[asterisk-users] Exceptionally long queue length queuing

Joshua C. Colp jcolp at sangoma.com
Fri Jul 3 04:28:50 CDT 2020

On Fri, Jul 3, 2020 at 3:32 AM Dovid Bender <dovid at telecurve.com> wrote:

> On Mon, Jun 29, 2020 at 6:46 AM Joshua C. Colp <jcolp at sangoma.com> wrote:
>> On Sun, Jun 28, 2020 at 2:26 PM Dovid Bender <dovid at telecurve.com> wrote:
>>> Hi,
>>> We have a box up and we are starting to see a lot of "Exceptionally long
>>> queue length queuing" in the logs. From all the research so far it seems
>>> like this leads to their systems crashing and being unreachable. In our
>>> case the box remains up and takes calls. We are running Asterisk 16.6.1. We
>>> are using MusicOnHold to play online music streams via ffmpeg. Any idea on
>>> how to troubleshoot this further to see why this is happening?
>> The message occurs when either a channel is deadlocked or the processing
>> time to handle what a channel is doing is substantial, and things build up.
>> Getting a backtrace[1] at the time it occurs will show what the system is
>> actually doing and can provide insight into what is causing it.
>> [1]
>> https://wiki.asterisk.org/wiki/display/AST/Getting+a+Backtrace#GettingaBacktrace-Runningast_coredumperfordeadlocks,taskprocessorbackups,etc
>> .
>> --
> I ended up re-writing my code to use less Local channels and most of the
> errors went away. I also noticed that my load average and CPU usage is way
> down. I will open a ticket since it seems  that it may be a bug that others
> are experiencing.

A backtrace would still be needed for the issue, otherwise there is no way
to know what exactly is going on our where things are getting held up.

Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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