I am rather new to J2EE programming, so please bear with me.  I am
trying to create a simple J2EE application that uses EJBs to manage
identity and address information.  To do this, I have 2 bean classes:
Address and Person.  The Person bean has the following fields:  first
name, middle name, and last name.  The Address bean has the following
fields:  street, city, state, zip code.

I've managed to setup CMP in JBoss using MySQL on the backend.  I've
created EJBHome and EJBObject interfaces for both of my entity beans,
and can create instances of each with no problem.  Now, I would like
to be able to create a Person p and assign an Address a to it as
follows:  p.setAddress(a).  Now, I understand that I have to define a
container-managed relationship to do this.  I've looked at tutorials
and documentation, and thought that I had it setup properly.  I have
defined the relationship in my ejb-jar.xml file, and the tables seem
to be created properly.  My Person table has a column named "address"
that *should* store the primary key of my Address object as a foreign
key.  However, I receive an exception whenever I try to set the
address value.  In my ejb-jar.xml file I have the following:

   <relationships>
       <ejb-relation>
           <ejb-relation-name>Person-Address</ejb-relation-name>
           <ejb-relationship-role>
               <ejb-relationship-role-name>Person-has-an-Address</ejb-relationship-role-name>
               <multiplicity>One</multiplicity>
               <relationship-role-source>
                   <ejb-name>PersonEJB</ejb-name>
               </relationship-role-source>
               <cmr-field>
                   <cmr-field-name>address</cmr-field-name>
               </cmr-field>
           </ejb-relationship-role>
           <ejb-relationship-role>
               <ejb-relationship-role-name>Address-belongs-to-Person</ejb-relationship-role-name>
               <multiplicity>One</multiplicity>
               <cascade-delete/>
               <relationship-role-source>
                   <ejb-name>AddressEJB</ejb-name>
               </relationship-role-source>
           </ejb-relationship-role>
       </ejb-relation>
   </relationships>

The exception I receive is:

EXCEPTION:  null
java.lang.reflect.UndeclaredThrowableException
       at $Proxy1.setAddress(Unknown Source)
       at ejb.addressbook.client.AddressBookClient.main(AddressBookClient.java:64)
Caused by: java.rmi.ServerException: RemoteException occurred in
server thread; nested exception is:
       java.rmi.ServerException: EJBException:; nested exception is:
       javax.ejb.EJBException: null; CausedByException is:
       null
       at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:292)
       at sun.rmi.transport.Transport$1.run(Transport.java:148)
       at java.security.AccessController.doPrivileged(Native Method)
       at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
       at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
       at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
       at java.lang.Thread.run(Thread.java:534)
       at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:247)
       at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:223)
       at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:133)
       at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown
Source)
       at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:135)
       at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:87)
       at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
       at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:45)
       at org.jboss.proxy.ejb.EntityInterceptor.invoke(EntityInterceptor.java:97)
       at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85)
       ... 2 more
Caused by: java.rmi.ServerException: EJBException:; nested exception
is:
       javax.ejb.EJBException: null; CausedByException is:
       null
       at org.jboss.ejb.plugins.LogInterceptor.handleException(LogInterceptor.java:346)
       at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:195)
       at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:122)
       at org.jboss.ejb.EntityContainer.internalInvoke(EntityContainer.java:483)
       at org.jboss.ejb.Container.invoke(Container.java:674)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:324)
       at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549)
       at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:359)
       at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown
Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:324)
       at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
       at sun.rmi.transport.Transport$1.run(Transport.java:148)
       at java.security.AccessController.doPrivileged(Native Method)
       at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
       at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
       at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
       at java.lang.Thread.run(Thread.java:534)
Caused by: javax.ejb.EJBException: null; CausedByException is:
       null
       at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.setInstanceValue(JDBCCMRFieldBridge.java:673)
       at org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.setValue(JDBCCMRFieldBridge.java:541)
       at org.jboss.ejb.plugins.cmp.bridge.EntityBridgeInvocationHandler.invoke(EntityBridgeInvocationHandler.java:126)
       at org.jboss.proxy.compiler.Runtime.invoke(Runtime.java:59)
       at ejb.addressbook.beans.PersonBean$Proxy.setAddress(<generated>)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:324)
       at org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityContainer.java:1044)
       at org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationInterceptor.java:95)
       at org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:301)
       at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
       at org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:82)
       at org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:174)
       at org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:89)
       at org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:53)
       at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:84)
       at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:243)
       at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:104)
       at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:117)
       at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:191)
       ... 20 more

I would REALLY appreciate any guidance that you all can give me.  I am
new to J2EE programming and have been learning quickly, but this is
standing in the way of my progress.  Thanks very much!

Steve Nakhla