Mysql has gone away

gistfile1.php

public function processJob($job)
{
        try {
            // stuff
        } catch(Exception $e) {
            if(Offers\Model::getDb()->errno() == 2006) {
                Offers\Model::connectDb();
                $this->processJob($job);
            } else {
                throw $e;
            }
        }
}