Question

When I call the restful service with the following code, I am getting the error

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

Code:

    Const url As String = "http://localhost:8003/Tracker/Tracker.svc/GetTrackerDetails"

        ServicePointManager.MaxServicePointIdleTime = 500
        ServicePointManager.UseNagleAlgorithm = True
        ServicePointManager.Expect100Continue = True
        ServicePointManager.CheckCertificateRevocationList = True
        ServicePointManager.DefaultConnectionLimit = ServicePointManager.DefaultPersistentConnectionLimit

        req = DirectCast(WebRequest.Create(url), HttpWebRequest)
        req.Method = "POST"
        req.ContentType = "application/xml; charset=utf-8"
        req.Timeout = 300000
        req.KeepAlive = False
        req.Headers.Add("SOAPAction", url)


        Dim xmlDoc = New XmlDocument With {.XmlResolver = Nothing}

        xmlDoc.Load(Server.MapPath("Request.xml"))
        Dim sXml As String = xmlDoc.InnerXml
        req.ContentLength = sXml.Length
        Dim sw = New StreamWriter(req.GetRequestStream())
        sw.Write(sXml)
        sw.Close()

        res = DirectCast(req.GetResponse(), HttpWebResponse)
        Dim responseStream As Stream = res.GetResponseStream()
        Dim streamReader = New StreamReader(responseStream)

        'Read the response into an xml document
        Dim soapResonseXmlDocument = New XmlDocument()
        soapResonseXmlDocument.LoadXml(streamReader.ReadToEnd())


        TextBox1.Text = Server.HtmlDecode(soapResonseXmlDocument.InnerXml)
        soapResonseXmlDocument.LoadXml(TextBox1.Text)

I am facing this error for the past few days. What is wrong with my calling code. Please help me out.

Answer 1

You should install some logging on the connection, in this case I would guess the request or response is to big for the client or server.