CODEWITHSUNDEEP
c#.net-coreazure-functionsappinsights
winterishere
winterishere

Reputation: 389

Microsoft-ApplicationInsights-AspNetCore ERROR: Exception in Command Processing for EventSource Microsoft-ApplicationInsights-AspNetCore

I am using .net core 3.1 function app and implemented app insight. Error is logging good and I am able to see it in azure portal app insight but receiving below error when trying to log information.

AI (Internal): [Microsoft-ApplicationInsights-AspNetCore] ERROR: Exception in Command Processing for EventSource Microsoft-ApplicationInsights-AspNetCore : An instance of EventSource with Guid dbf4c9d9-6cb3-54e3-0a54-9d138a74b116 already exists.

How to write information logs to azure app insight. I have already tried many stackoverflow and MS suggestions. Even tried updating app insight version fron 2.17.0 to 2.19.0. Nothing worked.

local.settings.json

"values" :{
         "INSTRUMENTATION_KEY": "*******************",
   },
  "logging": {
"logLevel": {
  "default": "Information",
  "Function": "Information",
  "Host.Aggregator": "Trace",
  "Host.Results": "Error"
}
}

host.json

  {
"version": "2.0",
"logging": {
"applicationInsights": {
  "samplingExcludedTypes": "Request",
  "samplingSettings": {
    "isEnabled": false
  }
}
}
}

startup.cs

        public override void Configure(IFunctionsHostBuilder builder)
      {
        builder.Services.AddLogging();
        // Add and Configure Application Insight
        builder.Services.AddApplicationInsightsTelemetry(Environment.GetEnvironmentVariable("INSTRUMENTATION_KEY"));
       }

Function:

public class TestFunction
{
  private readonly ILogger<TestFunction> _log;

   public TestFunction(ILogger<TestFunction> log)
   {
       _log = log;
   }

    [FunctionName("TestFunction")]
    public async Task Run([TimerTrigger("%RUN_SCHEDULE%")] TimerInfo myTimer)
    {

       _log.LogInformation("I am not working :("); //Log is not written to azure app insight
       _log.LogError("Yipee I am working"); //Able to see error logs in app insgight
    }
  }

Upvotes: 0

Views: 1309

Answers (1)

Peter Bons
Peter Bons

Reputation: 29860

The error

AI (Internal): [Microsoft-ApplicationInsights-AspNetCore] ERROR: Exception in Command Processing for EventSource Microsoft-ApplicationInsights-AspNetCore : An instance of EventSource with Guid dbf4c9d9-6cb3-54e3-0a54-9d138a74b116 already exists.

is unrelated to the fact that you cannot see the telemetry with severity level Information.

Per default AI only logs telemetry with severity Warning or higher. To change that you need to specify the log level of the AI category like this:

{
  "Logging": {
    "LogLevel": {
      "default": "Information",
      "Function": "Information",
      "Host.Aggregator": "Trace",
      "Host.Results": "Error"
    },
    "ApplicationInsights": {
      "LogLevel": {
        "Default": "Information",
      }
    }
  },
  "ApplicationInsights": {
    "InstrumentationKey": "************"
  }
}

Upvotes: 0

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