BUG: 1203 If Attentions During Maintenance to Nonclustered Index

• Microsoft SQL Server, version 6.5

SYMPTOMS

If SQL Server receives an attention signal during the maintenance to a table's nonclustered index after an insert operation, message 1203 may be generated. Attention signals are caused by a query timeout expiring, or by using the dbcancel() or SQLCancel() functions within DB-Library or ODBC programs, respectively. The following is message 1203:

   Msg  1203 Level 20 State 1
   Caller of lock manager is incorrectly trying to unlock an unlocked
   object. spid=10 locktype=6 dbid=4 lockid=353

WORKAROUND

To work around this problem, increase the query timeout or avoid using cancel functions. Also, if there is only one index and it is a nonclustered index, you can change the index to a clustered index to avoid the problem.

STATUS

Microsoft has confirmed this to be a problem in SQL Server version 6.5. A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.