Assume that you use Always On Availability Groups in Microsoft SQL Server 2017 on Linux. The startup of a database that belongs to an availability group may time out. Additionally, a stack dump is generated on the primary replica, and an error message that resembles the following is logged on the secondary replica:
A connection timeout has occurred while attempting to establish a connection to availability replica replica_name with id replica_id. Either a networking or firewall issue exists, or the endpoint address provided for the replica is not the database mirroring endpoint of the host server instance.
This fix is included in the following update for SQL Server:
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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