Why would an MSH continue sending retries after receiving an ErrorList
for that MessageId? Section 6.5.7 indicates that when a message cannot be
delivered then a DFN must be returned. You are right though, it doesn't
actually say not to send any more retries.
I'm a little confused... If an Acknowledgment is present with an
ErrorList, does that mean the MSH does or doesn't send a DFN to the
application? I suppose if the message got far enough so that the receiving
MSH could actually generate an Acknowledgment then that would constitute
delivery for the purposes of RM? I think this would be OK -- send an
ErrorList and an Acknowledgment together.
I'm still not clear why the sending MSH would continue to send retries if
it got an ErrorList (containing the appropriate RefToMessageId) from the
receiving MSH but without an Acknowledgment?
Regards,
David Fischer
Drummond Group.
-----Original Message-----
From: Doug Bunting
[mailto:]
Sent: Wednesday, February 13, 2002 7:23
PM
To:
Subject: Re:
[ebxml-msg] Reliable Messaging question
Arvola,
I believe this is captured in issue 125. In David's response [1], he
indicated an ErrorList could end retries but that interpretation is not borne
out by our current documentation and seems incorrect. I would suggest we
stick with the current retry semantics and end retries only upon receipt of an
Acknowledgment or exhaustion of allowable retries. If a MSH receiving a
message in error chooses to respond with an Acknowledgment bundled together
with an ErrorList, fine.
I also agree this option (combining Acknowledgment with ErrorList) isn't
well described. Improving that description was the intent of issue 125.
thanx,
doug
[1] http://lists.oasis-open.org/archives/ebxml-msg/200202/msg00006.html
(specifically, the XML file attached and unhelpfully inlined by the OASIS
site)
Arvola Chan wrote:
Section 7.5.2 in Draft version
2.0 describes Receiving Message Behavior under the ebXML Reliable Messaging
Protocol. It does not mention anything about error
handling. Suppose the received message is
erroneous (e.g., some elements in the message are inconsistent with the
CPA), the receiver is obligated to return an Error message. It is not clear
to me if an Acknowledgment MUST also be included in the Error
message. Does the Error message serve as an
implicit Acknowledgement? Will the sender keep retrying until it gets back
an Acknowledgment (i.e., as long as the number of allowable retries have not
been exhausted)? Thanks,-Arvola
