random 502 gateway errors with nginx php-fpm and ubuntu

Question

I was having an issue with random 502 gateway errors using nginx and php-fpm. In my case I discovered a scenario where various php.ini error_log settings and error_reporting lev

Answer 1

If above steps don't help you solve your issue, check if you have eaccelerator enabled.

Disable it globally by disabling the load .so entry in either your php.ini or php.d/eaccelerator.ini

All problems are gone. Seems like the accellerator fails in certain situations in combination with php-fpm.