环境模拟

删除状态为active的联机日志，然后强行关闭数据库

处理过程

SQL> startup ORACLE instance started.

Total System Global Area 167772160 bytes

Fixed Size 1260720 bytes Variable Size 142607184 bytes Database Buffers 16777216 bytes Redo Buffers 7127040 bytes Database mounted. ORA-00313: open failed for members of log group 1 of thread 1 ORA-00312: online log 1 thread 1: ‘/u01/oradata/xienfei/redo01.log’ ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory Additional information: 3

Alert.log 日志中错误

Wed Aug 24 00:26:33 2011 Errors in file /u01/admin/xienfei/udump/xff_ora_9186.trc: ORA-00313: open failed for members of log group 1 of thread 1 ORA-00312: online log 1 thread 1: ‘/u01/oradata/xienfei/redo01.log’ ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory Additional information: 3

xff_ora_9186.trc文件中错误

ORA-00313: open failed for members of log group 1 of thread 1 ORA-00312: online log 1 thread 1: ‘/u01/oradata/xienfei/redo01.log’ ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory Additional information: 3

查询当前日志组状态

SQL> select a.group#,a.status,b.member from v$log a,v$logfile b where a.group#=b.group#;

GROUP# STATUS MEMBER

———- —————- ——————————————— 1 CURRENT /u01/oradata/xienfei/redo01.log 3 INACTIVE /u01/oradata/xienfei/redo03.log 2 ACTIVE /u01/oradata/xienfei/redo02.log

尝试删除redo日志

SQL> alter database drop logfile group 1; alter database drop logfile group 1 * ERROR at line 1: ORA-01623: log 1 is current log for instance xff (thread 1) – cannot drop ORA-00312: online log 1 thread 1: ‘/u01/oradata/xienfei/redo01.log’

发现是当前日志不能被删除，尝试切换日志

SQL> alter system switch logfile; alter system switch logfile * ERROR at line 1: ORA-01109: database not open

在数据库未打开状态，不能切换日志，只能尝试清空日志

SQL> alter database clear unarchived logfile group 1; alter database clear unarchived logfile group 1 * ERROR at line 1: ORA-01624: log 1 needed for crash recovery of instance xff (thread 1) ORA-00312: online log 1 thread 1: ‘/u01/oradata/xienfei/redo01.log’

因为数据库恢复需要使用，不能被清空，尝试不完成恢复

SQL> recover database until cancel; ORA-00279: change 1272687 generated at 08/24/2011 00:20:05 needed for thread 1 ORA-00289: suggestion : /u01/archive/1_27_756841839.arc ORA-00280: change 1272687 for thread 1 is in sequence #27

Specify log: {=suggested | filename | AUTO | CANCEL}

auto ORA-00279: change 1272903 generated at 08/24/2011 00:25:17 needed for thread 1 ORA-00289: suggestion : /u01/archive/1_28_756841839.arc ORA-00280: change 1272903 for thread 1 is in sequence #28 ORA-00278: log file ‘/u01/archive/1_27_756841839.arc’ no longer needed for this recovery

ORA-00308: cannot open archived log ‘/u01/archive/1_28_756841839.arc’

ORA-27037: unable to obtain file status Linux Error: 2: No such file or directory Additional information: 3

ORA-01547: warning: RECOVER succeeded but OPEN RESETLOGS would get error below

ORA-01194: file 1 needs more recovery to be consistent ORA-01110: data file 1: ‘/u01/oradata/xienfei/system01.dbf’

已经提示数据不一致，尝试着打开数据库

SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-01194: file 1 needs more recovery to be consistent ORA-01110: data file 1: ‘/u01/oradata/xienfei/system01.dbf’

创建pfile文件，添加隐含参数，使之不进行检查点一致性校验

SQL> create pfile=’/tmp/pfile’ from spfile;

File created.

修改pfile ，添加以下参数

*._allow_resetlogs_corruption=TRUE *._allow_error_simulation=TRUE

SQL> shutdown abort

ORACLE instance shut down.

使用pfile打开数据库

SQL> startup pfile=’/tmp/pfile’ ORACLE instance started.

Total System Global Area 167772160 bytes

Fixed Size 1260720 bytes Variable Size 150995792 bytes Database Buffers 8388608 bytes Redo Buffers 7127040 bytes Database mounted. ORA-38760: This database instance failed to turn on flashback database

发现flashback导致数据库不能被正常打开，尝试关闭它

SQL> alter database flashback off;

Database altered.

尝试直接open数据库

SQL> alter database open; alter database open * ERROR at line 1: ORA-01589: must use RESETLOGS or NORESETLOGS option for database open

根据提示，使用resetlogs打开数据库

SQL> alter database open resetlogs;

Database altered.

查询日志状态

SQL> select a.group#,a.status,b.member from v$log a,v$logfile b where a.group#=b.group#;

GROUP# STATUS MEMBER

———- —————- ——————————————— 3 UNUSED /u01/oradata/xienfei/redo03.log 2 UNUSED /u01/oradata/xienfei/redo02.log 1 CURRENT /u01/oradata/xienfei/redo01.log

因为group1错误，而当前日志组在group 1上，所以切换日志组

SQL> alter system switch logfile;

System altered.

SQL> select a.group#,a.status,b.member from v$log a,v$logfile b where a.group#=b.group#;

GROUP# STATUS MEMBER

———- —————- ——————————————— 3 UNUSED /u01/oradata/xienfei/redo03.log 2 CURRENT /u01/oradata/xienfei/redo02.log 1 ACTIVE /u01/oradata/xienfei/redo01.log

SQL> alter system checkpoint;

System altered.

SQL> select a.group#,a.status,b.member from v$log a,v$logfile b where a.group#=b.group#;

GROUP# STATUS MEMBER

———- —————- ——————————————— 3 UNUSED /u01/oradata/xienfei/redo03.log 2 CURRENT /u01/oradata/xienfei/redo02.log 1 INACTIVE /u01/oradata/xienfei/redo01.log 删除有问题的group 1日志组 SQL> alter database drop logfile group 1;

Database altered.

SQL> alter system switch logfile;

System altered.

添加日志组并检查是否正确

SQL> select a.group#,a.status,b.member from v$log a,v$logfile b where a.group#=b.group#;

GROUP# STATUS MEMBER

———- —————- ——————————————— 3 CURRENT /u01/oradata/xienfei/redo03.log 2 ACTIVE /u01/oradata/xienfei/redo02.log

SQL> alter database add logfile group 1 ‘/u01/oradata/xienfei/redo01.log’ size 50m reuse;

Database altered.

SQL> alter system switch logfile;

System altered.

SQL> select a.group#,a.status,b.member from v$log a,v$logfile b where a.group#=b.group#;

GROUP# STATUS MEMBER

———- —————- ——————————————— 3 ACTIVE /u01/oradata/xienfei/redo03.log 2 ACTIVE /u01/oradata/xienfei/redo02.log 1 CURRENT /u01/oradata/xienfei/redo01.log

注意：根据oracle官方建议，使用oracle隐含参数运行数据库可能存在很多不稳定因素，建议立即导出数据库数据，然后新建库，重新导入数据

 

更多精彩Oracle内容 请关注我：