Subscription For Node Down Event Still Pending

I have seen today this warning into a listener log;

WARNING: Subscription for node down event still pending

These messages are related to the Oracle TNS Listener’s default subscription to the Oracle Notification Service (ONS). In a non-RAC environment it is recommended to disable this subscription.

You can disable this feature by set the nex parameter into your listener.ora file.

SUBSCRIBE_FOR_NODE_DOWN_EVENT_<listener_name>=OFF

For more information, you can refer to MOS, note 372959.1

HTH – Antonio NAVARRO

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