Deadlock in asterisk 13.1-cert7

[abgenis]

We found this related ticket:

Asterisk 13.1-cert7 sudden freeze after 14 days of uptime

I have build it from sources, without pjsip. I use chan_sip and res_odbc for CDR and CEL. I could not restart it via ‘core restart now’. Only sigkill had an effect. I found this: http://www.mail-archive.com/asterisk-users@lists.digium.com/msg280927.html How could I debug it? I am unable to recreate this bug. I will try to switch to res_mysql and test again. Any advices will be highly appreciated.