Well, in Joomla 3.3+ line 210 is in the
disconnect() method the the
JDatabaseDriverMysqli class, it's literally the
msqli_close() call in the method shown below.
* Disconnects the database.
* @return void
* @since 12.1
public function disconnect()
// Close the connection.
foreach ($this->disconnectHandlers as $h)
call_user_func_array($h, array( &$this));
$this->connection = null;
If you're only getting the error on this line it may not be an issue but it's likely you're getting the same error on other line numbers as well. This indicates that due to server resource issue (e.g. memory or processing timeouts/limitations) the PHP instance isn't getting a valid response from
I would ask your hosting provider to investigate.