Code=-1001 “The request timed out.”

Question

I am working on a Swift project which requires a lot of consumption of APIs. Everything is working fine but sometimes (1 in 20), I get Code=-1001 "The request timed out." error while calling the API.

I am using Alamofire. I am attaching the code to call API.

let request = NSMutableURLRequest(URL: url)
request.HTTPMethod = "POST"    
request.HTTPBody = myUrlContents.dataUsingEncoding(NSUTF8StringEncoding)

request.timeoutInterval = 15

request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.setValue("application/json", forHTTPHeaderField: "Accept")
request.setValue("\(myUrlContents.dataUsingEncoding(NSUTF8StringEncoding)!.length)", forHTTPHeaderField: "Content-Length")
request.setValue("en-US", forHTTPHeaderField: "Content-Language")

Alamofire.request(request)
      .validate()
      .responseJSON { [weak self] response in

      if response.result.isSuccess {
            if let result = response.result.value {
                  print("Result: \(result)")

                  completion(result: result as! NSDictionary)
            }
      }
      else {
            print(response.debugDescription)
       }
}

And the log is

[Request]: <NSMutableURLRequest: 0x18855620> { URL: http://....... (url)}
[Response]: nil
[Data]: 0 bytes
[Result]: FAILURE: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={NSErrorFailingURLStringKey=http://.....(url) NSErrorFailingURLKey=http://.....(url), NSLocalizedDescription=The request timed out., _kCFStreamErrorDomainKey=4, NSUnderlyingError=0x18a08900 {Error Domain=kCFErrorDomainCFNetwork Code=-1001 "(null)" UserInfo={_kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-2102}}}
[Timeline]: Timeline: { "Request Start Time": 493582123.103, "Initial Response Time": 493582138.254, "Request Completed Time": 493582138.254, "Serialization Completed Time": 493582138.256, "Latency": 15.151 secs, "Request Duration": 15.151 secs, "Serialization Duration": 0.002 secs, "Total Duration": 15.153 secs }

I know I can increase the timeout period to avoid the error. But I want to know the actual reason why it is throwing the error. None of my API takes more than 2 seconds to return data. Then why it is showing latency of 15.151 seconds.

I am using LAMP stack on backend. Any help would be appreciated.

Answer 1

I had got the error with Code=-1001 “The request timed out.”. I tried a few things. Nothing worked. Finally I found out that the problem was in my parameters that I'm sending in the request body to the server which were of wrong format(value was fine but type was wrong). Thats why the request was timing out coz the server wasn't able to process it. You can check that up if nothing else works for u.

Answer 2

I just encountered the same problem. I am using a GET request, and it turns out that using [:] is wrong. You have to use nil in GET request and [:] in POST request