Hi,

>> IIRC, it can happen only when the application tries to close the already
>> closed connection. Do you call XAConnection.close() method in your code?
>
> No, definitely not. It must be called by JBoss internally!?
> And it just happend again after a while without activity on my side:

Hmmm... it must be something strange... Can it be that you have
specified pingInterval, but not the ping statement.

Roman