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

Posted on 2006-07-19
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Last Modified: 2008-01-09
Hi,
 I am working on Asp.net application, which has webservice layer and buisness layer, in its BL we are calling 3rd party webservice, but many time we got this error.
We try to solve it by setting ScriptTimeout( at webservice) and Timeout (of Proxy) properties.
We try it with KeepAlive property(but someetimes it creates problem at window application)
so i don't know which approach i should proceed?
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Question by:rinkujain
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by:pradeepsudharsan
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by:rinkujain
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Thnx pradeepsudharsan to reply on these, actully we have tried with keepalive thing(as in all links given by you talked about that), but its not solving our purpose, so is there is any other proxy setting or dependency, which we need to take care of ?
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Bob Learned earned 250 total points
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1) Where is the problem?

2) Have you talked to the 3rd party web service people about the possibility that this error is coming from them?

Bob
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by:rinkujain
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Problem is coming when we are dealing with 3rd party web service.

Actually we are having scenario like this:

our application used by 2 application:
1 Siebel (web application)
2 LeadTrac (Window Based application , in VB)

now KEEPALIVE thing working fine for Siebel, but for window application sometimes it works abnormally, and so we have to comment that one.

that means we wanna work around for this problem for window app as well as web application.

Hope now its clear.......
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by:Bob Learned
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What are you using in the Windows application to access the page?

Bob
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by:rinkujain
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We have not developed that , its another company project, and they are using our pages from there,
but i think may be they r using IE control or iframe sort of to access it.
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by:Bob Learned
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It is important to understand how the pages are being accessed and how the web site is interacting with the web service and where the bottlenecks are.  Without that knowledge, it is very difficult (if not impossible) to find a solution.

Bob
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by:rinkujain
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ok, i asked them , and come to know that they are using SOAP tool kit for that.
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by:Bob Learned
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Well, that starts to answer the question, but not nearly enough detail.  What SOAP tool kit version?  Is this an ASP.NET web service?  Calling web services from a Windows application usually should be just the same as from a web application, but doesn't take into account special environments.

Bob
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by:rinkujain
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its soap tookit ver 3.0
and for web page they are using IE control
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by:Bob Learned
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Is there any kind of proxy/firewall?

Bob
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by:rinkujain
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yes proxy is there
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by:Bob Learned
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Can you give me an example of how you are trying to access from Windows application?  Are you using a WebProxy?

Bob
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by:rinkujain
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in code we are  not setting any proxy related information, while its in config file.where we define the port to use.
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by:Bob Learned
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That is still not enough detail about what you are trying to do.

Bob
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by:rinkujain
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Ok i am expaining the scenario :
-our is a web application
-when Windows Authentication is unchecked and keepalive property set at proxy class , then it was working fine.

-when Windows Authentication is checked and keepalive property set at proxy class , then it was working fine.
 But then it was giving problem sometime for page rendering.

-so we removed keepalive setting for Windows Authentication is checked and set the timeout value to -1, but then it is giving problem od Connection Closed sometimes.

Thanks
Rinku
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by:Bob Learned
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Rinku,

Are you creating an instance of the web service in the Windows application?  How are you doing that?  How are you calling the web service methods?

Bob
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by:rinkujain
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yes, as that application calling our pages too, and in the page we are creating instance of web service. and if they wanna use web service directly then they use it thru Soap toolkit.

Hope now all scenario is clear to u.
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by:Bob Learned
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Clear as mud (if you understand that American expression).  You have not explained anything that would help me help you with this fairly complex problem.

Bob
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by:rinkujain
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Calling web service from VB app:
------------------------------------------------------------
Call GetIniValue("CSB", "CSB_WSDL", strCSBWSDL)
Call GetIniValue("CSB", "CSB_Service", strCSBService)
Call GetIniValue("CSB", "CSB_SOAP", strCSBSOAP)

If strCSBWSDL = "" Or strCSBService = "" Or strCSBSOAP = "" Then
   MsgBox "Error occured during processing. " & vbNewLine & "Please contact system administrator."
Else
    Set soapClient = CreateObject("MSSOAP.SoapClient30")
    Call soapClient.MSSoapInit(strCSBWSDL, strCSBService, strCSBSOAP)
    soapClient.ConnectorProperty("Timeout") = 0
    intCSStatus = soapClient.GetCreditDecisionXML(strCreditDecision)
End if
-----------------------------------------------------------------

Calling webpage from VB app:
----------------------------------------------------------------


   Screen.MousePointer = vbHourglass
    With Wb1
        .Navigate2 strURL
    End With
    Screen.MousePointer = vbDefault


---------------------------------------------
is the picture clear now?
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by:Bob Learned
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Have you looked into adding a web reference to the web service, and use the SOAP methods that come with web services?

Bob
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by:rinkujain
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not getting you, if you are talking abt whether we have used web methods in local env, then yes our all pages dealt with web service only, its working fine here....
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by:rinkujain
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But we are in .net, so we can test only that vb application is of diff company, they are just using our application
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by:Bob Learned
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Ok, let's try this:

1) Add a web reference, pointing to the URL for the web service
2) Create an instance of the web service

   Dim service As ExampleWebService.Service

3) Call a web method:

   Dim creditXml As String = service.GetCreditDecisionXML()

Bob
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by:rinkujain
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I am doing in this way only, not getting you what u wanna say ?
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by:Bob Learned
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That was only an example of creating a reference to a web service.  How are you doing it?

Bob
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by:rinkujain
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yes in the same way, but we are also applying TimeOut property of webservice object.
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by:Bob Learned
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I still haven't seen anything that would explain your problems.

Bob
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by:rinkujain
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thnx Bob that atleast u tried and spend a good amount of time with me to figure out the problem.
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