FIX: An access violation occurs intermittently when you run an application that uses SQL Server 2005 service broker or SQL Server 2008 service broker
Symptoms
When you run an application that uses Microsoft SQL Server 2005 service broker or Microsoft SQL Server 2008 service broker, an access violation occurs intermittently. Then, error messages that resemble the following arelogged in the SQL Server error log file:
<Date Time>,spid76,Unknown,Service Broker needs to access the master key in the database ‘<Database Name>’. Error code:25. The master key has to exist and the service master key encryption is required.
<Date Time>,spid22s,Unknown,*
<Date Time>,spid22s,Unknown,* Access Violation occurred reading address 0000000000000000
<Date Time>,spid22s,Unknown,* Exception Code = c0000005 EXCEPTION_ACCESS_VIOLATION
<Date Time>,spid22s,Unknown,* Exception Address = 0000000002B8FA73 Module(sqlservr+0000000001B8FA73)
<Date Time>,spid22s,Unknown,*
<Date Time>,spid22s,Unknown,*
<Date Time>,spid22s,Unknown,*
<Date Time> spid 22
<Date Time>,spid22s,Unknown,* BEGIN STACK DUMP:
<Date Time>,spid22s,Unknown,*
<Date Time>,spid22s,Unknown,* *******************************************************************************
<Date Time>,spid22s,Unknown,SqlDumpExceptionHandler: Process 22 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION.
SQL Server is terminating this process.
<Date Time>,spid22s,Unknown,***Stack Dump being sent to C:\Microsoft SQL Server\MSSQL.1\MSSQL\LOG\SQLDump0001.txt
<Date Time>,spid22s,Unknown,An error occurred in the Service Broker internal activator while trying to scan the user queue ‘<User Queue>’ for its status. Error: 2905<c/> State: 2.These error messages describe the following sequence of events. An error occurs when SQL Server 2005 or SQL Server 2008 accesses the master key. This error causes the access violation. Additionally, other errors occur when SQL Server 2005 or SQL Server 2008 tries to scan the user queue.
Note A mini-dump file is generated in the SQL Server logfolder.
Resolution
This problem occurs because of a race condition between the alter operation for a queue whose status is “on” and the drop operation for the same queue. If the drop operation succeeds, the access violation occurs. Additionally, the queue cannot be scanned successfully aspart of the alter operation.