title: Message: Configured database connection is persistent. Aborting
body: <p>Codeigniter 2 to 3 version after upgrading, I get this error..
  Why would that be?</p>
  
  <p>An uncaught Exception was encountered</p>
  
  <p>Type: Exception</p>
  
  <p>Message: Configured database connection is persistent. Aborting.</p>
  
  <p>Filename: /var/www/vhosts/xxx.com/app/system/libraries/Session/drivers/Session_database_driver.php</p>
  
  <p>Line Number: 94</p>
  
  <p>Backtrace:</p>
  
  <p>File: /var/www/vhosts/xxx.com/app/application/core/MY_Controller.php
  Line: 11
  Function: __construct</p>
  
  <p>File: /var/www/vhosts/xxx.com/app/application/core/MY_Controller.php
  Line: 52
  Function: __construct</p>
  
  <p>File: /var/www/vhosts/xxx.com/app/application/controllers/Dashboard.php
  Line: 7
  Function: __construct</p>
  
  <p>File: /var/www/vhosts/xxx.com/application/index.php
  Line: 293
  Function: require_once</p>