[asterisk-users] Asterisk just stops working...

[Nicolas Ross]

My main asterisk server sometimes suddenly stop responding.

When I'm at work, I always have a ssh console opened with "asterisk -r" in 
it. I have 23 sip hard and soft phones. Normaly, when I do a "sip show 
peers", I see all 23 sip users and the command finishes with

23 sip peers [Monitored: 8 online, 15 offline Unmonitored: 0 online, 0 
offline]

for exemple.

Now, when my server begin not to respond, when I do a sip show peers, I only 
see a subset of the users, and not the summary line. If I do other commands 
like "core show channels", it simply shows nothing at all. Not even a "0 
active channels". Reload, or any other similar commands goes unansered. The 
"core" works as it still answers calls on the PRI, but sip extensions can't 
be reached, etc.

When it does this, I have to completly stop asterisk, often having to kill 
the processes, and then start it back again.

We have a PRI with MTS/Allstream on a sangoma quad-port card, one other port 
is used to hookup a dial-up RAS, another one is used to do a point-to-point 
link with our office.

The server is CentOS 5, and I am up to date with Asterisk 1.4.20.

On a local support forum, I have been suggested that I compile asterisk with 
DEBUG_THREADS and do a "core show locks" when it happens.

core show locks simply shows nothing...