[OpenSER-Users] OpenSER Sending INVITE Twice!?

Ovidiu Sas osas at voipembedded.com
Mon Dec 3 21:42:25 CET 2007


Hi Douglas,

You will need to upgrade to 1.2.2.
This issue was fixed starting with 1.2.0.


Regards,
Ovidiu Sas


On Dec 3, 2007 3:12 PM, Douglas Garstang <dougmig33 at yahoo.com> wrote:
>
> Ok, I can accept that it might be a timeout since it doesn't happen every
> single time.
> 1/5s seems awefully short though. How can I increase this? I can't find
> anything in the docs about increasing this timeout...
>
> Doug.
>
>
>
> ----- Original Message ----
> From: Ovidiu Sas <osas at voipembedded.com>
> To: Tavis P. <tavis.lists at galaxytelecom.net>
> Cc: users at openser.org
> Sent: Monday, December 3, 2007 12:01:53 PM
> Subject: Re: [OpenSER-Users] OpenSER Sending INVITE Twice!?
>
>  Right, 1/5 is not 1/2 :)
>
> -ovi
>
> On Dec 3, 2007 10:10 AM, Tavis P. <tavis.lists at galaxytelecom.net> wrote:
> >
> >  It may also be related to the timer accuracy of OpenSER 1.1
> >
> >  If the T1 interval is 500ms but OpenSER 1.1 doesn't support sub-second
> > timer accuracy it is probable to see it retransmitting in situations where
> > T1 hasn't been reached yet
> >  It shouldn't cause any problems though, just a few erroneous retransmits
> > from time to time
> >
> >  tavis
> >
> >  Ovidiu Sas wrote:
> >  Hi Douglas,
> >
> > You posted this questionawhileago and by checkingthe archives
> > Irealised that my answer was truncated somehow ...
> > Here's the full answer:
> >
> > This is the way that is supposed to work. If nothing is received from
> > upstream, the request is resent.
> > >From the rfc3261:
> >
> > 17.1.1.1 Overview of INVITE Transaction
> >
> >  The INVITE transaction consists of a three-way handshake. The client
> >  transaction sends an INVITE, the server transaction sends responses,
> >  and the client transaction sends an ACK. For unreliable transports
> >  (such as UDP), the client transaction retransmits requests at an
> >  interval that starts at T1 seconds and doubles after every
> >  retransmission. T1 is an estimate of the round-trip time (RTT), and
> >  it defaults to 500 ms.
> >
> >
> > It seems that your upstream UAS is slowin sending out the 100 Trying
> > and therefor openSER is resending out the INVITE.
> >
> >
> > Regards,
> > Ovidiu Sas
> >
> > On Dec 3, 2007 12:35 PM, Douglas Garstang <dougmig33 at yahoo.com> wrote:
> >
> >
> >  I have an OpenSER 1.1 install here, and for some reason, OpenSER is
> sending
> > the INVITE message twice to the upstream host.
> >
> > Asterisk OpenSER Provider
> > -----------------------------------------------
> > | ---INVITE---> | |
> > | | ---INVITE---> |
> > | | ---INVITE---> |
> > | | <---TRYING--- |
> > | | <---TRYING--- |
> >
> > The time difference between them is about 1/5 of a second. Nothing is
> > received between the first and second INVITE's.
> >
> > Why is OpenSER doing this?
> >
> > I have xlog() statements everywhere in openser.cfg, and OpenSER is only
> > logging ONE outgoing INVITE message, eventhough it's sending two. It is
> > logging the multiple TRYING messages that come back however.
> >
> > OpenSER is not calling failure_route because nothing is logged in there.
> > What could be going wrong? Why is it doing this?
> >
> > Doug.
> >
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