osa-dispatcher won't start and encounters 'Connection attempt failed', 12546, 'ORA-12546: TNS:permission denied\n' with Satellite using an external Oracle database

Issue

• Installed Red Hat Network Satellite to use an external Oracle database.
• Currently the Red Hat Network Satellite works but osa-dispatcher service doesn't start correctly:

[root@satellite ~]# /usr/sbin/rhn-satellite start
Starting spacewalk services...                                     
Initializing jabberd processes ...                                 
Starting router:                                           [  OK  ]
Starting sm:                                               [  OK  ]
Starting c2s:                                              [  OK  ]
Starting s2s:                                              [  OK  ]
Starting tomcat6:                                          [  OK  ]
Starting httpd:                                            [  OK  ]   
Starting osa-dispatcher: RHN 11640 2012/09/04 10:31:29 +02:00: ('Connection attempt failed', 12546, 'ORA-12546: TNS:permission denied\n')
RHN 11640 2012/09/04 10:31:29 +02:00: ('Error caught:',)                                             
RHN 11640 2012/09/04 10:31:29 +02:00: ('Traceback (most recent call last):\n  File "/usr/share/rhn/osad/jabber_lib.py", line 119, in main\n    self.setup_config(config)\n  File "/usr/share/rhn/osad/osa_dispatcher.py", line 81, in setup_config\n    rhnSQL.initDB()\n  File "/usr/share/rhn/server/rhnSQL/__init__.py", line 121, in initDB\n    __init__DB(backend, host, port, username, password, database)\n  File "/usr/share/rhn/server/rhnSQL/__init__.py", line 52, in __init__DB\n    __DB.connect()\n  File "/usr/share/rhn/server/rhnSQL/driver_cx_Oracle.py", line 385, in connect\n    raise apply(sql_base.SQLConnectError, err_args)\nSQLConnectError: (12546, \'ORA-12546: TNS:permission denied\\n\', \'SATDB\', \'Connection_Connect(): server attach\')\n',)
                                                           [  OK  ]   
...

[root@satellite ~]# service osa-dispatcher restart
Shutting down osa-dispatcher:                              [  OK  ]
Starting osa-dispatcher: RHN 30320 2012/11/05 15:00:58 +02:00: ('Connection attempt failed', 12546, 'ORA-12546: TNS:permission denied\n')
RHN 30320 2012/11/05 15:00:58 +02:00: ('Error caught:',)
RHN 30320 2012/11/05 15:00:58 +02:00: ('Traceback (most recent call last):\n  File "/usr/share/rhn/osad/jabber_lib.py", line 119, in main\n    self.setup_config(config)\n  File "/usr/share/rhn/osad/osa_dispatcher.py", line 81, in setup_config\n    rhnSQL.initDB()\n  File "/usr/share/rhn/server/rhnSQL/__init__.py", line 121, in initDB\n    __init__DB(backend, host, port, username, password, database)\n  File "/usr/share/rhn/server/rhnSQL/__init__.py", line 52, in __init__DB\n    __DB.connect()\n  File "/usr/share/rhn/server/rhnSQL/driver_cx_Oracle.py", line 385, in connect\n    raise apply(sql_base.SQLConnectError, err_args)\nSQLConnectError: (12546, \'ORA-12546: TNS:permission denied\\n\', \'SATDB\', \'Connection_Connect(): server attach\')\n',)
                                                           [  OK  ]