Caveat - Newbie nginx/php5-fpm/ubuntu

I inherited a couple linux boxes and have had the same thing happen on both. I assume it's user error, but for the life of me I don't know what I did.

Symptoms: server working ok nginx to php5-fpm and back. I run a cookbook (made by others) that go some git gyrations, sym links, etc. and composure updates. Generally things just work.

The most recent time, I wasn't seeing my latest code be served up (or perhaps cached somewhere??) and I did a sudo service php5-fpm restart.

After this last time, nothing goes through. NGINX complains of time outs on ever single call: 2016/02/09 16:06:26 [error] 24102#0: *1 upstream timed out (110: Connection timed out) while reading response header from upstream, client: xx.xx.xx.xx, server: yyy.yyyy.com, request: "GET /v2/phpinfo.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "yyy.yyyy.com"

I've restarted php5-fpm and nginx. I've updated configs for both to go to and demonstrated in each of the respective log files that they switched over. I then switched them back to the unix sock listed above.

I'm at a complete loss as to why they don't seem to hook up.

And I don't think I did anything other than restart php5-fpm. Does it matter which directory I'm in when I restarted php5-fpm?

Thanks for any help you can offer!

EDIT: I confirmed that the *.sock file disappeared when I went to the port 9000 and reappeared when I reconfigured. I even renamed the .sock file to test it, in case it mattered.

EDIT: PHP5-fpm log doesn't show much: [10-Feb-2016 09:12:20] WARNING: [pool www] child 26295 exited on signal 11 (SIGSEGV - core dumped) after 1383.735723 seconds from start [10-Feb-2016 09:12:20] NOTICE: [pool www] child 26346 started

from apport.log: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment

  • 1
    Check the web application. Feb 9, 2016 at 23:57
  • Check the application and php logs, post any relevant contents. Directory makes no difference to service restart.
    – Tim
    Feb 10, 2016 at 1:51
  • @MichaelHampton... Apache2 is installed but not running. This is an API only machine. It should just receive and serve up php files for JSON consumption. I don't know if there are other pieces I'm missing. What 'web application'? I'm hitting this with Postman JSON requests or even just trying to serve up phpinfo.php. Feb 10, 2016 at 16:51
  • @Tim, what other logs should I look into? I only know the nginx and php5-fpm. Feb 10, 2016 at 16:51
  • You don't just run PHP, you run an application written in PHP. Probably not relevant, but worth looking at. Given the core dump I might reinstall, but I'm not really an expert in this area. What does google say when you search for "SIGSEGV php5" or "SIGSEGV php5-fpm"?
    – Tim
    Feb 10, 2016 at 19:03

1 Answer 1


For me it turned out to be xdebug configuration. I'd been working to enable xdebug a few days ago to no avail. Nothing was even taking effect (affect?)

Last night it hit me that perhaps xdebug was hanging. I commented out the xdebug configuration, restarted PHP5-fpm and things freed up.

I, unfortunately, didn't see anything in any of the logs to point to XDEBUG config.

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