今天对测试库发出shutdown immediate命令后观察日志发现如下内容：
Tue May 12 09:52:45 2015
SHUTDOWN: Active processes prevent shutdown operation
shutdown被活动的进程阻止了，Ctrl+C无法中断当前回话，退出重连服务器，打开新的会话：
[Oracle@021Y-SH-BKAP ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Tue May 12 09:54:17 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected.
SQL> shutdown immediate
ORA-24324: service handle not initialized
ORA-24323: value not allowed
ORA-01089: immediate shutdown in progress - no operations are permitted
SQL> startup abort
ORA-01031: insufficient privileges
查看报错信息
[oracle@021Y-SH-BKAP ~]$ oerr ora 01089
01089, 00000, "immediate shutdown in progress - no operations are permitted"
// *Cause: The SHUTDOWN IMMEDIATE command was used to shut down
// a running ORACLE instance, so your operations have been
// terminated.
// *Action: Wait for the instance to be restarted, or contact your DBA.
退出会话再次重新连接
SQL> exit
Disconnected
[oracle@021Y-SH-BKAP ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Tue May 12 09:57:24 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected.
SQL> shutdown abort
ORACLE instance shut down.
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