'WARNING: Subscription for node down event still pending' in Listener Log

This is a single instance database 11.2.0.3 running on RHEL box.

This is related to the Oracle TNS Listener's default subscription to the Oracle Notification Service (ONS). It is recommended to disable this subscriptionIn a non-RAC environment.

Work around for this is to modify the listener.ora file to include the following:

SUBSCRIBE_FOR_NODE_DOWN_EVENT_<listener_name>=OFF


Then reload or restart the listener.


$ lsnrctl reload  <listener_name>


or


$lsnrctl stop <listener_name>


$lsnrct; start <listener_name>