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FIX: Parallel Query May Cause an Access Violation in CBitSet::Incl

Article ID: 318874 - View products that this article applies to.

This article was previously published under Q318874

BUG #: 356774 (SHILOH_BUGS)

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SYMPTOMS

Running a complex query that results in a parallel plan may cause an Access Violation (AV) to occur.

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To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

290211

(http://support.microsoft.com/kb/290211/EN-US/ )

INF: How To Obtain the Latest SQL Server 2000 Service Pack

NOTE: The following hotfix was created before the release of Microsoft SQL Server 2000 Service Pack 3.

The English version of this fix should have the following file attributes or later:

   Date       Time      Version    Size      File name
   -------------------------------------------------------

   3/7/2002   5:12 PM   8.00.594   7269 KB   Sqlservr.exe

NOTE: Because of file dependencies, the most recent hotfix or feature that contains the files may also contain additional files.

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WORKAROUND

To work around this behavior you can either:

Disable parallelism for this specific query by using the OPTION (MAXDOP 1).

-or-
Disable parallelism on the server by setting the max degree of parallelism configuration option to 1.

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
This problem was first corrected in Microsoft SQL Server 2000 Service Pack 3.

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MORE INFORMATION

The following code sample causes the AV to occur:

SELECT Salesman_dim.SalesmanName
FROM VW_Sls_Plan_Agg_Union, Customer_dim ,vw_Time_dim AGG_dbo_Time_dim_1 ,Salesman_dim
WHERE ( Customer_dim.CustKey=VW_Sls_Plan_Agg_Union.Custkey)  
   AND    (Salesman_dim.SalesmanKey=VW_Sls_Plan_Agg_Union.salesmankey)   
   AND   (AGG_dbo_Time_dim_1.FiscalYr=VW_Sls_Plan_Agg_Union.FiscalYr 
                and    AGG_dbo_Time_dim_1.FiscalMonth = VW_Sls_Plan_Agg_Union.FiscalMonth )
                and   ( AGG_dbo_Time_dim_1.LastDayFisMth ='Y') 
  AND (Customer_dim.SalesChannel + ' '  + Customer_dim.SalesChnDesc =     '1 ELEC DIST.'  
             and  Salesman_dim.SalesmanCode IN ('1U','SW','WA' ))

The SQL Server error log shows the following Stack dump file for SQL Server 2000 Service Pack 2 (8.00.534):

2002-03-08 09:40:04.21 spid51    Using 'dbghelp.dll' version '4.0.5'
*Stack Dump being sent to C:\Program Files\Microsoft SQL Server\MSSQL\log\SQL00005.dmp
2002-03-08 09:40:04.24 spid51    Error: 0, Severity: 19, State: 0
2002-03-08 09:40:04.24 spid51    SqlDumpExceptionHandler: Process 51 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server is terminating this process..
* *******************************************************************************
*
* BEGIN STACK DUMP:
*   03/08/02 09:40:04 spid 51
*
*   Exception Address = 00540EAD (CBitSet::Incl + 00000004 Line 0+00000000)
*   Exception Code    = c0000005 EXCEPTION_ACCESS_VIOLATION
*   Access Violation occurred reading address 00000014
* Input Buffer 1296 bytes -
*  SELECT Salesman_dim.SalesmanName  FROM VW_Sls_Plan_Agg_Union, Customer_d
*  im ,vw_Time_dim AGG_dbo_Time_dim_1 ,Salesman_dim  WHERE ( Customer_dim.C
*  ustKey=VW_Sls_Plan_Agg_Union.Custkey)       AND    (Salesman_dim.Salesma
*  nKey=VW_Sls_Plan_Agg_Union.salesmankey)        AND   (AGG_dbo_Time_dim_1
*  .FiscalYr=VW_Sls_Plan_Agg_Union.FiscalYr                   and    AGG_db
*  o_Time_dim_1.FiscalMonth = VW_Sls_Plan_Agg_Union.FiscalMonth )          
*          and   ( AGG_dbo_Time_dim_1.LastDayFisMth ='Y')     AND (Customer
*  _dim.SalesChannel + ' '  + Customer_dim.SalesChnDesc =     '1 ELEC DIST.
*  '                 and  Salesman_dim.SalesmanCode IN ('1U','SW','WA' ))  
*  

