MYSQL 8 Hours Time out Problem

I am using MYSQL 5.0 and Tomcat 5.5. After 8 hours , MYSQL closes by default all idle connections and so I am getting an SQL Exception .Any solution to this problem

Which connection pool are you using? Most allow a heartbeat command to be executed periodically to keep connections from idling out.

EDIT: Looking at the DBCP configuration page, I think you should set an appropriate (cheap) validationQuery. You could then either tell DBCP to test this when potentially evicting idle connections (testWhileIdle) or tell it to test just before returning the connection (testOnBorrow). The first would (hopefully!) keep your idle connections alive; the second wouldn’t, but wouldn’t return you broken connections (i.e. if would create a new one if necessary).