otel-dotnet-auto-instrumentation can not be triggered by all applications in an application pool in IIS

[muhaook]

we have 2 .net framework applications deployed into 1 application pool in IIS. The issue is that the otel-dotnet-auto-instrumentation (1.11.0) can not be triggered for the second application. Looks like it is related to CLR profiling API. Can someone help have a look please?

Steps to reproduce the issue:
1/ download the 2 attached apps, unzip them and put under C:\inetpub\wwwroot
2/ in inetmgr, select the 2 folders and then "Convert to Application" (pick up the same application pool, I picked up DefaultAppPool)
3/ install otel-dotnet-auto-instrumentation (1.11.0) and then register OpenTelemetry netfx DLLs to GAC
4/ on browser, access the first application: http://localhost/WebApiFirst/api/values
5/ on browser, access the second application: http://localhost/WaAbridge2Netfx462/api/values
6/ check otel logs and you'll find only the first application triggered the otel-dotnet-auto-instrumentation

WebApiFirst.zip
WaAbridge2Netfx462.zip

[RassK]

Are you sure that only first is triggered, instead using the first app's name?
#2189

[RassK]

@muhaook pinging for updates, if we should keep this issue open?

[muhaook]

Thanks @RassK, I am sure the only first application/autoinstrumentation is triggered and the issue is not related to service name. I am on vacation at the moment, so likely respond slowly.