* -------------------------------------------------------------------------------
* Short Stack Dump
* 00540EAD Module(sqlservr+00140EAD) (CBitSet::Incl+00000004)
* 00540EA5 Module(sqlservr+00140EA5) (CPvrBitSet::Incl+00000015)
* 00454E98 Module(sqlservr+00054E98) (CPhyOp_Fetch::InputReqdProp+00000256)
* 00543796 Module(sqlservr+00143796) (COpArg::InputNormalizedReqdProp+0000001F)
* 004E5C25 Module(sqlservr+000E5C25) (CConvertCtx::CConvertCtx+0000019B)
* 004E5A67 Module(sqlservr+000E5A67) (CConvertCtx::PqteConvertChild+0000001D)
* 0046F402 Module(sqlservr+0006F402) (CPhyOp_Fetch::PqteConvert+000000F9)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 004E5A77 Module(sqlservr+000E5A77) (CConvertCtx::PqteConvertChild+0000002D)
* 0048771D Module(sqlservr+0008771D) (CPhyOp_LoopsJoin::PqteConvert+00000041)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 004E5A77 Module(sqlservr+000E5A77) (CConvertCtx::PqteConvertChild+0000002D)
* 0047E655 Module(sqlservr+0007E655) (CPhyOp_HashJoin::ConvertBuildInput+00000202)
* 0047E2B7 Module(sqlservr+0007E2B7) (CPhyOp_HashJoin::PqteConvert+00000164)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 004E5A77 Module(sqlservr+000E5A77) (CConvertCtx::PqteConvertChild+0000002D)
* 0047E2DA Module(sqlservr+0007E2DA) (CPhyOp_HashJoin::PqteConvert+00000192)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 004E5A77 Module(sqlservr+000E5A77) (CConvertCtx::PqteConvertChild+0000002D)
* 0047E2DA Module(sqlservr+0007E2DA) (CPhyOp_HashJoin::PqteConvert+00000192)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 004E5A77 Module(sqlservr+000E5A77) (CConvertCtx::PqteConvertChild+0000002D)
* 0074150B Module(sqlservr+0034150B) (CPhyOp_Concat::PqteConvert+00000184)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 004E5A77 Module(sqlservr+000E5A77) (CConvertCtx::PqteConvertChild+0000002D)
* 004F6AF9 Module(sqlservr+000F6AF9) (CPhyOp_ComputeScalar::PqteConvert+00000043)
* 00542D0E Module(sqlservr+00142D0E) (COptExpr::PqteConvert+000000BC)
* 00542B7A Module(sqlservr+00142B7A) (COptExpr::PqteConvertTree+00000055)
* 005528EE Module(sqlservr+001528EE) (COptContext::PcxteOptimizeQuery+000011D6)
* 00551A3A Module(sqlservr+00151A3A) (CQuery::Optimize+000003F9)
* 00551815 Module(sqlservr+00151815) (CQuery::Optimize+00000030)
* 0054C482 Module(sqlservr+0014C482) (CCvtTree::PqryFromTree+0000029D)
* 0054C230 Module(sqlservr+0014C230) (BuildQueryFromTree+00000046)
* 0054C19D Module(sqlservr+0014C19D) (CStmtQuery::InitQuery+0000013E)
* 004FF9C9 Module(sqlservr+000FF9C9) (CStmtSelect::Init+0000008A)
* 0053546E Module(sqlservr+0013546E) (CCompPlan::FCompileStep+00000AD6)
* 0053BD8F Module(sqlservr+0013BD8F) (CProchdr::FCompile+00000D23)
* 004106AD Module(sqlservr+000106AD) (CSQLSource::FTransform+0000034C)
* 0053C893 Module(sqlservr+0013C893) (CSQLStrings::FTransform+000001A1)
* 00410092 Module(sqlservr+00010092) (CSQLSource::Execute+0000015B)
* 0053C498 Module(sqlservr+0013C498) (language_exec+000003E1)
* 00411099 Module(sqlservr+00011099) (process_commands+000000EC)
* 41073379 Module(UMS+00003379) (ProcessWorkRequests+0000024A)
* 41073071 Module(UMS+00003071) (ThreadStartRoutine+000000BD)
* 7800A27B Module(MSVCRT+0000A27B) (_unDNameEx+00004849)
* 77E8758A Module(KERNEL32+0000758A) (SetFilePointer+0000018A)
* -------------------------------------------------------------------------------
2002-03-08 09:40:07.19 spid51    Error: 0, Severity: 19, State: 0
2002-03-08 09:40:07.19 spid51    language_exec: Process 51 generated an access violation. SQL Server is terminating this process..

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