{{Quickfixn}} Question on appication failure and how ResendRequest works

[Christoph John]

"0" simply means "to infinity", i.e. the most current seqnum that is used on receiver side.
See https://fiximate.fixtrading.org/en/FIX.5.0SP2_EP254/tag16.html

Cheers,
Chris.


On 21.02.20 05:14, Jiho HAN wrote:
> I created a pair of test apps, a sender and a receiver.
> They are connected and the sender is sending execution reports and then I kill the receiver to 
> simulate failure.
> I see an event entry, “Sent ResendRequest FROM: 86820 TO: 0” on the receiver side.
> It seems to be asking for all messages from 86820 (either including/excluding, not sure) to 87211 
> (again not sure, I’m guessing excluding).
> The “0” is what throws me.
> Can someone describe in detail what’s happening? Or point me to a documentation of how this works?
> The following are what I see:
> Sender seq num: 87209
> Receiver seq num: 86820
> Sender event log>
> 20200221-03:54:35.696 : Received logon
> 20200221-03:54:35.696 : Responding to logon request
> 20200221-03:54:35.712 : Got resend request from 86820 to 0
> 20200221-03:54:35.760 : Sent SequenceReset TO: 87212
> Receiver event log>
> 20200221-03:54:35.680 : Connection succeeded
> 20200221-03:54:35.696 : Initiated logon request
> 20200221-03:54:35.712 : Received logon
> 20200221-03:54:35.712 : MsgSeqNum too high, expecting 86820 but received 87211
> 20200221-03:54:35.712 : Sent ResendRequest FROM: 86820 TO: 0
> 20200221-03:54:35.712 : ResendRequest for messages FROM: 86820 TO: 0 has been satisfied.
> 20200221-03:54:35.838 : Processing queued message: 87211
> ----------
> Thanks
> Jiho
>
>
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-- 
Christoph John
Software Engineering
T +49 241 557080-28
christoph.john at macd.com

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