Text类序列化似乎有bug

@Override
public void readFields(DataInput in) throws IOException {
uid = in.readLong();
fansNum = in.readInt();
followNum = in.readInt();
feedNum = in.readInt();
depth = in.readInt();
fans.readFields(in);
follow.readFields(in);
feedList.readFields(in);
//nick.readFields(in);
nick = in.readUTF();
}
@Override
public void write(DataOutput out) throws IOException {
out.writeLong(uid);
out.writeInt(fansNum);
out.writeInt(followNum);
out.writeInt(feedNum);
out.writeInt(depth);
fans.write(out);
follow.write(out);
feedList.write(out);
out.writeUTF(nick);
//nick.write(out);
}

从map传递到reduce里，发现nick里出现了乱码。把出现乱码的文字拿出来单独测试却正常。难以索解。改成String类型后bug消失。

Hadoop版本0.20.2
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