I have a sample application with an EJB3 SLSB which is being injected with a PersistenceContext which is configured in a different jar file as follows

package org.myapp.ejb.impl;

import javax.ejb.Remote;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

import org.jboss.annotation.ejb.RemoteBinding;
import org.myapp.ejb.AppManager;

@Stateless
@Remote (

)
@RemoteBinding (jndiBinding = "AppManagerBean")
public class AppManagerBean implements AppManager {

@PersistenceContext (unitName="myapp_ejb3.jar#EJB3Persistence")
private EntityManager em;

public String getVersion()

}

The application is deployed as an EAR file in the following structure:

EJB3Persistence.ear

When this application is deployed in 4.2.2 the deployment fails with an exception. Part of the exception is pasted below. The relevant log files (ConsoleLog_Fail.txt and serverLog_fail.txt in the logs.zip file) are attached.

22:45:41,137 INFO [JmxKernelAbstraction] creating wrapper delegate for: org.jboss.ejb3.stateless.StatelessContainer
22:45:41,152 INFO [JmxKernelAbstraction] installing MBean: jboss.j2ee:ear=EJB3Persistence.ear,jar=another_ejb3.jar,name=AppManagerBean,service=EJB3 with dependencies:
22:45:41,152 INFO [JmxKernelAbstraction] persistence.units:jar=pp_ejb3.jar,unitName=EJB3Persistence
22:45:41,152 INFO [EJB3Deployer] Deployed: file:/D:/JBoss-4.2.2/jboss-4.2.2.GA/server/default/tmp/deploy/tmp53619EJB3Persistence.ear-contents/another_ejb3.jar
22:45:41,168 INFO [EARDeployer] Started J2EE application: file:/D:/JBoss-4.2.2/jboss-4.2.2.GA/server/default/deploy/EJB3Persistence.ear
22:45:41,184 ERROR [URLDeploymentScanner] Incomplete Deployment listing:

— MBeans waiting for other MBeans —
ObjectName: jboss.j2ee:ear=EJB3Persistence.ear,jar=another_ejb3.jar,name=AppManagerBean,service=EJB3
State: NOTYETINSTALLED
I Depend On:
persistence.units:jar=pp_ejb3.jar,unitName=EJB3Persistence

— MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM —
ObjectName: persistence.units:jar=pp_ejb3.jar,unitName=EJB3Persistence
State: NOTYETINSTALLED
Depends On Me:
jboss.j2ee:ear=EJB3Persistence.ear,jar=another_ejb3.jar,name=AppManagerBean,service=EJB3

If i change the PersistenceContext injection, in the bean, to prefix 3 random letters to the unitName as follows:

@PersistenceContext (unitName="XXXmyapp_ejb3.jar#EJB3Persistence")
private EntityManager em;

and deploy the application, then everything works fine (have also attached the successful logs ConsoleLogs_Success.txt and serverLogs_Success.txt in the logs.zip file).