[asterisk-users] PJSIP Lockup

[Nick Olsen]

We ultimately found this to be a voicemail issue. The voicemail is held in
MYSQL as well (via ODBC). And we found when attempting to playback a
customers voicemail unavail greeting is when the deadlock would occur
(Immediately, every time. Throwing the same "task processors" errors, And
making pjsip completely unresponsive). We had imported a number of
greetings from a legacy asterisk system and the vast majority of them
worked. When we deleted the row containing the customers unavail greeting
(making asterisk revert to read the mailbox number) all issues went away.
If we re-record the customers unavail greeting it works fine and the
problem doesn't reoccur. This was one out of ~250 voicemails imported.

Since then we've done a few more migrations and they've all gone smooth
with the exception of the most recent one. ~50% of the imported greetings
have caused asterisk to deadlock. We've been checking them now at time of
migration.

What I can't figure out is what it doesn't like about the greeting. It was
on a previous asterisk system working fine. The row looks identical to a
working one. The only thing I can guess is something about the blob for the
recording goes wrong. It would be nice if asterisk handled that more
gracefully.

I post this mostly just for internet history. To hopefully help the next
guy out who has this same issue.

*Nick Olsen*
Network Engineer
Office: 321-408-5000 x103
Mobile: 321-794-0763



On Mon, Mar 2, 2020 at 8:29 PM Joshua C. Colp <jcolp at sangoma.com> wrote:

> On Mon, Mar 2, 2020 at 4:24 PM Nick Olsen <
> nick at floridavirtualsolutions.com> wrote:
>
>> Thanks for the info, Joshua.
>>
>> Does PJSIP handle database access the same way Chan_sip did? We had a
>> number of boxes running chan_sip referencing the same mysql server without
>> issue.
>>
>> We're going to attempt to get a backtrace on the next occurance. We're
>> also going to run a local copy of the database on the same physical
>> asterisk instance and have the system reference it. Just to "throw
>> everything at the wall".
>>
>
> It uses the same underlying API and layer. It can do more frequent
> database access though due to queries and because PJSIP is multithreaded.
>
> --
> Joshua C. Colp
> Asterisk Technical Lead
> Sangoma Technologies
> Check us out at www.sangoma.com and www.asterisk.org
> --
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