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

[Jiho HAN]

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

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Thanks
Jiho


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