JobScheduler reconnect a MySQL connection when it was closed because wait_timeout

If JobScheduler using MySQL and the connection is longer inactive as the value of the "Server System Variables" wait_timeout then the server closes it and an error message like

The last packet successfully received from the server was xxx,xxx,xxx milliseconds ago.  
The last packet sent successfully to the server was xxx,xxx,xxx milliseconds ago. is longer than the server configured value of 'wait_timeout'.

is thrown.

In this case the JobScheduler should reconnect automatically.