KB4136912 - Multiple device VDI backup can hang on Linux

Applies to: SQL Server 2017 DeveloperSQL Server 2017 EnterpriseSQL Server 2017 Enterprise Core


Assume that you have Microsoft SQL Server 2017 on Linux. When you try to back up a database by using Virtual Device Interface (VDI) and multiple devices are specified, the backup operation may hang during GetCommand.


A fix for this problem is included in Cumulative Update 7 for SQL Server 2017.


You can change the VDI client code to wait until the first device has completed one call to GetCommand before secondary devices call GetCommand.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


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