we are using Spring-iBATIS for our application,we are using normal DBCP
Connection pooling configured in Spring,the problem we are facing here is
after running the application for sometime nearly 40 minutes,it got stopped
and not allowing further operations .

Environment :

Windows server 2003
32-bit Pc
JBoss 4.0.2 AS
Oracle - 9i

Can you suggest us the reason ,
Is it because of not using connection pooling or not implementing load balancing in JBoss server,

Immediate answer would be greatly appreciated.