Re: [Quickfix-users] FIX SequenceNumbers problem

[Roman T. <ro...@de...>]

Hello, guys!

I've just resolved this issue.

If you set ResetOnLogout option, the Initator side will drop the 
fix-storage after finishing the session.
That's means - actually, sequences will be reset on NEXT logon only. But 
if you
switch off ResetOnLogout, you Initiator fix-storage will be broken, 
because of sequence numbers information has been destroyed.

Also, the sosurce codes has undocumented option: SendResetSeqNumFlag=Y
If set, this option enforces sequence reset on LOGON, without data 
corruption.

But! Current version of quickfix has a bug, SendResetSeqNumFlag will 
work incorrect.
I have a patch with fixes for this bug.


Roman Tsiroulnikov wrote:

> QuickFIX Documentation: 
> http://www.quickfixengine.org/quickfix/doc/html/index.html
> QuickFIX Support: http://www.quickfixengine.org/services.html
>
>
> Hello, quickifix team!
>
> I'm newbie using quickix, but I have strange problem with message 
> sequence numbers.
> Problem occurs only on Initiator side. In normal LOGON mode 
> (ResetSeqNumFlag=N),
> everything was fine. If initiator side tries to login in SeqReset mode 
> (LOGON with ResetSeqNumFlag=Y),
> session works OK, but library does not update <fix-store>/FIX-4.4-*.* 
> files with FIX session storage data.
> As the result, initiator side loses sequence numbers and FIX messages 
> body information.
> After that, if initiator open a session with normal LOGON 
> (ResetSeqNumFlag=N),
> the initiator trying to start session from sequence number 1, but 
> server expected number N. After that,
> acceptor receives LOGON from initiator and reply by LOGOUT with error 
> (Text=MsgSeqNum too low, expecting N but received 1).
>
> version: FIX 4.4, quickfix-1.10.2
>
> Hope for your help ;-)
>
> Wishing you nice day, Roman
>
>
>
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-- 
Wishing you nice day,
___________________________
Roman Tsiroulnikov
Monitoring & infrastructure projects
ro...@de... <mailto:ro...@de...>
http://www.devexperts.com
Tel. +7(812) 336-57-88