SQL AlwaysOn Availability Groups Bug

When you’re using SQL AlwaysOn Availability Groups pay attention when applying the following patches: SQL 2012 SP2 CU3 SQL 2012 SP2 CU4 SQL 2014 CU5 The Availability Group may stop synchronizing due to blocking between user queries and a system session. The fix is to disable automatic failover if it is activated, restart the SQL Server instance…