By default, the WebLogic Server Configuration Wizard sets Hostname Verification to Bea Hostname Verifier when creating the Oracle SOA Suite and Oracle Service Bus domains. Hostname Verification must be set to None for the Oracle Eloqua Cloud adapter to work.
To disable hostname verification.
Log in to the Oracle WebLogic Server Administration Console.
Under Domain > Environment > Servers, double-click the server name.
Click the SSL tab.
Under Advanced, update Hostname Verification to None.
Save the change.
If the domain has one administration server and one managed server, both servers must have Hostname Verification set to None.