Hello everyone.

I've been using outbound_proxy for a sometime now to make SIP go trough a kamailio proxy server. When I put freeswitch under some stress and measure response times, I start seeing a weird behavior. FS starts like "hanging" after a fast sequence of INVITES usually after the first 5 INVITE sipke(not that much right) and hangs for +/- 5 seconds before routing the call out to kamailio. If i tell FS to route the call using fs_path there is no delay at all. 

Another weird thing about this one is that I have some installs where outbound_proxy works fine with max performance everytime and I'm always using the same install binaries, the same OS the same versions of everything (checked and double checked).

You could tell me to use fs_path if it solves the problem and I would say you are right but the thing is fs_path doesn't behave exactly the same as outbound_proxy does in every situation.

It's usually common to see the variable destination_number set with the IP address of the proxy and some other annoying issues and above all outbound_proxy works at the SIP profile level while fs_path doesn't which force me to explicitly use it literally everywhere.

Any ideas on what could be causing this behavior. It looks like a timer of some kind but I don't see nothing about such a timer anywhere.

Looking forward to hear from you.

Cheers,

--

Nuno Miguel Reis | Unified Communication Systems
M. +351 913907481 | nreis@wavecom.pt

WAVECOM-Soluções Rádio, S.A.
Cacia Park | Rua do Progresso, Lote 15
3800-639 AVEIRO | Portugal
T. +351 309 700 225 | F. +351 234 919 191
GPS | www.wavecom.pt

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