SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function query() on null in /var/www/html/application/libraries/drivers/mysql.php:100
Stack trace:
#0 /var/www/html/application/models/document_template.php(248): Mysql_Driver-&gt;queryexecute()
#1 /var/www/html/application/controllers/main.php(308): Document_Template_Model-&gt;GetListAvailableDocument()
#2 /var/www/html/application/controllers/router.php(67): Main_Controller-&gt;main(Array, Array)
#3 /var/www/html/index.php(25): require_once('/var/www/html/a...')
#4 {main}
  thrown in <b>/var/www/html/application/libraries/drivers/mysql.php</b> on line <b>100</b><br />