Olle E. Johansson writes:
Got a minute to explore the old wiki and found a very
interesting document:
http://www.kamailio.org/dokuwiki/doku.php/troubleshooting:tm:t_relay
In this document, Juha and Iñaki discusses how t_relay REALLY works
and in which cases
the failure_route is executed.
Is this document still valid? Do we still have to document this in TM?
Are any of these issues fixed in the code?
daniel made an improvement to tm some time ago, but issues still
remain. see this: