System.net.webexception The Remote Server Returned An Error -502- Bad Gateway

In technical terms, your .NET application successfully contacted the gateway, but the gateway failed to get a valid HTTP response from the application server behind it.

A occurs when the "front-end" server (the gateway) tries to relay your request to the "back-end" server (the origin), but the back-end server sends back an invalid or garbled response. Common Causes in .NET Applications 1. The Backend Service is Down or Crashing In technical terms, your

If the backend server is overwhelmed, it may take too long to process a request. If the gateway server has a shorter timeout than the backend takes to respond, the gateway will "give up" and return a 502 to your .NET client. 3. Misconfigured Proxy or Load Balancer The Backend Service is Down or Crashing If

When the remote server returns a valid HTTP response but with an error status code (>= 400), the WebException is raised with the Status property set to WebExceptionStatus.ProtocolError . You can then inspect the response to retrieve the actual HTTP status code—in this case, 502. Misconfigured Proxy or Load Balancer When the remote

if (i == maxRetries - 1) throw; await Task.Delay(TimeSpan.FromSeconds(Math.Pow(2, i)));

: Set ServicePointManager.SetTcpKeepAlive(true, 30000, 30000) and reduce HttpClient idle connection lifetime: