Category Archives: Oracle备份恢复

ORACLE 12C 控制文件异常恢复

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在oracle 12c引进了pdb的概念,但重建控制文件的过程还是完全和no-cdb(以前版本ORACLE)相同
数据库启动异常

idle> startup
ORACLE instance started.

Total System Global Area  521936896 bytes
Fixed Size                  2404552 bytes
Variable Size             205524792 bytes
Database Buffers          306184192 bytes
Redo Buffers                7823360 bytes
ORA-00205: error in identifying control file, check alert log for more info


idle> select * from v$version;

BANNER                                                                               CON_ID
-------------------------------------------------------------------------------- ----------
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production              0
PL/SQL Release 12.1.0.1.0 - Production                                                    0
CORE    12.1.0.1.0      Production                                                        0
TNS for 64-bit Windows: Version 12.1.0.1.0 - Production                                   0
NLSRTL Version 12.1.0.1.0 - Production                                                    0

alert日志信息

Wed Mar 19 20:30:20 2014
ALTER DATABASE   MOUNT
Wed Mar 19 20:30:20 2014
ORA-00210: ???????????
ORA-00202: ????: ''E:\APP\XIFENFEI\ORADATA\CDB\CONTROL01.CTL''
ORA-27048: skgfifi: ????????
OSD-04001: 逻辑块大小无效
ORA-205 signalled during: ALTER DATABASE   MOUNT...

利用strings命令找出来数据文件和联机日志路径

E:\APP\XIFENFEI\ORADATA\CDB\REDO04.LOG
E:\APP\XIFENFEI\ORADATA\CDB\REDO06.LOG
E:\APP\XIFENFEI\ORADATA\CDB\REDO05.LOG
E:\APP\XIFENFEI\ORADATA\CDB\PDB\PDB_USERS01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDB\SYSAUX01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDB\SYSTEM01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\USERS01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\UNDOTBS01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDBSEED\SYSAUX01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\SYSAUX01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDBSEED\SYSTEM01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\SYSTEM01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\TEMP01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDB\TEMP01.DBF

如果有完整的alert日志也可以通过alert日志来分析数据文件路径和redo路径;
通过alert日志分析数据库编码,如果没有alert日志通过分析prop$分析编码;
redo group 可以在alert日志中查看,写入错误,在创建时候会提示正确值;
redo size 可以查看redo file,也可以先写入错误值,创建时候会提示正确block数量

重建控制文件

idle> CREATE CONTROLFILE REUSE DATABASE "CDB" NORESETLOGS FORCE LOGGING ARCHIVELOG
  2      MAXLOGFILES 16
  3      MAXLOGMEMBERS 3
  4      MAXDATAFILES 100
  5      MAXINSTANCES 8
  6      MAXLOGHISTORY 2921
  7  LOGFILE
  8  GROUP 4 'E:\APP\XIFENFEI\ORADATA\CDB\REDO04.LOG' size 50M,
  9  GROUP 6 'E:\APP\XIFENFEI\ORADATA\CDB\REDO06.LOG'  size 50M,
 10  GROUP 5 'E:\APP\XIFENFEI\ORADATA\CDB\REDO05.LOG'  size 50M
 11  DATAFILE
 12  'E:\APP\XIFENFEI\ORADATA\CDB\PDB\PDB_USERS01.DBF',
 13  'E:\APP\XIFENFEI\ORADATA\CDB\PDB\SYSAUX01.DBF',
 14  'E:\APP\XIFENFEI\ORADATA\CDB\PDB\SYSTEM01.DBF',
 15  'E:\APP\XIFENFEI\ORADATA\CDB\UNDOTBS01.DBF',
 16  'E:\APP\XIFENFEI\ORADATA\CDB\PDBSEED\SYSAUX01.DBF',
 17  'E:\APP\XIFENFEI\ORADATA\CDB\SYSAUX01.DBF',
 18  'E:\APP\XIFENFEI\ORADATA\CDB\PDBSEED\SYSTEM01.DBF',
 19  'E:\APP\XIFENFEI\ORADATA\CDB\SYSTEM01.DBF',
 20  'E:\APP\XIFENFEI\ORADATA\CDB\USERS01.DBF'
 21  CHARACTER SET ZHS16GBK
 22  ;

控制文件已创建。

idle> recover database;
完成介质恢复。
idle> alter database open;

数据库已更改。

idle> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 PDB                            MOUNTED
idle> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
E:\APP\XIFENFEI\ORADATA\CDB\SYSTEM01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDBSEED\SYSTEM01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\SYSAUX01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDBSEED\SYSAUX01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\USERS01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDB\SYSTEM01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDB\SYSAUX01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\PDB\PDB_USERS01.DBF
E:\APP\XIFENFEI\ORADATA\CDB\UNDOTBS01.DBF

已选择 9 行。

CDB_CDB$ROOT@SYS> alter session set container=pdb;

Session altered.

