EM 12c: Enterprise Manager is Unable to Connect to RAC Using the Scan Listener: IO Error: The Network Adapter could not establish the connection
(Doc ID 2202831.1)
Last updated on MARCH 12, 2021
Applies to:Enterprise Manager for Oracle Database - Version 184.108.40.206.0 and later
Information in this document applies to any platform.
Enterprise Manager is unable to connect to RAC using the SCAN Listener, failing with this console error:
Regions that display real-time data will not be displayed. Exception while loading RAC Database Home Page: IO Error: The Network Adapter could not establish the connection The Connect Descriptor was (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = proddb-scan.mycompany.com)(PORT = 1541))(CONNECT_DATA = (SERVICE_NAME = dbprod.mycompany.com)))
A SQL*Plus connection attempt gives this session error:
ORA-12545: Connect failed because target host or object does not exist
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