java - invalid session for QuickFIXJ -

java - invalid session for QuickFIXJ -

i trying prepare connection external counterparty works on 1 server. have moved implementation onto server (on different network own firewall). can see logon messages exchanged between 2 sides (i see both in application , network layer logs). however, responding counterparty message right after logon, prepare outbound message throws exception complaining there no valid session send message on. not see resets in network logs before (the reset occurs when above event occurs after quickfixj app sends logout). heartbeat interval set 30 seconds per counterparty instructions - exception happens within sec of logon response. same config works on different server (on not have firewall rules). ideas might causing , if network related, best approach confirm that?

update: issue related faulty logic on end - have fixed on end. session id not beingness populated before beingness accessed.

java quickfixj