BizTalk What does mean segment and progress from "Exception thrown from: segment X progress Y" communicate

Question

What does 'segment' and 'progress' mean in that kind of exception

2) xlang/s engine event log entry: Uncaught exception (see the 'inner exception' below) has suspended an instance of service 'MainEventProcess.MainEvent(5b530a24-7336-4695-78ee-1d4ffdd9f210)'. The service instance will remain suspended until administratively resumed or terminated. If resumed the instance will continue from its last persisted state and may re-throw the same unexpected exception. InstanceId: cf584087-a9d3-4be7-8da7-eae49fd4a108 Shape name: SendDeviationOut ShapeId: dc5c3484-7955-4d75-b1f9-7e0ca8ecbc1e Exception thrown from: segment 4, progress 8 Inner exception: Exception occurred when persisting state to the database.

Full details hereon MSDN: Exception during execution of Orchestration

Can it be helpful in searching errors in code?

Answer 1

First, it's nothing you need to worry about and is not related to your app/code/implementation.

The two items you need to act on are SendDeviationOut and Exception occurred when persisting state to the database. You are most likely publishing a message and there are no Subscribers. This is the "no Subscribers found" error from the Orchestration engine.

Now, to answer your specific question, those are markers to blocks of C# code that XLang compiler generated from your Orchestration. Basically, every statement is organized into a group, segment, and each is executed and tracked individually, progress. If you open the File0.cs, you will see this in action.