Description
openedon Mar 26, 2021
- ApplicationInsight version: 2.17 (Latest)
- .NET 5
Describe the bug
Grpc.Net.Client raises events that HttpCoreDiagnosticSourceListener listens to. The problem is that TypedFetchProperty assumes that the type passed here will always be the same. Grpc.Net.Client has a copy of the types passed to the listener.
ApplicationInsights-dotnet/WEB/Src/Common/PropertyFetcher.cs
Lines 46 to 49 in 81288f2
If System.Net.Http raises the events with one type, and Grpc.Net.Client raises the events with a different type, then TypedFetchProperty throws an error.
AI (Internal): [Microsoft-ApplicationInsights-Extensibility-DependencyCollector] HttpCoreDiagnosticSourceListener OnNext failed to call event handler. Error details 'System.InvalidCastException: [A]ActivityStartData cannot be cast to [B]ActivityStartData. Type A originates from 'Grpc.Net.ClientFactory, Version=2.0.0.0, Culture=neutral, PublicKeyToken=d754f35622e28bad' in the context 'Default' at location '/app/Grpc.Net.ClientFactory.dll'.
Type B originates from 'System.Net.Http, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' in the context 'Default' at location '/usr/share/dotnet/shared/Microsoft.NETCore.App/5.0.4/System.Net.Http.dll'.
at Microsoft.ApplicationInsights.Common.PropertyFetcher.PropertyFetch.TypedFetchProperty`2.Fetch(Object obj)
at Microsoft.ApplicationInsights.DependencyCollector.Implementation.HttpCoreDiagnosticSourceListener.OnNext(KeyValuePair`2 evnt)'
To Reproduce
With AI configured, make a web request with HttpClient, and make a gRPC request with Grpc.Net.Client.
Whichever library makes the second request will fail because TypedFetchProperty has been created against the other libraries copy of the event objects.