Я использую NHibernate с Velocity в качестве поставщика кэша второго уровня.

Мне нужно очистить регион. Я использую этот код:

 _sessionFactory.EvictQueries("Authorization");
var authCache = _sessionFactory.GetSecondLevelCacheRegion("Authorization");
authCache.Clear();
  

authCache.Clear() на самом деле вызывает NHibernate.Кэширует.Скорость.VelocityClient.Метод кэширования.

Регион очищен правильно. Но сразу после этого открывается новый сеанс и выполняется запрос к объекту, который ранее был кэширован. Он пытается GetAndLock в VelocityClient. Взрыв. Сбой AppFabricCachingService (см. Журнал событий ниже)

Правильно ли я очищаю кэш? В чем моя ошибка?

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ЖУРНАЛ СОБЫТИЙ

 AppFabric Caching service crashed with exception {System.Runtime.CallbackException: Async Callback threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.GetPlaceHolderObject(Object key)
   at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.PreProcess(MDHObjectNode oldObjectNode, MDHObjectNodeamp; newObjectNode, MDHOperationInfoamp; operationInfo)
   at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.PutNodeInSlot(MDHOperationInfoamp; operationInfo, MDHDirectoryNode dir, Int32 slotIndex)
   at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.TryOperation(MDHOperationInfoamp; operationInfo)
   at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.PerformOperation(MDHOperationInfoamp; operationInfo)
   at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.GetAndLock(Object key, TimeSpan lockTimeOut, Boolean lockKey, DMOperationCallBack preOperation, DMOperationCallBack postOperation, Object opState)
   at Microsoft.ApplicationServer.Caching.DMHashContainer.GetAndLock(Object key, TimeSpan lockTimeOut, Boolean lockKey, Object opState)
   at Microsoft.ApplicationServer.Caching.ObjectManager.GetAndLock(String cacheName, String regionName, Object key, TimeSpan lockTimeOut, DataCacheLockHandleamp; lHandle, Boolean lockKey, Object opState)
   at Microsoft.ApplicationServer.Caching.VelocityDataStore.ProcessWriteRequest(RequestBody request)
   at Microsoft.ApplicationServer.Caching.VelocityDataStore.ProcessMessageRequest(RequestBody request)
   at Microsoft.ApplicationServer.Caching.DistributedObjectManager.OnReceiveMessageFromRemoteDRM(IReplyContext replyContext)
   at Microsoft.ApplicationServer.Caching.WcfTransportChannel.InvokeCallback(Message message, IChannelContainer container)
   at Microsoft.ApplicationServer.Caching.WcfServerChannel.InvokeCallback(Message message, IChannelContainer container)
   at Microsoft.ApplicationServer.Caching.WcfServerChannel.CompleteProcessing(IAsyncResult result)
   at Microsoft.ApplicationServer.Caching.WcfTransportChannel.Receive(IAsyncResult result)
   at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
   --- End of inner exception stack trace ---
   at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
   at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
   at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.OnReceiveComplete(Object state)
   at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
   at System.ServiceModel.Channels.StreamConnection.OnRead(IAsyncResult result)
   at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
   at System.Net.LazyAsyncResult.Complete(IntPtr userToken)
   at System.Net.LazyAsyncResult.ProtectedInvokeCallback(Object result, IntPtr userToken)
   at System.Net.Security.NegotiateStream.ProcessFrameBody(Int32 readBytes, Byte[] buffer, Int32 offset, Int32 count, AsyncProtocolRequest asyncRequest)
   at System.Net.Security.NegotiateStream.ReadCallback(AsyncProtocolRequest asyncRequest)
   at System.Net.AsyncProtocolRequest.CompleteRequest(Int32 result)
   at System.Net.FixedSizeReader.CheckCompletionBeforeNextRead(Int32 bytes)
   at System.Net.FixedSizeReader.ReadCallback(IAsyncResult transportResult)
   at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
   at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously, Exception exception)
   at System.ServiceModel.Channels.ConnectionStream.ReadAsyncResult.OnAsyncReadComplete(Object state)
   at System.ServiceModel.Channels.SocketConnection.FinishRead()
   at System.ServiceModel.Channels.SocketConnection.AsyncReadCallback(Boolean haveResult, Int32 error, Int32 bytesRead)
   at System.ServiceModel.Channels.OverlappedContext.CompleteCallback(UInt32 error, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
   at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
   at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)}. Check debug log for more information
  

Это известная ошибка кэша. Очистка региона приводит к сбою при наличии заблокированных элементов кэша. Смотрите этот поток:

Исключение при очистке системных регионов

Обходной путь таков: вместо очистки вам следует выполнить перезапуск кластера в включенной консоли AF Cache PS.