CDB_CDB$ROOT@SYS> alter database open;

Database altered.

数据库在mount状态重建控制文件请参考:重建控制文件

解决imp导入数据报IMP-00098错误

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晚上十点多，准备睡觉了，一个朋友在qq上找到我,说他们数据库imp异常,希望我帮忙看看
大概情况
使用exp/imp升级并迁移数据库从win 10.2.0.1 升级到linux 11.2.0.3 由于硬盘空间不够，使用exp把win上面数据导出来，格式化掉win的数据文件所在硬盘格式化并加入到linux系统中(也就是说，故障之时，只有dmp文件，没有了数据文件）,因为原库没有了,dmp又报错,所以担心了起来.
imp报错信息

Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Tes

Export file created by EXPORT:V10.02.01 via conventional path
import done in ZHS16GBK character set and AL16UTF16 NCHAR character set
export client uses US7ASCII character set (possible charset conversion)
. . importing table                "ART_T_ARCTYPE"          0 rows imported
. . importing table                "ART_T_ARTICLE"          0 rows imported
……
. . importing table            "EVT_T_ACCEPT_CODE"          1 rows imported
. . importing table            "EVT_T_ACCEPT_FLOW"
 illegal lob length marker 51166 
 bytesread = 00000000000 
 TABLE =EVT_T_ACCEPT_FLOW   EVT_T_ACCEPT_FLOW
IMP-00098: INTERNAL ERROR: impgst2
IMP-00028: partial import of previous table rolled back: 680071 rows rolled back
IMP-00008: unrecognized statement in the export file: 
  ??????????????????
IMP-00008: unrecognized statement in the export file: 
  .:
IMP-00008: unrecognized statement in the export file: 
  $;
IMP-00008: unrecognized statement in the export file: 
  ||$
…………

这里可以知道数据库exp的客户端是版本是10.2.0.1,使用编码是US7ASCII,但是导入的库编码是ZHS16GBK

exp日志信息

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses ZHS16GBK character set (possible charset conversion)

EXP-00091: Exporting questionable statistics.
. . exporting table              EVT_T_ACCEPT_FLOW    3470071 rows exported
. . exporting table             EVT_T_ACCEPT_FLOW1    2707606 rows exported
……
. exporting post-schema procedural objects and actions
. exporting statistics
Export terminated successfully with warnings.

这里我们可以知道数据库编码是ZHS16GBK,exp客户端编码为US7ASCII,因此到导出过程中发生了一次由ZHS16GBK到US7ASCII的编码转换

检查新库发现,其db编码为ZHS16GBK,新库的NLS设置为:nls_lang=AMERICAN_AMERICA.ZHS16GBK
整个导出流程是:db编码为ZHS16GBK的数据库被客户端编码为US7ASCII的exp导出,然后被编码为ZHS16GBK的imp导入到db编码为ZHS16GBK的数据库中

故障可能性定位
1.可能在从ZHS16GBK到US7ASCII的编码转换中发生数据异常,也就是说dmp文件本身异常(我们最不希望出现的结果)
2.由于数据库导出过场会发生编码转换(ZHS16GBK->US7ASCII),而导入过程未发生编码转换(ZHS16GBK->ZHS16GBK),从而出现异常

分析并解决
1. 使用dul扫描dmp文件发现汉字都能够识别,而且exp成功的记录条数在dul扫描中都完全正常恢复出来,证明dmp文件是正常的
2. 基于dmp文件正常,编码转换的过程,得出结论在该库的imp过程中设置nls_lang=AMERICAN_AMERICA.US7ASCII问题应该就可以正常解决.果不其然,设置了NLS_LANG之后imp导入数据OK

