[Quickfixj-users] Missing BeginString tag on outbound Execution Reports

[Vlad R. <vra...@gm...>]

In our production environment we've seen this occur sporadically for
outbound Execution Reports on a particular FIX 4.4 session, using
QuickFIX/J 2.3.1 .

As an example:

Good:
8=FIX.4.4|9=532|35=8|34=2766|49=SENDER|52=20231006-20:00:18.322|56=TARGET|116=TRADE|
.... |10=114|

Bad:
9=558|35=8|34=2767|49=SENDER|52=20231006-20:00:18.329|56=TARGET|116=TRADE|
.... |10=114|

I had to remove the body but left the headers. The messages are built using
quickfix.Message class, adding following headers programmatically:
MsgType,OnBehalfOfSubID , DeliverToCompID.

Unlike quickfix.fix44.Message prior class does not update the BeginString
as normally this is done anyway by the Session before sending a message
out. As can be seen in the above example all other headers are present
(besides BeginString) and looking at the code they get initialized in the
same method.

I can find no explanation for this occurring and cannot reproduce myself.
Has anyone seen something like this occur?