Stop Azure Function from excessive logging to Application Insights

Maciej
August 7, 2023
222 views
0 votes
2 Answers

I have an Azure Function written in Java that is accompanied with following host.json file:

{
    "version": "2.0",
    "extensionBundle": {
        "id": "Microsoft.Azure.Functions.ExtensionBundle",
        "version": "[3.*, 4.0.0)"
    },
    "extensions": {
        "http": {
            "routePrefix": ""
        },
        "queues": {
            "maxPollingInterval": "00:00:10"
        }
    },
    "logging": {
        "logLevel": {
            "default": "Warning",
            "Host": "Warning",
            "Function": "Warning",
            "Azure.Core": "Error"
        }
    }
}

In my understanding setting the "default": "Warning" log level should result in producing very little logs, except for situations when something unusual happens. Unfortunately this does not seem to be the case. In Application Insights I can see tons of log entries like for example:

"WorkerStatusRequest completed"
"Worker initialized"
"Worker terminate request received. Gracefully shutting down the worker."
"Function "abc" (Id: defghijk) invoked by Java Worker"
"Executed ‘Functions.abc’ (Succeeded, Id=defghijk, Duration=826ms)"
"FunctionLoadRequest received by the Java worker, Java version – C:Program FilesJavamicrosoft-jdk-11.0.16.1 – 11.0.16.1"
…

My question is how to make it silent. Those log statements are not so interesting for me. I have also observed that they are all logged with SeverityLevel=1 which according to the docs is equal to Debug.

Thanks for any help.

Answers

- Hariharan
- August 4, 2023 at 6:48 pm
- 0 votes
0
Try making all possible options to false under Application insights
```
{
"version": "2.0",

"logging":{ "logLevel":"default":"Information",
```
"Function": "Information", "Host.Aggregator":"Information",
"Host": "Error" },
"applicationInsights":
{
"enableDependency Tracking": false,
"excludedTypes": "Request; Dependency:"
```
} } }}
```
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Modify your host.json as shown below to reduce the excessive logging:

{
  "version": "2.0",
  "extensionBundle": {
      "id": "Microsoft.Azure.Functions.ExtensionBundle",
      "version": "[3.*, 4.0.0)"
  },
  "extensions": {
      "http": {
          "routePrefix": ""
      },
      "queues": {
          "maxPollingInterval": "00:00:10"
      }
  },
    "logging": {
      "logLevel": {
        "default": "Warning",
        "Function": "Error",
        "Host.Aggregator": "Error",
        "Host.Results": "Information",
        "Function.Function1": "Information",
        "Function.Function1.User": "Error"
      },
      "applicationInsights": {
        "samplingSettings": {
          "isEnabled": true,
          "maxTelemetryItemsPerSecond": 1,
          "excludedTypes": "Exception"
        }
      }
  }
}

You can aso change all the log levels to Warning or Error.

Response: