I am running FreePBX distro with asterisk 13.17.0. After I performed an upgrade to this version, asterisk became unstable and crashes once or twice a week.
I have around 500 extensions all on the PJSIP, with approx. 250 online. Usually no more than 40 calls are present at any given time. There is no problem with CPU utilization (0.5 from 8), memory, swapping or network issues I can detect.
Backtrace from the last crash core can be found here: backtrace
Before an upgrade, I ran Asterisk 13.15 with no significant issues.
Any suggestion on how to track the problem and if possible fix it is welcome.