Summary of Changes

After mysql crash on heavy query (or mysql server is working for a long time) session can not be saved because connection fails.

I have got below errors:

[18-Nov-2017 16:06:09 Europe/Berlin] PHP Warning:  mysqli_errno() expects parameter 1 to be mysqli, boolean given in .../libraries/joomla/database/driver/mysqli.php on line 987
[18-Nov-2017 16:06:09 Europe/Berlin] PHP Warning:  mysqli_error() expects parameter 1 to be mysqli, boolean given in .../libraries/joomla/database/driver/mysqli.php on line 999
[18-Nov-2017 16:06:09 Europe/Berlin] PHP Warning:  Invalid argument supplied for foreach() in .../components/com_content/models/articles.php on line 612
[18-Nov-2017 16:06:09 Europe/Berlin] PHP Warning:  Invalid argument supplied for foreach() in .../modules/mod_articles_latest/helper.php on line 122
[18-Nov-2017 16:06:09 Europe/Berlin] PHP Warning:  Invalid argument supplied for foreach() in .../templates/.../html/mod_articles_latest/default.php on line 13

and in apache2 error:

PHP Warning:  session_write_close(): Failed to write session data (user). Please verify that the current setting of session.save_path is correct (/var/lib/php/sessions) in .../libraries/joomla/session/handler/native.php on line 201

Testing Instructions

Core review.

For me it only takes 1 second to start mysql again. Less value does not work.

Expected result

After a query fails because mysql crash do not block session to save data by connection fails.