Too many connections

FILE: F:\wwwroot\school51\ThinkPHP\Lib\Core\Db.class.php 　LINE: 323

[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Db.class.php (323) DbMysql->connect()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Driver\Db\DbMysql.class.php (187) Db->initConnect()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Driver\Db\DbMysql.class.php (425) DbMysql->query(SHOW COLUMNS FROM `common`)
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Model.class.php (269) DbMysql->getFields(common)
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Model.class.php (245) Model->flush()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Model.class.php (2347) Model->_checkTableInfo()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Model.class.php (195) Model->db(0, )
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Common\common.php (589) Model->__construct()
[25-05-18 02:34:05] F:\wwwroot\school51\school51-app\app\Common\WwwAction.php (69) D(Common)
[25-05-18 02:34:05] F:\wwwroot\school51\school51-app\app\Common\WwwAction.php (17) WwwAction->get_user_info()
[25-05-18 02:34:05] F:\wwwroot\school51\school51-app\app\CompanyApp\Lib\Action\EmptyAction.class.php (17) WwwAction->_initialize()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Action.class.php (113) EmptyAction->_initialize()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Common\common.php (691) Action->__construct()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\App.class.php (239) A(Empty)
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\App.class.php (423) App::exec()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Lib\Core\Think.class.php (77) App::run()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\Common\runtime.php (483) Think::start()
[25-05-18 02:34:05] F:\wwwroot\school51\ThinkPHP\ThinkPHP.php (59) require(F:\wwwroot\school51\ThinkPHP\Common\runtime.php)
[25-05-18 02:34:05] F:\wwwroot\school51\school51-app\Web\CompanyWeb\index.php (27) require(F:\wwwroot\school51\ThinkPHP\ThinkPHP.php)