Hello,

what do you want to do when the 2^nd branch does not reply a 487 to the internally generated CANCEL? Send it another four times?

This branch has ended already, due to the pickup on the 1^st branch.

Cheers,

Henning

From: Richard Chan <shihping.chan@gmail.com>
Sent: Freitag, 31. März 2023 02:12
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>
Subject: [SR-Users] CANCEL timeout in branch route does not trigger any failure routes

Hi Kamailio users

How can I get a failure route to trigger in timeout-to-CANCEL in

a parallel forking scenario?

Parallel forking test scenario

1. one(the main - 0) branch picks up the call

2. 2nd branch sends CANCEL (expecting 487 etc) - but the callee does not send any replies

Result:

No failure route handlers are called on timeout of this CANCEL - that is kamailio attempts the  CANCEL 4 times but neither

tm.t_on_failure_route, tm.t_on_branch_failure handlers are called.

Any suggestions on how to resolve this?

Regards

Shih-Ping