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php fpm - Ubuntu - Nginx + php5-fpm - suddenly times out every request even after restart

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 127.0.0.1:9000 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

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