nginx reload sometimes not working(worker processes still alive)

[Maxim Dounin]

Hello!

On Wed, Apr 15, 2015 at 09:31:21AM -0400, cobain86 wrote:

> hi
> i'm not sure if this is an nginx or pagespeed or maybe linux problem
> 
> we're using nginx on RedHat
> Linux  2.6.32-504.8.1.el6.x86_64 #1 SMP Fri Dec 19 12:09:25 EST 2014 x86_64
> x86_64 x86_64 GNU/Linux
> 
> nginx1.6.2 with pagespeed 1.9.32.3beta:
> nginx version: nginx/1.6.2
> built by gcc 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC)
> TLS SNI support enabled
> configure arguments: --sbin-path=/usr/sbin/nginx
> --conf-path=/etc/nginx/nginx.conf --pid-path=/var/run/nginx.pid
> --lock-path=/var/lock/subsys/nginx --error-log-path=/var/log/nginx/error.log
> --http-log-path=/var/log/nginx/access.log --with-http_ssl_module
> --with-http_stub_status_module --with-http_geoip_module
> --http-client-body-temp-path=/var/cache/nginx/client_body_temp
> --http-proxy-temp-path=/var/cache/nginx/proxy_temp
> --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_tempmake
> --add-module=/tmp/nginx-1.6.2/ngx_pagespeed-1.9.32.3-beta
> 
> our problem is, since we have added the new pagespeed version, our reload
> wont work properly.
> we're using the following command to reload our nginx.
> 
> "nginx -s reload"
> 
> sometimes it happens that the master process is killed, but the worker
> process of the old master process are still running.
> So we are not able to start a new master process while the old workers are
> still there.
> We have no idea why this happens.
> 
> the message log file shows the following error:
> Apr 15 11:20:51  kernel: nginx[11423]: segfault at 7 ip 000000000047bbe3 sp
> 00007fffdd7740f0 error 4 in nginx[400000+957000]
> Apr 15 11:20:51  init: nginx main process (11423) killed by SEGV signal
> Apr 15 11:20:51  init: nginx main process ended, respawning
> Apr 15 11:20:55  init: nginx main process (6642) terminated with status 1
> Apr 15 11:20:55  init: nginx main process ended, respawning
> 
> i have also make/installed pagespeed and nginx again, but no solution for
> that.
> 
> does anybody has that problem? or has an idea what i to do?

>From your description it looks like a pagespeed problem.  For 
additional details you may try obtaining a stack trace, see some 
hints here: 

http://wiki.nginx.org/Debugging

-- 
Maxim Dounin
http://nginx.org/