[asterisk-users] Asterisk crashing on AAAA lookup

[Dovid Bender]

On Wed, Jun 27, 2018 at 9:22 AM, George Joseph <gjoseph at digium.com> wrote:

>
>
> 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.
>
>
>
>>
>>
I did install Asterisk from source after I used apt-get. Any time in the
past when I installed Asterisk and then installed a new version the newer
version worked with no issue. I did an apt-get remove and now it seems the
issues cleared up. Thanks for the help.
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