Hi Henning, Thanks for your reply. The issue is that we have several load balancers behind an anycast setup and it’s not guaranteed that every packet belonging to a transaction is indeed processed by the same server. Cheers Julius On 10. Jan 2023, at 17:29, Henning Westerholt <hw(a)gilawa.com> wrote:  Hello, If you are already using http_async_reply and therefore processing the request stateful, I personally would just stay stateful. What is your motivation about trying to avoid it? Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com *From:* Julius Flohr <flohr(a)sipgate.de> *Sent:* Tuesday, January 10, 2023 4:47 PM *To:* sr-users(a)lists.kamailio.org *Cc:* Alles wird besser <alleswirdbesser(a)sipgate.de> *Subject:* [SR-Users] Performing async_http calls on stateless Loadbalancers Hi List, we are running several stateless SIP Loadbalancers using Kamaillio 5.1 and 5.6. Now we would like to perform an async_http request if an INVITE matches certain criteria. The request itself is performed very similar to how it's described here [1] This uses the transaction module in order to assure that the response can be mapped to the original request. However, this also means that the processing of the entire request becomes stateful which we would like to avoid. We tried to use t_release() in the callback route (in [1] this route is called "RELAY_API_RESPONSE"). However, documentation says that this is only allowed in the REQUEST_ROUTE. Is there an easy way to circumnavigate this issue? Cheers [1]: https://wazo-platform.org/blog/kamailio-routing-with-rtjson-and-http-async-… -- Julius Flohr - Voice Engineer - flohr(a)sipgate.de Telefon: +49 (0)211-63 55 55-0 Mobil: +49 (0)1579-000-0205 Telefax: +49 (0)211-63 55 55-22 sipgate GmbH - Gladbacher Str. 74 - 40219 Düsseldorf HRB Düsseldorf 39841 - Geschäftsführer: Thilo Salmon, Tim Mois Steuernummer: 106/5724/7147, Umsatzsteuer-ID: DE219349391 www.sipgate.de - www.sipgate.co.uk __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: