ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr]問題處理
伺服器斷電，異常關機後，重啟報錯ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr]
資料庫執行環境是Linux上執行的ORACLE11G
--嘗試啟動資料庫例項，報錯如下：
SQL> startup
ORACLE instance started.
Total System Global Area 1068937216 bytes
Fixed Size 2260088 bytes
Variable Size 624952200 bytes
Database Buffers 436207616 bytes
Redo Buffers 5517312 bytes
Database mounted.
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1],
[89], [32294], [32511], [], [], [], [], [], [], []
--此時資料庫啟動到mount狀態，嘗試以resetlogs方式open資料庫，也無法開啟
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
MOUNTED
SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery
--嘗試recover後，開啟資料庫，仍然報相同錯誤
SQL> recover database;
Media recovery complete.
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [kcratr_nab_less_than_odr], [1],
[89], [32294], [32511], [], [], [], [], [], [], []
查詢告警日誌alter和trace檔案,對照上網查詢錯誤，獲取報錯原因：
由於伺服器異常短電，導致LGWR寫聯機日誌檔案時失敗，下次重新啟動資料庫時，需要做例項級恢復，而又無法從聯機日誌檔案裡獲取到這些redo資訊，因為上次斷電時，寫日誌失敗了
--檢視當前日誌檔案情況，從以下查詢結果可以看到當前日誌組為89，
SQL> select group#,sequence#,status,first_time,next_change# from v$log;
GROUP# SEQUENCE# STATUS FIRST_TIM NEXT_CHANGE#
---------- ---------- ---------------- --------- ------------
1 88 INACTIVE 16-JUN-16 3012456638
2 89 CURRENT 16-JUN-16 2.8147E+14
3 87 INACTIVE 16-JUN-16 3012450709
4 1 INACTIVE 13-JUN-16 3011785042
5 0 UNUSED 0
--恢復資料庫，指定redo02.log日誌
SQL> recover database until cancel using backup controlfile;
ORA-00279: change 3012500746 generated at 06/16/2016 22:40:33 needed for thread
1
ORA-00289: suggestion :
/u01/app/oracle/fast_recovery_area/ORCL/archivelog/2016_06_16/o1_mf_1_89_%u_.arc
ORA-00280: change 3012500746 for thread 1 is in sequence #89
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
/u01/app/oracle/oradata/orcl/redo02.log(自己資料庫的日誌檔案路徑)
Log applied.
Media recovery complete.
--恢復完成後，再次可以正常開啟資料庫，重啟資料庫正常。
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01589: must use RESETLOGS or NORESETLOGS option for database open
SQL> alter database open resetlogs;
Database altered.