You have an update statistics query that uses hash aggregate operators in the query execution plan in an instance of Microsoft SQL Server. When the query runs, you receive a "corrupted index" message (Error 9100), and you lose your client connection to the server.
This problem is fixed in the following updates for SQL Server:
Cumulative Update 12 for SQL Server 2014 Service Pack 2
Service Pack information for SQL Server:
This issue is fixed in the following service pack for SQL Server:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.