How to reconnect lost connections with EclipseLink?

Question

I have the problem if the mySQL Server kills the session after 500 sec \"sleeping-time\", that the next request isn\'t successful. The same problem occurs after maybe 700 se

Answer 1

How have you configured your connection pool? If it a server datasource, the properties such as connection testing should be set in the server. See http://docs.oracle.com/cd/E21764_01/web.1111/e13737/ds_tuning.htm#i1199711 for example settings.

If it is an EclipseLink pool, it should automatically attempt to retry queries when it detects a connection failure by default. The properties controlling the behavior are only accessible through api in the DatabasePlaform class for your specific database, and can be set through a customizer as described here: How To modify Eclipselink JPA 2.0 connection retry behavior