ORA-00121

Error: ORA-00121: SHARED_SERVERS specified without DISPATCHERS

Causa: A definition for SHARED_SERVERS was specified in the initialization parameter file, but no definition for DISPATCHERS was specified. Without a value for DISPATCHERS, shared servers will never be used.

Acción: Add a definition for DISPATCHERS in the initialization parameter file (or remove the definition for SHARED_SERVERS, if shared servers are not being used).