C# 10 HttpClient Timeout Behavior in Asynchronous Calls Causing Unexpected Results
I'm trying to figure out I've been researching this but I'm sure I'm missing something obvious here, but I'm encountering an issue with the `HttpClient` class in C# 10 that seems to stem from the timeout configuration when making asynchronous calls. I have a method that fetches data from an external API, and I set the timeout to 2 seconds. However, it seems that under certain network conditions, the call is not timing out as expected, and I receive a response after up to 5 seconds instead. Here's the relevant code snippet: ```csharp public async Task<string> FetchDataAsync(string url) { using (var client = new HttpClient()) { client.Timeout = TimeSpan.FromSeconds(2); try { var response = await client.GetAsync(url); response.EnsureSuccessStatusCode(); return await response.Content.ReadAsStringAsync(); } catch (TaskCanceledException ex) // TimeoutException not caught { // This block is entered only when the timeout is reached. Console.WriteLine("Request timed out."); return null; } catch (Exception ex) { Console.WriteLine(ex.Message); return null; } } } ``` I've tried using both `GetAsync` and `SendAsync` but the behavior remains the same. The `TaskCanceledException` is caught correctly when it times out, but it appears that the request sometimes completes after the timeout period without throwing this exception. I also verified that the server I'm querying does not have any long-running processes that would explain this behavior. I suspect there might be some underlying buffering or the way the underlying sockets handle the connections that could be causing this. Is there a known issue with `HttpClient` timeout handling, or am I missing any best practices for configuring the `HttpClient` in a way that guarantees a strict timeout behavior? Any insights would be highly appreciated! My development environment is Ubuntu. What am I doing wrong? My development environment is Ubuntu 22.04. Any advice would be much appreciated. I'd be grateful for any help. I'm working in a Ubuntu 20.04 environment. Thanks for taking the time to read this!