[asterisk-users] Asterisk crashing on AAAA lookup

Dovid Bender dovid at telecurve.com
Wed Jun 27 06:14:46 CDT 2018

On Tue, Jun 26, 2018 at 7:59 PM, Richard Mudgett <rmudgett at digium.com>

> On Tue, Jun 26, 2018 at 6:15 PM, Dovid Bender <dovid at telecurve.com> wrote:
>> I have Asterisk running on a Ubuntu 18.0.4 on Digital Ocean. Every so
>> often asterisk crashes and then restarts. I am not seeing any core dumps on
>> the box. The only I thing I see every time is a second before Asterisk
>> crashes there is a AAAA lookup for the boxes hostname. As soon as it gets
>> the response I see that asterisk is restarting. Any idea what would cause
>> this and how would get a dump or further debug? I did build Asterisk with
>> DONT_OPTIMIZE and BETTER_BACKTRACES but not seeing any traces anywhere. I
>> am using Asterisk 15.4.1.
> You have to start asterisk with the -g option to make asterisk create core
> files.
> https://wiki.asterisk.org/wiki/display/AST/Getting+a+Backtrace
> Richard
> It's very strange. So when I try to start asterisk via systemd I get:
root at fingerprint1:/var/lib/lxcfs/cgroup/name=systemd/system.slice#
systemctl start asterisk
Job for asterisk.service failed because a timeout was exceeded.
See "systemctl status asterisk.service" and "journalctl -xe" for details.
root at fingerprint1:/var/lib/lxcfs/cgroup/name=systemd/system.slice#
root at fingerprint1:/var/lib/lxcfs/cgroup/name=systemd/system.slice#
root at fingerprint1:/var/lib/lxcfs/cgroup/name=systemd/system.slice# ps aux |
grep aster
root     14412  0.1  0.5  25084  5208 pts/2    S+   10:52   0:00 nano
asterisk 14425  9.3  4.7 1304352 48144 ?       Ssl  10:52   0:00
/usr/sbin/asterisk -g -f -U asterisk
root     14526  0.0  0.0  14856   976 pts/0    S+   10:52   0:00 grep
--color=auto aster
root at fingerprint1:/var/lib/lxcfs/cgroup/name=systemd/system.slice#

As you can see it's still working. If I then connect to the console
asterisk is running fine, in this case Asterisk restarts randomly (every
1-2 minutes). If I then start asterisk myself by doing:
 /usr/sbin/asterisk -g -f -U asterisk

Then it starts fine and works with no issue. It would seem there is
something with systemd that is causing Asterisk to restart. I don't think
it's the actual script since I would then expect it to always restart at
the same time though I am not able to find any dumps any where on the box.

Any ideas?
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