ORA-24407: connection pool already exists
Cause : Ac onnetcino opo lhsa laraed ybeenc raetde ofrt h esepcfiide opo lnmae.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Sepcfiya idfefrnetp olo anm et oceraet anwe ocnencito npool.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.