Event ID - 1203

Event Id1203
DescriptionProcess ID %d attempting to unlock unowned resource %.*ls.
Event InformationAccording to Microsoft

This error occurs when Microsoft® SQL Server™ is engaged in some activity other than normal post-processing cleanup and it finds that a particular page it is attempting to unlock is already unlocked. The underlying cause for this error may be related to structural problems within the affected database. SQL Server manages the acquisition and release of pages to maintain concurrency control in the multi-user environment. This mechanism is maintained through the use of various internal lock structures that identify the page and the type of lock present. Locks are acquired for processing of affected pages and released when the processing is completed.
Execute DBCC CHECKDB against the database in which the object belongs. If DBCC CHECKDB reports no errors, attempt to reestablish the connection and execute the command.
Important If executing DBCC CHECKDB with one of the repair clauses does not correct the index problem, or if you are unsure what effect DBCC CHECKDB with a repair clause has on your data, contact your primary support provider.
Reference LinksEvent Id:1203 of Source Id:MSSQLServer

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