KB4021469 - FIX: An assertion occurs when you run a query that performs join operations by using MERGE JOIN in SQL Server 2014

Symptoms

When you run a query that performs join operations by using MERGE JOIN in Microsoft SQL Server 2014, you may receive an assertion error that resembles the following:

Comment: 'Stack Trace'

Comment: 'Location:  "qsmerge.cpp":LineNumber

Expression:  m_hrOuter == DB_S_FAKEROW && m_hrInner == DB_S_FAKEROW

SPID:   SPID

Process ID:  ProcessID

Resolution

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

       Cumulative Update 6 for SQL Server 2014 SP2

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 2014 SP1

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 terminologythat Microsoft uses to describe software updates.

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