Symptoms
In Microsoft SQL Server 2014, you run a SELECT query that generates a parallel batch-mode scan (typically scanning a columnstore index). In some cases, the batch-mode scan may be involved in a deadlock situation. In this case, the deadlock is not resolved automatically.
Cause
This problem occurs when a new deadlock cannot be detected and therefore triggers a blocking scenario.
Resolution
This problem was first fixed in the following cumulative update for SQL Server:
Cumulative Update 1 for SQL Server 2014 SP1 /en-us/help/3067839
Cumulative Update 7 for SQL Server 2014 /en-us/help/3046038
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:
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 Microsoft uses to describe software updates.
