Potential net6 App Insights Memory Leak

[Bharts8]

• List of NuGet packages and version that you are using: <PackageReference Include="Microsoft.ApplicationInsights" Version="2.19.0" /> <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.19.0" />
• Runtime version (e.g. net461, net48, netcoreapp2.1, netcoreapp3.1, etc. You can find this information from the *.csproj file): net6
• Hosting environment (e.g. Azure Web App, App Service on Linux, Windows, Ubuntu, etc.): Azure Web App

Describe the bug

Created a net6 project hosted in Azure Web App to host a reasonably simple REST API. After running for about a day noticed extremely high memory usage akin to a memory leak application insights described in #1678 Was able to capture memory dump and find 26.5k long running net tasks seemingly coming from Microsoft.AI.PerfCounterCollector

Mitigated by using versions <PackageReference Include="Microsoft.ApplicationInsights" Version="2.11.0" /> <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.8.2" />

[TimothyMothra]

Hi @BPHartel Can you share a minimal repro? This would allow us to collect a dump to investigate.

[ercquest]

I am also seeing this issue and it may prevent us from using App Insights

[MisinformedDNA]

Was able to capture memory dump and find 26.5k long running net tasks seemingly coming from Microsoft.AI.PerfCounterCollector

26564 is the thread ID, not the number of threads.

[rgrace-puck]

I'm also seeing something similar while using Azure Functions, our App Service Plan memory usage slowly creeps up over time.

After talking with Azure support, they provided a system process graph showing "MeteringDotNetCore.dll" process with nearly 40% usage at the time of capture. The behavior suddenly started showing without any changes and suddenly stopped as well.

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