Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[08004] [1040] Too many connections in variable_initialize() (line 927 of /home/vhost/campusfrance/www/includes/bootstrap.inc).

Additional

Predis\Connection\ConnectionException: Error while reading line from the server [tcp://194.110.165.108:6379] in Predis\Connection\AbstractConnection->onConnectionError() (line 141 of /home/vhost/campusfrance/www/sites/all/libraries/predis/lib/Predis/Connection/AbstractConnection.php).