C# - implementing Consuming HTTP APIs with Polly for Resilience in .NET 6
I'm having trouble implementing Polly for resilience when consuming a third-party HTTP API in my .NET 6 application. I want to ensure that my application can handle transient faults gracefully, but I'm running into unexpected behaviors. I set up a simple HttpClient and registered Polly's `HttpPolicyExtensions` to retry on transient failures like `HttpRequestException`. However, I noticed that sometimes requests are still failing without triggering the retry mechanism. Here's a simplified version of my setup: ```csharp var services = new ServiceCollection(); services.AddHttpClient("MyApiClient") .AddPolicyHandler(Policy<HttpResponseMessage>.Handle<HttpRequestException>().RetryAsync(3)); ``` When I execute the following code to call the API: ```csharp var client = serviceProvider.GetRequiredService<IHttpClientFactory>().CreateClient("MyApiClient"); var response = await client.GetAsync("https://api.example.com/data"); ``` Sometimes, I receive a `404 Not Found` response, and the retry logic does not activate, despite the fact that I expected the policy to handle it. I've also tried adding logging to see the exceptions but noticed that only `HttpRequestException` is being caught, while `404` responses don’t throw exceptions. Should I be handling specific status codes differently in my Polly configuration? Or is there an alternative approach I should consider for handling these types of responses? Any insights would be greatly appreciated! Any suggestions would be helpful.