Issue with .NET Framework 4.7 application using the Opentelemetry .NET Instrumentation.

[rahjesh-vunet]

Hi, I am trying to instrument a .NET Framework 4.7 application using the Opentelemetry .NET Instrumentation. The Opentelemetry .NET Instrumentation 1.4.0 was used. The steps followed are

1. Import-Module ".\OpenTelemetry.DotNet.Auto.psm1"
2. Install-OpenTelemetryCore
3. Register-OpenTelemetryForIIS
4. Add the following application settings.
   OTEL_EXPORTER_OTLP_ENDPOINT
   OTEL_EXPORTER_OTLP_PROTOCOL with value “http/protobuf”
   OTEL_RESOURCE_ATTRIBUTES with value “application=<APPLICATION_NAME>”
   OTEL_SERVICE_NAME with value “<SERVICE_NAME>”

The Opentelemetry instrumentation started and send some data to the OTel Collector. Here is the Opentelemetry logs.

[2024-08-09T05:35:57.4677617Z] [Information] OpenTelemetry tracer initialized. 
[2024-08-09T05:35:57.4990463Z] [Information] EventSource=OpenTelemetry-AutoInstrumentation, Message=OpenTelemetry tracer initialized. 
[2024-08-09T05:35:57.6396332Z] [Information] OpenTelemetry meter initialized. 
[2024-08-09T05:35:57.6396332Z] [Information] EventSource=OpenTelemetry-AutoInstrumentation, Message=OpenTelemetry meter initialized. 
[2024-08-09T05:35:57.6552586Z] [Information] The profiler has been initialized with 16 definitions for FFAFA5168C4F4718B40CA8788875C2DA. 
[2024-08-09T05:35:57.6552586Z] [Information] EventSource=OpenTelemetry-AutoInstrumentation, Message=The profiler has been initialized with 16 definitions for FFAFA5168C4F4718B40CA8788875C2DA. 
[2024-08-09T05:35:57.6708955Z] [Information] The profiler has been initialized with 0 derived definitions. 
[2024-08-09T05:35:57.6708955Z] [Information] EventSource=OpenTelemetry-AutoInstrumentation, Message=The profiler has been initialized with 0 derived definitions. 
[2024-08-09T05:36:02.5302894Z] [Warning] EventSource=OpenTelemetry-Api, Message=Failed to inject activity context in format: 'TraceContextPropagator', context: 'Invalid context'. 

But the application is not working as expected. There was an error we got in the application.

System.NotSupportedException: Collection is read-only.
   at System.Collections.Specialized.NameValueCollection.Set(String name, String value)
   at System.Web.HttpHeaderCollection.SetHeader(String name, String value, Boolean replace)

In the otel-dotnet-auto-native logs i could see a lot of binding redirects.

] [736|9360] [info] JITCompilationStarted: Startup hook registered in function_id=140720011979072 token=100688377 name=System.Web.Compilation.BuildManager.InvokePreStartInitMethods(), assembly_name=System.Web app_domain_id=140721616895824 domain_neutral=1
[2024-08-09T07:10:58.713493100Z] [736|9360] [info] ModuleLoadFinished: OpenTelemetry.AutoInstrumentation.Loader loaded into AppDomain 2360651058928 [/LM/W3SVC/4/ROOT-1-133676610569584671]
[2024-08-09T07:10:59.099147500Z] [736|9360] [info] RedirectAssemblyReferences: redirecting [System.Runtime.CompilerServices.Unsafe] from_version=4.0.4.1 to_version=6.0.0.0 previous_redirects=0
[2024-08-09T07:10:59.111604700Z] [736|9360] [info] RedirectAssemblyReferences: redirecting [System.Memory] from_version=4.0.1.1 to_version=4.0.1.2 previous_redirects=0
[2024-08-09T07:10:59.111688100Z] [736|9360] [info] RedirectAssemblyReferences: redirecting [System.Runtime.CompilerServices.Unsafe] from_version=4.0.4.1 to_version=6.0.0.0 previous_redirects=1
[2

Is this redirects causing any issue to the application? Is is a version conflict issue?

[nrcventura]

This is being tracked in the related issue #3589.