Keep Alive piles up

[Maxim Dounin]

Hello!

On Thu, Jun 25, 2009 at 06:25:17PM -0400, meto wrote:

> So i've checked and 0.7.61 seems to have similar behaviour (http://xgame.pl/nginx/)
> 
> In logs the only suspicious thing was:
> 
> 2009/06/25 23:38:09  19083#0: worker process 19088 exited on signal 11
> 
> and some others similar, always signal 11.

Yep, it's died on SIGSEGV.

> So how to make coredump? I've got --with-debug package :)

It depends on your OS.  Under FreeBSD it should be enough to do:

sysctl kern.sugid_coredump=1
sysctl kern.corefile="/var/coredumps/%N.%P.core"

(and create writeable /var/coredumps directory of course, more 
details may be found in core(5) manual page).

I don't know exact steps to enable coredumps under Linux, but 
http://marc.info/?l=nginx&m=120127270808830&w=2 suggests you 
should use

echo 1 > /proc/sys/fs/suid_dumpable

or

echo 1 > /proc/sys/kernel/suid_dumpable

depending on Linux version, and add to nginx config something 
like:

worker_rlimit_core   100m;
working_directory    /path/to/core/files;

Once you have corefile please do

gdb /path/to/nginx /path/to/core
bt

and post backtrace here.

Maxim Dounin