Hi,

We run Kamailio 3.2.3 (FLAVOUR=ser) on an embedded ARM platform in near-
default configuration.

In a duration test, we observe that at a certain moment Kamailio seems to
start ignoring all (re-)register messages, and eventually expires the
existing registrations.

We have not been able to reproduce the issue using debug-level logging
(-dddd). Info-level logging (-ddd) does reproduce the error, but does not
produce any error messages.

Configuration: ser-basic.cfg, with the following changes:
port=5060
alias=testnet

Command line:
ser -m 4 -f /etc/ser/ser-basic.cfg -n3 -l udp:eth0

Load:
Bursts of 8 (Re-)REGISTER messages that are repeated every 85 seconds. The
specified expiration time is 120 seconds.
Bursts of 9 (Re-)INVITE messages that are repeated every 45 seconds.

Note:
With this load it takes roughly 1 hour for the error to occur. Using a more
standard 3600 second expiration time Kamailio still stalls, it just takes
longer.

Does anyone have any idea how to tackle this issue?

Kind regards,

Michiel Veldkamp