Developing dotnet architect: 2010-06

I was adding new fields to our TFS workitems the other day and wanted them to be part of the olap cube. But when I added them (marked them with the reportable attribute) and processed the cube, i couldn't see them in the cube.
I went reading the Event log on the Data tier of the TFS and found log entries like below


TF53010: The following error has occurred in a Team Foundation component or extension:
Date (UTC): 2010-06-09 09:31:26
Machine: MyTfsServer
Application Domain: /LM/W3SVC/830720315/Root/Warehouse-3-129205184075330719
Assembly: Microsoft.TeamFoundation.Warehouse, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a; v2.0.50727
Process Details:
 Process Name: w3wp
 Process Id: 9316
 Thread Id: 8484
 Account name: DOMAIN\admin

Detailed Message: The pending configuration changes were not successfully added to
the cube because of the following error: Microsoft.AnalysisServices.OperationException: 
XML parsing failed at line 1, column 0: A document must contain exactly one root element.
.
Errors in the metadata manager. An error occurred when instantiating a metadata 
object from the file, '\\?\C:\Program Files\Microsoft SQL Server\MSSQL.3\OLAP\Data
\TfsWarehouse.0.db\Team System.63837.cub.xml'.

  at Microsoft.AnalysisServices.AnalysisServicesClient.SendExecuteAndReadResponse(ImpactDetailCollection impacts, Boolean expectEmptyResults, Boolean throwIfError)
  at Microsoft.AnalysisServices.AnalysisServicesClient.Alter(IMajorObject obj, ObjectExpansion expansion, ImpactDetailCollection impact, Boolean allowCreate)
  at Microsoft.AnalysisServices.Server.Update(IMajorObject obj, UpdateOptions options, UpdateMode mode, XmlaWarningCollection warnings, ImpactDetailCollection impactResult)
  at Microsoft.AnalysisServices.Server.SendUpdate(IMajorObject obj, UpdateOptions options, UpdateMode mode, XmlaWarningCollection warnings, ImpactDetailCollection impactResult)
  at Microsoft.AnalysisServices.MajorObject.Update(UpdateOptions options, UpdateMode mode, XmlaWarningCollection warnings)
  at Microsoft.AnalysisServices.MajorObject.Update(UpdateOptions options)
  at Microsoft.TeamFoundation.Warehouse.OlapCreator.CreateOlap(WarehouseConfig whConf, String accessUser, String[] dataReaderAccounts, Boolean dropDB, Boolean processCube)
  at Microsoft.TeamFoundation.Warehouse.AdapterScheduler.EnsureCubeIsUpToDate()

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

I searched the path in the error message above (on the database server, little bit confusing since the path seems to be a local one, but since the error originates from the database server it makes sense).

I the folder i found several files named Team System.xxxx.cub.xml (where xxxx is digits) and some where 0 bytes long and some contained error xml (seemed to be cut in the middle of writing).
I removed these files and processed the cube again. (I used the Warehousecontroller webservice on the tfs server, https://mytfsserver:8143/Warehouse/v1.0/WarehouseController.asmx?op=Run)

This time the processing went through without any problems and the fields apperared in my cube.

I wonder how these error xml files where created, perhaps if the cube was instructed to reprocess while the iis was restarted or for some other reason.
I'll better check the folder once and a while....

2010-06-09

TF53010: Errors in the metadata manager when rebuilding OLAP cube