如何解决区域清除后，具有适当速度的NHibernate崩溃
| 我正在将NHibernate和Velocity用作第二级缓存级别提供程序。 我需要清除一个区域。我正在使用以下代码：_sessionFactory.EvictQueries(\"Authorization\");
var authCache = _sessionFactory.GetSecondLevelCacheRegion(\"Authorization\");
authCache.Clear();
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,MDHObjectNode& newObjectNode,MDHOperationInfo& operationInfo)
at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.PutNodeInSlot(MDHOperationInfo& operationInfo,MDHDirectoryNode dir,Int32 slotIndex)
at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.TryOperation(MDHOperationInfo& operationInfo)
at Microsoft.ApplicationServer.Caching.MultiDirectoryHashtable.PerformOperation(MDHOperationInfo& 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,Object opState)
at Microsoft.ApplicationServer.Caching.ObjectManager.GetAndLock(String cacheName,String regionName,Object key,DataCacheLockHandle& lHandle,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,NativeOverlapped* pOVERLAP)}. Check debug log for more information
解决方法
这是一个已知的AF缓存错误。缓存项锁定时，“区域清除”会导致崩溃。看到这个线程：
清除系统区域时发生异常
解决方法是：不是清除而是应该在随附的AF Cache PS控制台中重新启动群集。
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