com.****.JdbcRuntimeException: jdbc框架执行发生了异常 jdbc execute failured sorry -_- with nested exception: query error [Message:] Communications link failure The last packet successfully received from the server was 5,412,074 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago. with nested exception: Communications link failure The last packet successfully received from the server was 5,412,074 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago.