Re: [Quickfix-developers] Intermittent disconnects on Solaris

[Oren M. <or...@qu...>]

Yeah, I agree.

--oren

----- Original Message ----- 
From: "Caleb Epstein" <cal...@gm...>
To: <kri...@rb...>
Cc: <qui...@li...>; <Bar...@gs...>
Sent: Monday, March 21, 2005 1:20 PM
Subject: Re: [Quickfix-developers] Intermittent disconnects on Solaris


> QuickFIX Documentation: 
> http://www.quickfixengine.org/quickfix/doc/html/index.html
> QuickFIX FAQ: http://www.quickfixengine.org/wikifix/index.php?QuickFixFAQ
> QuickFIX Support: http://www.quickfixengine.org/services.html
>
> 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
>
>
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