Inbound resource adapters have ConcurrentHashMap entrySet problem

Both the JmsResourceAdapter and MailResourceAdapter do:

public void stop()
{
for (Iterator i = activations.entrySet().iterator(); i.hasNext()
{
Map.Entry entry = (Map.Entry) i.next();
try
{
JmsActivation activation = (JmsActivation) entry.getValue();
activation.stop();

activation could be null