An error occured in /jet/app/www/mz/library/Zend/Db/Adapter/Pdo/Abstract.php (line: 0): [0] SQLSTATE[HY000] [1040] Too many connections

Backtrace:
#0 /jet/app/www/mz/library/Zend/Db/Adapter/Abstract.php(270): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /jet/app/www/mz/library/Dgn/Bootstrap.php(134): Zend_Db_Adapter_Abstract->getConnection()
#2 /jet/app/www/mz/library/Dgn/Bootstrap.php(27): Dgn_Bootstrap->setupDatabase()
#3 /jet/app/www/mz/application/bootstrap.php(13): Dgn_Bootstrap->__construct('/jet/app/www/mz', 'dgn.ini', 'default')
#4 /jet/app/www/mz/index.php(3): Bootstrap::run('/jet/app/www/mz')
#5 {main}

Exception:
object(Zend_Db_Adapter_Exception)#19 (8) {
  ["_chainedException":protected]=>
  NULL
  ["message":protected]=>
  string(43) "SQLSTATE[HY000] [1040] Too many connections"
  ["string":"Exception":private]=>
  string(0) ""
  ["code":protected]=>
  int(0)
  ["file":protected]=>
  string(56) "/jet/app/www/mz/library/Zend/Db/Adapter/Pdo/Abstract.php"
  ["line":protected]=>
  int(130)
  ["trace":"Exception":private]=>
  array(5) {
    [0]=>
    array(6) {
      ["file"]=>
      string(52) "/jet/app/www/mz/library/Zend/Db/Adapter/Abstract.php"
      ["line"]=>
      int(270)
      ["function"]=>
      string(8) "_connect"
      ["class"]=>
      string(28) "Zend_Db_Adapter_Pdo_Abstract"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(0) {
      }
    }
    [1]=>
    array(6) {
      ["file"]=>
      string(41) "/jet/app/www/mz/library/Dgn/Bootstrap.php"
      ["line"]=>
      int(134)
      ["function"]=>
      string(13) "getConnection"
      ["class"]=>
      string(24) "Zend_Db_Adapter_Abstract"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(0) {
      }
    }
    [2]=>
    array(6) {
      ["file"]=>
      string(41) "/jet/app/www/mz/library/Dgn/Bootstrap.php"
      ["line"]=>
      int(27)
      ["function"]=>
      string(13) "setupDatabase"
      ["class"]=>
      string(13) "Dgn_Bootstrap"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(0) {
      }
    }
    [3]=>
    array(6) {
      ["file"]=>
      string(41) "/jet/app/www/mz/application/bootstrap.php"
      ["line"]=>
      int(13)
      ["function"]=>
      string(11) "__construct"
      ["class"]=>
      string(13) "Dgn_Bootstrap"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(3) {
        [0]=>
        string(15) "/jet/app/www/mz"
        [1]=>
        string(7) "dgn.ini"
        [2]=>
        string(7) "default"
      }
    }
    [4]=>
    array(6) {
      ["file"]=>
      string(25) "/jet/app/www/mz/index.php"
      ["line"]=>
      int(3)
      ["function"]=>
      string(3) "run"
      ["class"]=>
      string(9) "Bootstrap"
      ["type"]=>
      string(2) "::"
      ["args"]=>
      array(1) {
        [0]=>
        string(15) "/jet/app/www/mz"
      }
    }
  }
  ["previous":"Exception":private]=>
  NULL
}