I just tried to rename one of the reports, what should be an easy thing to do, but I got this really weird error message:

System.Web.Services.Protocols.SoapException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. —> Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. —> System.Exception: For more information about this error navigate to the report server on the local server machine, or enable remote errors
at Microsoft.ReportingServices.WebServer.ReportingService2005Impl.GetItemDataSources(String Item, DataSource[]& DataSources)
at Microsoft.ReportingServices.WebServer.ReportingService2006.GetItemDataSources(String Item, DataSource[]& DataSources)

This error did not make any sense to me, so I looked into the Report Server Trace Log for more info and found this:

library!ReportServer_0-11!6028!07/01/2010-14:15:39:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database., ;

library!ReportServer_0-11!6c18!07/01/2010-14:15:39:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database., ;

library!ReportServer_0-11!6028!07/01/2010-14:15:59:: Call to GetPermissionsAction(http://hictatriuap017/sites/DashboardsICTRA/ReportsLibrary/SLA PRD/Report Management Summary.rdl).

library!ReportServer_0-11!6c18!07/01/2010-14:15:59:: Call to GetItemDataSourcesAction(http://hictatriuap017/sites/DashboardsICTRA/ReportsLibrary/SLA PRD/Report Management Summary.rdl).

library!ReportServer_0-11!6c18!07/01/2010-14:15:59:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database., ;

library!ReportServer_0-11!6c18!07/01/2010-14:15:59:: e ERROR: Microsoft.ReportingServices.Diagnostics.Utilities.ReportServerStorageException: An error occurred within the report server database.  This may be due to a connection failure, timeout or low disk condition within the database. —> System.Data.SqlClient.SqlException: Cannot insert duplicate key row in object ‘dbo.Catalog’ with unique index ‘IX_Catalog’.

The statement has been terminated.

For every report in the report library, reporting services creates a record in the Catalog table of the report server database. But when you delete a report, that record doesn’t seem to be deleted.

The catalog table has a unique index on the column “path”, that contains the full path to the report. When I tried to rename the report, it failed because a previously (deleted) report existed with that same name.

You can work around this problem by changing the value of the path column of the old record.

If anyone has more details about this problem or maybe a solution, please leave a comment.

I came to the conclusion that the server always returned this error after exactly 2 minutes, so it had to be a timeout exception.

The report was kind of big, so tuning it would not really help (enough).

I took me some time to find out which timeout setting to change, because there seem be a lot of them:

There is the Query Execution timeout of the Dataset, a Report Execution timeout, the Connection timeout of IIS, other timeouts in the Report Server Configuration file, …

But the real cause of this timeout is an Execution timeout of Sharepoint.

You can change this timeout setting in the web.config of your Sharepoint site, by default in c\:inetpub\wwwroot\wss\VirtualDirectories\80.

In this web.config you will find an XML node called “httpRuntime”. In this node you have to add an extra tag: executionTimeout=”9000″:

<httpRuntime maxRequestLength=”51200″ executionTimeout=”9000″ />

Save and close the file and do an IISReset. When you run the report again, you won’t get this error anymore.

I also checked the web.config of the Report Manager, but in Native Mode this seems to be the default:

Good luck!

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Data Refresh Failed: Unable to retrieve external data for the following connections:

<<connection>>

The data sources may be unreachable, may not be responding, or may have denied you access.

Verify that data refresh is enabled for the trusted file location and that the workbook data authentication is correctly set.

But the file was in an Excel Services Trusted Location and so was the data source.

Finally I found the following error message in the Sharepoint Log (C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\LOGS):

Excel Services can not use credential delegation when it is configured to use a trusted subsystem with Windows SharePoint Server

Ok that explains it: when they installed Excel Services on this new machine they did not configure it to use Delegation Mode.

To change Excel Services to use Delegation Mode, you need to use the command line tool stsadm. Execute the following statements in a command window:

Cd C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\BIN

stsadm -o set-ecssecurity -accessmodel delegation -ssp SharedServices1

stsadm -o execadmsvcjobs

iisreset

This should do it. Enjoy!