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SQL Always On – Availability Group – Secondary replica DISCONNECTED

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Hi guys

I have a very simple SQL 2017 (Server 2012R2) 2 server always on availability group. The use for this is to host an RDS Connection broker database (to make it highly available). My SQL knowledge is very basic so I followed this guide here pretty much verbatim. I am not sure if this issue has always been there or has happened recently but the secondary replica is showing status of disconnected in SSMS

The Primary shows availability dashboard below:

The secondary the Always On High Availability folder is empty

I have checked firewall ports and 5022 is open and not blocked. I have also checked netstat to confirm sqlsrvr.exe is using 5022 which it is.

Powershell: Get-ClusterResource

I cant find anything obvious in the event logs but:

Secondary

In SSMS the Always on High Availability directory is empty

SSMS AlwaysOn_Health Log

message An...


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