得出结论
1. 做升级,迁移尽快保留多一份数据,这次吓得不轻
2. exp/imp最好前后客户端编码一致,否则可能被转换晕

undo异常总结和恢复思路

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UNDO异常报错千奇百怪,针对本人遇到的比较常见的undo异常报错进行汇总，仅供参考，数据库恢复过程是千奇百怪的，不能照搬硬套.
ORA-00704/ORA-00376
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 2
ORA-00376: file 3 cannot be read at this time
ORA-01110: data file 3: ‘/u01/oracle/oradata/ora11g/undotbs01.dbf’
Error 704 happened during db open, shutting down database
USER (ospid: 17864): terminating the instance due to error 704
Instance terminated by USER, pid = 17864
ORA-1092 signalled during: alter database open…
opiodr aborting process unknown ospid (17864) as a result of ORA-1092

ORA-00600[4097]
Fri Aug 31 23:14:10 2012
Errors in file /u01/oradata/orcl/bdump/orcl_smon_15589.trc:
ORA-00600: internal error code, arguments: [4097], [], [], [], [], [], [], []
Fri Aug 31 23:14:12 2012
Non-fatal internal error happenned while SMON was doing logging scn->time mapping.
SMON encountered 1 out of maximum 100 non-fatal internal errors.

ORA-01595/ORA-00600[4194]
Fri Aug 31 23:14:14 2012
Errors in file /u01/oradata/orcl/bdump/orcl_smon_15589.trc:
ORA-01595: error freeing extent (2) of rollback segment (4))
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [48], [34], [], [], [], [], []

0RA-00600[4193]
Tue Feb 14 09:35:34 2012
Errors in file d:\oracle\product\10.2.0\admin\interlib\udump\interlib_ora_2824.trc:
ORA-00603: ORACLE server session terminated by fatal error
ORA-00600: internal error code, arguments: [4193], [2005], [2008], [], [], [], [], []

ORA-00600[kcfrbd_3]
Wed Dec 05 10:26:35 2012
SMON: enabling tx recovery
Wed Dec 05 10:26:35 2012
Database Characterset is ZHS16GBK
Wed Dec 05 10:26:35 2012
Errors in file d:\oracle\product\10.2.0\admin\orcl\bdump\orcl_smon_548.trc:
ORA-00600: internal error code, arguments: [kcfrbd_3], [2], [2279045], [1], [2277120], [2277120], [], []
SMON: terminating instance due to error 474

ORA-00600[4137]
Fri Jul 6 18:00:40 2012
SMON: ignoring slave err,downgrading to serial rollback
Fri Jul 6 18:00:41 2012
Errors in file /usr/local/oracle/admin/techdb/bdump/techdb_smon_16636.trc:
ORA-00600: internal error code, arguments: [4137], [], [], [], [], [], [], []
ORACLE Instance techdb (pid = 8) – Error 600 encountered while recovering transaction (3, 17).

ORA-01595/ORA-01594
Sat May 12 21:54:17 2012
Errors in file /oracle/app/admin/prmdb/bdump/prmdb2_smon_483522.trc:
ORA-01595: error freeing extent (2) of rollback segment (19))
ORA-01594: attempt to wrap into rollback segment (19) extent (2) which is being freed

ORA-00704/ORA-01555
Fri May 4 21:04:21 2012
select ctime, mtime, stime from obj$ where obj# = :1
Fri May 4 21:04:21 2012
Errors in file /oracle/admin/standdb/udump/perfdb_ora_1286288.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 40 with name “_SYSSMU40$” too small
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 1286288
ORA-1092 signalled during: alter database open resetlogs…

ORA-00607/ORA-00600[4194]
Block recovery completed at rba 3994.5.16, scn 0.89979533
Thu Jul 26 13:21:11 2012
Errors in file /orasvr/admin/mispdata/udump/mispdata_ora_2865.trc:
ORA-00604: error occurred at recursive SQL level 1
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [31], [2], [], [], [], [], []
Error 604 happened during db open, shutting down database
USER: terminating instance due to error 604
Instance terminated by USER, pid = 2865
ORA-1092 signalled during: ALTER DATABASE OPEN…

