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Lost connection to MySQL server at 'reading initial communication packet', system error: 0 "Internal error/check (Not system error)"

1. Zend_Db_Adapter_Mysqli->_connect() in Zend/Db/Adapter/Abstract.php at line 315
2. Zend_Db_Adapter_Abstract->getConnection() in XenForo/Application.php at line 553
3. XenForo_Application->loadDb()
4. call_user_func_array() in XenForo/Application.php at line 780
5. XenForo_Application->lazyLoad() in XenForo/Application.php at line 810
6. XenForo_Application::get() in XenForo/Application.php at line 1099
7. XenForo_Application::getDb() in XenForo/Session.php at line 166
8. XenForo_Session->__construct() in XenForo/Install/Controller/Upgrade.php at line 43
9. XenForo_Install_Controller_Upgrade->_setupSession() in XenForo/Controller.php at line 298
10. XenForo_Controller->preDispatch() in XenForo/FrontController.php at line 309
11. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
12. XenForo_FrontController->run() in /home/u495541495/public_html/Forum/install/index.php at line 18

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