RE: [Quickfix-users] What is correct behavior if sender has error sending msg?

[Brendan B. B. <br...@ka...>]

Oren,

Thanks for the reply.  Comments below.

> -----Original Message-----
> From: Oren Miller [mailto:ore...@ya...]

> m_state.set( msgSeqNum, messageString );
> m_state.incrNextSenderMsgSeqNum();
>
> This is ok whether or not the send is succesful,
> because the message will be resent sometime in the
> future.  When send returns true, it actually isn't

This is done when an attempt to send another msg occurs or in the
background?

> terribly informative since it really could be
> logically false.  It is true if we send on the socket
> and it returns false we know it failed, but if it
> returns true, at best we think it likely succeeded but
> maybe not.  This is because we don't know if the
> counterparty processed it and is as good as not sent.
> So the success of any particular send doesn't really
> matter in the context of post processing.
>
> In fact, some people have pointed out recently
> (rightfully) that storage should be done *before* we
> even attempt to send.  And if we store and increment
> before sending, then the irrelevancy of that return
> value becomes more clear.
>
> Did you experience a particular problem with this?

Yes, but now that I'm trying to reproduce it, I can't <grrrr> :-(.

What I was seeing were 'gaps' in the message store e.g.

8=FIX.4.1^A9=60^A35=2^A34=100^A49=CLYN7^A52=20030711-20:08:00^A56=SLK^A7=87^
A16=91^A10=165^A
8=FIX.4.1^A9=60^A35=2^A34=101^A49=CLYN7^A52=20030711-20:08:00^A56=SLK^A7=87^
A16=92^A10=167^A
8=FIX.4.1^A9=60^A35=2^A34=103^A49=CLYN7^A52=20030711-20:08:00^A56=SLK^A7=87^
A16=94^A10=171^A
8=FIX.4.1^A9=60^A35=2^A34=104^A49=CLYN7^A52=20030711-20:08:00^A56=SLK^A7=87^
A16=95^A10=173^A

which would cause the target to issue a resend request.  Since it
couldn't be honored the target wouldn't allow further processing (I'm
pretty sure that the Sender didn't issue a Sequence Reset in this
case either).

Next time I can reproduce I'll debug further.

Regards,
Brendan