TrackMetric only works sometimes when aggregating

[Cooke]

Repro Steps

1. Follow the (recommended) metric aggregation method according to https://docs.microsoft.com/en-us/azure/application-insights/app-insights-api-custom-events-metrics#aggregating-metrics
2. Generate metrics (with http requests)

Actual Behavior

Some of none of the metrics are collected and shown in the portal.

Expected Behavior

All of the metrics are collected (or skipped due to sampling).

Work around

Make sure to explicitly set MetricTelemetry.Context.Operation.Name before calling TelemetryClient.TrackMetric

Version Info

SDK Version : 2.2.1
.NET Version : 2.1.2
How Application was onboarded with SDK(VisualStudio/StatusMonitor/Azure Extension) : Nuget/custom
OS : Win10 x64
Hosting Info (IIS/Azure WebApps/ etc) : console, kestrel

[cijothomas]

@Cooke Metrics are not subject to sampling, so sampling cannot explain the issue. How do you validate that metrics are missing? Its possible are there is a latency before which they show up in portal.

Can you verify if local VisualStudio is also showing this missing behavior. ?

[Cooke]

@cijothomas I validate they are missing by not showing up in the portal, and by not seeing any related output in the debug log. It is not possible that this is due to latency since I have a workaround that seems to work 100% and for which I can see the related metrics being present in the portal.

What do you mean with local VisualStudio?

[cijothomas]

Can you share a small repro for us to dig deeper into this? It's hard to investigate without repro app. Thanks for your time! @Cooke

[Cooke]

@cijothomas Maybe later, too little time now. I just wanted to let you know and share my work around. Thank you for your time and nice service!

[cijothomas]

@Cooke Okay. The latest SDK has built-in support for aggregated metrics! It'd be awesome if you can give it a try!
New api is documented here : microsoft/ApplicationInsights-dotnet#774
The aspnet.core sdk which refers this new base sdk containing aggregation features, is 2.3.0-beta1, and will be released today on nuget.

[cijothomas]

Closing this for now as no action pending from SDK.
Feel free to reopen if you need help or when you have a repro for further investigation.

Thanks!