Re: [ebxmlms-general] Hermes servlet problem

[Arnstein V. <ar...@ki...>]

>Torsten Kirschner
>Sendt: 7. september 2006 08:17
>Til: 'General discussions'
>Emne: Re: [ebxmlms-general] [SPAM] - Hermes servlet problem
-BayesianFilter >detected spam

>Hi Arnstein,
>
>I think You might be wrong here.=20
>
>Hermes1 does support reliable messaging, and if I recall correctly,
this is
>implemented in a transport-agnostic way.=20
>
>Anyway, I have seen Hermes1 both send and receive acknowledgement
messages,
>as well as re-send messages if an acknowledgement was not received in
time.
>All over SMTP.

Well - we certainly couldn't get it working, and this is all very
strange, as I had confirmation of the problem from the developers as
well as an offer of paid consulting work to fix it:


>>> -----Opprinnelig melding-----
>>> Fra: Patrick Yee [mailto:kc...@ce...]
>>> Sendt: 20. januar 2006 03:51
>>> Til: Arnstein Vestad
>>> Kopi: 'ope...@ce...'
>>> Emne: Re: Smtp-fix for Hermes 1
>>>
>>> Hi Arnstein,
>>>
>>> Thanks for using Hermes.
>>>
>>> We did not implement a complete acknowledgment mechanism on SMTP.=20
>>> From our deployment experience, the time for using SMTP to transport

>>> ebXML message is not as predictable as the case we use HTTP. This is

>>> mainly due to the fact that SMTP is a connectionless protocol. In=20
>>> our experiement which we tried to send ebXML message between two=20
>>> Hermes installed in two different sites using SMTP, the messages may

>>> take days to travel from the sending server to the receiving one.
>>>
>>> Given this behaviour, the reliability parameters cannot be set=20
>>> properly. Our conclusion is then we do not encourage to turn on=20
>>> reliable messaging (i.e. ack) when using SMTP.
>>>
>>> So, will you consider to solve the reliablility requirement by using

>>> other workaround? e.g. to use a business message for synchronizing=20
>>> the the status on both sides.
>>>
>>>
>>> Regards,
>>> Patrick Yee
>>> Center for E-Commerce Infrastructure Development
>>>
>>> Making E-Commerce Everyday Commerce