Bidirectional Relationship MarshalException on EJB3 Client

[octaviob]

I'm getting a MarshalException on a client application (Eclipse RCP).
I have a bidirectional relationship Employee-Supervisor, both of the same class.

My client app can retrieve a Supervisor entity, including the subordinate employees, without a problem. However, if I attempt to retrieve an employee that has a supervisor, I get a MarshalException on the client side:

java.rmi.MarshalException: Failed to communicate. Problem during marshalling/unmarshalling; nested exception is:
 java.lang.NullPointerException
at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:306)
at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:143)
at org.jboss.remoting.Client.invoke(Client.java:525)
at org.jboss.remoting.Client.invoke(Client.java:488)

I'm using JBoss 4.0.5.GA. There are no Exceptions on the server side.

I'm including the code that defines the relationship (I do initialize the subordinate set on the server before sending the entity to the client):

@OneToMany(mappedBy = "supervisor", fetch=FetchType.LAZY )
public Set<Employee> getSubordinateSet(){
 return subordinateSet;
}

@ManyToOne(fetch=FetchType.EAGER)
@JoinColumn(name = "supervisor")
public Employee getSupervisor(){
 return supervisor;
}

Any suggestions/guidance will be greatly appreciated...

Octavio

[waynebaylor]

Just a guess, but maybe the Supervisor's Employee set is not being initialized since it's lazily fetched.

[octaviob]

Wayne,
I did confirm that the supervisor's employee set is being initialized... so that's not the problem. The relationships is initialized on both sides.

What could trigger a MarshalException in EJB3? Could it be a problem with 4.0.5GA?

Any other ideas/suggestions will be greatly appreciated.

Octavio

[waynebaylor]

i saw this, http://jira.jboss.com/jira/browse/EJBTHREE-952

are you using java 1.5 or 1.6?

[octaviob]

I'm using JRE 1.5.0_07....