{{Quickfixn}} [EXTERNAL] Re: how to reset seq numbers

[Jiho HAN]

Unfortunately, the Refresh method seems to have been implemented only recently after 1.9 release.
We are still on 1.8 but it looks like I’d have to wait until 1.9.x for this change.

Thanks though. You guys are very helpful.
Jiho

From: Quickfixn <quickfixn-bounces at lists.quickfixn.com> On Behalf Of Grant Birchmeier
Sent: Wednesday, March 4, 2020 2:55 PM
To: Mailing list for QuickFIX/n <quickfixn at lists.quickfixn.com>
Subject: Re: {{Quickfixn}} [EXTERNAL] Re: how to reset seq numbers

I don't know why it's N.  Probably the feature was added at some point and the writer left it disabled by default in case it might break someone's backward compatibility.

Also, it's just not a super-important feature.  I had to look it up earlier today to even knew what it did!  It's nice when you need it, but it's rare that you will.

-Grant

On Wed, Mar 4, 2020 at 1:43 PM Jiho HAN <jiho.han at us.bnpparibas.com<mailto:jiho.han at us.bnpparibas.com>> wrote:
That sounds like a great option to have on!
I see the default it N.
Why would we not have it on all the time? What is the disadvantage?

From: Quickfixn <quickfixn-bounces at lists.quickfixn.com<mailto:quickfixn-bounces at lists.quickfixn.com>> On Behalf Of Grant Birchmeier
Sent: Wednesday, March 4, 2020 12:36 PM
To: Mailing list for QuickFIX/n <quickfixn at lists.quickfixn.com<mailto:quickfixn at lists.quickfixn.com>>
Subject: [EXTERNAL] Re: {{Quickfixn}} how to reset seq numbers

Oh, yeah, that would work.

On Wed, Mar 4, 2020 at 11:19 AM Mike Gatny <mgatny at connamara.com<mailto:mgatny at connamara.com>> wrote:
I mean once you've added  RefreshOnLogon=Y to your config, and restarted -- would that then help when 1) you've edited the seqnums file and 2) a Logon then triggers a Refresh?

--
Mike Gatny
Connamara Systems


On Wed, Mar 4, 2020 at 11:26 AM Grant Birchmeier <gbirchmeier at connamara.com<mailto:gbirchmeier at connamara.com>> wrote:
Mike, the app won't reload the configuration until restart, so it wouldn't work.

On Wed, Mar 4, 2020 at 10:19 AM Mike Gatny <mgatny at connamara.com<mailto:mgatny at connamara.com>> wrote:
Would RefreshOnLogon=Y help here, to avoid having to restart?

--
Mike Gatny
Connamara Systems


On Wed, Mar 4, 2020 at 11:00 AM Grant Birchmeier <gbirchmeier at connamara.com<mailto:gbirchmeier at connamara.com>> wrote:
A restart is necessary.  The file tells the app what seq numbers to resume.  The app keeps the file updated, but only refers to it at startup.

On Wed, Mar 4, 2020 at 9:48 AM Jiho HAN <jiho.han at us.bnpparibas.com<mailto:jiho.han at us.bnpparibas.com>> wrote:
I am using the default file store and the seqnums file contains something like below:

0000000983 : 0000000001

And the counterparty is getting the usual, “MsgSeqNum too high, expecting 2700 but received 980” error and then I get disconnected (I am the initiator here).
I suspect that the mismatched start/end time is causing this drift.

In any case, what is the right course of action if I want to reset the seq number to what the counterparty is expecting?
Do I update 983 to 2700 in the file and restart my application? Is the restart necessary or will the engine pick up the change in the file somehow?
I briefly looked at the source of QuickFix/n and it looks like there is an in-memory cache behind it which leads me to believe that a restart may be necessary.

Thanks
Jiho

--
Grant Birchmeier
Connamara Systems, LLC
Made-To-Measure Trading Solutions.
Exactly what you need. No more. No less.
http://connamara.com

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