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 NOVEMBER 19, 2016

Applies to:

Enterprise Manager for Oracle Database - Version 12.1.0.2.0 and later
Information in this document applies to any platform.

Symptoms

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:

ERROR:
ORA-12545: Connect failed because target host or object does not exist

 

 

Changes

 

Cause

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