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Better error log for: "No .NET call dispatcher has been set."

See original GitHub issue

Is there an existing issue for this?

I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

I have added sentry to my website and i notice there are some errors with “No .NET call dispatcher has been set.”. But i do not have the same issue locally and based on the exception (stack trace) i wasn’t able to resolve this issue. The only hint is that it is happening only on iOS devices so far.

Stack trace

Error: No .NET call dispatcher has been set.
  at w(/_framework/blazor.webassembly.js:1:2110)
  at b(/_framework/blazor.webassembly.js:1:1995)
  at ? (/_framework/blazor.webassembly.js:1:60337)
  at asyncFunctionResume([native code])
  at ? (/_framework/blazor.webassembly.js:1:28875)
  at asyncFunctionResume([native code])
  at ? (/_framework/blazor.webassembly.js:1:27678)
  at asyncFunctionResume([native code])
  at ? (/_framework/blazor.webassembly.js:1:28990)
  at asyncFunctionResume([native code])

Describe the solution you’d like

It would be nice if there was some hint in error message which make debugging easier.

Additional context

No response

Issue Analytics

State:
Created 4 months ago
Comments:14 (9 by maintainers)

Top GitHub Comments

1reaction

javiercncommented, May 10, 2023

@jirisykora83 sorry, my English broke 😄.

Avoid running things that interact with JS or Blazor state from background threads, and so on.

Blazor uses a synchronization context and things like ConfigureAwait break it.

0reactions

jirisykora83commented, May 10, 2023

I already deploy ‘fix’ where i try to remove ConfigureAwait (i hope i do not miss anything). But I still see the error in sentry. Is there anything else what could cause it? Or is there something that I can do to get more information about the error (without access to real devices where error happen)?

From what i know it is only happened on iOS devices