Oracle process could not answer incoming connection
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Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/e0.htm
https://community.oracle.com/message/9962971
https://community.oracle.com/message/11222138
https://community.oracle.com/message/7434131
https://community.oracle.com/message/10150174
https://community.oracle.com/message/11289541