Help Desk Ticket Reference: https://c.na7.visual.force.com/apex/Case_View?id=500A0000007rtNk&sfdc.override=1
project_key: SOA

We are using ESB to proxy a webservice.  HttpRouter is used to forward the request to the actual service.

It works well when there is only one service, when there is multiple services, the endpointUrl will be override by last ESB service.
for example, if you config the esb services like below 
ESB service01 route to actual service01
ESB service02 route to actual service02
ESB service0n route to actual service0n
ESB service01/02/03 will all route requests to the endpointUrl of service0n.