When configuring a business service URI in Oracle Service Bus, you must use the Oracle Traffic Director (OTD) host name, rather than the public IP address, if its metadata points to a service deployed on Oracle Weblogic Server in the same Oracle SOA Cloud Service environment.
When using a proxy server in the Oracle Service Bus configuration, use the real host name and use port 80.
Then the OTD host name is http://xz-osbxy-drop5-1vm-20-jcs-lb-1:8080