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POWCF prevent server disconnect
 

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    <p>I have a small client/server application. I was using a hand-coded TCP connection to allow the client to control the server, but now I've converted it to WCF. This saved me a whole bunch of code, but it also gave me a whole new set of problems to fix...</p> <p>The latest problem is that after a while, the server disconnects the client. I do <em>not</em> want this to ever happen, under any circumstances. Currently the client gets about a quarter of the way through its run, and then explodes with fire because the server has dropped the connection. I need to stop this happening.</p> <p>I was able to write a trivial WCF client/server pair that replicates the problem. It seems that if the client calls a method, waits 15 minutes, and then calls a second method, the second call throws an exception babbling something about the socket having been closed. If I reduce the delay, everything works fine.</p> <p>I read in another answer somewhere that setting <code>ReceiveTimeout</code> should fix this. However, when I tried it, this only fixes the problem under .NET; when running under Mono, it still breaks. Since Mono is the actual target platform, this isn't very helpful.</p> <p>(Think about SSH - you would <em>not</em> want an SSH server to disconnect you just because you didn't type anything for a while. Perhaps you issued a long-running shell command or something... Just because the <em>server</em> hasn't received any data from you doesn't mean nothing is happening! It certainly doesn't mean your connection should get dropped...)</p> <p>All code is C#. The server is a self-hosting console app. The client is also a console app. All configuration is in code. Binding is <code>NetTcpBinding</code> with default settings.</p> <p>What can I do to allow the client to run to completion successfully?</p> <p>I have a few ideas, but none of them are pretty:</p> <ul> <li>Manually send heartbeat messages. (Yuck!)</li> <li>Detect disconnection and automatically reconnect? (Again, yuck.)</li> <li>Turn on "reliable mode". (I'm guessing that since the server <em>deliberately</em> ends the session, this won't help.)</li> <li>Create one connection per method call. (That's going to be quite a lot of code...)</li> <li>Stop using WCF?</li> </ul>
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    1. COI tried updating from Mono 2.10.9 to Mono 3.2.3 to see if it would make any difference - it didn't. :-(
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