Why Does JON Need Execute On SYS.DBMS_SYSTEM?

Issue

• I'm trying to install JON and I'm following the instructions at http://docs.redhat.com/docs/en-US/JBoss_Operations_Network/2.4/html/Installation_Guide/JON_Server_Installation.html

• Step 5 of Section 2.1.2.2 calls for the following permissions:

  GRANT SELECT ON sys.dba_pending_transactions TO rhqadmin;
  GRANT SELECT ON sys.pending_trans$ TO rhqadmin;
  GRANT SELECT ON sys.dba_2pc_pending TO rhqadmin;
  GRANT EXECUTE ON sys.dbms_system TO rhqadmin;
  

• Our DBA would like to know why JON needs Execute on SYS.DBMS_SYSTEM?