Hi,

have you had any luck solving this, we are experiencing the same thing.

Thanks

Hi,

We did solve our issues with a few other OS tweaks:

• We disabled SMB2 support on the web servers (in command prompt)
• We increased IRPStackSize parameter
  

If you're still stuck, you should try those (Google will probably help you finding out more information)

We had the pb with all dnn instances on the server (multiple versions, dnn 4.9.X and 5.1.X)

We also upgraded to dnn 5 pro since then, and switched to the new web based caching provider.

As for diagnosing the pb, here are the changes we made to the end of global.asax.vb to get more information on app pool recycling conditions (By replacing  Initialize.LogEnd with an updated version):

Cheers

  Private Sub Application_End(ByVal sender As Object, ByVal e As EventArgs)

            ' stop scheduled jobs
            Initialize.StopScheduler()

            ' log APPLICATION_END event
            'Initialize.LogEnd()

            LogEndBis()
           

        End Sub


        Public Shared Sub LogEndBis()
            Try

                Dim shutdownReason As System.Web.ApplicationShutdownReason = System.Web.Hosting.HostingEnvironment.ShutdownReason
                Dim shutdownDetail As String = ""
                Select Case shutdownReason
                    Case ApplicationShutdownReason.BinDirChangeOrDirectoryRename
                        shutdownDetail = "The AppDomain shut down because of a change to the Bin folder or files contained in it."
                    Case ApplicationShutdownReason.BrowsersDirChangeOrDirectoryRename
                        shutdownDetail = "The AppDomain shut down because of a change to the App_Browsers folder or files contained in it."
                    Case ApplicationShutdownReason.ChangeInGlobalAsax
                        shutdownDetail = "The AppDomain shut down because of a change to Global.asax."
                    Case ApplicationShutdownReason.ChangeInSecurityPolicyFile
                        shutdownDetail = "The AppDomain shut down because of a change in the code access security policy file."
                    Case ApplicationShutdownReason.CodeDirChangeOrDirectoryRename
                        shutdownDetail = "The AppDomain shut down because of a change to the App_Code folder or files contained in it."
                    Case ApplicationShutdownReason.ConfigurationChange
                        shutdownDetail = "The AppDomain shut down because of a change to the application level configuration."
                    Case ApplicationShutdownReason.HostingEnvironment
                        shutdownDetail = "The AppDomain shut down because of the hosting environment."
                    Case ApplicationShutdownReason.HttpRuntimeClose
                        shutdownDetail = "The AppDomain shut down because of a call to Close."
                    Case ApplicationShutdownReason.IdleTimeout
                        shutdownDetail = "The AppDomain shut down because of the maximum allowed idle time limit."
                    Case ApplicationShutdownReason.InitializationError
                        shutdownDetail = "The AppDomain shut down because of an AppDomain initialization error."
                    Case ApplicationShutdownReason.MaxRecompilationsReached
                        shutdownDetail = "The AppDomain shut down because of the maximum number of dynamic recompiles of resources limit."
                    Case ApplicationShutdownReason.PhysicalApplicationPathChanged
                        shutdownDetail = "The AppDomain shut down because of a change to the physical path for the application."
                    Case ApplicationShutdownReason.ResourcesDirChangeOrDirectoryRename
                        shutdownDetail = "The AppDomain shut down because of a change to the App_GlobalResources folder or files contained in it."
                    Case ApplicationShutdownReason.UnloadAppDomainCalled
                        shutdownDetail = "The AppDomain shut down because of a call to UnloadAppDomain."
                    Case Else
                        shutdownDetail = "No shutdown reason provided."
                End Select


                Dim theRuntimeField As System.Reflection.FieldInfo = GetType(System.Web.HttpRuntime).GetField("_theRuntime", System.Reflection.BindingFlags.NonPublic Or System.Reflection.BindingFlags.Static)
                Dim theRuntime As Object = theRuntimeField.GetValue(Nothing)
                Dim shutDownMessageField As System.Reflection.FieldInfo = GetType(System.Web.HttpRuntime).GetField("_shutDownMessage", System.Reflection.BindingFlags.NonPublic Or System.Reflection.BindingFlags.Instance)
                Dim shutDownMessage As String = DirectCast(shutDownMessageField.GetValue(theRuntime), String)

                Dim objEv As New EventLogController
                Dim objEventLogInfo As New LogInfo
                objEventLogInfo.BypassBuffering = True
                objEventLogInfo.LogTypeKey = Services.Log.EventLog.EventLogController.EventLogType.APPLICATION_SHUTTING_DOWN.ToString
                objEventLogInfo.AddProperty("Shutdown Details", shutdownDetail)
                objEventLogInfo.AddProperty("Shutdown Message", shutDownMessage)

                objEv.AddLog(objEventLogInfo)
            Catch exc As Exception
                LogException(exc)
            End Try

            ' purge log buffer
            LoggingProvider.Instance.PurgeLogBuffer()
        End Sub