Until now, I usually have used the Logic App adapter to send messages to Azure Logic Apps and extend the BizTalk Server capabilities with the Azure Services. Yesterday, once I was trying the inverse capabilities, i.e., receiving a message from Logic App into BizTalk Server using the Logic App Adapter and, of course, the BizTalk Server Connector available on Logic App. I was surprised with the following error while I was trying to access the exposed service to receive messages from Logic App:
Receive location for address “/LogicAppTestServoce/Service1.svc” not found. (The BizTalk receive location may be disabled.)
This is a common error. It means that the Receive Location doesn’t exist or it is disabled. So I went to the BizTalk Server Administration Console and Enabled the Receive Location, but it automatically disabled again.
Once I check the Event Viewer for errors I found the 3 following errors:
The Messaging Engine encountered an error when creating the receive adapter “LogicApp”. The Assembly is: “Microsoft.BizTalk.Adapter.LogicApp.Runtime.LogicAppReceiver, Microsoft.BizTalk.Adapter.LogicApp.Runtime”. The error occurred because the component does not implement the mandatory interface “IBTTransportControl”.
The Messaging Engine failed to add a receive location “POC_LOGICAPP_TO_BIZTALK_LA” with URL “/LogicAppTestService/Service1.svc” to the adapter “LogicApp”. Reason: “80070057”.
The receive location “POC_LOGICAPP_TO_BIZTALK_LA” with URL “/LogicAppTestService/Service1.svc” is shutting down. Details:”The Messaging Engine failed while notifying an adapter of its configuration. “.
There is a critical bug in the default installation of the Logic App adapter that will affect the process of receiving messages from Logic Apps using the BizTalk Server Connector.
The Logic App Receive handler, or what we usually call the Logic App Receive adapter, is, by default, configured to use the default In-Process Host, normally the BizTalkServerApplication, in this case, as you saw in the picture bellow BizTalkServerReceiveHost.
Like what happens with the HTTP adapter, the Logic App Adapter is one of the adapters that support two-way communications. Still, unlike other adapters, this adapter has two characteristics that define it:
- The Logic App Receive Adapter that is responsible for delivering messages to BizTalk is, in fact, a WCF Service that runs inside Internet Information Services (IIS).
- And for that reason, it must be configured in IIS – it is not there out-of-the-box.
This means that when we create and configure a receive location that uses the Logic App adapter inside the BizTalk Server Administration Console, this receive location uses an application within IIS.
So, if you leave this Logic App Adapter default configuration, you will end up having the above errors when trying to activate a Receive Location. This happens assigned because the Receive handler is associated with the In-process Host and it should be bound to the Isolated Host.
To fix this bug we need to:
- Remove the adapter from all assigned send ports and receive locations in my applications
- Therefore, it is essential to do this immediately after the installation and configuration of your BizTalk Server environment. Otherwise, it will affect your existing application that uses the Logic App adapter to send messages to Logic Apps.
- Download the BizTalk Server 2020: Scripts to Fix Logic App Adapter installation available on GitHub.
- These scripts were taken from the Microsoft BizTalk Server Adapter for Logic Apps installer used for BizTalk Server 2016.
- Execute the RemoveLogicAppAdapter.vbs script to un-register the Logic App adapter from the BizTalk Server Configuration Console.
- Execute the AddLogicAppAdapter.vbs script to properly register the Logic App adapter from the BizTalk Server Configuration Console.