今天，有网友遇到ORA-00600[kcratr_nab_less_than_odr]错误，这个错误在metalink上没有相关的描述，网友的描述是异常关闭虚拟机，之后再用数据库的时候就起不来，报ORA-00600[kcratr_nab_less_than_odr]错误，在要来告警日至和trace文件后，发现告警日至记录以下错误信息：

alter database open
Beginning crash recovery of 1 threads
Started redo scan
Completed redo scan
read 226 KB redo, 81 data blocks need recovery
Errors in file /u01/app/oracle/diag/rdbms/orcl/hyyk/trace/hyyk_ora_4010.trc  (incident=6155):
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6], [37640], [38119], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/orcl/hyyk/incident/incdir_6155/hyyk_ora_4010_i6155.trc
Aborting crash recovery due to error 600
Errors in file /u01/app/oracle/diag/rdbms/orcl/hyyk/trace/hyyk_ora_4010.trc:
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6], [37640], [38119], [], [], [], [], [], [], []
Errors in file /u01/app/oracle/diag/rdbms/orcl/hyyk/trace/hyyk_ora_4010.trc:
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6], [37640], [38119], [], [], [], [], [], [], []
ORA-600 signalled during: alter database open

trace文件记录以下错误信息：

WARNING! Crash recovery of thread 1 seq 6 is
ending at redo block 37640 but should not have ended before
redo block 38119
*** 2013-03-19 17:05:45.841
Incident 6155 created, dump file: /u01/app/oracle/diag/rdbms/orcl/hyyk/incident/incdir_6155/hyyk_ora_4010_i6155.trc
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6], [37640], [38119], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6], [37640], [38119], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1], [6], [37640], [38119], [], [], [], [], [], [], []

从trace文件看，数据库需要恢复到rba 38119，可是由于异常关闭数据库导致数据库只能恢复到rba 37640，虽然这个问题在metalink上没有找到相关资料，但是在程飞(惜分飞)的博客上找到了解决方法，如下：

1. 重建控制文件

SQL> ALTER DATABASE BACKUP CONTROLFILE TOTRACE AS'D:/1.TXT';

数据库已更改。
SQL> SHUTDOWN IMMEDIATE;
ORA-01109: 数据库未打开
已经卸载数据库。
ORACLE 例程已经关闭。
SQL> STARTUP NOMOUNT;

ORACLE 例程已经启动。
Total System GlobalArea  417546240 bytes
Fixed Size                  2176328 bytes
Variable Size             268438200 bytes
DatabaseBuffers          138412032 bytes
Redo Buffers                8519680 bytes
SQL> CREATE CONTROLFILE REUSE DATABASE "DBDMS" NORESETLOGS  NOARCHIVELOG
2      MAXLOGFILES 16
3      MAXLOGMEMBERS 3
4      MAXDATAFILES 100
5      MAXINSTANCES 8
6      MAXLOGHISTORY 18688
7  LOGFILE
8    GROUP1 'D:DBDMSLOGREDO01.LOG'  SIZE50M BLOCKSIZE 512,
9    GROUP2 'D:DBDMSLOGREDO02.LOG'  SIZE50M BLOCKSIZE 512,
10    GROUP3 'D:DBDMSLOGREDO03.LOG'  SIZE50M BLOCKSIZE 512
11  DATAFILE
12    'D:DBDMSDATASYSTEM01.DBF',
13    'D:DBDMSDATASYSAUX01.DBF',
14    'D:DBDMSDATARBSG01.DBF',
15    'D:DBDMSDATADATA01.DBF',
16    'D:DBDMSDATAINDX01.DBF',
17    'D:DBDMSDATADATA02.DBF',
18    'D:DBDMSDATADATA03.DBF',
19    'D:DBDMSDATADATA04.DBF',
20    'D:DBDMSDATAINDX02.DBF',
21    'D:DBDMSDATASYSTEM02.DBF'
22  CHARACTERSETZHS16GBK
23  ;

控制文件已创建。

2. 继续尝试恢复

SQL> RECOVER DATABASE;

完成介质恢复。

3. 打开数据库

SQL> ALTER DATABASEOPEN;

数据库已更改。

如果redo日志损坏，那么就需要进行不完全恢复，第二步改为以下操作：

SQL> RECOVER DATABASE UNTIL CANCEL;

第三步改为以下操作：

SQL> ALTER DATABASE OPEN RESETLOGS;

本文固定链接: http://www.dbdream.com.cn/2013/03/ora-00600kcratr_nab_less_than_odr%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88/ | 信春哥，系统稳，闭眼上线不回滚！