FIX: Scheduler deadlock on primary replica when you remove a replica from an AlwaysOn availability group in SQL Server 2012 or SQL Server 2014

Symptoms

When you remove a replica from an AlwaysOn availability group, for example, by using the ALTER AVAILABILITY GROUP statement, as follows:

ALTER AVAILABILITY GROUP group_name REMOVE REPLICA ON 'instance_name' [,...n]


You may find "Deadlocked Schedulers" dump files in the error log on the primary replica.


Resolution

The issue was first fixed in the following cumulative update of SQL Server:
Recommendation: Install the latest cumulative update for SQL Server

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Properties

Article ID: 3088307 - Last Review: Oct 19, 2015 - Revision: 1

Microsoft SQL Server 2012 Service Pack 2, Microsoft SQL Server 2012 Enterprise, Microsoft SQL Server 2012 Developer, Microsoft SQL Server 2012 Standard, Microsoft SQL Server 2012 Web, Microsoft SQL Server 2014 Service Pack 1, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Developer, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Enterprise, Microsoft SQL Server 2014 Standard, Microsoft SQL Server 2014 Standard

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