Joerg,
>platform
We use a combination of Windows and Linux with C++ and Python as the =
languages of choice.
>If we include such a feature, we should make it configurable. What are=20
>the exact problems with ResendRequests? Beginning with 1.6.0, QF uses=20
>ResendRequest to Infinity. This shall fix some race conditions (and=20
>infinite loops) occured with 1.5.0. We also have some issues on=20
>ResendRequest still to be fixed in 1.6.0. Could you give the latest=20
>version (1.6.0) a try and tell me whether is solves your 500 message=20
>problem?
I agree this need to be configurable along with the week long session. =20
I am using 1.6.0. The problem with the CME is if you send a resend =
request of > 2000 messages they will reject it (they should just send a =
gap fill and be done with it!). The reject has no context info to know =
that the reject belongs to a resend request (IMO this is a failing with =
the FIX protocol in general). Since the sequence is still too high, QF =
resends the resend request before even processing the reject. The CME =
then rejects it, and on and on... This is a infinite loop that could =
cause huge amounts of data to be exchanged - without any productive work =
and no real way out. That is why I limited the resend request to 500 =
messages, it prevents this situation from occurring.
Cheers,
Rich
-----Original Message-----
From: Joerg Thoennes [mailto:Joe...@ma...]=20
Sent: Thursday, November 06, 2003 9:00 AM
To: Rich Holm
Cc: developers QuickFIX
Subject: Re: Modification to pass CME Certification
Hi Rich,
> I have since made a few more changes. I have attached them to this
> message.
I will look at you changes. They will require some extra modifications,
e.g. for the other API (Java, .NET etc). Which operating system and
software do you use with QuickFIX?
> One needed feature is a week long session. The CME starts you
> session on Monday and ends it Friday. I haven't had a chance to work
> on this. For now I just modify the .session file each night.
> If you have any questions on the changes I made, please let me know.
> One thing I hacked was resend requests. The CME rejects resend
> requests of over 2000 messages which actually causes an infinite loop
> of messages back and forth. I added a check for this and now request
> a maximum of 500.
If we include such a feature, we should make it configurable. What are=20
the exact problems with ResendRequests? Beginning with 1.6.0, QF uses=20
ResendRequest to Infinity. This shall fix some race conditions (and=20
infinite loops) occured with 1.5.0. We also have some issues on=20
ResendRequest still to be fixed in 1.6.0. Could you give the latest=20
version (1.6.0) a try and tell me whether is solves your 500 message=20
problem?
Cheers, J=F6rg
P.S. I Cc:'ed the developers list since such issues are of interest to
the other developers, too. So please send your message to this =
list
everytime it is appropriate. Thanks!
--=20
Joerg Thoennes
http://macd.com
Tel.: +49 (0)241 44597-24 Macdonald Associates GmbH
Fax : +49 (0)241 44597-10 Lothringer Str. 52, D-52070 Aachen
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