App Service trace entry "AI: TelemetryChannel found a telemetry item without an InstrumentationKey. This is a required field and must be set in either your config file or at application startup." although configured correctly and other logging working.

Question

I created my azure app service web app with its corresponding application insights using the portal and its guided wizards. For some reason the app insights trace log has "AI: TelemetryChannel found a telemetry item without an InstrumentationKey. This is a required field and must be set in either your config file or at application startup." showing up nearly every 15 minutes. I even have the logging default set to loglevel.error. Any ideas on what could be causing this? The app insights connection string is defined in the app service environment variables. I have tried adding the InstrumentationKey separately and also in the appsettings.json but nothing works to remove that message.

Answer 1

@Adams, Roger Thanks for asking question! The error message "AI: TelemetryChannel found a telemetry item without an InstrumentationKey. This is a required field and must be set in either your config file or at application startup." indicates that there is an issue with the configuration of your Application Insights instance.

Try the following steps:

string APP_INSIGHTS = builder.Configuration["APPLICATIONINSIGHTS_CONNECTION_STRING"] ?? "";

var options = new ApplicationInsightsServiceOptions { ConnectionString = APP_INSIGHTS };

builder.Services.AddApplicationInsightsTelemetry(options: options);

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