But both authors wrote books on the subject without hazarding a guess at a usable definition.

但两位作者都起了这个书名又都不肯冒险给出个有用的定义。

At a guess I would suggest that a remote socket endpoint has closed and you are trying to read from it.

我猜测我建议远程套接字端点已经关闭了，你想读它。