C# / Java Socket Connection Lost?

Question

I am making a C# client / Java server chatroom, and everything works fine now, except for one thing: After some time (an hour or so) of not using the application (or using it, I don't know) it gives me a SocketException at the C# client at the socket.EndReceive() function:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

Do Java or C# socket connections closes after some time of idling? Or is it just the tcp protocol? What would be the best method to fix it?

Thanks all!

Bas

nos · Accepted Answer · 2012-03-19 13:50:27Z

1

Do Java or C# socket connections closes after some time of idling?

No.

However, firewalls and especially NAT gateways do, often silently.

What would be the best method to fix it?

Implement a heartbeat procedure. i.e. the client and/or server periodically sends (e.g. every 10 or 30 or so seconds) a special message that's just used to keep the connection alive and to faster detect a failed peer.

answered Mar 19, 2012 at 13:50

nos

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1 Comment

Basaa Over a year ago

I just created a keepalive packet that is send every minute. Or does it have to be more often? When It's fixed I will mark the answer as accepted. Thanks!

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