Assume that you restore a compressed backup in Microsoft SQL Server 2014, 2016 and 2017. Occasionally, the restore operation may fail with the following error message:

Error: 17066, Severity: 16, State: 1.

SQL Server Assertion: File:FileName, line=LineNumber Failed Assertion = '!m_ActiveConsumptionList.IsEmpty () || !m_ActiveReads.IsEmpty () || !m_DecodeOutputQ.IsEmpty ()'. This error may be timing-related. If the error persists after rerunning the statement, use DBCC CHECKDB to check the database for structural integrity, or restart the server to ensure in-memory data structures are not corrupted.


This issue is fixed in the following cumulative updates for SQL Server:

       Cumulative Update 13 for SQL Server 2017

       Cumulative Update 4 for SQL Server 2016 SP2

       Cumulative update 12 for SQL Server 2016 SP1

       Cumulative Update 1 for SQL Server 2014 SP3

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out 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


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


Learn about the terminologythat Microsoft uses to describe software updates.

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