openjms tunnel - normal behaviour?

I don't know how to explain this, so here is basically what I did:

1. Created a simple client that basically subscribes to topic1 using the HTTP protocol.
2. openjms-tunnel installed in Tomcat 5.5
3. Client is at work, openjms is at home. Communication over Internet.

The client successfully connects and subscribes. I can publish messages using the Sender example
and the client receives them asynchronously. then I notice that there is network traffic when
there shouldn't be (ie. no program accessing the internet and no messages are published). So I
open up TCPVIEW and notice that the client program has a connection to the server.. then about
every second or so, the client establishes a new connection to the server and then disconnects. So
for about a second, there are two connections the client has with the server. Plus, each time it
connects, it uses a new port on the client machine. So for example, it connects initially using
port 1775, then a second later is connects using port 1776, and so on. And if I leave the client
running for about 30 seconds, it will have used up ports 1775-1800 or so. All the previous
connections are in a TIME_WAIT state. After about 30 seconds, it starts closing the previous
connections a couple of them at a time.

Just wondering if this is normal and if so, why every second?

Thanks.


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