Question

我试图通过WCF服务调用将一些大数据保存到数据库。我无法调用该服务。它抛出一个错误：

无法分配268435456字节的托管内存缓冲区。可用内存量可能很低

public async Task<int> UploadExportPackage(DTO.Upload.UploadPackage package)
{
    int result = await serviceProxy.UploadResultsAsync(package);
    return result;
}

服务器端配置：

    <!-- 
      Place limits on the amount of data that can be received in one go.
      This helps to protect the server from attack and abuse.
    -->
    <binding name="primaryBinding"
             maxReceivedMessageSize="6000000"
             maxBufferSize="6000000"
             maxBufferPoolSize="12000000">

      <readerQuotas maxArrayLength="6000000"
                    maxStringContentLength="6000000" />

      <!--
          Set the security mode. Apply at:
            - Transport layer
            - Message layer
      -->
      <security mode="TransportWithMessageCredential">
        <message clientCredentialType="UserName" />
      </security>
    </binding>
  </basicHttpsBinding>
</bindings>

堆栈追踪：

Exception no: 0

下一个例外：消息：

无法分配268435456字节的托管内存缓冲区。可用内存量可能很低。

堆栈跟踪：服务器堆栈跟踪：在System.Runtime.Fx.AllocateByteArray（Int32大小）在System.Runtime.InternalBufferManager.PooledBufferManager.TakeBuffer（Int32 bufferSize）在System.ServiceModel.Channels.BufferManagerOutputStream.Init（Int32 initialSize，Int32 maxSizeQuota，Int32 effectiveMaxSize，BufferManager bufferManager）在System.ServiceModel.Channels.BufferedMessageWriter.WriteMessage（消息消息，BufferManager bufferManager，Int32 initialOffset，Int32 maxSizeQuota） at System.ServiceModel.Channels.TextMessageEncoderFactory.TextMessageEncoder.WriteMessage（消息消息，Int32 maxMessageSize，BufferManager bufferManager，Int32 messageOffset）在System.ServiceModel.Channels.HttpOutput.SerializeBufferedMessage（消息消息，布尔值shouldRecycleBuffer）在System.ServiceModel.Channels.HttpOutput.SendAsyncResult.SendWithoutChannelBindingToken（）在System.ServiceModel.Channels.HttpOutput.SendAsyncResult.Send（）在System.ServiceModel.Channels.HttpOutput.SendAsyncResult..ctor（HttpOutput httpOutput，HttpResponseMessage httpResponseMessage，Boolean suppressEntityBody，TimeSpan timeout，AsyncCallback callback，Object state）在System.ServiceModel.Channels.HttpOutput.BeginSendCore（HttpResponseMessage httpResponseMessage，TimeSpan超时，AsyncCallback回调，对象状态）在System.ServiceModel.Channels.HttpChannelFactory 1.HttpRequestChannel.HttpChannelAsyncRequest.SendWebRequest() at System.ServiceModel.Channels.HttpChannelFactory 1.HttpRequestChannel.HttpChannelAsyncRequest.BeginSendRequest（消息消息，TimeSpan超时）在System.ServiceModel.Channels.RequestChannel.BeginRequest（消息消息，TimeSpan超时，AsyncCallback回调，对象状态）在System.ServiceModel.Channels.SecurityChannelFactory 1.RequestChannelSendAsyncResult.BeginSendCore(IRequestChannel channel, Message message, TimeSpan timeout, AsyncCallback callback, Object state) at System.ServiceModel.Security.ApplySecurityAndSendAsyncResult 1.OnSecureOutgoingMessageComplete（消息消息）在System.ServiceModel.Security.ApplySecurityAndSendAsyncResult 1.Begin(Message message, SecurityProtocolCorrelationState correlationState) at System.ServiceModel.Channels.SecurityChannelFactory 1.SecurityRequestChannel.BeginRequest（消息消息，TimeSpan超时，AsyncCallback回调，对象状态）在System.ServiceModel.Dispatcher.RequestChannelBinder.BeginRequest（消息消息，TimeSpan超时，AsyncCallback回调，对象状态）在System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.StartSend（Boolean completedSynchronously）在System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.FinishEnsureOpen（IAsyncResult result，Boolean completedSynchronously）在System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.StartEnsureOpen（Boolean completedSynchronously）在System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.FinishEnsureInteractiveInit（IAsyncResult result，Boolean completedSynchronously）在System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.StartEnsureInteractiveInit（）在System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.Begin（） at System.ServiceModel.Channels.ServiceChannel.BeginCall（String action，Boolean oneway，ProxyOperationRuntime operation，Object [] ins，TimeSpan timeout，AsyncCallback callback，Object asyncState）在System.ServiceModel.Channels.ServiceChannel.BeginCall（ServiceChannel通道，ProxyOperationRuntime操作，Object [] ins，AsyncCallback回调，Object asyncState） at System.Threading.Tasks.TaskFactory 1.FromAsyncImpl[TArg1,TArg2,TArg3](Func 6 beginMethod，Func 2 endFunction, Action 1 endAction，TArg1 arg1，TArg2 arg2，TArg3 arg3，Object state，TaskCreationOptions creationOptions）在System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.CreateGenericTask [T]（ServiceChannel频道，ProxyOperationRuntime操作，Object [] inputParameters）在System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.CreateGenericTask（ServiceChannel频道，ProxyOperationRuntime操作，Object [] inputParameters）在System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.CreateTask（ServiceChannel频道，IMethodCallMessage methodCall，ProxyOperationRuntime操作）在System.ServiceModel.Channels.ServiceChannelProxy.InvokeTaskService（IMethodCallMessage methodCall，ProxyOperationRuntime操作）在System.ServiceModel.Channels.ServiceChannelProxy.Invoke（IMessage message）

在[0]处重新抛出异常：在System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage（IMessage reqMsg，IMessage retMsg）在System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke（MessageData＆amp; msgData，Int32 type）在RossendaleClient8.DAL.RR.IRossendaleService.UploadResultsAsync（UploadPackage包）在RossendaleClient8.DAL.RR.RossendaleServiceClient.UploadResultsAsync（UploadPackage包）在RossendaleClient8.DAL.RossendaleServiceClient.d__13.MoveNext（）

下一个例外：消息：

类型的异常＆＃39; System.OutOfMemoryException＆＃39;被扔了。

堆栈跟踪：在System.Runtime.Fx.AllocateByteArray（Int32 size）

Answer 1

如果您的绑定允许，请尝试使用。您还可以查看TransferMode.Streamed。来自MSDN：

缓冲传输将整个消息保存在内存缓冲区中，直到传输完成。

流式传输仅缓冲邮件头并将邮件正文作为流公开，较小的部分可以从中流   一次阅读。

默认的TransferMode是Buffered，因此整个消息被加载到内存中。如果打开Streamed TransferMode，则可以通过编辑MaxBufferSize的值来管理内存使用的大小。

BinaryMessageEncoding反过来允许您压缩数据，通过网络发送。以下是App.Config内容的示例

 <customBinding>
    <binding name="primaryBinding" openTimeout="00:01:00"  closeTimeout="00:01:00" 
              sendTimeout="00:30:00" receiveTimeout="00:30:00">
      <binaryMessageEncoding compressionFormat="GZip">
        <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"
                      maxArrayLength="2147483647" maxBytesPerRead="2147483647"
                      maxNameTableCharCount="2147483647" />
      </binaryMessageEncoding>
      <httpsTransport transferMode="Streamed" maxReceivedMessageSize="6000000" 
                      maxBufferSize="6000000" maxBufferPoolSize="12000000" />          
    </binding>      
  </customBinding>

代码中的相同配置

 private Binding GetBinding()
    {
        var config = new BindingElementCollection();            
        config.Add(new BinaryMessageEncodingBindingElement()
        {
            CompressionFormat = CompressionFormat.GZip,
        });
        config.Add(new HttpsTransportBindingElement()
        {
            MaxBufferPoolSize = 12000000,
            MaxBufferSize = 6000000,
            MaxReceivedMessageSize = 6000000,
            TransferMode = TransferMode.Streamed,
        });

        var resultBinding = new CustomBinding(config)
        {
            OpenTimeout = TimeSpan.FromMinutes(1),
            CloseTimeout = TimeSpan.FromMinutes(1),
            ReceiveTimeout = TimeSpan.FromMinutes(1),
            SendTimeout = TimeSpan.FromMinutes(1),
        };

        return resultBinding;
    }

Answer 2

我从未尝试使用WCF发送超过50MB的内容，但我非常确定256MB +文件很容易导致上述问题，我建议您尝试以下方法：

将文件剥离为较小的小块，例如每个文件50 MB
在尝试发送文件时检查服务的内存分配，是否超出了计算机上可用内存的最大值？

Answer 3

如前所述，我已将TransferMode更改为“Streamed”，但我也增加了最大缓冲区大小。将超时和maxAllowedContent增加到300mb，以允许上载更大的文件。现在效果很好。

Answer 4

我知道它可能不适合所有人，但是......

我们最近遇到了类似的问题。在本地调试一些代码时，只有一个开发人员遇到了问题。原来他没有使用 64位版本的 IIS Express 。

Answer 5

另见OutOfMemoryException while populating MemoryStream: 256MB allocation on 16GB system：请求的内存逐步加倍，有些内存不能分配额外的内存 - 当你得到异常时就是这样。

无法分配268435456字节的托管内存缓冲区。可用内存量可能很低

5 个答案: