FIN_WAIT_2 and a socket connect that takes an age to close.

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From: Andy Coates (nothanks_at_nowhere.com)
Date: 06/11/04 

Date: Fri, 11 Jun 2004 15:11:07 +0100

Hi,

I'm using Overlapped IO and completion ports to handle socket connections
coming into a server application. On shutdown I iterate over any current
socket connections calling ::shutdown() on each socket. I then wait until
all pending overlapped operations complete.

This normally works fine, but I have one client application (for which I
can't easily get source) that causes problems on shutdown. This particular
socket takes ~2minutes before the queued read operations complete. When I
run netstat I see that the socket is in the FIN_WAIT_2 state, which I
understand to mean that it has received the ACK from the client.

Why is this socket taking so long to shutdown?

Thanks for any help or advice you can give,

Andy

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