nginx-access.log

50.115.209.83 - - [31/Jan/2014:19:04:06 +0000] "GET /2012/ruby/the-urbanairship-gem-sending-push-notifications-with-ruby/ HTTP/1.0" 500 155 "-" "WordPress/3.5.2; https://engineering.groupon.com" "-" "-" "-" "-" "-" "-" "-" "engineering.groupon.com" "-" "-" "-" "0.018" "0.006" "-" "1391195046.260" "-" "-"
[snipped several hundred 500 responses]
77.100.245.124 - - [31/Jan/2014:19:09:41 +0000] "GET /feed HTTP/1.1" 500 193 "-" "-" "-" "-" "-" "-" "-" "-" "-" "engineering.groupon.com" "-" "-" "-" "0.343" "0.001" "-" "1391195381.451" "-" "-"
85.17.156.99 - - [31/Jan/2014:19:09:59 +0000] "GET / HTTP/1.1" 200 81540 "-" "Pingdom.com_bot_version_1.4_(http://www.pingdom.com/)" "-" "-" "-" "-" "-" "-" "-" "engineering.groupon.com" "-" "-" "-" "2.103" "1.194" "-" "1391195399.526" "-" "-"

nginx-error.log

2014/01/31 19:04:05 [error] 27194#0: *9413211 readv() failed (104: Connection reset by peer) while reading upstream, client: 199.59.148.211, server: engineering.groupon.com, request: "GET /2013/misc/i-tier-dismantling-the-monoliths/ HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "engineering.groupon.com"

php-fpm.log

[29-Jan-2014 00:18:08.948523] DEBUG: pid 22553, fpm_children_make(), line 421: [pool www] child 22606 started
[29-Jan-2014 00:18:08.948564] DEBUG: pid 22553, fpm_event_loop(), line 366: 58912 bytes have been reserved in SHM
[29-Jan-2014 00:18:08.948574] NOTICE: pid 22553, fpm_event_loop(), line 367: ready to handle connections
[31-Jan-2014 19:04:05.454650] DEBUG: pid 22553, fpm_got_signal(), line 76: received SIGCHLD
[31-Jan-2014 19:04:05.465270] WARNING: pid 22553, fpm_children_bury(), line 252: [pool www] child 22574 exited with code 1 after 240356.532905 seconds from start
[31-Jan-2014 19:04:05.465851] NOTICE: pid 22553, fpm_children_make(), line 421: [pool www] child 4477 started
[31-Jan-2014 19:04:05.465881] DEBUG: pid 22553, fpm_event_loop(), line 419: event module triggered 1 events
[31-Jan-2014 19:09:54.597879] DEBUG: pid 22553, fpm_got_signal(), line 85: received SIGTERM
[31-Jan-2014 19:09:54.597905] NOTICE: pid 22553, fpm_got_signal(), line 86: Terminating ...
[31-Jan-2014 19:09:54.597913] DEBUG: pid 22553, fpm_pctl(), line 231: switching to 'terminating' state
[31-Jan-2014 19:09:54.597933] DEBUG: pid 22553, fpm_pctl_kill_all(), line 159: [pool www] sending signal 15 SIGTERM to child 4477
[31-Jan-2014 19:09:54.597944] DEBUG: pid 22553, fpm_pctl_kill_all(), line 159: [pool www] sending signal 15 SIGTERM to child 22606