The following is the ORA-24398 error message, you can learn the cause and solution of the Oracle database error.
ORA-24398 connection pool already exists
Cause: A connection pool has already been created for the specified pool handle.
Solution: 1) Specify a different pool handle to create a new connection pool. 2) If you wish to modify the pool parameters, call OCIConnectionPoolCreate in OCI_CPOOL_REINITIALIZE mode.
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