Intermittent error SSRS ReportViewer RemoteReport

Question

Hello,
We are receiving intermittent time outs like the following:
 Unable to connect to the remote server
   at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request)
   at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request)
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.GetWebResponse(WebRequest request)
   at Microsoft.Reporting.WebForms.SoapReportExecutionService.ServerReportSoapProxy.GetWebResponse(WebRequest request)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.ReportExecutionService.Invoke(String methodName, Object[] parameters)
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.ReportExecutionService.SetExecutionParameters2(ParameterValue[] Parameters, String ParameterLanguage)
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.<>c__DisplayClasse.<SetExecutionParameters>b__c()
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.ProxyMethodInvocation.Execute[TReturn](RSExecutionConnection connection, ProxyMethod`1 initialMethod, ProxyMethod`1 retryMethod)
   at Microsoft.Reporting.WebForms.SoapReportExecutionService.SetExecutionParameters(IEnumerable`1 parameters, String parameterLanguage)
   at Microsoft.Reporting.WebForms.ServerReport.SetParameters(IEnumerable`1 parameters)
Unable to connect to the remote server
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.GetSecureMethods()
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.IsSecureMethod(String methodname)
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.SetConnectionSSLForMethod(String methodname)
   at Microsoft.Reporting.WebForms.Internal.Soap.ReportingServices2005.Execution.RSExecutionConnection.ProxyMethodInvocation.Execute[TReturn](RSExecutionConnection connection, ProxyMethod`1 initialMethod, ProxyMethod`1 retryMethod)
   at Microsoft.Reporting.WebForms.SoapReportExecutionService.LoadReport(String report, String historyId)
   at Microsoft.Reporting.WebForms.ServerReport.EnsureExecutionSession()
   at Microsoft.Reporting.WebForms.ServerReport.GetParameters()
Frequency of exceptions seems to be related to server load. We tried to research and extended every time out setting we found related to SSRS. For example in the following articles...
http://stackoverflow.com/questions/840629/reporting-services-report-timeout
http://www.avyuktasolutions.com/blog/sql-server-reporting-services-timeout-settings/
Nothing seems to resolve the issue.
Is there anything else to check or adjust?
Thanks!

Answer 1

Hi aosmv77,
Based on you description you are experiencing the issue with the connection of the remote server, you got the timeout error and unable to connect to the report server, right?
The error can be caused by various reasons :one is the web application is unable to open a socket over the port(e.g:80/8080), have the conflicts on the port, another possible reason is that the Firewall blocks the requests from the Web Application.
So, you can try to use a different port for the Report Server Web Service URL reservation.
I have some suggestions for you to do troubleshootings for this issue:
Add new Firewall Inbound Rules for specific TCP/IP ports (that report server and web application use).
referring to the following article:
Configure a Firewall for Report Server Access .
Open your Reporting Service Configuration Manager and make sure the report manager virtual directory is configured correctly. Try to change a different port for report server web service URL reservation.
Open the IIS to check and try use the same port number and authentication in ReportManager website with ReportServer's.
Open the windows Services page, and try to access ReportManger website again with disabling the Window Firewall/Internet Connection Sharing.
If the step1-step4 don't work, please also do below setting:
Go to the ReportServer folder(path like:"C:\Program Files\Microsoft SQL Server\MSRS10_50.MSSQLSERVER\Reporting Services\ReportServer")to find out the "rsReportServer.config" file and open to search for "SecureConnectionLevel" and
set the value to "0":
Similar threads for your reference:
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/036458d2-d296-4806-b94d-594f586556f9/error-unable-to-connect-to-the-remote-server
http://skamie.wordpress.com/2011/05/26/ssrs-error-unable-to-connect-to/
If you still have any question, please feel free to ask.
Regards
Vicky Liu