Hi! Been running a site for 4+ years on NHibernate. We recently moved the site to a Windows Server 2012 machine and updated NHibernate to 3.3. After about a month on the new server we began to see the following exceptions
NHibernate.HibernateException: Creating a proxy instance failed ---> System.Runtime.InteropServices.COMException: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(RuntimeAssembly containingAssembly, Boolean emitSymbolInfo, String name, String filename, StackCrawlMarkHandle stackMark, IntPtr& pInternalSymWriter, ObjectHandleOnStack retModule, Boolean fIsTransient, Int32& tkFile) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModuleInternalNoLock(String name, String fileName, Boolean emitSymbolInfo, StackCrawlMark& stackMark) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModuleInternal(String name, String fileName, Boolean emitSymbolInfo, StackCrawlMark& stackMark) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(String name, String fileName, Boolean emitSymbolInfo) A restart of the application pool solves the problem for a while. It happens about once a week, it affects different entities everytime, and other parts of the site (that also uses NHibernate) continues to work. Full stacktrace below: NHibernate.HibernateException: Creating a proxy instance failed ---> System.Runtime.InteropServices.COMException: Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(RuntimeAssembly containingAssembly, Boolean emitSymbolInfo, String name, String filename, StackCrawlMarkHandle stackMark, IntPtr& pInternalSymWriter, ObjectHandleOnStack retModule, Boolean fIsTransient, Int32& tkFile) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModuleInternalNoLock(String name, String fileName, Boolean emitSymbolInfo, StackCrawlMark& stackMark) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModuleInternal(String name, String fileName, Boolean emitSymbolInfo, StackCrawlMark& stackMark) at System.Reflection.Emit.AssemblyBuilder.DefineDynamicModule(String name, String fileName, Boolean emitSymbolInfo) at NHibernate.Proxy.DynamicProxy.DefaultProxyAssemblyBuilder.DefineDynamicModule(AssemblyBuilder assemblyBuilder, String moduleName) at NHibernate.Proxy.DynamicProxy.ProxyFactory.CreateUncachedProxyType(Type baseType, Type[] baseInterfaces) at NHibernate.Proxy.DynamicProxy.ProxyFactory.CreateProxyType(Type baseType, Type[] interfaces) at NHibernate.Proxy.DynamicProxy.ProxyFactory.CreateProxy(Type instanceType, IInterceptor interceptor, Type[] baseInterfaces) at NHibernate.Proxy.DefaultProxyFactory.GetProxy(Object id, ISessionImplementor session) --- End of inner exception stack trace --- at NHibernate.Proxy.DefaultProxyFactory.GetProxy(Object id, ISessionImplementor session) at NHibernate.Tuple.Entity.AbstractEntityTuplizer.CreateProxy(Object id, ISessionImplementor session) at NHibernate.Persister.Entity.AbstractEntityPersister.CreateProxy(Object id, ISessionImplementor session) at NHibernate.Event.Default.DefaultLoadEventListener.CreateProxyIfNecessary(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options, IPersistenceContext persistenceContext) at NHibernate.Event.Default.DefaultLoadEventListener.ProxyOrLoad(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options) at NHibernate.Event.Default.DefaultLoadEventListener.OnLoad(LoadEvent event, LoadType loadType) at NHibernate.Impl.SessionImpl.FireLoad(LoadEvent event, LoadType loadType) at NHibernate.Impl.SessionImpl.InternalLoad(String entityName, Object id, Boolean eager, Boolean isNullable) at NHibernate.Type.EntityType.ResolveIdentifier(Object id, ISessionImplementor session) at NHibernate.Type.EntityType.ResolveIdentifier(Object value, ISessionImplementor session, Object owner) at NHibernate.Engine.TwoPhaseLoad.InitializeEntity(Object entity, Boolean readOnly, ISessionImplementor session, PreLoadEvent preLoadEvent, PostLoadEvent postLoadEvent) at NHibernate.Loader.Loader.InitializeEntitiesAndCollections(IList hydratedObjects, Object resultSetId, ISessionImplementor session, Boolean readOnly) at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) at NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) at NHibernate.Loader.Loader.LoadCollection(ISessionImplementor session, Object id, IType type) at