The JDBC driver indicates the loss of a connection with a specialerror code.
JDBC 驱动程序用一个特殊的错误码表示连接的丢失。
2
A specialerror handler in the client receives this exception and must parse the parser's error message to retrieve the required information!
客户中一个专门的错误处理程序接收这种异常，并且必须在解析器错误消息中检索出需要的信息！
3
If a user is not authenticated when trying to access this resource, the user will receive a 401 status code and the application can provide a specialerror handler to deal with that condition.