FIX: Concurrent Execution of Keyset Cursors may Cause AV & SDES Errors

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This article was previously published under Q233542

BUG #: 55067 (SQLBUG_70)

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SYMPTOMS

A server, on which concurrent execution of keyset cursors are occurring, may experience handled exceptions, SDES errors, assertions and server hangs. Examples of each of these types of errors include:

SDES Errors
Found active sdes for spid 262 tabid -862926011 in clean_process

Handled Exceptions:
(ntdll+790b) (ZwGetContextThread+b)
(sqlservr+37cca7) (utassert_fail+1a0)
(sqlservr+2e8920) (XDES::ReportStateError+7d)
(sqlservr+1ad068) (XDES::Commit+52)
(sqlservr+382d) (closetable+263)
(sqlservr+1c7b82) (CDBWorkTable::DestroyScans+c4)
(sqlservr+1c18a3) (CCursorExecContext::DestroyTempTablesScans+12)
(sqlservr+1c2253) (CCursor::Close+ab)
(sqlservr+1c2176) (CCursor::Open+145)
(sqlservr+1bfcff) (CCursorSimpleStmt::XretExecute+a1)
(sqlservr+15aa3) (CMsqlExecContext::ExecuteStmts+118)
(sqlservr+15562) (CMsqlExecContext::Execute+16b)

(KERNEL32+1d4cb) (RaiseException+6a)
(sqlservr+2ef55d) (stackTraceException+53)
(sqlservr+2ef51a) (stackTrace+255)
(sqlservr+37cca7) (utassert_fail+1a0)
(sqlservr+1b2bd4) (ExecutionContext::Cleanup+6f)
(sqlservr+10e5e9) (PSS::~PSS+111)
(sqlservr+10e4d5) (destroyPssMemory+19)
(sqlservr+10e2d6) (freepss+131)
(sqlservr+10ed69) (kill_proc+4e5)
(sqlservr+2e9fa7) (h_access_violation+1a9)
(sqlservr+1afdb7) (language_exec+627)
(opends60+1253) (execute_event+659)
(opends60+144e) (process_commands+f3)
(ums+29ea) (ProcessWorkRequests+ed)
(ums+33e6) (ThreadStartRoutine+139)
(MSVCRT+bee4) (beginthread+ce)
(KERNEL32+4f3e) (lstrcmpiW+be)
(sqlservr+ffc00000)

Assertion
SQL Server Assertion: File: <xdesmgr.c>, line = 1774
Failed Assertion = 'FALSE' Invalid XDES state transition from INVALID to COMMITTING context: 2

Other Errors:
Error occurred during cursor close.
Error occurred during cursor cleanup.

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CAUSE

This resulted from a bug in the merge back from SP1 sources to the QFE tree. A block of code in one file was copied rather than moved so two work tables were created upon cursor execution when there should only have been one.

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WORKAROUND

This was an error in the build of QFE 7.0.0656, and therefore will not affect any customers who are not using that hotfix.

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STATUS

Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 1 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

232570 (http://support.microsoft.com/kb/232570/ ) INF: How to Obtain Service Pack 1 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0

For more information, contact your primary support provider.

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