异常:子消息读取不正确

在c#中使用protobuf-net对一个大文件(20GB)进行反序列化时，我得到一个"Sub-message not read correctly" Exception。读取20gb的2gb后出现异常。相同的数据结构适用于较小的实例。

20mb数据的序列化工作正常

下面是一些序列化示例代码:

            if (File.Exists(filename))
                File.Delete(filename);
            using (FileStream stream = new FileStream(filename, FileMode.Create))
            {
                Serializer.Serialize<HubLabelingData>(stream, data);
                stream.Close();
            }

下面是一些反序列化的示例代码:

            using (FileStream stream = new FileStream(filename, FileMode.Open))
            {
                data = Serializer.Deserialize<HubLabelingData>(stream);
                stream.Close();
            }

以下是数据结构(适用于小实例):

[ProtoContract]
public class HubLabelingData
{
    [ProtoMember(1)]
    public HL[] hlf;
    [ProtoMember(2)]
    public HL[] hlb;
    [ProtoMember(3)]
    public NG g;
    [ProtoMember(4)]
    public List<PL> plf;
    [ProtoMember(5)]
    public List<PL> plb;
    [ProtoMember(6)]
    public PHL[] pihlf;
    [ProtoMember(7)]
    public PHL[] pihlb;
}
[ProtoContract]
public class HL
{
    [ProtoMember(1)]
    public int[] l;
    [ProtoMember(2)]
    public double[] d;
}
[ProtoContract]
public class PL
{
    [ProtoMember(1)]
    public Dictionary<int, List<GP>> p;
}
[ProtoContract]
public class PHL
{
    [ProtoMember(1)]
    public short[] l;
}
[ProtoContract]
public class NG
{
    [ProtoMember(1)]
    public NA[] e;
    [ProtoMember(2)]
    public NA[] tne { get; set; }
    [ProtoMember(3)]
    public float[] a;
    [ProtoMember(4)]
    public float[] o;
    [ProtoMember(5)]
    public int num = 0;
}
[ProtoContract]
public class NA
{
    [ProtoMember(1)]
    public int one { get; set; }
    [ProtoMember(2)]
    public int two { get; set; }
    [ProtoMember(3)]
    public double tree { get; set; }
    [ProtoMember(4)]
    public int four { get; set; }
}
[ProtoContract]
public class NN
{
    [ProtoMember(1)]
    public List<NA> nas;
}
[ProtoContract]
public class GP
{
    [ProtoMember(1)]
    public float one { get; set; }
    [ProtoMember(2)]
    public float two { get; set; }
}