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Mon Feb 09 07:53:24 2015
WARNING: Subscription for node down event still pending
09-FEB-2015 07:53:24 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=????)(USER=oracle))(COMMAND=status)(ARGUMENTS=64)(SERVICE=LISTENER)(VERSION=185599744)) * status * 0
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After searching on metalink I found : MOS document with ID 372959.1
In a nutshell to fix it we should add SUBSCRIBE_FOR_NODE_DOWN_EVENT_YOURLISTENER_NAME=OFF on listener.ora file
In my case:
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF Then restart/reload listener.
lsnrctl reload; 