ORA-00704/ORA-00600[4000]
Thu Feb 28 19:29:13 2013
Errors in file /u1/PROD/prodora/db/tech_st/10.2.0/admin/PROD_oracle/udump/prod_ora_20989.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00600: internal error code, arguments: [4000], [50], [], [], [], [], [], []
Thu Feb 28 19:29:13 2013
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 20989
ORA-1092 signalled during: ALTER DATABASE OPEN RESETLOGS…

undo异常恢复处理思路
除了极少数undo坏块,undo文件丢失外，大部分undo异常是因为redo未被正常进行前滚，从而导致undo回滚异常数据库无法open，解决此类问题，需要结合一般需要结合redo异常处理技巧在其中，一般undo异常处理思路
1.切换undo_management= MANUAL尝试启动数据库，如果不成功进入2
2.设置10513 等event尝试启动数据库，如果不成功进入3
3.使用_offline_rollback_segments/_corrupted_rollback_segments屏蔽回滚段
4.如果依然不能open数据库,考虑使用bbed工具提交事务，修改回滚段状态等操作
5.如果依然还不能open数据库，考虑使用dul

如果您按照上述步骤还不能解决,请联系我们,将为您提供专业数据库技术支持
Phone:17813235971    Q Q:107644445    E-Mail:dba@xifenfei.com

姊妹篇
ORACLE REDO各种异常恢复
ORACLE丢失各种文件导致数据库不能OPEN恢复

ORA-00600[kcrf_resilver_log_1]异常恢复

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朋友在win x64位上的ORACLE 11.2.0.1启动出现ORA-00600[kcrf_resilver_log_1],让我帮忙看看,通过分析主要是因为Unpblished Bug 9056657导致
数据库启动报错
数据库在open的时候报ORA-00600[kcrf_resilver_log_1]

SQL> alter database open;
alter database open
*
第 1 行出现错误:
ORA-00600: 内部错误代码, 参数: [kcrf_resilver_log_1], [0x7FF61C56E30], [2], [],
[], [], [], [], [], [], [], []

alert日志报错

Sat Mar 01 18:40:44 2014
alter database open
Beginning crash recovery of 1 threads
 parallel recovery started with 3 processes
Started redo scan
Errors in file f:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_6432.trc  (incident=61360):
ORA-00600: 内部错误代码, 参数: [kcrf_resilver_log_1], [0x7FF61C56E30], [2], [], [], [], [], [], [], [], [], []
Incident details in: f:\app\administrator\diag\rdbms\orcl\orcl\incident\incdir_61360\orcl_ora_6432_i61360.trc
Aborting crash recovery due to error 600
Errors in file f:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_6432.trc:
ORA-00600: 内部错误代码, 参数: [kcrf_resilver_log_1], [0x7FF61C56E30], [2], [], [], [], [], [], [], [], [], []
Errors in file f:\app\administrator\diag\rdbms\orcl\orcl\trace\orcl_ora_6432.trc:
ORA-00600: 内部错误代码, 参数: [kcrf_resilver_log_1], [0x7FF61C56E30], [2], [], [], [], [], [], [], [], [], []
ORA-600 signalled during: alter database open...

分先相关SCN
控制文件scn
1
控制文件中数据文件scn
2
数据文件头scn3
通过这里可以知道,数据文件头的scn,控制文件中关于数据文件的scn都表明数据库为正常关闭,且scn值为16574746，但是控制文件中记录数据库SCN的值为16551515,可以判断数据库因为某种原因导致控制文件中的部分scn记录异常.

处理方法
因为控制文件SCN异常,考虑直接重建控制文件或者using backup controlfile方式恢复

SQL> select group#,status,sequence# from v$log;

    GROUP# STATUS            SEQUENCE#
---------- ---------------- ----------
         1 CURRENT                1510
         3 ACTIVE                 1509
         2 ACTIVE                 1508

    GROUP# MEMBER
---------- --------------------------------------------------
         3 F:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO03.LOG
         2 F:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO02.LOG
         1 F:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO01.LOG

SQL> recover database using backup controlfile until cancel;
ORA-00279: 更改 16574746 (在 03/01/2014 13:10:11 生成) 对于线程 1 是必需的
ORA-00289: 建议: F:\APP\ADMINISTRATOR\FLASH_RECOVERY_AREA\ORCL\ARCHIVELOG\2014_0
3_01\O1_MF_1_1510_%U_.ARC
ORA-00280: 更改 16574746 (用于线程 1) 在序列 #1510 中


