asterisk users - Sep 2010 - How to create a coredump for Asterisk

Hi everybody,

sometimes we have an Asterisk-crash, but no clue why this is happening,
so I'm trying to make a coredump to analyse it.

I compiled Asterisk 1.4.20.1 on CentOS 5.4 i386 with "DEBUG_THREADS"
and
"DONT_OPTIMIZE", then I start it with:
 # /bin/bash /usr/sbin/safe_asterisk

This should do an "ulimit -c unlimited", but I entered it in the
terminal again.

A
 # ps -ef | grep asterisk
tells me that Asterisk is running as root and with the g-option for
writing a coredump:

root     21622     1  0 20:15 pts/0    00:00:00 /bin/bash
/usr/sbin/safe_asterisk
root     21627 21622  1 20:15 pts/0    00:00:00 /usr/sbin/asterisk -f
-vvvg -c

In the asterisk-start-script, the coredump-dir is configured as:
 DUMPDROP=/tmp

Unfortunately, if I kill all asterisk-processes with "kill -9 ...", a
coredump never is writen to "/tmp", I also looked in other dirs.

Any idea what is going wrong here?


Some links I found, but they do not help me:
http://www.asterisk.org/doxygen/trunk/AstDebug.html
http://www.voip-info.org/wiki/view/Asterisk+debugging
http://man.sourcentral.org/centos5/5+core
http://de.w3support.net/index.php?db=so&id=17965


Thanks a lot,
-- 

Chau y hasta luego,

Thorolf

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Thorolf Godawa
Subject: [asterisk-users] How to create a coredump for Asterisk

<snip>

Just my opinion, but Asterisk probably isn't going to dump when you kill the
process; something internal has to trigger it.

> Unfortunately, if I kill all asterisk-processes with "kill -9
...", a
> coredump never is writen to "/tmp", I also looked in other dirs.
Try kill -6 (i.e. SIGABRT). That usually triggers a core dump for me.

Luki

On Thu, Sep 2, 2010 at 2:26 PM, Thorolf Godawa <nospam at godawa.de>
wrote:
> Any idea what is going wrong here?
>
Read doc/backtrace.txt

If you cannot get Asterisk to coredump, try running it under gdb to
see what is happening.


-- 
Paul Belanger | dCAP
Polybeacon | Consultant
Jabber: paul.belanger at polybeacon.com | IRC: pabelanger (Freenode)
blog.polybeacon.com

Hi Luki an all others who answered,
> Try kill -6 (i.e. SIGABRT). That usually triggers a core dump for me.
yes, that works for testing and creates a coredump.

Thank you very much for your answer!

PS: Running Asterisk under GDB unfortunately is not an option, because
it is a production system and it only crashes very, very seldom. Normaly
it works for months without problems, but once Asterisk crashed 3 times
a day. Now the system works stable since some weeks again and we have no
clue why it crashed.
-- 

Chau y hasta luego,

Thorolf

On 12 September 2010 23:56, Thorolf Godawa <nospam at godawa.de> wrote:
> Hi Luki an all others who answered,
>
> > Try kill -6 (i.e. SIGABRT). That usually triggers a core dump for me.
> yes, that works for testing and creates a coredump.
>
> Thank you very much for your answer!
>
> PS: Running Asterisk under GDB unfortunately is not an option, because
> it is a production system and it only crashes very, very seldom. Normaly
> it works for months without problems, but once Asterisk crashed 3 times
> a day. Now the system works stable since some weeks again and we have no
> clue why it crashed.
> --
>
> Chau y hasta luego,
>
> Thorolf
>
>
Asterisk is a funny beast. I had one site running 1.4.22 for months and we
upgraded to 1.4.25 and it was segfault city! Back to .22 and all good
again... I really wonder about the quality control on release cycles...

 *duck*

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