ORA-12541 with connections made to an 11.2 RAC DB through a SCAN Listener but the Listeners are all up
Last updated on DECEMBER 06, 2015
Applies to:Oracle Net Services - Version 18.104.22.168 and later
Information in this document applies to any platform.
Connections to an 11.2 RAC Database using SCAN are either failing consistently or 50% of the time with ORA-12541 "no listener"
This is the case despite confirming that the Listeners are all running on the designated addresses and a tnsping against the connection alias reveals no differences in the address used by the Client
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