Question

我在VB.Net（v2.0框架）中有一个程序，在从sql数据读取器执行http发布时，我在几台机器上收到以下错误：

System.NotSupportedException: The stream does not support concurrent IO read or write operations.
   at System.Net.ConnectStream.InternalWrite(Boolean async, Byte[] buffer, Int32 offset, Int32 size, AsyncCallback callback, Object state)
   at System.Net.ConnectStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   at ProtoBuf.ProtoWriter.Flush(ProtoWriter writer)
   at ProtoBuf.ProtoWriter.Dispose()
   at ProtoBuf.ProtoWriter.System.IDisposable.Dispose()
   at ProtoBuf.Meta.TypeModel.SerializeWithLengthPrefix(Stream dest, Object value, Type type, PrefixStyle style, Int32 fieldNumber, SerializationContext context)
   at ProtoBuf.Serializer.SerializeWithLengthPrefix[T](Stream destination, T instance, PrefixStyle style, Int32 fieldNumber)
   at ProtoBuf.Serializer.SerializeWithLengthPrefix[T](Stream destination, T instance, PrefixStyle style)

代码：

    postStream = request.GetRequestStream()
        While dr.Read()
           dd.Add(dr) ' Adding data row to proto
           ProtoBuf.Serializer.SerializeWithLengthPrefix(Of DataDump)(postStream, dd, ProtoBuf.PrefixStyle.Base128) ' stream proto to http post stream
           dd.Clear() ' Clear proto 
        End While
 response = DirectCast(request.GetResponse(), HttpWebResponse)

Answer 1

Protobuf-net 不会发出并发读取或写入操作。由于您提到请求流，我希望实际问题与this question相关。

Answer 2

最后，它根本不是与protbuf-net相关的问题。即使在二进制文件中保存protos然后尝试上传之后，它也会抛出错误。它可能是httpwebrequest，.net或windows补丁或sophos杀毒软件。我正在关闭这个问题，因为它已经在不同的切线。谢谢你的帮助。

Protobuf-net - 流不支持并发IO读取或写入操作

2 个答案: