记录一则强制开库遭遇ORA-16433的处理过程

不念不忘少年蓝@ 2022-10-22 08:00 89阅读 0赞

客户的一套开发环境，大概了解到的背景是清理空间时redo被运维人员当作log误删除，一线同事先接手处理，过程中遇到问题升级到我这里继续分析。  
接手后，数据库处于mount状态，之前恢复过程中已经做过resetlogs的操作，也设置了"\_allow\_resetlogs\_corruption"隐藏参数为true，目前直接开库会提示需要恢复，重新进行resetlogs时报错ORA-600 \[2662\]，起初看到这个错误心中略有些放松，根据经验，推下SCN就好了：

`SQL> alter database open; alter database open * ERROR at line 1: ORA-01113: file 1 needs media recovery ORA-01110: data file 1: '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-SYSTEM_FNO-1_1bujd4ob.dbf' SQL> recover database ; ORA-00283: recovery session canceled due to errors ORA-00399: corrupt change description in redo log ORA-00353: log corruption near block 3 change 32581427074 time 08/25/2020 11:39:04 ORA-00312: online log 5 thread 1: '/oradata/ODSDB/datafile/redo05.log' SQL> recover datafile 1; ORA-00283: recovery session canceled due to errors ORA-00399: corrupt change description in redo log ORA-00353: log corruption near block 3 change 32581427074 time 08/25/2020 11:39:04 ORA-00312: online log 5 thread 1: '/oradata/ODSDB/datafile/redo05.log' SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-01139: RESETLOGS option only valid after an incomplete database recovery SQL> recover database using backup controlfile until cancel; ORA-00279: change 32581427072 generated at needed for thread 1 Specify log: {<RET>=suggested | filename | AUTO | CANCEL} auto ORA-00266: name of archived log file needed 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: '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-SYSTEM_FNO-1_1bujd4ob.dbf' SQL> alter database open resetlogs; alter database open resetlogs * ERROR at line 1: ORA-00603: ORACLE server session terminated by fatal error ORA-00600: internal error code, arguments: [2662], [7], [2516656013], [7], [2516660859], [327174016], [], [], [], [], [], [] ORA-00600: internal error code, arguments: [2662], [7], [2516656012], [7], [2516660859], [327174016], [], [], [], [], [], [] ORA-01092: ORACLE instance terminated. Disconnection forced ORA-00600: internal error code, arguments: [2662], [7], [2516656008], [7], [2516660859], [327174016], [], [], [], [], [], [] Process ID: 3997864 Session ID: 580 Serial number: 5`

重新启动到mount状态，根据上面报错计算要推进的SCN值：

`SQL> select open_mode from v$database; OPEN_MODE -------------------- MOUNTED SQL> select current_scn from v$database; SQL> set num 30 30217546463 select 7*power(2,32) + 2516660859 from dual; select 7*power(2,32) + 2516661000 from dual; 32581432072`

使用oradebug poke进行SCN推进：

`oradebug setmypid oradebug dumpvar sga kcsgscn_ oradebug poke 0x700000000019B70 8 32581432072 oradebug dumpvar sga kcsgscn_`

推进SCN后，尝试直接开库报错ORA-00399、ORA-00353、ORA-00312：

`SQL> oradebug setmypid Statement processed. SQL> oradebug dumpvar sga kcsgscn_ kcslf kcsgscn_ [700000000019B70, 700000000019BA0) = 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 07000000 00019850 SQL> oradebug poke 0x700000000019B70 8 32581432072 BEFORE: [700000000019B70, 700000000019B78) = 00000000 00000000 AFTER: [700000000019B70, 700000000019B78) = 00000007 96013308 SQL> oradebug dumpvar sga kcsgscn_ kcslf kcsgscn_ [700000000019B70, 700000000019BA0) = 00000007 96013308 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 07000000 00019850 SQL> alter database open; alter database open * ERROR at line 1: ORA-00399: corrupt change description in redo log ORA-00353: log corruption near block 3 change 32581427074 time 08/25/2020 11:39:04 ORA-00312: online log 5 thread 1: '/oradata/ODSDB/datafile/redo05.log'`

看起来有些麻烦，根据报错推断之前的resetlogs其实都没有完全成功。  
此时查询各个checkpoint\_change\#都是一致的，正常应该可以open成功：

`select distinct checkpoint_change# from v$database; select distinct checkpoint_change# from v$datafile; select distinct checkpoint_change# from v$datafile_header;`

可事实上，即使尝试read only开库都会报错ORA-16433：

`SQL> alter database open read only; alter database open read only * ERROR at line 1: ORA-16433: The database must be opened in read/write mode.`

查了下这个错误，看起来控制文件有些问题，于是想重建下控制文件，结果发现命令同样报错ORA-16433：

`--recreate controlfile alter database backup controlfile to trace; SQL> alter database backup controlfile to trace; alter database backup controlfile to trace * ERROR at line 1: ORA-16433: The database must be opened in read/write mode.`

而正常mount下，是可以执行此命令的。  
没办法，只能根据控制文件的语法，查询必要信息，然后手工构建控制文件的创建脚本：

`--dbname ODSDB --select userenv('language') from dual; AMERICAN_AMERICA.AL32UTF8 --nomount STARTUP NOMOUNT --create_controlfile.sql CREATE CONTROLFILE REUSE DATABASE "ODSDB" NORESETLOGS NOARCHIVELOG MAXLOGFILES 16 MAXLOGMEMBERS 3 MAXDATAFILES 1024 MAXINSTANCES 8 MAXLOGHISTORY 292 LOGFILE GROUP 1 '/oradata/ODSDB/datafile/redo01.log' size 1024M blocksize 512, GROUP 2 '/oradata/ODSDB/datafile/redo02.log' size 1024M blocksize 512, GROUP 3 '/oradata/ODSDB/datafile/redo03.log' size 1024M blocksize 512, GROUP 4 '/oradata/ODSDB/datafile/redo04.log' size 1024M blocksize 512, GROUP 5 '/oradata/ODSDB/datafile/redo05.log' size 1024M blocksize 512, GROUP 6 '/oradata/ODSDB/datafile/redo06.log' size 1024M blocksize 512 -- STANDBY LOGFILE DATAFILE '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-SYSTEM_FNO-1_1bujd4ob.dbf', '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-SYSAUX_FNO-2_1aujd4oa.dbf', '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-ODS_FDM_P11_FNO-3_0fujd0al.dbf', '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-USERS_FNO-4_30ujd66a.dbf', ..此处省略大量数据文件输出.. '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-ODS_FDM_FNO-89_08ujcris1.dbf', '/oradata/ODSDB/datafile/data_D-ODSDB_I-3532120983_TS-ODS_FDM_FNO-00_08ujcg7n.dbf' CHARACTER SET AL32UTF8 ;`

重建控制文件后,再次推SCN，最终恢复成功：

`select 7*power(2,32)+2616661492 from dual; 32681432564 --recover again.. conn /as sysdba startup nomount; @create_controlfile.sql oradebug setmypid oradebug dumpvar sga kcsgscn_ oradebug poke 0x700000000019B70 8 32681432564 oradebug dumpvar sga kcsgscn_ recover database using backup controlfile until cancel; auto alter database open resetlogs;`

最后将隐藏参数"\_allow\_resetlogs\_corruption"设置为false，正常重启数据库正常：

`alter system set "_allow_resetlogs_corruption" = false scope=spfile; shut immediate startup`

总结：主要还是推进SCN，只是这次遇到报错ORA-16433需要重建控制文件。