数据库每隔几个小时就会有“恢复待定”状态

Question

我最近注意到我的SQL Server上的大多数数据库在运行几个小时后（有时是6个，有时甚至更多）都会获得Recovery Pending状态。我无法想象这是预期的结果，所以我决定在这里发布它。

我打开了事件日志查看器，并决定查找有关正在发生的事情的更多信息。似乎我的所有数据库每隔几分钟就会“启动”一次（如可以看到here）。其中一些连续多次启动。这应该是那样的吗？

滚动了一下之后，我从我的一个IIS网站找到了this warning：

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 4/11/2018 9:32:05 AM 
Event time (UTC): 4/11/2018 7:32:05 AM 
Event ID: 7911bb726cd34d36941e8232ad78b059 
Event sequence: 18 
Event occurrence: 3 
Event detail code: 0 

Application information: 
    Application domain: /LM/W3SVC/5/ROOT-1-131679051910980983 
    Trust level: Full 
    Application Virtual Path: / 
    Application Path: C:inetpubx 
    Machine name: WIN-IV6CMBTUQ4N 

Process information: 
    Process ID: 2400 
    Process name: w3wp.exe 
    Account name: IIS APPPOOLx

Exception information: 
    Exception type: HttpException 
    Exception message: The remote host closed the connection. The error code is 0x80070057.
at System.Web.Hosting.IIS7WorkerRequest.RaiseCommunicationError(Int32 result, Boolean throwOnDisconnect)
at System.Web.Hosting.IIS7WorkerRequest.ExplicitFlush()
at System.Web.HttpResponse.Flush(Boolean finalFlush, Boolean async)
at System.Web.HttpWriter.WriteFromStream(Byte[] data, Int32 offset, Int32 size)
at Microsoft.Owin.Host.SystemWeb.CallStreams.OutputStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at Microsoft.AspNet.SignalR.Owin.ServerResponse.Write(ArraySegment`1 data)
at Microsoft.AspNet.SignalR.Hosting.ResponseExtensions.End(IResponse response, String data)
at Microsoft.AspNet.SignalR.TaskAsyncHelper.TaskRunners`2.<>c__DisplayClass2_0.<RunTask>b__0(Task t)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Owin.Mapping.MapMiddleware.<Invoke>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar)
at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)



Request information: 
    Request URL: http://91.134.116.40:8003/signalr/start?clientProtocol=1.4&transport=webSockets&connectionData=[{"Name":"ChatHub"}]&connectionToken=/y39a+1XOv/u7X/ZFYw5ACLQu58FVNl0hbkMwPHCw1EQ9gdCbpFxPQzPuJVDxRywoP2AaI6akuXxQIxM2Wwa0OLO4cWd/e3csUBetjb9nROsisQnavw52ulTHWVOjK/j&user=User-14D 
    Request path: /signalr/start 
    User host address: 24.13.101.142 
    User:  
    Is authenticated: False 
    Authentication Type:  
    Thread account name: IIS APPPOOLx

Thread information: 
    Thread ID: 14 
    Thread account name: IIS APPPOOLx
    Is impersonating: False 
    Stack trace:    at System.Web.Hosting.IIS7WorkerRequest.RaiseCommunicationError(Int32 result, Boolean throwOnDisconnect)
at System.Web.Hosting.IIS7WorkerRequest.ExplicitFlush()
at System.Web.HttpResponse.Flush(Boolean finalFlush, Boolean async)
at System.Web.HttpWriter.WriteFromStream(Byte[] data, Int32 offset, Int32 size)
at Microsoft.Owin.Host.SystemWeb.CallStreams.OutputStream.Write(Byte[] buffer, Int32 offset, Int32 count)
at Microsoft.AspNet.SignalR.Owin.ServerResponse.Write(ArraySegment`1 data)
at Microsoft.AspNet.SignalR.Hosting.ResponseExtensions.End(IResponse response, String data)
at Microsoft.AspNet.SignalR.TaskAsyncHelper.TaskRunners`2.<>c__DisplayClass2_0.<RunTask>b__0(Task t)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.Owin.Mapping.MapMiddleware.<Invoke>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult ar)
at System.Web.HttpApplication.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)


Custom event details:

似乎SignalR有问题，所以它不应该与数据库有任何直接关系，但那里没有任何其他错误/警告。

我在这里错过了什么吗？

谢谢！