Timer entries are deleted on server Shutdown

Hi,

I am trying to work the Timer-Service but somehow I am not successful. I hope to find some help in here.

I am running a Glassfish 4 and configured the resource "jdbc/__TimerPool" to persist into my MySQL database.
All Timers are persisted into my database, but as soon as I shutdown the Glassfish all Timers are deleted from the table.

Does anyone know how to make the timer stay persistet even after server restart?

Thank you very much,
arres