attempt to connect to host was forcibly refused
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Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/drgus.htm
https://community.oracle.com/message/899297
https://community.oracle.com/message/143526
https://community.oracle.com/message/784031
https://community.oracle.com/message/781917
https://community.oracle.com/message/781861