ORA-00120
        invalid 'shared_servers' value for the PDB
        
        
        Cause
        'shared_servers' cannot be set to a non-zero value in a non-ROOT pluggable database (PDB).
        Action
        In a multitenant container database (CDB) setup, shared servers can be configured only in ROOT. A non-ROOT PDB can disable shared servers for the PDB by setting 'shared_servers' to 0.  No other values are allowed.  To reenable within the PDB, use 'alter system reset shared_servers'.
        
     
    
    
        ORA-00120
        invalid 'shared_servers' value for the PDB
        
        
        Cause
        'shared_servers' cannot be set to a non-zero value in a non-ROOT pluggable database (PDB).
        Action
        In a multitenant container database (CDB) setup, shared servers can be configured only in ROOT. A non-ROOT PDB can disable shared servers for the PDB by setting 'shared_servers' to 0.  No other values are allowed.  To reenable within the PDB, use 'alter system reset shared_servers'.
        
     
    
    
        ORA-00120
        invalid 'shared_servers' value for the PDB
        
        
        Cause
        'shared_servers' cannot be set to a non-zero value in a non-ROOT pluggable database (PDB).
        Action
        In a multitenant container database (CDB) setup, shared servers can be configured only in ROOT. A non-ROOT PDB can disable shared servers for the PDB by setting 'shared_servers' to 0.  No other values are allowed.  To reenable within the PDB, use 'alter system reset shared_servers'.