You use the AlwaysOn availability groups feature in Microsoft SQL Server 2014. When a stalled dispatcher system dump occurs, an automatic failover might occur on the availability groups if the AlwaysOn feature is configured to do this. This failover is expected. However, the failover could cause a brief service outage.
This problem was first fixed in the following cumulative update for SQL Server 2014:
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 2014:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology Microsoft uses to describe software updates.