[Quickfix-developers] ResendRequest/SequenceReset-GapFill results in losing important messages

[Alex S. <al...@ho...>]

Hi



Quickfix seems to ignore an important message in what looks like a race 
condition.

Consider this scenario:



Quickfix sends a login, seq# 3319

OtherEngine responds to login with seq#3323

Quickfix missed #3322 when it previously disconnected, so it sends a 
ResendRequest for #3322, which happens to be a heartbeat

before OtherEngine receives the resend request, it sends out the Trading 
Session Status, #3324

OtherEngine sends a Gap-Fill resetting the sequence number to #3325

Session continues with OtherEngine’s sequence number at 3325 and Quickfix’s 
sequence number at 3321



My app never hears about the trading session status message.



If this is not a problem with quickfix, what can I do to ensure that I never 
miss the trading status message?



Thanks!



Alex