Uncaught exception thrown in shutdown function.

PDOException: SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute.: DELETE FROM {semaphore} WHERE (value = :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => 1671950331674189f7555498.88622680 ) in lock_release_all() (line 269 of /var/www/vhosts/dientucuocsong.vn/httpdocs/includes/lock.inc).