WSACancelBlockingCall exception

Question

Ok, I have a strange exception thrown from my code that\'s been bothering me for ages.

System.Net.Sockets.SocketException: A blocking operation was interrupt         


        

Answer 1

This could happen on a serverSocket.Stop(). Which I called whenever Dispose was called.

Here is how my exception handling for the listen thread looked like:

try
{
    //...
}
catch (SocketException socketEx)
{    
    if (_disposed)
        ar.SetAsCompleted(null, false); //exception because listener stopped (disposed), ignore exception
    else
        ar.SetAsCompleted(socketEx, false);
}

Now what happened was, every so often the exception would occur before _disposed was set to true. So the solution for me was to make everything thread safe.