[OpenSIPS-Users] ERROR:tm:t_forward_nonack: discarding fwd for a cancelled/6xx transaction

[Krunal Patel]

Hello Bogdan,

Right now, the server is in production.
So I could not get the trace for the same.
Whenever I would get chance, I would post it here.

Thanks for your support.

--
Krunal


On Wed, Oct 14, 2009 at 2:39 AM, Bogdan-Andrei Iancu <bogdan at voice-system.ro
> wrote:

> Hi Alex,
>
> That is correct, but I was interested to see the logs to see why the
> parallel processing of CANCEL and INVITE leads to an 500....it would
> rather be a local 487 cancelled....But I need the logs to see how the
> processing takes place.
>
> Regards,
> Bogdan
>
> Alex Massover wrote:
> > Hi!
> >
> > I think we experienced something similar, as far as I remember the
> following fixes the issue in conjunction with the code below that Bogdan
> suggested:
> >
> > For INVITE you do:
> >
> >         t_newtran();
> >         t_reply("100","Trying");
> > ....
> > ....
> >         if(!t_relay("0x05"))
> >         {
> >                 #sl_reply_error(); # do not send error
> >         }
> >
> > The idea is to create transaction as fast as possible, and do not reply
> if t_relay() fails.
> >
> > For CANCEL you do, like Bogdan said:
> >
> >         if (is_method("CANCEL"))
> > {
> >         if (t_check_trans())
> >                 t_relay();
> >         exit;
> > }
> >
> > You get an error in log, but 500 is not sent. As far as I remember, there
> was no way to fix it more cleanly.
> >
> > The situation can be easy reproduced if you "slow down" processing of
> INVITE and then send CANCEL, for example with exec_dset("very_slow_script").
> >
> >
> > --
> > Best Regards,
> > Alex Massover
> > VoIP R&D TL
> > Jajah Inc.
> >
> >> -----Original Message-----
> >> From: users-bounces at lists.opensips.org [mailto:users-
> >> bounces at lists.opensips.org] On Behalf Of Bogdan-Andrei Iancu
> >> Sent: Tuesday, October 13, 2009 4:17 PM
> >> To: OpenSIPS users mailling list
> >> Subject: Re: [OpenSIPS-Users] ERROR:tm:t_forward_nonack: discarding fwd
> >> for a cancelled/6xx transaction
> >>
> >> Hi Krunal,
> >>
> >> could you send me (off list if necessary) a trace of the call and the
> >> output of opensips in debug mode 6 ?
> >>
> >> Regards,
> >> Bogdan
> >>
> >> Krunal Patel wrote:
> >>
> >>> Hello Bogdan,
> >>>
> >>> I have your suggested code block , in my cfg.
> >>> But still getting the same.
> >>>
> >>> --
> >>> Krunal Patel
> >>>
> >>> On Mon, Oct 12, 2009 at 9:04 PM, Bogdan-Andrei Iancu
> >>> <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>> wrote:
> >>>
> >>>     Hi Krunal,
> >>>
> >>>     Looks like a race between the INVITE and CANCEL.....typical way
> >>>
> >> to
> >>
> >>>     deal
> >>>     with that is by processing the CANCEL only if it matches an
> >>>
> >> INVITE
> >>
> >>>     transaction:
> >>>
> >>>        # CANCEL processing
> >>>        if (is_method("CANCEL"))
> >>>        {
> >>>            if (t_check_trans())
> >>>                t_relay();
> >>>            exit;
> >>>        }
> >>>
> >>>
> >>>
> >>>     do you have this in your script ?
> >>>
> >>>     Regards,
> >>>     Bogdan
> >>>
> >>>     Krunal Patel wrote:
> >>>     > Hi,
> >>>     >
> >>>     > I am getting issue like :
> >>>     > ERROR:tm:t_forward_nonack: discarding fwd for a cancelled/6xx
> >>>     transaction
> >>>     >
> >>>     > Here is the SIP trace.
> >>>     >
> >>>     > U 2009/10/12 11:24:19.127160 XXX.XXX.XXX.XXX:5060 ->
> >>>     YYY.YYY.YYY.YYY:5060
> >>>     > INVITE sip:[EMAIL PROTECTED] SIP/2.0.
> >>>     >
> >>>     > U 2009/10/12 11:24:19.127237 XXX.XXX.XXX.XXX:5060 ->
> >>>     YYY.YYY.YYY.YYY:5060
> >>>     > CANCEL sip:[EMAIL PROTECTED] SIP/2.0.
> >>>     >
> >>>     > U 2009/10/12 11:24:19.127276 YYY.YYY.YYY.YYY:5060 ->
> >>>     XXX.XXX.XXX.XXX:5060
> >>>     > SIP/2.0 100 ci Trying...
> >>>     >
> >>>     > U 2009/10/12 11:24:19.130913 YYY.YYY.YYY.YYY:5060 ->
> >>>     XXX.XXX.XXX.XXX:5060
> >>>     > SIP/2.0 200 canceling.
> >>>     >
> >>>     > U 2009/10/12 11:24:19.142229 YYY.YYY.YYY.YYY:5060 ->
> >>>     XXX.XXX.XXX.XXX:5060
> >>>     > SIP/2.0 500 Server error occurred (19/SL).
> >>>     >
> >>>     > U 2009/10/12 11:24:19.182452 XXX.XXX.XXX.XXX:5060 ->
> >>>     YYY.YYY.YYY.YYY:5060
> >>>     > ACK sip:[EMAIL PROTECTED] SIP/2.0.
> >>>     >
> >>>     > This happens when OpenSIPS gets CANCEL from caller before it
> >>>     sends 100
> >>>     > Trying to CALLER for the INVITE.
> >>>     >
> >>>     > Please let me know how to resolve it.
> >>>     >
> >>>     > I have put t_was_cancelled in onreply & failure route both.
> >>>     >
> >>>     > Thanks in advance,
> >>>     >
> >>>     > --
> >>>     > Krunal Patel
> >>>     >
> >>>     >
> >>>
>
>
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