#6 PoolManConnectionHandle isClosed

[Paul Webber]

If you have a PoolManConnectionHandle and ask it
isClosed() the PoolManConnectionHandle only checks for
the existence of the variable PoolManConnection pcon.
This does not necessarily mean the connection is open.

A better check would be:
public boolean isClosed() throws SQLException
{
if (pcon != null && !pcon.isClosed())
{
return false;
}
return true;
}