Iis 偶尔使用Faces插件500-无法封送代理

我们正在使用ImageResizer的3.4.3版本和elite插件。看来我们遇到的任何麻烦都与Faces插件有关。图像将不会显示，在查看网络响应时，stacktrace显示“无法将代理从本机代码封送到其主域以外的域”。这里有完整的痕迹

[NotSupportedException: Delegates cannot be marshaled from native code into a domain other than their home domain.]
   System.Runtime.InteropServices.Marshal.GetDelegateForFunctionPointerInternal(IntPtr ptr, Type t) +0
   System.Runtime.InteropServices.Marshal.GetDelegateForFunctionPointer(IntPtr ptr, Type t) +267
   OpenCvSharp.CvInvoke..cctor() +328

[TypeInitializationException: The type initializer for 'OpenCvSharp.CvInvoke' threw an exception.]
   OpenCvSharp.Cv.Load(String filename, CvMemStorage memstorage, String name, String& real_name) +222
   ImageResizer.Plugins.Faces.FeatureDetectionBase`1.LoadFiles() +621
   ImageResizer.Plugins.Faces.FeatureDetectionBase`1.DetectFeatures(Bitmap b) +82
   ImageResizer.Plugins.Faces.FacesPlugin.PostPrepareSourceBitmap(ImageState s) +341
   ImageResizer.Resizing.AbstractImageProcessor.PostPrepareSourceBitmap(ImageState s) +99
   ImageResizer.ImageBuilder.Process(ImageState s) +60
   ImageResizer.ImageBuilder.buildToBitmap(Bitmap source, ResizeSettings settings, Boolean transparencySupported) +276
   ImageResizer.ImageBuilder.buildToStream(Bitmap source, Stream dest, ResizeSettings settings) +149
   ImageResizer.ImageBuilder.BuildJob(ImageJob job) +1353
   ImageResizer.ImageBuilder.Build(ImageJob job) +268
   ImageResizer.ImageBuilder.Build(Object source, Object dest, ResizeSettings settings, Boolean disposeSource, Boolean addFileExtension) +124
   ImageResizer.ImageBuilder.Build(Object source, Object dest, ResizeSettings settings, Boolean disposeSource) +36
   ImageResizer.ImageBuilder.Build(Object source, Object dest, ResizeSettings settings) +23
   ImageResizer.<>c__DisplayClass3.<HandleRequest>b__2(Stream stream) +287
   ImageResizer.Plugins.DiskCache.<>c__DisplayClasse.<TryWriteFile>b__d() +593
   ImageResizer.Plugins.DiskCache.LockProvider.TryExecute(String key, Int32 timeoutMs, LockCallback success) +424
   ImageResizer.Plugins.DiskCache.CustomDiskCache.TryWriteFile(CacheResult result, String physicalPath, String relativePath, ResizeImageDelegate writeCallback, DateTime sourceModifiedUtc, Int32 timeoutMs, Boolean recheckFS) +517
   ImageResizer.Plugins.DiskCache.CustomDiskCache.GetCachedFile(String keyBasis, String extension, ResizeImageDelegate writeCallback, DateTime sourceModifiedUtc, Int32 timeoutMs, Boolean asynchronous) +819
   ImageResizer.Plugins.DiskCache.DiskCache.Process(IResponseArgs e) +209
   ImageResizer.Plugins.DiskCache.DiskCache.Process(HttpContext context, IResponseArgs e) +47
   ImageResizer.InterceptModule.HandleRequest(HttpContext context, String virtualPath, NameValueCollection queryString, IVirtualFile vf) +1687
   ImageResizer.InterceptModule.CheckRequest_PostAuthorizeRequest(Object sender, EventArgs e) +1163
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +92
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +165

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可以找到调试页面

4.1.7有一个“挂起”错误，该错误已在4.1.9中修复-您可以再次尝试升级。DebugDiag的异常与此无关——这只是一个JSON请求。不知何故，您的应用程序每个进程都有多个应用程序域。你能检查并确保应用程序池中只有一个租户吗？我对4.1.9也有同样的问题，我必须对应用程序域进行更多的调查。我不明白我怎么可能拥有不止一个，但我承认我的.net知识库并不庞大。而且，4.2.0仍然存在这个问题。我可以试试4.2.5

In w3wp__ImageResizer__PID__5284__Date__06_14_2017__Time_08_23_10AM__122__First chance exception 0XE0434352.dmp the assembly instruction at KERNELBASE!RaiseException in C:\Windows\System32\KERNELBASE.dll from Microsoft Corporation has caused a CLR Exception on thread 28 with the following error information:
    Type:   ImageResizer.Plugins.Faces.AlternateResponseException 
    Message:   Resizing was canceled as JSON data was requested instead 
This exception originated from ImageResizer.Plugins.Faces.FacesPlugin.Render(ImageResizer.Resizing.ImageState).