Hi,
 
We have developed one application which authenticates EM user id and PIN with CUCM. Sometimes this API fails and the error details are as below.
 
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Full information as follows:
Source:  System.Web.Services
Message:  The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
Stack Trace:  GetWebResponse
   at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
   at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at Metreos.AxlSoap713.AXLAPIService.doAuthenticateUser(AuthenticateUserReq doAuthenticateUser1)
   at Metreos.Native.AxlSoap713.DoAuthenticateUser.Execute(SessionData sessionData, IConfigUtility configUtility)
2011:03:10::15:37:47(76): Error: LockUnlock_Login-2814 Application: Mars LockUnlock [MARS_EM_Login] : Error while calling function DoAuthenticationUser713  for user 11179
 
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Can anyone suggest what could be the reason? Let us know if we need to increse value of any parameter in CUCM.
 
Regards,
Umesh