一数据库服务器执行shutdown immediate时，遇到了下面ORA错误，如下所示：
$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.4.0 - Production on Fri Aug 5 10:56:24 2016
Copyright (c) 1982, 2007, Oracle. All Rights Reserved.
Connected to:
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
SQL> shutdown immediate;
ORA-03113: end-of-file on communication channel
SQL> exit