异常后 Application Insights RequestTelemetry 未显示在请求中

Question

我花了一段时间尝试 RequestTelemetry 工作。当我第一次使用它时它确实如此，但奇怪的是每当抛出异常时它就停止工作。我已阅读使用Application Insights 进行自定义事件和指标以及自定义操作跟踪的文档，并尝试添加所有最佳实践以查看是否可以再次显示结果。我正在使用 .NET Core 3.1 和 Microsoft.ApplicationInsights.AspNetCore 2.14.0。

Web 应用程序的设置在 Startup.cs 中如下所示

services.AddApplicationInsightsTelemetry(new ApplicationInsightsServiceOptions { 
    EnableAdaptiveSampling = false
}); 

我在控制器后操作中进行了遥测。我意识到 Application Insights 已经在跟踪它的后操作，但我想看看是否可以跟踪内部方法。这是我的控制器中的代码：

public MyController(IMyService myService, TelemetryClient telemetryClient, ILogger<MyController> logger) {
    _myService = myService;
    _telemetryClient = telemetryClient;
    _logger = logger;
}

[HttpPost]
[ProducesResponseType(StatusCodes.Status204NoContent)]
[ProducesResponseType(StatusCodes.Status400BadRequest)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
public async Task<IActionResult> PostAsync([FromBody] MyModel model) {
    using var scope = _logger.BeginScope(new Dictionary<string, object> {
        { $"{nameof(PostAsync)}.Scope", Guid.NewGuid() },
        { nameof(model.Name), model.Name }
    });

    model.AuthenticatedUserId = User.GetUserIdFromClaims();

    var requestTelemetry = new RequestTelemetry { Name = nameof( _myService.MyFunctionAsync) };
    var operation = _telemetryClient.StartOperation(requestTelemetry);
    operation.Telemetry.Properties.Add("User", model.AuthenticatedUserId);

    try {
        await _myService.MyFunctionAsync(model).ConfigureAwait(false); // <-- throws exception
        operation.Telemetry.Success = true;
        return NoContent();
    } catch (Exception e) {
        operation.Telemetry.Success = false;
        throw;
    } finally {
        _telemetryClient.StopOperation(operation);
    }
}

我可以在 Visual Studio 控制台输出中看到代码执行，因为我收到以下日志，但它从未显示在 Application Insights 中Requests。

Application Insights Telemetry: {
  "name": "AppRequests",
  "time": "2020-06-21T14:29:08.7469588Z",
  "iKey": "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX",
  "tags": {
    "ai.application.ver": "1.0.0.0",
    "ai.cloud.roleInstance": "DESKTOP-K74PNCU",
    "ai.operation.id": "0443259d660125498cf28f8f7a275dab",
    "ai.operation.parentId": "1dea6f9b27220c4c",
    "ai.operation.name": "POST EventEmitter/Post",
    "ai.location.ip": "::1",
    "ai.internal.sdkVersion": "dotnetc:2.14.0-17971",
    "ai.internal.nodeName": "DESKTOP-K74PNCU"
  },
  "data": {
    "baseType": "RequestData",
    "baseData": {
      "ver": 2,
      "id": "2b7900eedfb7c34d",
      "name": "MyFunctionAsync",
      "duration": "00:00:00.3766937",
      "success": false,
      "properties": {
        "DeveloperMode": "true",
        "User": "pobl-dev",
        "_MS.ProcessedByMetricExtractors": "(Name:'Requests', Ver:'1.1')",
        "AspNetCoreEnvironment": "Development"
      }
    }
  }
}

Answer 1

有一个简单的解决方案，但由于缺乏文档或错误，我不确定为什么有必要。我发现一旦responseCode提供，一切正常。成功调用时会显示默认值responseCode。200一旦我设置了失败的值，一切就正常了。

public MyController(IMyService myService, TelemetryClient telemetryClient, ILogger<MyController> logger) {
    _myService = myService;
    _telemetryClient = telemetryClient;
    _logger = logger;
}

[HttpPost]
[ProducesResponseType(StatusCodes.Status204NoContent)]
[ProducesResponseType(StatusCodes.Status400BadRequest)]
[ProducesResponseType(StatusCodes.Status401Unauthorized)]
public async Task<IActionResult> PostAsync([FromBody] MyModel model) {
    using var scope = _logger.BeginScope(new Dictionary<string, object> {
        { $"{nameof(PostAsync)}.Scope", Guid.NewGuid() },
        { nameof(model.Name), model.Name }
    });

    model.AuthenticatedUserId = User.GetUserIdFromClaims();

    var requestTelemetry = new RequestTelemetry { Name = nameof( _myService.MyFunctionAsync) };
    var operation = _telemetryClient.StartOperation(requestTelemetry);
    operation.Telemetry.Properties.Add("User", model.AuthenticatedUserId);

    try {
        await _myService.MyFunctionAsync(model).ConfigureAwait(false); // <-- throws exception
        operation.Telemetry.Success = true;
        operation.Telemetry.ResponseCode = "Roses";
        return NoContent();
    } catch (Exception e) {
        operation.Telemetry.Success = false;
        operation.Telemetry.ResponseCode = "Funky"; // <-- seems to be required on a failure
        throw;
    } finally {
        _telemetryClient.StopOperation(operation);
    }
}