Send Port to internally hosted IIS web service needs to run on the SAME IIS SERVER from multiple orchestrations

Question

Hi
We have a multi-server BizTalk environment. We have an Orchestration with multiple call orchestrations in it. Each called orchestration is calling a web service through a 2 way Send Port (which is hosted in IIS on each BizTalk server in our multi server
environment). We have to ensure that each called orchestration is calling these web services on the same IIS server.
I could create a dedicated host instance that the Send Port runs under to run only on one server but then this means that all our DBase traffic is happening on one server. We also thought about using the load balancer some how to achieve this through sticky
sessions etc.
This is all necessary because we are using Entity Framework exposed through web services and we need to manage transactions.
Any ideas on how we may achieve this. I have inserted a picture to try and show the scenario
Biztalk Developer

Answer 1

Haha, Entity Framework strikes again!  But seriously, that is a rather odd architectural requirement, double check first. But anyway...
Try this: Configure the Send Port URI to point to something like http://localservicehost/[yourEFService]
Then in the local hosts file (the DNS/IP hosts file), define localservicehost to the local IP address where the service is listening.
That way, the connection will always be made to the local machine.  Essentially the same as localhost.