I find that my vendor's JMS implementation creates 2 sockets for each topic created. One of the socket is always empty of traffic. Does anyone know why there is this empty socket created?

Normally, if I were to create a "publish", I should have 1 socket. The program will publish out data on this socket. I encounter the situation whereby when I creates a "publish", 2 sockets are created. 1 of the socket never have any data traffic and will cause my firewall to terminate the socket.