Operational Defect Database
BugZero found this defect 1308 days ago.
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Microsoft SQL Server | 10270905
KB4040108 - FIX: Backup of availability database via VSS-based application may fail in SQL Server - Microsoft Support
Last update date:
7/24/2023
Affected products:
SQL Server 2016 Enterprise Core - duplicate (do not use)
SQL Server 2016 Enterprise - duplicate (do not use)
SQL Server 2016 Developer - duplicate (do not use)
SQL Server 2016 Standard - duplicate (do not use)
SQL Server 2017 on Windows (all editions)
SQL Server 2017 on Linux (all editions)
SQL Server 2014 Developer - duplicate (do not use)
SQL Server 2014 Enterprise - duplicate (do not use)
SQL Server 2014 Enterprise Core - duplicate (do not use)
SQL Server 2014 Standard - duplicate (do not use)
SQL Server 2014 Service Pack 2 - duplicate (do not use)
Affected releases:
build lower than 14.0.3006.16
Fixed releases:
14.0.3006.16
Description:
Symptoms
Assume that you use Availability Groups in Microsoft SQL Server. When you use a Volume Shadow Copy Services (VSS)-based application to back up an availability database, the backup operation may Freeze the system I/O indefinitely. This causes the rendering of any other successive operations to wait until VSS explicitly issues a Thaw. If you try to run a transaction log backup of the same database during this time, you may receive the following error message: BACKUP failed to complete the command BACKUP LOG database_name. Check the backup application log for detailed messages. Note Before you receive this error message, you may receive an error message that resembles the following: I/O is frozen on database database_name. No user action is required. However, if I/O is not resumed promptly, you could cancel the backup.
Resolution
This fix is included in the following cumulative updates for SQL Server: Cumulative Update 1 for SQL Server 2017 Cumulative Update 9 for SQL Server 2016 RTM Cumulative Update 5 for SQL Server 2016 Service Pack 1 Cumulative Update 8 for SQL Server 2014 SP2
About SQL Server builds:
Each new build for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest cumulative updates for SQL Server: Latest cumulative update for SQL Server 2017 Latest cumulative update for SQL Server 2016 Latest cumulative update for SQL Server 2014
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
