[asterisk-users] Asterisk crashing on AAAA lookup

[George Joseph]

On Wed, Jun 27, 2018 at 5:15 AM Dovid Bender <dovid at telecurve.com> wrote:

>
>
> On Tue, Jun 26, 2018 at 7:59 PM, Richard Mudgett <rmudgett at digium.com>
> wrote:
>
>>
>>
>> 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
> /lib/systemd/system/asterisk.service
> 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?
>

Look in /var/lib/asterisk.  That's the home directory that the service file
sets.  Core files may be there.
Run "sysctl kernel.core_pattern".  That will tell you where the kernel will
place the files.

Did you previously install asterisk from apt and did you uninstall it
before compiling and installing 15.4.1?  The default version from apt is
13.18.3 so you may have a mixed installation that's causing issues.

Run "dmesg" after asterisk dies.  If it actually crashed, there'll be a
message in the kernel log.



>
>
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-- 
George Joseph
Digium, Inc. | Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org
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