HttpContext == null

[Jamestravisa]

I have a Core 8 application using Blazor 8 and CLSA 8.2.8. The application have a few pages all of them are loading except one page which keeps posting "System.InvalidOperationException: HttpContext == null" on the first CSLA fetch or create. None of the other pages are exhibiting this issue, and it is only happening on our test server not locally. I cannot seem to figure this one out and no amount of searching has helped me. Any help would be appreciated.

[rockfordlhotka]

This occurs when the state management subsystem is retrieving the unique session id for the current user. To do this, it makes use of the HttpContext object to retrieve the cookie containing the unique id value.

Can you narrow this down to a specific navigation path used to arrive at the failing page? Or does this page fail with different navigation paths taken to arrive there?

[Jamestravisa]

Yes that is correct. See Below image.

[rockfordlhotka]

I don't see how ApplicationContext is set (or is being guaranteed to be set) in that factory implementation?

[Jamestravisa]

You lost me the top is the factory method with the ApplicationContext being DI and the bottom just a generic base class, or am I missing something key in my implementation.

[rockfordlhotka]

I misread the code.

So now my question is why you are using a sync Fetch call? Blazor generally won't work with sync calls to things like the database or an app server. I would expect to have issues when calling a sync data portal method instead of awaiting a FetchAsync call.

[Jamestravisa]

I updated to async from page to db and there is a change to the error message stack trace but the same Httpcontext == null.

[StefanOssendorf]

Could you log the current render mode on the page please? For me with this stretch trace it seems the error occurs before transitioning to the server.

[Jamestravisa]

Had the following set to false in the CSLA setup in my program. Set it to true to use the CSLA state manager and seems to have fixed the issue.
AddServerSideBlazor(o => o.UseInMemoryApplicationContextManager = true)

[rockfordlhotka]

If you are using 100% server-interactive pages (no server-static pages) then that is the correct setting.