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Getting "underlying connection was closed..." error on HttpWebRequest()

Posted on 2009-05-08
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Last Modified: 2013-12-17
We have a console application using HttpWebRequest on Win Server with .net 3.5. Intermittently, we get errors :

  The underlying connection was closed: An unexpected error occurred on a send. 

How can we correct this ?

Any advantage in adding ServicePointManager.MaxServicePoints and ServicePointManager.MaxServicePointIdleTime ?

Where would these be set  ?

Thank you,
Gary Davis
 
HttpWebRequest webReq = (HttpWebRequest)WebRequest.Create(&.);

webReq.Method = "POST";

webReq.ContentType = "text/xml";

webReq.Headers.Add("Authorization", "Basic " + strAccount);

webReq.AuthenticationLevel = System.Net.Security.AuthenticationLevel.None;

webReq.KeepAlive = false;
 

HttpWebResponse webResp = (HttpWebResponse)webReq.GetResponse();
 

Stream stream = webResp.GetResponseStream() as Stream;

byte[] buffer = new byte[32 * 1024];

int nRead = 0;

MemoryStream ms = new MemoryStream();
 

do

{

 nRead = stream.Read(buffer, 0, buffer.Length);

 ms.Write(buffer, 0, nRead);

} while (nRead > 0);

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Question by:Gary Davis
2 Comments
 
LVL 11

Accepted Solution

by:
Muhammad Ousama Ghazali earned 500 total points
ID: 24348255
The problem you are facing has been officially documented by Microsoft here: http://support.microsoft.com/default.aspx?scid=kb;EN-US;915599

For additional support, you may see this link too: http://weblogs.asp.net/jan/archive/2004/01/28/63771.aspx
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LVL 18

Author Comment

by:Gary Davis
ID: 24400216
I have reviewed the sources and I am still seeing occasional issues so will try some different possibilities. I am closing this in any case.
Thanks
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