Search notes:

ORA-47417: Oracle Database Vault administrative operations require database vault administrative roles.

The error can be thrown even if connected as sysdba: 
$ sqlplus / as sysdba
SQL> exec dbms_macadm.enable_oradebug

See also

dvsys.dba_dv_realm_auth
Other Oracle error messages

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1759474050, '216.73.216.42', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/errors/ORA-47417_Oracle-Database-Vault-administrative-operations-require-database-vault-administrative-roles(41): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78