[SR-Users] occasional processing delay and UAC remote registration

[Dmitri Savolainen]

Hi all.

i encountered  in my 4.1.5 kamailio server some inconstant issue.

I have 2 listen address:
addr1 for incoming SIP requests and as source addr for remote registration
(via UAC module)
addr2 for incoming SIP requests only

uac config for regs:
modparam("uac", "reg_keep_callid", 1)
modparam("uac", "reg_random_delay", 120)
modparam("uac", "reg_retry_interval", 300)
modparam("uac", "reg_timer_interval", 40)

i have response time checking tool, that send OPTIONS every second,
which immedeately replied by sl_send_reply("200")  without any processing.
Usualy respose time <1ms.

Sometimes (2-3 per day) addr1 stop to response for these OPTIONS (timeout
>5sec), while addr2  continue responding with time <1ms.  In kamailio.log
at this moment bunch of messages like

ERROR: uac [uac_reg.c:1034]: uac_reg_tm_callback(): got sip response 403
> while registering

ERROR: uac [uac_reg.c:1034]: uac_reg_tm_callback(): got sip response 408
> while registering


That is normal: some remotes are broken.

The problem is:
1. usually these messages appearing is not the reason of problem, but all
problems are while these messages in log
2. it may be on OFF peak  / ON peak day period
3. in my test installation i have much more remote failure registration (X
10), and the problem is not manifested more often (but i can catch it 2-3
per day)

I think adding more workers for addr1 may help (now 8 worker and 16 CPUs).
But it is interesting to understand the source of this issue




-- 
Savolainen Dmitri
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20180903/e72ffa3d/attachment.html>