Re: [Quickfix-developers] Intermittent disconnects on Solaris

[Caleb E. <cal...@gm...>]

On Mon, 21 Mar 2005 19:02:19 -0000, kri...@rb...
<kri...@rb...> wrote:

> I have isolated the cause of the intermittent disconnects caused by QuickFIX on Solaris. The problem was due to the use of the I_NREAD ioctl to determine whether a readable socket was EOF or not.
> 
> In certain circumstances which seem to involve high network traffic and low machine load, I_NREAD will return zero for a readable socket that actually has data. In such cases, QuickFIX would erroneously close the socket.
> 
> I replaced the I_NREAD code in socket_disconnected() one byte recv() with the MSG_PEEK flag. This appears to have resolved this rather troublesome issue for us in production.
> 

Shouldn't QuickFIX just rely on recv returning 0 to detect a socket
disconnect, instead of relying on this ioctl?  I've never seen a
socket-based application using this technique to detect disconnects
before.  Clearly its not 100% reliable.

-- 
Caleb Epstein
caleb dot epstein at gmail dot com