.net - C# -- TcpListener.Start() causing SocketException with message "Only one usage of each socket address" -


i have service it's coming invokes start() method on tcplistener instance. listener using port not common , not known used other services. very span of minute or experiences odd error. minute service (which on failure restarts immediately) back crashes on following exception:

   socketexception    @ system.net.sockets.socket.dobind(system.net.endpoint, system.net.socketaddress)    @ system.net.sockets.socket.bind(system.net.endpoint)    @ system.net.sockets.tcplistener.start(int32)    @ mytestserver.server.startlistening()

with exception message follows:

only 1 usage of each socket address (protocol/network address/port) permitted

this article suggests i'm experience port exhaustion , should tweak registry modify timeout , port range values winsock. , well, have (or expect have) 50-100 clients connecting. how possibly run out of ports? bots , port scanners?

it isn't port exhaustion in post. connecting out wcf (which tcpclient). binding tcp port , waiting connection. isn't strictly same thing. binding specific tcp port number. when message, windows (correctly or not) thinks in use. windows reporting process bound port, can't. can have 2 processes trying use port , problem, 50-100 figure isn't issue.

either causing problem somewhere else or there other application causing problem.

if service experiencing problem , dies without ever calling tcplistener.stop(), service restarts itself, won't able bind port because windows may not know process done it.

you'll have post more details further.


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