4 Jan
2015
4 Jan
'15
12:22 a.m.
Thanks, Ovidiu. But since the message "core was not generated" comes
from handle_sigs() in Kamailio, what I am really interested is in what
reason Kamailio itself would have for not dumping core. I assume that
the situation would look different if Kamailio tried to dump core, but
was restrained from doing so by operating system factors such as ulimits.
From main.c:handle_sigs(), it appears that the log message came from here:
#ifdef WCOREDUMP
... LM_ALERT("core was %sgenerated\n", WCOREDUMP(chld_status) ? "" :
"not " );
#endif
WCOREDUMP() as I understand it allows one to examine the return code of
a dead child to determine if it returned a core dump. Is further
information available in such a case, like a kind of errno for such cases?
-- Alex
On 01/03/2015 05:00 PM, Ovidiu Sas wrote:
Pretty annoying problem :(
Here's how I enable core dumps on linux installs in sysctl (reboot required):
fs.suid_dumpable = 1
kernel.core_pattern = /tmp/core.%e.%u.%t
kernel.core_uses_pid = 1
On a live system (no need to restart):
echo 1 > /proc/sys/fs/suid_dumpable
echo 1 > /proc/sys/kernel/core_uses_pid
echo "/tmp/core.%e.%u.%t" > /proc/sys/kernel/core_pattern
Hope that now you will be able to "enjoy" the core dumps :-/
Regards,
Ovidiu Sas
On Sat, Jan 3, 2015 at 4:38 PM, Alex Balashov <abalashov(a)evaristesys.com> wrote:
--
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
Hi,
I recently had a simultaneous crash on three production instances of
Kamailio. Unfortunately, I have not been able to get to the bottom of the
issue because Kamailio refused to produce a core dump:
Dec 30 15:37:29 xxxxxx /usr/local/sbin/kamailio[13743]: ALERT: <core>
[main.c:784]: handle_sigs(): child process 13763 exited by a signal 11
Dec 30 15:37:29 xxxxxx /usr/local/sbin/kamailio[13743]: ALERT: <core>
[main.c:787]: handle_sigs(): core was not generated
I do not have disable_core_dump=yes (default is no), and checked ulimits for
limits on core file size. Kamailio was running as root, and there was no
limit.
What are the other reasons why Kamailio may not generate a core dump in such
a case?
Thanks!
-- Alex
--
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States
Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
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