oracle.jdbc.pool not killing extra connections

[Richard Johnstone <Ri...@appleyard-contracts.co.uk>]

I have a connection pool based on OracleConnectionCacheImpl from
oracle.jdbc.pool
When I want a connection I call getConnection and it all works fine.
When I start to up the usage on the site It has to create a few new
connections which is ok, but when these new connections are finished
with, they aren't being killed.
I am using connection.close() to close the connection.
Do I need to do something with the connection pool (a clean up or
something?)
I can't see any methods for it which seem to do such a thing

Help
Rich