I'm using asterisk on Centos 6.5 for a few years now. Last time, it "freezes" often when doing a "core reload".
After the "freeze" the Recv-Q from port 5060/UDP is filling up and all registrations and devices which are on UDP are going offline.
Only solution to get it up and running again is to kill the asterisk process and start it over again.
We have this issue a few months now but in the beginning it was occasionly, last week it occurs in more than 50% off the reloads.
We tried different asterisk versions, from 11.7 to 11.25.
What could we do to troubleshoot this issue?