Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 2006 MySQL server has gone away' in /var/www/html/includes/database/database.inc:2204 Stack trace: #0 /var/www/html/includes/database/database.inc(2204): PDOStatement->execute(Array) #1 /var/www/html/includes/database/database.inc(683): DatabaseStatementBase->execute(Array, Array) #2 /var/www/html/includes/database/database.inc(2383): DatabaseConnection->query('SELECT expire, ...', Array, Array) #3 /var/www/html/includes/lock.inc(167): db_query('SELECT expire, ...', Array) #4 /var/www/html/includes/lock.inc(146): lock_may_be_available('schema:runtime:...') #5 /var/www/html/includes/bootstrap.inc(433): lock_acquire('schema:runtime:...') #6 /var/www/html/includes/bootstrap.inc(455): DrupalCacheArray->set(Array) #7 [internal function]: DrupalCacheArray->__destruct() #8 {main} thrown in /var/www/html/includes/database/database.inc on line 2204