Question

我有一组在 Azure网站

中运行的asp.net 4.0网站

计算模式：标准
地点：北欧
容量自动缩放：关闭
实例大小：大
实例数：1

响应时间非常慢，流量正常，但我的日志显示许多 AppDomain关闭（一分钟内超过3次）。我的网站在de Application_Start期间在缓存中加载数据，以快速响应所有子请求，但是如果每次重新启动Appdomains都无法给出可接受的响应时间。

ShutdownReason 值很多：

ConfigurationChange
HostingEnvironment
CodeDirChangeOrDirectoryRename
BinDirChangeOrDirectoryRename
BrowsersDirChangeOrDirectoryRename

这没有任何意义，因为我没有更改这些文件夹中的任何文件。

我在免费模式下测试了其中一个网站，运行速度非常快，没有任何意外的AppDomain重启。

感谢。

更新

我已将此代码包含在Application_Start中，未检测到文件更改且AppDomain再次重新启动，并再次...

var monitorPath = HostingEnvironment.MapPath("~/");
Application.Add("watcher", new FileSystemWatcher(monitorPath));
fsw = (FileSystemWatcher) Application["watcher"];
fsw.EnableRaisingEvents = true;
fsw.IncludeSubdirectories = true;
fsw.Changed += fsw_Changed;
fsw.Created += fsw_Created;
fsw.Deleted += fsw_Deleted;
fsw.Renamed += fsw_Renamed;

2013年7月15日更新：

使用ScottGu文章http://weblogs.asp.net/scottgu/archive/2005/12/14/433194.aspx

中的代码

我记录了这个：

_shutDownMessage=Directory rename change notification for 'C:\DWASFiles\Sites\my-sitename\VirtualDirectory0\site\wwwroot'.
File Change Notification Error in wwwroot
HostingEnvironment initiated shutdown
Change Notification for critical directories.
File Change Notification Error in App_GlobalResources
Change Notification for critical directories.
File Change Notification Error in bin
Change Notification for critical directories.
File Change Notification Error in App_Browsers
Change Notification for critical directories.
File Change Notification Error in App_Code
Change Notification for critical directories.
File Change Notification Error in App_WebReferences
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
CONFIG change
File Change Notification Error in C:\DWASFiles\Sites\my-sitename\VirtualDirectory0\site\wwwroot
CONFIG change
File Change Notification Error in 
HostingEnvironment caused shutdown
File Change Notification Error in 
Change Notification for critical directories.
File Change Notification Error in App_LocalResources
Change Notification for critical directories.
File Change Notification Error in App_LocalResources
CONFIG change

_shutDownStack=   at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
   at System.Environment.get_StackTrace()
   at System.Web.Hosting.HostingEnvironment.InitiateShutdownInternal()
   at System.Web.Hosting.HostingEnvironment.InitiateShutdownWithoutDemand()
   at System.Web.HttpRuntime.ShutdownAppDomain(String stackTrace)
   at System.Web.HttpRuntime.OnCriticalDirectoryChange(Object sender, FileChangeEvent e)
   at System.Web.FileChangesMonitor.OnSubdirChange(Object sender, FileChangeEvent e)
   at System.Web.DirectoryMonitor.FireNotifications()
   at System.Web.Util.WorkItem.CallCallbackWithAssert(WorkItemCallback callback)
   at System.Web.Util.WorkItem.OnQueueUserWorkItemCompletion(Object state)
   at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(Object state)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

2013年7月19日更新：

指标数据输入非常高且与请求指标无关，但是当我配置设置fcnMode =“已禁用”时，数据输入立即降至正常值符合流量。

Answer 1

在asp.net 4.5中使用新设置fcnMode（似乎在4.0中工作），AppDomain停止重启

  <httpRuntime fcnMode="Disabled" />

但是，现在的问题是为什么azure网站中的FileChangesMonitor（至少在我订阅的网站中）给出了这个_shutDownMessage：

File Change Notification Error in wwwroot
HostingEnvironment initiated shutdown
Change Notification for critical directories.
File Change Notification Error in App_GlobalResources
Change Notification for critical directories.
File Change Notification Error in bin
Change Notification for critical directories.
File Change Notification Error in App_Browsers
...

<强>更新

原因是SMB中的一个错误只影响了北欧的位置。

Azure网站AppDomain重启很多次

1 个答案: