Microsoft KB Archive/139890

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BUG:LogReader Can Fail to Insert Jobs if Sync Task is Running

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Q139890

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The information in this article applies to:


 * Microsoft SQL Server version 6.0

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BUG# NT: 11993 (6.00)

SYMPTOMS
The LogReader replication task can fail with Msg 2601:

Unable to insert duplicate key row in object 'MSjobs' with unique index 'ucMSjobs'

when you execute sp_MSadd_job while the SYNC task is executing.

CAUSE
You will most likely see this problem if the LogReader is continually reading published table changes from the transaction log while the SYNC task is executed. There is no relation to what publication is being "sync'd" for this problem. This problem will only occur if the SYNC task has to add new jobs as part of a new subscription or scheduled table refresh event. This problem may be rarely encountered even when the LogReader and SYNC tasks are running concurrently.

WORKAROUND
Schedule the LogReader and SYNC tasks to run at different times.

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Reduce the batch size for the LogReader task (-b parameter). More information on this parameter can be found in the SQL Server "Administrator's Companion" in Chapter 16, "Scheduling Tasks."

STATUS
Microsoft has confirmed this to be a problem in Microsoft SQL Server 6.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: sql6 replication jobs batch

Keywords : kbusage

Issue type :

Technology : kbSQLServSearch kbAudDeveloper kbSQLServ600