This issue occurs when you enable a query that reads committed snapshot isolation with clustered columnstore index (CCI).


This issue occurs because an undetected deadlock occurs in a lock, in mutex, and in the parallel query.


Cumulative update information

The issue was first fixed in the following cumulative update for Microsoft SQL Server 2014:

Cumulative Update 4 for SQL Server 2014 SP1

Recommendation Install the latest cumulative update for SQL Server

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