发布到生产服务器后，我们会在重新启动应用程序后不时收到此错误。要修复它，我们的管理员正在重新启动应用程序并再次运行。我们不知道发生了什么。我可以检查什么？
编辑：在同一个应用程序中，我们有asmx webservices，需要标识impersonate = true，因此在web.config中设置。
编辑2：我需要纠正我说的话。应用程序池回收后，我们收到此错误。但并非总是如此。
Error in : http://SERVER_NAME/APP_NAME/OurService.svc LastError: System.IO.FileLoadException: Could not load file or assembly 'System.IdentityModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE)) File name: 'System.IdentityModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' ---> System.Runtime.InteropServices.COMException (0x80070006): The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE)) at System.ServiceModel.Activation.HostedImpersonationContext..ctor() at System.ServiceModel.Activation.HostedHttpRequestAsyncResult..ctor(HttpApplication context, Boolean flowContext, AsyncCallback callback, Object state) at System.ServiceModel.Activation.HostedHttpRequestAsyncResult.ExecuteSynchronous(HttpApplication context, Boolean flowContext) at System.ServiceModel.Activation.HttpModule.ProcessRequest(Object sender, EventArgs e) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Message: Could not load file or assembly 'System.IdentityModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalid. (Exception from HRESULT: 0x80070006 (E_HANDLE)) Source: System.ServiceModel