Unable to start Oracle Enterprise Dashboard

Document ID : KB000106808
Last Modified Date : 16/07/2018
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Issue:
Error found in enterprisedashboard.log

2018-07-16 15:44:37,864Z (11:44) [main] ERROR dradis.Application - Exception: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection

 
Cause:
The Oracle listener was still down.
Resolution:
Once listener started it resolved this issue.
 
Additional Information:
​http://www.dba-oracle.com/t_network_adapter_could_not_establish_connection.htm