How to tell Application Insights to ignore 404 responses

Question

ApplicationInsights has recently started mailing me a Weekly Telemetry Report. My problem is that it tells me that I have a bunch of Failed Requests, Failed Dependencies, and Exceptions, but when I click through to analyze the failures I see that they are all associated with attempts by bots or Bad Guys to access nonexistent pages in my website.

Is there an easy way to tell ApplicationInsights that I am not interested in metrics associated with attempts to access nonexistent pages? Yes, I appreciate the Weekly Telemetry Report, but I don't want to have to take the time to investigate a category of frequently reported problems that I consider "false positives".

Answer 1

You can modify the request telemetry and mark it as a Success (not Fail). This way, the request will be properly logged by the AI but as a successful one. You need to implement a Telemetry Initializer.

Example:

public class CustomTelemetryInitializer : ITelemetryInitializer {     public void Initialize(ITelemetry telemetry)     {         switch (telemetry)         {             case RequestTelemetry request when request.ResponseCode == "404":                 request.Success = true;                 break;         }     } }