指定日志: {<RET>=suggested | filename | AUTO | CANCEL}
F:\APP\ADMINISTRATOR\ORADATA\ORCL\REDO01.LOG
已应用的日志。
完成介质恢复。
SQL> alter database open resetlogs;

数据库已更改。

在最近的同样的错误，但是没有如此的幸运具体参考:记录一次ORA-00600 [kcrf_resilver_log_1] 恢复过程

ORACLE REDO各种异常恢复

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redo是oracle数据库比较核心文件,当redo异常之后,数据库无法正常启动,而且有丢失数据的风险,强烈建议条件允许redo多路镜像.redo文件异常的故障可以说是千奇百怪,但是总体上可以分为几类:
数据库归档/非归档模式下inactive redo异常
ORA-00316 ORA-00327

SQL> startup mount
ORACLE instance started.

Total System Global Area  260046848 bytes
Fixed Size                  1266896 bytes
Variable Size              83888944 bytes
Database Buffers          167772160 bytes
Redo Buffers                7118848 bytes
Database mounted.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00316: log 2 of thread 1, type  in header is not log file
ORA-00312: online log 2 thread 1: '/u01/oracle/oradata/XFF/redo02.log'

SQL> col member for a40
SQL> set lines 120
SQL>   SELECT thread#,
  2           a.sequence#,
  3           a.group#,
  4           TO_CHAR (first_change#, '9999999999999999') "SCN",
  5           a.status,
  6           MEMBER
  7      FROM v$log a, v$logfile b
  8     WHERE a.group# = B.GROUP#
  9  ORDER BY a.sequence# DESC;

   THREAD#  SEQUENCE#     GROUP# SCN               STATUS           MEMBER
---------- ---------- ---------- ----------------- ---------------- -----------------------------------
         1         15          3            665697 CURRENT          /u01/oracle/oradata/XFF/redo03.log
         1         14          2            645619 INACTIVE         /u01/oracle/oradata/XFF/redo02.log
         1         13          1            625540 INACTIVE         /u01/oracle/oradata/XFF/redo01.log

SQL> ALTER DATABASE CLEAR LOGFILE GROUP 2;

Database altered.

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00327: log 2 of thread 1, physical size  less than needed
ORA-00312: online log 2 thread 1: '/u01/oracle/oradata/XFF/redo02.log'

SQL> alter database drop logfile group 2;

Database altered.

SQL> alter database open;

Database altered.

SQL> alter database add logfile group 2 ('/u01/oracle/oradata/XFF/redo02.log') size 50M reuse;

Database altered.

正常关闭数据库current redo异常
ORA-00316 ORA-01623

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00316: log 1 of thread 1, type  in header is not log file
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'

SQL>   SELECT thread#,
  2           a.sequence#,
  3           a.group#,
  4           TO_CHAR (first_change#, '9999999999999999') "SCN",
  5           a.status,
  6           MEMBER
  7      FROM v$log a, v$logfile b
  8     WHERE a.group# = B.GROUP#
  9  ORDER BY a.sequence# DESC;

   THREAD#  SEQUENCE#     GROUP# SCN               STATUS           MEMBER
---------- ---------- ---------- ----------------- ---------------- ----------------------------------
         1         16          1            685918 CURRENT          /u01/oracle/oradata/XFF/redo01.log
         1         15          3            665697 INACTIVE         /u01/oracle/oradata/XFF/redo03.log
         1          0          2                 0 UNUSED           /u01/oracle/oradata/XFF/redo02.log

SQL> ALTER DATABASE CLEAR LOGFILE GROUP 1;
ALTER DATABASE CLEAR LOGFILE GROUP 1
*
ERROR at line 1:
ORA-00316: log 1 of thread 1, type 0 in header is not log file
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'


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/oracle/oradata/XFF/redo01.log'

SQL> recover database until cancel;
Media recovery complete.
SQL> alter database open resetlogs;

Database altered.

