XML parsing error, whitespace expected

Question

I'm seeing this "XML parsing" error in the SSRS Logs once in a while and I don't know what is causing it. The weird thing is that the report doesn't get this error everytime, most of the time it will work. I originally thought that
it might be the data that is being returned but I don't know if this is the case. Usually when a user gets an error, they'll just run it again later and it'll work the 2nd time. I looked at the report parameters in the ExecutionLogStorage table and the same
parameters are passed in each time.
Does anyone have any ideas of where I can look to get to the bottom of this one? Any help is appreciated.
The actual error from the logs is below:
processing!ReportServer_0-26!fdc!05/08/2014-13:33:12:: e ERROR: Throwing Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: , Microsoft.ReportingServices.ReportProcessing.ReportProcessingException: Query execution failed for dataset 'DataSet1'. ---> System.Data.SqlClient.SqlException: XML parsing: line 1, character 121, whitespace expected
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
at System.Data.SqlClient.SqlDataReader.get_MetaData()
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior)
at Microsoft.ReportingServices.DataExtensions.SqlCommandWrapperExtension.ExecuteReader(CommandBehavior behavior)
at Microsoft.ReportingServices.OnDemandProcessing.RuntimeDataSet.RunEmbeddedQuery(Boolean& readerExtensionsSupported, Boolean& readerFieldProperties, List`1 queryParams, Object[] paramValues)
 Thanks,
-Song

Answer 1

Hi Song,
Sorry for the delay.
I am trying to involve someone more familiar with this topic for a further look at this issue. Sometime delay might be expected from the job transferring. Your patience is greatly appreciated.
Thank you for your understanding and support.
Regards,
Katherine Xiong
Katherine Xiong
TechNet Community Support