.2.3GA and the look up is working fine using: java:comp/env/ejb/MyEJB .

When moving to JBOSS AS 6.1.Final, it suddenly broke with exception NameNotFoundException.

JNDI View does show the EJB being bound to the correct tree. Putting a breakpoint before lookup I was able to watch and confirm that it is bound. Using context.list("java:comp/env/ejb") , I was able to see MyEJB in the iterator. Using context.lookup("java:comp/env/ejb") also works. However context.lookup("java:comp/env/ejb/MyEJB") shows NamingException on the watch window (and NameNotFoundException when running the actual code).

Is there anything changed that I do not know about? It's very difficult to find information on this EJB stuff and any information I found suggest either confirms what I'm doing it right or says to use ejb/MyEJB which doesn't work at all.

Thanks in advance. I appreciate your help.

ejb-jar.xml:

<session>
        <ejb-name>AdminSessionEJB</ejb-name>
        <local-home>com.admin.ejb.business.AdminSessionHome</local-home>
        <local>com.admin.ejb.business.AdminSession</local>
        <ejb-class>com.admin.ejb.business.AdminSessionEJB</ejb-class>
        <session-type>Stateless</session-type>
        <transaction-type>Container</transaction-type>
        <ejb-local-ref>
            <ejb-ref-name>ejb/UserEJB</ejb-ref-name>
            <ejb-ref-type>Entity</ejb-ref-type>
            <local-home>com.admin.ejb.entity.UserHome</local-home>
            <local>com.admin.ejb.entity.User</local>
            <ejb-link>UserEJB</ejb-link>
        </ejb-local-ref>
        <ejb-local-ref>
            <ejb-ref-name>ejb/UniqueKeyEJB</ejb-ref-name>
            <ejb-ref-type>Entity</ejb-ref-type>
            <local-home>com.framework.ejb.entity.UniqueKeyHome</local-home>
            <local>com.framework.ejb.entity.UniqueKey</local>
            <ejb-link>UniqueKeyEJB</ejb-link>               
        </ejb-local-ref>
        <ejb-local-ref>
            <ejb-ref-name>ejb/UserGroupEJB</ejb-ref-name>
            <ejb-ref-type>Entity</ejb-ref-type>
            <local-home>com.admin.ejb.entity.UserGroupHome</local-home>
            <local>com.admin.ejb.entity.UserGroup</local>
            <ejb-link>UserGroupEJB</ejb-link>
        </ejb-local-ref>
</session>

jboss.xml:

<enterprise-beans>
        <entity>

        <ejb-name>UserEJB</ejb-name>
        <local-jndi-name>ejb/UserHome</local-jndi-name>
        <read-only>false</read-only>
        <configuration-name>UserEJB Container Configuration</configuration-name>            
        <ejb-local-ref>
            <ejb-ref-name>ejb/UserGroupEJB</ejb-ref-name>
            <local-jndi-name>ejb/UserGroupHome</local-jndi-name>
        </ejb-local-ref>
    </entity>
</enterprise-beans>

Answer 1

Get the EJB in the context (in this case using class name):

public static <T> T getInstance(final Class<T> type) {
    T result = null;
    try {
        InitialContext ctx = new InitialContext();
        BeanManager manager = (BeanManager) ctx.lookup("java:comp/BeanManager");
        Set<Bean<?>> beans = manager.getBeans(type);
        Bean<T> bean = (Bean<T>) manager.resolve(beans);
        if (bean != null) {
            CreationalContext<T> context = manager.createCreationalContext(bean);
            if (context != null) {
                result = (T) manager.getReference(bean, type, context);
            }
        }
    } catch (NamingException e) {
        throw new RuntimeException(e);
    }
    return result;
}

Answer 2

It looks like the newer JBoss/WildFly versions don't cope with old deployment descriptors very well.

If you update the ejb-jar.xml schema from:

    <ejb-jar xmlns="http://java.sun.com/xml/ns/j2ee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
      http://java.sun.com/xml/ns/j2ee/ejb-jar_2_1.xsd"
      version="2.1">

to at least:

    <ejb-jar xmlns="http://java.sun.com/xml/ns/javaee"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
      http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd"
      version="3.0">

then it should work as advertised.

You can find a working example on GitHub at javaee14-ejb-demo