数据库异常关闭current/active redo异常
ORA-00316 ORA-01624 ORA-01194

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00316: log 1 of thread 1, type 0 in header is not log file
ORA-00312: online log 1 thread 1: '/u01/oracle/oradata/XFF/redo01.log'

SQL>   SELECT thread#,
  2           a.sequence#,
  3           a.group#,
  4           TO_CHAR (first_change#, '9999999999999999') "SCN",
  5           a.status,
  6           MEMBER
  7      FROM v$log a, v$logfile b
  8     WHERE a.group# = B.GROUP#
  9  ORDER BY a.sequence# DESC;

   THREAD#  SEQUENCE#     GROUP# SCN               STATUS           MEMBER
---------- ---------- ---------- ----------------- ---------------- -----------------------------------
         1          8          2            686310 CURRENT          /u01/oracle/oradata/XFF/redo02.log
         1          7          1            686294 ACTIVE           /u01/oracle/oradata/XFF/redo01.log
         1          6          3            686289 INACTIVE         /u01/oracle/oradata/XFF/redo03.log

SQL> ALTER DATABASE CLEAR LOGFILE GROUP 1;
ALTER DATABASE CLEAR 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/oracle/oradata/XFF/redo01.log'


SQL> ALTER DATABASE drop logfile group 1;
ALTER DATABASE drop 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/oracle/oradata/XFF/redo01.log'


SQL> recover database until cancel
ORA-00279: change 686294 generated at 04/20/2013 01:37:16 needed for thread 1
ORA-00289: suggestion : /u01/oracle/oracle/product/10.2.0/db_1/dbs/arch1_7_813202529.dbf
ORA-00280: change 686294 for thread 1 is in sequence #7


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/oracle/oradata/XFF/redo01.log
ORA-00308: cannot open archived log '/u01/oracle/oradata/XFF/redo01.log'
ORA-27047: unable to read the header block of file
Additional information: 2


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
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/oracle/oradata/XFF/system01.dbf'


ORA-01112: media recovery not started


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/oracle/oradata/XFF/system01.dbf'

SQL> alter system set "_allow_resetlogs_corruption"=true scope=spfile;

System altered.

SQL> shutdown immediate;
ORA-01109: database not open


Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.

Total System Global Area  260046848 bytes
Fixed Size                  1266896 bytes
Variable Size              83888944 bytes
Database Buffers          167772160 bytes
Redo Buffers                7118848 bytes
Database mounted.
SQL> recover database until cancel
ORA-00279: change 686294 generated at 04/20/2013 01:37:16 needed for thread 1
ORA-00289: suggestion : /u01/oracle/oracle/product/10.2.0/db_1/dbs/arch1_7_813202529.dbf
ORA-00280: change 686294 for thread 1 is in sequence #7


Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
cancel
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/oracle/oradata/XFF/system01.dbf'


ORA-01112: media recovery not started


SQL> alter database open resetlogs;

Database altered.

在这样的情况下,数据库异常关闭,current/active redo异常,通过使用隐含参数可能可以侥幸的恢复数据库,但是也可能导致数据丢失.这里因为是模拟情况,无业务所以在很多较为繁忙的业务系统中,使用隐含参数resetlogs过程中可能还会遇到如下很多常见的错误,进一步增加了恢复难度

current/active redo异常后附带其他错误
ORA-600[2662]

Wed Dec 07 13:02:49 2011
SMON: enabling cache recovery
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_3388.trc  (incident=216664):
ORA-00600: 内部错误代码, 参数: [2662], [2], [1153862134], [2], [1153864845], [12582921], [], []
Incident details in: d:\app\administrator\diag\rdbms\hzyl\hzyl\incident\incdir_216664\hzyl_ora_3388_i216664.trc
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_3388.trc:
ORA-00600: 内部错误代码, 参数: [2662], [2], [1153862134], [2], [1153864845], [12582921], [], []
Error 600 happened during db open, shutting down database
USER (ospid: 3388): terminating the instance due to error 600

ORA-00600[4000]

Thu Feb 28 19:29:10 2013
SMON: enabling cache recovery
Thu Feb 28 19:29:11 2013
Errors in file /u1/PROD/prodora/db/tech_st/10.2.0/admin/PROD_oracle/udump/prod_ora_20989.trc:
ORA-00600: internal error code, arguments: [4000], [50], [], [], [], [], [], []
Thu Feb 28 19:29:13 2013
Incremental checkpoint up to RBA [0x1.3.0], current log tail at RBA [0x1.3.0]
Thu Feb 28 19:29:13 2013
Errors in file /u1/PROD/prodora/db/tech_st/10.2.0/admin/PROD_oracle/udump/prod_ora_20989.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00600: internal error code, arguments: [4000], [50], [], [], [], [], [], []

