I'm having loads of weird issues on Magento CE 126.96.36.199. During normal operations, the site will occasionally produce a Magento Error Page (There has been an error processing your request) on both frontend and backend. Viewing the associated report, I see the following message:
"SQLSTATE[HY000]  MySQL server has gone away"
Sometimes, but more rarely, the report message will read:
Connection reset by peer
I have looked at the var > log > system.log and the
MySQL has gone away error is accompanied by the following:
Warning: PDO::__construct(): MySQL server has gone away in /var/www/html/domain.com/live/lib/Zend/Db/Adapter/Pdo/Abstract.php on line 129 Error while reading greeting packet. PID=1863 in /var/www/html/domain.com/live/lib/Zend/Db/Adapter/Pdo/Abstract.php on line 129
In addition to this, the following error seems to be happening on every request, as well as the
MySQL has gone away errors:
Warning: include(File.php): failed to open stream: No such file or directory in /var/www/html/domain.com/live/lib/Varien/Autoload.php on line 93 Warning: include(): Failed opening 'File.php' for inclusion
I have looked most of the articles I can find about this and tinkered with the database parameters till the cows came home but the error remains.
After following another QnA about the compiler, I notice that the admin page System > Tools > Compilation is completely blank. I think these are all related errors but any insight into debugging or causes would be so helpful.
I apologise if this is incoherent; I've been awake for about 42 hours, so please ask for any clarification. Thank you.
-- update --
My server stack for clarity:
PHP 5.5.4 (PHP-FPM) Nginx 1.4.2 MySQL 5.5.33
-- update --
It occurs to me (after some sleep) that I never specified - the PHP codebase and the MySQL db are on separate hardware servers - very important to know if ya'll are going to help me!! I apologise.