NHibernate.Loader.Collection.CollectionLoader.Initialize(Object id, ISessionImplementor session) at NHibernate.Persister.Collection.AbstractCollectionPersister.Initialize(Object key, ISessionImplementor session) at NHibernate.Event.Default.DefaultInitializeCollectionEventListener.OnInitializeCollection(InitializeCollectionEvent event) at NHibernate.Impl.SessionImpl.InitializeCollection(IPersistentCollection collection, Boolean writing) at NHibernate.Collection.AbstractPersistentCollection.Initialize(Boolean writing) at NHibernate.Collection.AbstractPersistentCollection.Read() at NHibernate.Collection.Generic.PersistentGenericBag`1.System.Collections.Generic.IEnumerable.GetEnumerator() at XXX.YYY.Services.FluentMdx.Queries.PrioMatrixQuery.SetupDimensionCollector(IDimensionCollector dimensionCollector) at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.b__12() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) at NHibernate.Proxy.DefaultProxyFactory.GetProxy(Object id, ISessionImplementor session) at NHibernate.Tuple.Entity.AbstractEntityTuplizer.CreateProxy(Object id, ISessionImplementor session) at NHibernate.Persister.Entity.AbstractEntityPersister.CreateProxy(Object id, ISessionImplementor session) at NHibernate.Event.Default.DefaultLoadEventListener.CreateProxyIfNecessary(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options, IPersistenceContext persistenceContext) at NHibernate.Event.Default.DefaultLoadEventListener.ProxyOrLoad(LoadEvent event, IEntityPersister persister, EntityKey keyToLoad, LoadType options) at NHibernate.Event.Default.DefaultLoadEventListener.OnLoad(LoadEvent event, LoadType loadType) at NHibernate.Impl.SessionImpl.FireLoad(LoadEvent event, LoadType loadType) at NHibernate.Impl.SessionImpl.InternalLoad(String entityName, Object id, Boolean eager, Boolean isNullable) at NHibernate.Type.EntityType.ResolveIdentifier(Object id, ISessionImplementor session) at NHibernate.Type.EntityType.ResolveIdentifier(Object value, ISessionImplementor session, Object owner) at NHibernate.Engine.TwoPhaseLoad.InitializeEntity(Object entity, Boolean readOnly, ISessionImplementor session, PreLoadEvent preLoadEvent, PostLoadEvent postLoadEvent) at NHibernate.Loader.Loader.InitializeEntitiesAndCollections(IList hydratedObjects, Object resultSetId, ISessionImplementor session, Boolean readOnly) at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) at NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies) at NHibernate.Loader.Loader.LoadCollection(ISessionImplementor session, Object id, IType type) at NHibernate.Loader.Collection.CollectionLoader.Initialize(Object id, ISessionImplementor session) at NHibernate.Persister.Collection.AbstractCollectionPersister.Initialize(Object key, ISessionImplementor session) at NHibernate.Event.Default.DefaultInitializeCollectionEventListener.OnInitializeCollection(InitializeCollectionEvent event) at NHibernate.Impl.SessionImpl.InitializeCollection(IPersistentCollection collection, Boolean writing) at NHibernate.Collection.AbstractPersistentCollection.Initialize(Boolean writing) at NHibernate.Collection.AbstractPersistentCollection.Read() at NHibernate.Collection.Generic.PersistentGenericBag`1.System.Collections.Generic.IEnumerable.GetEnumerator() at XXX.YYY.Services.FluentMdx.Queries.PrioMatrixQuery.SetupDimensionCollector(IDimensionCollector dimensionCollector) at XXX.YYY.Services.FluentMdx.Queries.QueryBuilder.b__1(IDimensionCollector x) at XXX.YYY.Services.FluentMdx.Queries.QueryBuilder.BuildQuery(IFluentMdxFilterCommand mdxFilterQueryCommand) at XXX.YYY.Services.FluentMdx.FluentMdxRepository.ExecuteQuery(IMdxQueryBuilder mdxQueryBuilder) at XXX.YYY.Services.Result.PrioMatrixRenderService.GetChartEngine(IReadOnlyQuerySettings querySettings, ChartSettingsModel settingsModel) at XXX.YYY.MVC.Controllers.PrioMatrixRenderController.RenderChart(QuerySettings queryable, ChartSettingsModel chartSettings) at lambda_method(Closure , ControllerBase , Object[] ) at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.b__12() at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) at System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) -- You received this message because you are subscribed to the Google Groups "nhusers" group. 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