“When the principal database server fails, the client application receives errors in response to API calls, which indicate that the connection to the database hasīeen lost.
I found the article below for your reference. In my option, it’s default behavior when the principal database server fails, and And Lync Server performance on virtual topologies can vary greatly depending on the workloadsīeing used, the number of users, and the host hardware.Īs for your second question, it is related to the SQL Server, I’m not familiar with SQL server. Platform: Virtual Servers - VMWare ESXi 6.0Īpplication on Front End Servers: Skype for Business 2015Ĭommonly a network error, maybe the primary server lost connection during that time. The login errors, is that some sort of permissions issue on the Mirror SQL Server and how do I correct that? Event viewer is not giving me a whole lot.Ģ. What would cause the databases to move? Not sure what went wrong with Role Synchronization to cause the failover. I was able to move them back to the Primary SQL Server last night and after that the Login errors seem to have stopped.ġ. Reason: Failed to open the explicitly specified database "dbname". The mirrored databases " " is changing roles from from Principal to Mirror because the mirroring session or availability group failed over due to role synchronization. Looking at the SQL Logs, I see the following entries for both of those databases: We recently observed that two of our databases in the SQL Instance CpsDYN and LcsCDR were moved from the Primary SQL Server to the Mirror SQL Server.
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