If one SOA composite application invokes another SOA composite application on another host through direct binding, and both composites are on hosts with the same server name and domain name, the invocation fails.

This is because the Oracle WebLogic Server transaction subsystem requires the domain names and server names to be different for transaction management to work properly. The transaction subsystem uses these names to track the location of a server related to a transaction. If the two servers in the invocation have the same name, the transaction subsystem can mistakenly confuse the two servers.

Ensure that you use hosts with separate server names and domain names.