14 Jul
2015
14 Jul
'15
6:15 a.m.
Hello,
Running kamailio 4.2.5 for a few weeks now, coming from 4.2.3. Since the
upgrade we increased the logging substantially in our routing to get
more insight into what is going on.
We noticed that in a few cases the log showed a SIP message was being
threated by multiple forks, each considering if it was a non-existing
call. e.g.
Jul 9 13:19:32 son-sbc1-dc1 /usr/sbin/kamailio[17170]: INFO: <script>:
28ca767d5524f7ac095efcd02d6995f5@1.2.3.4:5060 - CB, Checking service
restrictions
Jul 9 13:19:32 son-sbc1-dc1 /usr/sbin/kamailio[17170]: INFO: <script>:
28ca767d5524f7ac095efcd02d6995f5@1.2.3.4:5060 - CB, Checking
international restrictions
Jul 9 13:19:32 son-sbc1-dc1 /usr/sbin/kamailio[17171]: INFO: <script>:
28ca767d5524f7ac095efcd02d6995f5@1.2.3.4:5060 - CB, Checking service
restrictions
Jul 9 13:19:32 son-sbc1-dc1 /usr/sbin/kamailio[17171]: INFO: <script>:
28ca767d5524f7ac095efcd02d6995f5@1.2.3.4:5060 - CB, Checking
international restrictions
As you can see this shows different threads handling the exact same
callid (printed by $ci). And both run the same checks in our routing
plan. The main problem is, I'm not able to reproduce this on the
testplatform, but only see it happen on the main systems. Also, it
doesn't happen that often, in this case there are about maybe 10 similar
calls like this over the run of a few weeks. This case show the call
being handled by 2 threads, but we've even seen with one call it being
handled by 4 threads, all with the same $ci and the same messages, just
different PIDs.
I've checked and made sure the routing isn't recursively calling itself.
But even if that was true, I would imagine the same PID for all the log
entries.
Running production in debug mode isn't an option, as it will interfere
too much with the day-to-day business. So I'm hoping to get a few
pointers here maybe, I'm happy to look at the source code more in depth,
I just need a little help in the right direction to not get lost in
other code.
Any help is much appreciated.
Cheers,
Dirk