Got error "System.Net.WebException: The operation has timed out" from time to time

Question

User-105856378 posted

My application use 5 threads to send HTTP requests continuously to a REST service. I keep on getting the following error from time to time

System.Net.WebException: The operation has timed out
   at System.Net.HttpWebRequest.GetResponse()
   at LexisNexis.LTN.Analytics.Util.HttpHelper.Verb(Uri uri, Verbs verb, JObject jObject, PostParameter[] parameters, HttpStatusCode expectedHttpCode, Boolean readResponseBody) in c:\NingjunWS\Proof of Concept\CaatLib\LexisNexis.LTN.Analytics\Util\HttpHelper.cs:line 104

I Google around and see many people talk about that but nothing work for me

Here is my code snippet

            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);

           httpWebRequest.Method = verb.ToString();

           httpWebRequest.Accept = "application/json"; //accept json

          

           using (Stream parametersStream = httpWebRequest.GetRequestStream())

                   parametersStream.Write(parameterData, 0, parameterData.Length);

           

   try

           {

               using (HttpWebResponse resp = (HttpWebResponse) httpWebRequest.GetResponse())

               { // The above line throw the exception System.Net.WebException: The operation has timed out sporadically

                    

                   // read response body

                   using (Stream dataStream = resp.GetResponseStream())

                   using (StreamReader streamReader = new StreamReader(dataStream, Encoding.UTF8))

                   {

                       string ret = streamReader.ReadToEnd();

                       return ret;

                   }

               }

           }

           catch (WebException ex)

           {

               using (HttpWebResponse response = (HttpWebResponse) ex.Response)

               {

                   if (response == null) throw;

                   string errorMsg = GetErrorMessage(response);

                   throw new RestException(response.StatusCode, errorMsg, ex);

               }

           }

       }

Answer 1

User364480375 posted

First make sure you close your HTTP connections.

you can try increasing maxRequestLength int the Httpruntime section in web.config.

Answer 2

User-105856378 posted

Form the code I sent you can see that I do close all connections with the "using" statement.

Do you suggest to increase maxRequestLength in the REST service side or client side? I do not have any control on the service side because it is a third party REST service written in JAVA.

Answer 3

User-105856378 posted

I set the following on the client side and still got time out exception

 

  <system.web>

    <httpRuntime maxRequestLength="4096000" />

  </system.web>

 

 

Answer 4

User-105856378 posted

 <system.web>
    <httpRuntime maxRequestLength="4096000" />
  </system.web>

Answer 5

User-417640953 posted

Hi ningjunwang2,

Thank you post the issue to asp.net forum.

For your issue, I suggest you note below points.

# Increase the timeout property of HttpWebRequest like below.

 var request = (HttpWebRequest)WebRequest.Create(Url);
 request.Timeout = 1000000;

# Try to increate the wcf service receiveTimeout and sendTimeout like below.

 <binding name="longTimeoutBinding" receiveTimeout="00:10:00" sendTimeout="00:10:00">
        <security mode="None"/>
      </binding>

Hope that helps, thanks.

Best Regards!

Answer 6

User-105856378 posted

Your solution work

 var request = (HttpWebRequest)WebRequest.Create(Url);
request.Timeout = 1000000;

 

Thanks a lot.