cannot mount database in EXCLUSIVE mode

1.故障发现

Oracle 启动后发现其他帐户都无法登陆，报告错误如下：

ERROR:

ORA-01034: ORACLE not available

ORA-27101: shared memory realm does not exist

Linux Error: 2: No such file or directory

登录服务器

Sqlplus /nolog

Connect / as sysdba

Startup

出现故障如下：

SQL> startup

ORACLE instance started.

Total System Global Area 1224736768 bytes

Fixed Size 778876 bytes

Variable Size 652483972 bytes

Database Buffers 570425344 bytes

Redo Buffers 1048576 bytes

ORA-01102: cannot mount database in EXCLUSIVE mode

大意是 “Oracle被异常关闭时，有资源没有被释放……”

检查警告日志，也证实了这一点，系统异常

解决：

察看报警日至文件：错误如下：

LTER DATABASE MOUNT

Mon Apr 12 13:57:29 2010

scumnt: failed to lock /data/oracle/product/10.1.0/db_1/dbs/lkMUSICDB1 exclusive

Mon Apr 12 13:57:29 2010

ORA-09968: scumnt: unable to lock file

Linux Error: 11: Resource temporarily unavailable

Additional information: 1728

Mon Apr 12 13:57:29 2010

ORA-1102 signalled during: ALTER DATABASE MOUNT...

2。解决方法

察看此目录

Cd $ORACLE_HOME/dbs

发现此目录下有 lk(SID) 文件存在

/sbin/fuser -u lkMUSICDB1

lkMUSICDB1: 1724(oracle) 1726(oracle) 1728(oracle) 1730(oracle) 1732(oracle) 1736(oracle) 1738(oracle) 1741(oracle) 1840(oracle) 1968(oracle) 1970(oracle) 1995(oracle) 1997(oracle) 2910(oracle) 2912(oracle) 2914(oracle) 2916(oracle)
2918(oracle) 3198(oracle) 3263(oracle)

杀掉先

/sbin/fuser -k lkMUSICDB1

再查，发现已经没有资源占用

/sbin/fuser -u lkMUSICDB1

ok！

再次启动Oracle

SQL> connect / as sysdba

Connected to an idle instance.

SQL> startup

ORACLE instance started.

Total System Global Area 1224736768 bytes

Fixed Size 778876 bytes

Variable Size 652483972 bytes

Database Buffers 570425344 bytes

Redo Buffers 1048576 bytes

Database mounted.

Database opened.