ORA-00704 ORA-00604 ORA-01555

Fri May  4 21:04:21 2012
select ctime, mtime, stime from obj$ where obj# = :1
Fri May  4 21:04:21 2012
Errors in file /oracle/admin/standdb/udump/perfdb_ora_1286288.trc:
ORA-00704: bootstrap process failure
ORA-00704: bootstrap process failure
ORA-00604: error occurred at recursive SQL level 1
ORA-01555: snapshot too old: rollback segment number 40 with name "_SYSSMU40$" too small
Error 704 happened during db open, shutting down database
USER: terminating instance due to error 704
Instance terminated by USER, pid = 1286288
ORA-1092 signalled during: alter database open resetlogs...

current/active redo异常还可能报如下错误
redo文件损坏报错

Started redo scan
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_2960.trc  (incident=214262):
ORA-00353: 日志损坏接近块 12014 更改 9743799889 时间 12/05/2011 09:21:11
ORA-00312: 联机日志 3 线程 1: 'R:\ORADATA\HZYL\REDO03.LOG'
Incident details in: d:\app\administrator\diag\rdbms\hzyl\hzyl\incident\incdir_214262\hzyl_ora_2960_i214262.trc
Aborting crash recovery due to error 368
Errors in file d:\app\administrator\diag\rdbms\hzyl\hzyl\trace\hzyl_ora_2960.trc:
ORA-00368: 重做日志块中的校验和错误
ORA-00353: 日志损坏接近块 12014 更改 9743799889 时间 12/05/2011 09:21:11
ORA-00312: 联机日志 3 线程 1: 'R:\ORADATA\HZYL\REDO03.LOG'
ORA-368 signalled during: ALTER DATABASE OPEN...

redo文件被其他实例占用报错

Wed May 16 17:03:11 2012
Started redo scan
Wed May 16 17:03:11 2012
Errors in file /oracle/admin/odsdb/udump/odsdb1_ora_2040024.trc:
ORA-00305: log 14 of thread 1 inconsistent; belongs to another database
ORA-00312: online log 14 thread 1: '/dev/rods_redo1_2_2'
ORA-00305: log 14 of thread 1 inconsistent; belongs to another database
ORA-00312: online log 14 thread 1: '/dev/rods_redo1_2_1'
ORA-305 signalled during: ALTER DATABASE OPEN...

存储整体异常

Mon Oct 17 09:35:09 2011
Errors in file /oracle/app/admin/orcl/bdump/orcl2_lgwr_348814.trc:
ORA-00340: IO error processing online log 4 of thread 2
ORA-00345: redo log write error block 6732 count 2
ORA-00312: online log 4 thread 2: '/dev/rredo21'
ORA-27063: number of bytes read/written is incorrect
IBM AIX RISC System/6000 Error: 6: No such device or address
Additional information: -1
Additional information: 1024
Mon Oct 17 09:35:09 2011
LGWR: terminating instance due to error 340

存储IO异常

Fri Feb 21 08:44:42 2014
Thread 1 advanced to log sequence 591 (LGWR switch)
  Current log# 1 seq# 591 mem# 0: J:\ORADATA\ORCL\REDO01.LOG
Fri Feb 21 15:31:20 2014
Errors in file c:\oracle\product\10.2.0\admin\orcl\bdump\orcl_lgwr_10312.trc:
ORA-00316: log 1 of thread 1, type 286 in header is not log file
ORA-00312: online log 1 thread 1: 'J:\ORADATA\ORCL\REDO01.LOG'

使用_disable_logging参数

Sat May 14 23:16:49 2005
Errors in file d:\oracle\admin\rman\bdump\rman_arc0_736.trc:
ORA-16038: log 3 sequence# 72 cannot be archived
ORA-00354: corrupt redo log block header
ORA-00312: online log 3 thread 1: 'D:\ORACLE\ORADATA\RMAN\REDO03.LOG'

如果你在使用这些思路进行恢复遇到突发情况不能自行解决,请联系我们,将为您提供专业数据库技术支持
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姊妹篇
undo异常总结和恢复思路
ORACLE丢失各种文件导致数据库不能OPEN恢复