Weird Exception in App Service

Question

Hi All,

I am seeing a weird intermittent exception in my logs:

Microsoft.JSInterop.JSException: jQuery is not a function
TypeError: jQuery is not a function
    at Module.NewDocumentElement (https://<id>.azurewebsites.net/_content/DragonSpark.Presentation//Environment/Browser/Document/DocumentElement.js:12:32)
    at https://<id>.azurewebsites.net/_framework/blazor.server.js:1:3501
    at new Promise (<anonymous>)
    at kt.beginInvokeJSFromDotNet (https://<id>.azurewebsites.net/_framework/blazor.server.js:1:3475)
    at https://<id>.azurewebsites.net/_framework/blazor.server.js:1:72001
    at Array.forEach (<anonymous>)
    at kt._invokeClientMethod (https://<id>.azurewebsites.net/_framework/blazor.server.js:1:71987)
    at kt._processIncomingData (https://<id>.azurewebsites.net/_framework/blazor.server.js:1:70029)
    at vt.connection.onreceive (https://<id>.azurewebsites.net/_framework/blazor.server.js:1:64432)

What's weird about this is the root URI where this exception is occurring, and I want to verify this. I have my .azurewebsites.net seen above, but it also is forwarded to a custom domain. According to the exception message, it appears this is occurring in the azurewebsites.net location, but I cannot verify this. I am looking in the event log and it does not say which URL this occurs in.

When an exception occurs, is there some way of seeing what the requested URI/host was when this occurred?

To further round this out, what's weird about this is that if this indeed occurring in my .azurewebsites.net address, that is entirely unexpected and a little worrisome, as I have never broadcasted this URI and I am wondering how someone might find this. The only address I have advertised is the custom domain, and I am worried if my .azurewebsites.net address is somehow being leaked somewhere with my configuration.

Thank you for any assistance you can provide,
Michael

Answer 1

Got another request to my azurewebsites.net address, this time with a bitdiscovery UserAgent

https://bitdiscovery.com/

Is this a known partnership with Azure or something, perhaps?

Answer 2

https://learn.microsoft.com/en-us/answers/questions/995573/bitdiscovery.html