beacon\DBException: SQLSTATE[HY000] [2002] Cannot assign requested address
    #0 /home/www/www.com/beacon/core/DB.php(355): beacon\DB::engine()
    #1 /home/www/www.com/app/school/controller/Node.php(25): beacon\DB::getRow()
    #2 /home/www/www.com/vendor/wj008/beacon/core/Route.php(629): app\school\controller\Node->initialize()
    #3 /home/www/www.com/vendor/wj008/beacon/core/Route.php(744): beacon\Route::runMethod()
    #4 /home/www/www.com/www/index.php(87): beacon\Route::run()
    #5 {main}
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