Could not load type 'System.Diagnostics.ProductionBreakpointsStub Error in app deployed in Azure

Question

I have an application deployed in Azure, since this morning I starting receiving this error:

Unhandled Exception: System.TypeInitializationException: The type initializer for 'System.Diagnostics.DiagnosticListener' threw an exception. ---> System.TypeLoadException: Could not load type 'System.Diagnostics.ProductionBreakpointsStub' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. at __EnsureBootstrap__System.Diagnostics.DiagnosticSource.dll() at System.Diagnostics.DiagnosticListener..cctor() --- End of inner exception stack trace --- at System.Diagnostics.DiagnosticListener..ctor(String name) at Microsoft.AspNetCore.Hosting.WebHostBuilder.BuildCommonServices(AggregateException& hostingStartupErrors) at Microsoft.AspNetCore.Hosting.WebHostBuilder.Build() at MotionCatalyst.Online.Program.Main(String[] args)

My application is a asp.net core app but target the full framework.

This is the project file:

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>net461</TargetFramework>
    <RuntimeIdentifier>win7-x86</RuntimeIdentifier>
    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
  </PropertyGroup>

Locally is working. any help?

What Azure service are you used to host the website? Have you tried to redeploy the website? — Tom Sun
– Tom Sun, Commented Nov 24, 2017 at 2:17

Juha · Accepted Answer · 2017-12-14 21:30:41Z

3

I think there might be a bug in current version of Application Insights extension (2.4.7). Does the error go away if you remove the extension from App Service?

The other workaround would be to delete following files manually, but I suppose it also disables the snapshot debugging functionality:

d:\home\SiteExtensions\Microsoft.ApplicationInsights.AzureWebSites\Instrumentation32\ProductionBreakpoints_x86.config

d:\home\SiteExtensions\Microsoft.ApplicationInsights.AzureWebSites\Instrumentation64\ProductionBreakpoints_x64.config

answered Dec 14, 2017 at 21:30

Juha

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1 Comment

mehmetilker Over a year ago

Removing App Insight extension from app service solve the problem. It was .net 4.6.1 then upgraded to 4.7.1 but I got same result.

Niki Marinov · Accepted Answer · 2017-12-13 17:28:54Z

2

I had the same problem. Solution was to change .NET framework from 461 to 462.

answered Dec 13, 2017 at 17:28

Niki Marinov

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Sam · Accepted Answer · 2018-03-11 12:22:58Z

2

Removing App Insight extension config files solved the problem.

answered Mar 11, 2018 at 12:22

Sam

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UBK · Accepted Answer · 2020-08-16 17:59:47Z

0

Restarting the Azure App service solved the issue for me. My application was build with .NET Framework 4.6.1 and Azure App service was running on ASP.NETv4.7 32 bit.

answered Aug 16, 2020 at 17:59

UBK

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