Caught Exception: SQLSTATE[08004] [1040] Too many connections

ERROR@/var/www/swm/lib/Web/DB.php +25 --> Web_DB::connect
Caught Exception: No entry is registered for key 'db'

ERROR@/var/www/swm/lib/Web/Cart.php +24 --> Web_Cart::init
Caught Exception: No entry is registered for key 'db'

ERROR@/var/www/swm/lib/Web.php +118 --> Web::init
No default module defined for this application#0 /var/www/swm/vendor/zendframework/zendframework1/library/Zend/Controller/Dispatcher/Standard.php(204): Zend_Controller_Dispatcher_Standard->getControllerClass() #1 /var/www/swm/vendor/zendframework/zendframework1/library/Zend/Controller/Dispatcher/Standard.php(244): Zend_Controller_Dispatcher_Standard->isDispatchable() #2 /var/www/swm/vendor/zendframework/zendframework1/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch() #3 /var/www/swm/lib/Web.php(173): Zend_Controller_Front->dispatch() #4 /var/www/swm/lib/Web.php(124): Web::dispatch() #5 /var/www/swm/vhosts/cdn.southwestmedical.com/bootstrap.php(10): Web::clean() #6 /var/www/swm/vhosts/cdn.southwestmedical.com/bootstrap.php(27): Website::execute() #7 /var/www/swm/vhosts/cdn.southwestmedical.com/public/index.php(3): require('/var/www/swm/vh...') #8 {main}