BlackSwan Messages: 17229 Registered: January 2009
Senior Member
Cause
These messages are related to the Oracle10g TNS Listener's default subscription to the Oracle Notification Service (ONS). In a non-RAC environment it is recommended to disable this subscription.
Solution
Set the following parameter in the listener.ora:
SUBSCRIBE_FOR_NODE_DOWN_EVENT_<listener_name>=OFF
Where <listener_name> should be replaced with the actual listener name configured in the
LISTENER.ORA file.
This will prevent the messages from being written to the log file, but also prevent the 10g TNS
Listener from hanging periodically.