This diagram shows a cluster topology that contains three hosts. Host1 contains an Oracle HTTP Server instance, which is routing requests to two separate OC4J instances (OC4J1 and OC4J2) on Host2. A third host (Host3) contains a third OC4J instance (OC4J3).

Three applications are deployed on OC4J1 and OC4J2 on Host2: ascontrol, faqApp, and myApplication01. The ascontrol application on both OC4J1 and OC4J2 is down, but the faqApp and myApplication01 are both running and receiving customer requests from the Oracle HTTP Server through the AJP protocol. Customers are accessing the faqApp and myApplication01 through the following URLs:

http://host1.acme.com:7777/faqApp
http://host1.acme.com:7777/myApplication01

No requests from the Oracle HTTP Server are being routed to OC4J3 because it is now using the HTTP protocol and its own HTTP listener. OC4J3 on Host3 contains only the ascontrol application, which is up and running. OC4J3 is receiving HTTP requests from Oracle Application Server administrators who are using the active ascontrol on OC4J3. Administrators are viewing the ascontrol application through the following URL:

http://host3.acme.com:7778/em