c# - "An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full"

Question

I've written an IP multicasting application in C#. It compiles fine, but at runtime this line:

sock.SetSocketOption(SocketOptionLevel.IP,
                     SocketOptionName.AddMembership,
                     new MulticastOption(IPAddress.Parse("224.100.0.1")));

throws an unhandled socket exception:

An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full

I searched for the error in Google and people have suggested to remove the 3GB switch (my OS is Windows 7) which may have been enabled. I did that, but still get the same error. What could be the issue?

Answer 1

It could be port exhaustion. When application(s) makes too many outgoing connections in short time frame or does not dispose outgoing connections properly - you run out of ports.

Here is the link to rather lengthy explanation and a way to diagnose the issue