Not deallocating resources causing Old Gen memory leaks

[Stuart Roe]

Hi all,
 
I appear to have a memory leak while performing an exchange and I'm unsure
how to identify it/correct it. Bascially, my application happily runs for a
few days and then fails with an out of memory exception. Using jconsole I
can see that the memory usage is bouncing around with a slow consistent
creap up. This is why I suspect a memory leak.
 
The message path within the app is cxf-bc (ver. 2009.01) -> cxf-se (ver.
2009.01) all running in SMX 3.3.1/WinXP. 
 
The handler in CXF-SE creates a new InOut message and sync. posts it to the
NMR, unmarshals the response into a reply. There is a copy of the handler
function below. I have removed the actual data handling and exceptions.
 
My question is, I'm I missing some form of deallocation/close call that will
return/release an object and hence remove my memory leak?
I have found that replacing the message exchange from the handler and hard
wiring a response fixes the leak.
 
Any help/pointers would be helpful.
 
Stuart.
 
BTW:
I'm using JiBX to marshal between NMR XML and Java objects (which may also
be the source of the problem).
 
 
public List<TypeConfigStatus> getConfigStatus() 
  try {
    GetConfigStatusResponse response = null;
 
    DeliveryChannel ch = getContext().getDeliveryChannel();
    InOut exch = ch.createExchangeFactory().createInOutExchange();
    exch.setService(getService());
    exch.setInMessage(exch.createMessage());
    exch.getInMessage().setProperty("operation", "config-status");
    exch.getInMessage().setContent(new StringSource("<empty />"));
 
    if(ch.sendSync(exch)){
        NormalizedMessage amsg = exch.getOutMessage();
        try {
          SourceTransformer trans = new SourceTransformer();
          String content = trans.contentToString(amsg);
          IBindingFactory bfact =
BindingDirectory.getFactory(GetConfigStatusResponse.class);
          IUnmarshallingContext uctx = bfact.createUnmarshallingContext();
          response = (GetConfigStatusResponse) uctx.unmarshalDocument(new
StringReader(content));

        } catch 
          // block removed
        }finally{
          exch.setStatus(ExchangeStatus.DONE);
          ch.send(exch);
        }
    }
 
    // set result = cooked(response)
 
  return result;
}