I\'ve just installed a nginx+php-fpm server. Everything seems fine except that PHP-FPM never writes error to its log.
fpm.conf
[default]
listen = /va
I had a similar issue and had to do the following to the pool.d/www.conf file
php_admin_value[error_log] = /var/log/fpm-php.www.log
php_admin_flag[log_errors] = on
It still wasn't writing the log file so I actually had to create it by touch /var/log/fpm-php.www.log then setting the correct owner sudo chown www-data:www-data /var/log/fpm-php.www.log.
Once this was done, and php5-fpm restarted, logging was resumed.