Article ID: 307541 - Last Review: June 29, 2004 - Revision: 4.0

FIX: Error 1203 and Failed Assertion Occurs When You Run a Query with a Parallel Plan

View products that this article applies to.

This article was previously published under Q307541

BUG #: 101982 (SQLBUGS_70)

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SYMPTOMS

A query that uses a parallel plan and requires lock escalation may fail with the following type of error message:

Error: 1203, Severity: 20, State: 1 Process ID 14 attempting to unlock unowned resource TAB: 8:1922105888 []..

The error message is followed by a stack dump that is written to the SQL Server error log for the following assertion:

SQL Server Assertion: File: <proc.c>, line=1931 Failed Assertion = 'm_activeSdesList.Head () == NULL'.

At this point, an abnormal termination of SQL Server may occur.

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To resolve this problem, obtain the latest service pack for Microsoft SQL Server 7.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

301511 (http://support.microsoft.com/kb/301511/EN-US/ ) INF: How to Obtain the Latest SQL Server 7.0 Service Pack

NOTE: The following hotfix was created prior to Microsoft SQL Server 7.0 Service Pack 4.

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

   Version      File name
   --------------------------

   7.00.1008    Sqlservr.exe

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

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WORKAROUND

To work around this problem either:

Use the MAXDOP hint set to 1 for the query that encounters the problem. -or-
Change 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 7.0 Service Pack 4.

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