[OpenSIPS-Users] any reason why Opensips would replace 503 with 500 ?
Bogdan-Andrei Iancu
bogdan at voice-system.ro
Fri Oct 8 18:27:03 CEST 2010
Hi Dave,
Se RFC3261:
21.5.4 503 Service Unavailable
The server is temporarily unable to process the request due to a
temporary overloading or maintenance of the server. The server MAY
indicate when the client should retry the request in a Retry-After
header field. If no Retry-After is given, the client MUST act as if
it had received a 500 (Server Internal Error) response.
A client (proxy or UAC) receiving a 503 (Service Unavailable) SHOULD
attempt to forward the request to an alternate server. It SHOULD NOT
forward any other requests to that server for the duration specified
in the Retry-After header field, if present.
Servers MAY refuse the connection or drop the request instead of
responding with 503 (Service Unavailable).
So a 503 + Retry-After should od th trick for you, but not sure if your
customers properly implement the Retry After hdr.
Regards,
Bogdan
Dave Singer wrote:
> Thank you very much!!
> I'm doing class 4 switching and for some reason all my customers
> expect a 503 as a slow down your sending me too much traffic. Not the
> I'm broken.
> Is the 500 the proper way to tell them to back off a little. Is there
> a header that should be used to tell them how much to back off?
>
> Thanks again Bogdan for all your work and help you give everyone. I
> don't know how you keep up.
>
> Dave
>
> On Fri, Oct 8, 2010 at 4:32 AM, Bogdan-Andrei Iancu
> <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>> wrote:
>
> Hi Dave,
>
> See: http://www.opensips.org/Resources/DocsCoreFcn16#toc34 (added the
> docs for this module)
>
> Regards,
> Bogdan
>
> Dave Singer wrote:
> > Julien,
> >
> > I have been catching it in failure_route and sending it on up
> with this:
> > if (t_check_status("^503$")) {
> > t_reply("503", "Service Unavailable");
> > exit;
> > }
> >
> > I think you could use t_reply("503", $(<reply>rr)); (note the
> use of
> > <reply> to indicate the reply context see usage examples near
> the top
> > of this link: <http://www.opensips.org/Resources/DocsCoreVar16> ) to
> > have it use the original reason text instead of always sending
> > "Service Unavailable" no matter what reason came with the 503. I
> > haven't tried it yet myself.
> > I'm doing this because I'm just using it as a proxy to mangle
> headers
> > and not decide where to go next. So I really do just want to
> pass the
> > response back to the server doing the routing logic. It would seem
> > passing the 503 would be the normal behavior in this case. Plus like
> > the situation of Julien which I also have, where the upstream
> routers
> > are not properly handling the diff between a 500 and 503.
> >
> > So I agree that it would be nice if there were a param and/or
> var that
> > could be set for the desired behavior like the invite timeout
> settings
> > for tm.
> >
> > Bogdan,
> >
> > Is "disable_503_translation" ( from the subject of the link you
> posted
> > ) an actual parameter (un)documented?
> >
> > On Thu, Oct 7, 2010 at 2:44 PM, thrillerbee
> <thrillerbee at gmail.com <mailto:thrillerbee at gmail.com>
> > <mailto:thrillerbee at gmail.com <mailto:thrillerbee at gmail.com>>>
> wrote:
> >
> > Bogdan,
> >
> > Is this or could this be configurable? It, unfortunately,
> breaks
> > a lot of existing applications.
> >
> > Thanks.
> >
> >
> > On Thu, Oct 7, 2010 at 1:15 PM, Bogdan-Andrei Iancu
> > <bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>
> <mailto:bogdan at voice-system.ro <mailto:bogdan at voice-system.ro>>>
> wrote:
> >
> > Hi Julien,
> >
> > see:
> >
> http://lists.opensips.org/pipermail/users/2010-September/014505.html
> >
> > Regards,
> > Bogdan
> >
> > Julien Chavanton wrote:
> > > Hi, is there any reason why Opensips would replace 503
> with
> > 500 ?
> > >
> > > The UA initiating the call expect 503 to reroute
> somewhere else
> > >
> > > INVITE :
> > >
> > > 10.0.20.14(UA) -> 10.2.0.1(Proxy) -> 10.0.4.202(UA)
> > >
> > > RESPONSE :
> > >
> > > U 10.0.4.202:5060 <http://10.0.4.202:5060>
> <http://10.0.4.202:5060> -> 10.2.0.1:5060 <http://10.2.0.1:5060>
> > <http://10.2.0.1:5060>
> > > SIP/2.0 503 Service Unavailable.
> > >
> > > U 10.2.0.1:5060 <http://10.2.0.1:5060>
> <http://10.2.0.1:5060> -> 10.0.20.14:53584 <http://10.0.20.14:53584>
> > <http://10.0.20.14:53584>
> > > SIP/2.0 500 Service Unavailable.
> > >
> > >
> >
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> >
> >
> > --
> > Bogdan-Andrei Iancu
> > OpenSIPS Bootcamp
> > 15 - 19 November 2010, Edison, New Jersey, USA
> > www.voice-system.ro <http://www.voice-system.ro>
> <http://www.voice-system.ro>
> >
> >
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>
> --
> Bogdan-Andrei Iancu
> OpenSIPS Bootcamp
> 15 - 19 November 2010, Edison, New Jersey, USA
> www.voice-system.ro <http://www.voice-system.ro>
>
>
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--
Bogdan-Andrei Iancu
OpenSIPS Bootcamp
15 - 19 November 2010, Edison, New Jersey, USA
www.voice-system.ro
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