Oracle Error Message
ORA-24396: invalid attribute set in server handle
Reason for the Error
Attribute OCI_ATTR_NONBLOCKING_MODE has been set on the server handle and attached in OCI_POOL mode. Connection pooling does not support non blocking mode.
Solution
Do not set the OCI_ATTR_NONBLOCKING_MODE attribute on the server handle while attaching in OCI_POOL mode.