Some websites belonging to a particular webserver running on

• Microsoft Windows NT 6.3.9600.0
• Microsoft-IIS/8.5
• .NET Framework Version: 4.0.30319.42000

are frequently shutting down at unexpected moments. Could be 3-4 times or more within a week.

After the application pool has shut down this way it cannot connect to the SQL database on restart.

The error message from the logfile just before the application pool is shutting down is:

"
2017-09-29 09:06:26,963 [Server-Name][Thread:1][INFO] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - Application Starting (00:00:00.0000419)

2017-09-29 09:06:27,135 [Server-Name][Thread:1][INFO] DotNetNuke.Web.Common.Internal.DotNetNukeHttpApplication - Application Started (00:00:00.1848061)

2017-09-29 09:06:27,151 [Server-Name][Thread:1][INFO] DotNetNuke.Web.Common.Internal.DotNetNukeShutdownOverload - FCNMode = 2 (Modes: NotSet/Default=0, Disabled=1, Single=2)

2017-09-29 09:06:27,151 [Server-Name][Thread:1][TRACE] DotNetNuke.Web.Common.Internal.DotNetNukeShutdownOverload - DirMonCompletion count: 4

2017-09-29 09:06:27,151 [Server-Name][Thread:1][TRACE] DotNetNuke.Web.Common.Internal.DotNetNukeShutdownOverload - Added watcher for: D:\ftp_websteder\dnnDiverse\*.*

"

I understand that the recommended FCNMode setting is "Single". But I will see if setting it to "Disabled" will have any effect.

The sites had been running in DNN 7 without these frequent shutdown errors.