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POHttpWebRequest times out on second call
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copied!<p>Why does the following code Timeout the second (and subsequent) time it is run?</p> <p>The code hangs at:</p> <pre><code>using (Stream objStream = request.GetResponse().GetResponseStream()) </code></pre> <p>and then causes a WebException saying that the request has timed out.</p> <p>I have tried this with a <code>WebRequest</code> and <code>HttpWebRequest</code></p> <p>Edit: It seems the code is falling over in <code>request.GetResponse()</code></p> <p>Edit: This post suggests it may be a GC issue --> <a href="http://www.vbforums.com/showthread.php?t=610043" rel="noreferrer">http://www.vbforums.com/showthread.php?t=610043</a> - as per this post the issue is mitigated if Fiddler is open in the background.</p> <p>The server is there and available for requests.</p> <pre><code> private string GetQLMResponse(string URL) { HttpWebRequest request = WebRequest.Create(URL) as HttpWebRequest; request.Credentials = new NetworkCredential(Settings.Default.LicenseUser, Settings.Default.LicensePassword); request.KeepAlive = false; request.Timeout = 5000; request.Proxy = null; // Read stream string responseString = String.Empty; try { using (var response = request.GetResponse()) { using (Stream objStream = response.GetResponseStream()) { using (StreamReader objReader = new StreamReader(objStream)) { responseString = objReader.ReadToEnd(); objReader.Close(); } objStream.Flush(); objStream.Close(); } response.Close(); } } catch (WebException ex) { throw new LicenseServerUnavailableException(); } finally { request.Abort(); request = null; GC.Collect(); } return responseString; } </code></pre> <p>Thrown WebException is:</p> <blockquote> <p>{"The operation has timed out"} [System.Net.WebException]: {"The operation has timed out"} Data: {System.Collections.ListDictionaryInternal} HelpLink: null InnerException: null Message: "The operation has timed out" Source: "System" StackTrace: " at System.Net.HttpWebRequest.GetResponse()\r\n at IQX.Licensing.License.GetQLMResponse(String URL) in C:\Users\jd\SVN\jd\Products\Development\JAD.Licensing\JAD.Licensing\License.cs:line 373" TargetSite: {System.Net.WebResponse GetResponse()}</p> </blockquote> <hr> <p>Update: OK So the following code now works. The servicePoint was setting the timeout to be near 4 minutes. Changing <code>ServicePoint.ConnectionLeaseTimeout</code> on the request object means that the request is now destroyed after 5000ms. Thanks to all for your help and also to these 2 pages:</p> <ol> <li><a href="http://blogs.msdn.com/b/adarshk/archive/2005/01/02/345411.aspx" rel="noreferrer">http://blogs.msdn.com/b/adarshk/archive/2005/01/02/345411.aspx</a></li> <li><p><a href="http://msdn.microsoft.com/en-us/library/6hszazfz(v=VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/6hszazfz(v=VS.80).aspx</a></p> <pre><code>private string GetQLMResponse(string URL) { HttpWebRequest request = WebRequest.Create(URL) as HttpWebRequest; request.Credentials = new NetworkCredential(Settings.Default.LicenseUser, Settings.Default.LicensePassword); request.KeepAlive = false; request.Timeout = 5000; request.Proxy = null; request.ServicePoint.ConnectionLeaseTimeout = 5000; request.ServicePoint.MaxIdleTime = 5000; // Read stream string responseString = String.Empty; try { using (WebResponse response = request.GetResponse()) { using (Stream objStream = response.GetResponseStream()) { using (StreamReader objReader = new StreamReader(objStream)) { responseString = objReader.ReadToEnd(); objReader.Close(); } objStream.Flush(); objStream.Close(); } response.Close(); } } catch (WebException ex) { throw new LicenseServerUnavailableException(); } finally { request.Abort(); } return responseString; } </code></pre></li> </ol>

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