samplingExcludedTypes is incorrect, it goes inside samplingSettings and is just called excludedTypes

[andrewleader]

The docs claim samplingExcludedTypes (and samplingIncludedTypes) are directly children of applicationInsights and NOT inside samplingSettings...

"applicationInsights": {
            "samplingSettings": {
              "isEnabled": true,
              "maxTelemetryItemsPerSecond" : 20,
              "evaluationInterval": "01:00:00",
              "initialSamplingPercentage": 1.0, 
              "samplingPercentageIncreaseTimeout" : "00:00:01",
              "samplingPercentageDecreaseTimeout" : "00:00:01",
              "minSamplingPercentage": 0.1,
              "maxSamplingPercentage": 0.1,
              "movingAverageRatio": 1.0
            },
            "samplingExcludedTypes" : "Dependency;Event",
            "samplingIncludedTypes" : "PageView;Trace",
            "enableLiveMetrics": true,

However, that's incorrect. It actually goes inside samplingSettings, and is called excludedTypes. I spent 40 minutes trying to figure out why the excluded types weren't working, all because the docs are wrong!

"applicationInsights": {
            "samplingSettings": {
              "isEnabled": true,
              "excludedTypes" : "Dependency;Event",
              "includedTypes" : "PageView;Trace",
            }
}

Their source code confirms this and was the reason I tried moving the property inside samplingSettings: https://github.com/Azure/azure-functions-host/blob/8e37c6f055d538460df6c18fc74c310edd58f225/src/WebJobs.Script/Config/ApplicationInsightsLoggerOptionsSetup.cs#L58

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Document Details

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• ID: 27150c55-615f-fb44-d5e4-7b5815631c7d
• Version Independent ID: 271006dc-afce-99f3-0790-41fa2e35b22b
• Content: host.json reference for Azure Functions 2.x
• Content Source: articles/azure-functions/functions-host-json.md
• Service: azure-functions
• GitHub Login: @ggailey777
• Microsoft Alias: glenga

[DixitArora-MSFT]

Hi @andrewleader Thanks for your feedback. We will review and update as appropriate.

[DixitArora-MSFT]

@andrewleader PR has been created for this which will address this. Thanks so much for providing the feedback that help us in improving the documentation. For now I will proceed with closure of this and If there are further questions regarding this matter, please tag me in your reply. We will gladly continue the discussion and we will reopen the issue.

[andrewleader]

@DixitArora-MSFT the property tables also need to be updated (that PR only updated the sample JSON, the rest of the doc needs to be updated)