SCCM 2012 Reports stopped working

Question

Reports were working fine then when I tried again about an hour later I suddenly got the following error:
An error has occurred during report processing. ---> Microsoft.ReportingServices.ReportProcessing.ProcessingAbortedException: An error has occurred during report processing. ---> Microsoft.ReportingServices.ReportProcessing.ReportProcessingException:
Cannot impersonate user for data source 'AutoGen__5C6358F2_4BB6_4a1b_A16E_8D96795D8602_'. ---> Microsoft.ReportingServices.Diagnostics.Utilities.LogonFailedException: Log on failed. Ensure the user name and password are correct. ---> System.Exception:
For more information about this error navigate to the report server on the local server machine, or enable remote errors
Microsoft.ConfigurationManagement.ManagementProvider.SmsException
An error has occurred during report processing.
Stack Trace:
   at Microsoft.ConfigurationManagement.AdminConsole.SrsReporting.ParameterPresenter.GetParameters()
   at Microsoft.ConfigurationManagement.AdminConsole.SrsReporting.ParameterPresenter.LoadParameters(IReport report, Collection`1 navigationParameters, IResultObject resultObject)
   at Microsoft.ConfigurationManagement.AdminConsole.SrsReporting.ReportViewerPresenter.Worker_DoWork(Object sender, DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
System.Web.Services.Protocols.SoapException
An error has occurred during report processing. ---> Microsoft.ReportingServices.ReportProcessing.ProcessingAbortedException: An error has occurred during report processing. ---> Microsoft.ReportingServices.ReportProcessing.ReportProcessingException:
Cannot impersonate user for data source 'AutoGen__5C6358F2_4BB6_4a1b_A16E_8D96795D8602_'. ---> Microsoft.ReportingServices.Diagnostics.Utilities.LogonFailedException: Log on failed. Ensure the user name and password are correct. ---> System.Exception:
For more information about this error navigate to the report server on the local server machine, or enable remote errors
Stack Trace:
   at Microsoft.ConfigurationManagement.AdminConsole.SrsReporting.ParameterPresenter.GetParameters()
   at Microsoft.ConfigurationManagement.AdminConsole.SrsReporting.ParameterPresenter.LoadParameters(IReport report, Collection`1 navigationParameters, IResultObject resultObject)
   at Microsoft.ConfigurationManagement.AdminConsole.SrsReporting.ReportViewerPresenter.Worker_DoWork(Object sender, DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
   at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
 I'm also seeing this in the error logs:
Log Name:      Application
Source:        SMS Server
Date:          5/28/2013 4:00:33 PM
Event ID:      7403
Task Category: SMS_SRS_REPORTING_POINT
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      Cor-sccm-02.FRIVER.LOCAL
Description:
On 5/28/2013 4:00:33 PM, component SMS_SRS_REPORTING_POINT on computer Cor-sccm-02.FRIVER.LOCAL reported:  The report server service is not running on Reporting Service Point server "Cor-sccm-02.FRIVER.LOCAL"; start the service to enable reporting.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="SMS Server" />
    <EventID Qualifiers="49152">7403</EventID>
    <Level>2</Level>
    <Task>85</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2013-05-28T20:00:33.000000000Z" />
    <EventRecordID>435798</EventRecordID>
    <Channel>Application</Channel>
    <Computer>Cor-sccm-02.FRIVER.LOCAL</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Cor-sccm-02.FRIVER.LOCAL</Data>
       <Data>On 5/28/2013 4:00:33 PM, component SMS_SRS_REPORTING_POINT on computer Cor-sccm-02.FRIVER.LOCAL reported:  </Data>
    <Data>
    </Data>
  </EventData>
</Event>
On 05/29/13 08:03:08, component SMS_SITE_COMPONENT_MANAGER on computer COR-SCCM-02.FRIVER.LOCAL reported:  Site Component Manager failed to reinstall this component on this site system.
I uninstalled and reinstalled the Reporting role from the SCCM server but that doesn't seem to have resolved the issue, any suggestions?

Answer 1

Ok so I am in the same boat as a number of you and I have an account called reportsuser which is used to generate the ConfigMgr reports. Following RundG's suggestion I added the reportsuser to the local policy to Allow log on locally and then I restarted
the report server and I get the same results. I tried a number of other things including adding the sysadmin SQL role to the reportsuser and adding the reportsuser to the local Administrators group for the server hosting SQL and nothing has resolved this issue
for me. I need to be able to run reports again so I need some additional guidance.
I looked at my SRSRP.LOG and found no errors there so as far as ConfigMgr is concerned the communication between the Reporting Server and CM is fine. I also checked the site: http://servername/Reportserver and it shows that Reporting Server is running but
if I logged on to the page with reportsuser I can't see any reports. When I logon using my smsadmin account I can at least see reports but when I attempt to access one I get the following:
An error has occurred during report processing. (rsProcessingAborted) Cannot impersonate user for data source 'DataSource1'. (rsErrorImpersonatingUser) Log on failed. Ensure the user name and password are correct. (rsLogonFailed)
Object reference not set to an instance of an object. 
which in turn created this log entry:
processing!ReportServer_0-1!490!06/09/2014-10:52:49:: e ERROR: Throwing Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: , Microsoft.ReportingServices.ReportProcessing.ReportProcessingException:
Cannot impersonate user for data source 'DataSource1'. ---> Microsoft.ReportingServices.Diagnostics.Utilities.LogonFailedException: Log on failed. Ensure the user name and password are correct. ---> System.NullReferenceException: Object reference not
set to an instance of an object.