Oracle SOA Suite provides support for specifying multiple partner link endpoint locations. This capability is useful for failover purposes if the first endpoint is down. To provide an alternate partner link endpoint location, add the location attribute to the composite.xml file. The following provides an example.

<reference name="HeaderService ...>
<binding.ws port="http://services.otn.com/HelloWorldApp#wsdl.endpoint(client/
  HelloWorldService_pt)"
location="http://server:port/soa-infra/services/default/ 
 HelloWorldService!1.0/client?WSDL">
<property name="endpointURI">http://jsmith.us.example.com:80/a.jsp 
@http://myhost.us.example.com:8888/soa-infra/services/HelloWorldApp/HelloWorld!
1.0*2007-10-22_14-33-04_195/client
 </property>
</binding.ws>
</reference>