Question

A WCF service is based on NetTcpBinding. It may happen that a client silently vanishes, leaving the server without knowledge that it is not connected anymore.

I’m currently using a thread that pings all connected client to see if they are still alive, and removes disconnected clients.

• Is a ping thread the correct way to solve the issue, or is there a better, possibly event-based way?
• Do I have to surround every code that communicates with the client by try/catch and remove it from the list of connected clients additionally?

Answer 1

I believe I found the answer myself.

There is an event OperationContext.Current.Channel.Closing that is fired on faulted as well as closed connections.