【BBED】BBED模擬並修復ORA-08102錯誤

時間  2019-11-06
標籤 BBED bbed 模擬 修復 ora 錯誤 简体版
原文   原文鏈接

【BBED】BBED模擬並修復ORA-08102錯誤html

 

1.1  BLOG文檔結構圖

wpsFA64.tmp 

 

1.2  前言部分

1.2.1  導讀和注意事項

各位技術愛好者，看完本文後，你能夠掌握以下的技能，也能夠學到一些其它你所不知道的知識，~O(∩_∩)O~：面試

① 使用BBED修復ORA-08102錯誤（重點）sql

② BBED的使用數據庫

③ 數據塊格式的dump文件解釋bootstrap

④ ORA-08102錯誤的trace文件解釋微信

⑤ 從rdba獲取ROWID信息網絡

⑥ 其它實用技能session

 

Tips：oracle

① 本文在itpub（http://blog.itpub.net/26736162）、博客園(http://www.cnblogs.com/lhrbest)和微信公衆號（xiaomaimiaolhr）上有同步更新。app

② 文章中用到的全部代碼、相關軟件、相關資料及本文的pdf版本都請前往小麥苗的雲盤下載，小麥苗的雲盤地址見：http://blog.itpub.net/26736162/viewspace-1624453/。

③ 若網頁文章代碼格式有錯亂，請下載pdf格式的文檔來閱讀。

④ 在本篇BLOG中，代碼輸出部分通常放在一行一列的表格中。

⑤ 本文適合於Oracle初中級人員閱讀，Oracle大師請略過本文。

⑥ 不喜勿噴。

本文若有錯誤或不完善的地方請你們多多指正，您的批評指正是我寫做的最大動力。

1.3  本文簡介

這幾天一個朋友問我有關ORA-08102的錯誤，並且是關於OBJ$表上的I_OBJ4索引。這些系統對象的索引，不能採用重建或設置事件的方式來修復該錯誤。模模糊糊的記得很早之前看過使用BBED的方式來修復該錯誤，只是已經記不清了。正好，趁此機會把該錯誤再模擬的復現一下，也把bbed再熟悉一下吧。

朋友發給個人參考文章也是大師惜分飛的博客地址，大體看了一下過程，主要是找到索引塊的相關地址，而後利用bbed把鍵值修改的和表中存儲的一致便可。仍是那句話，「紙上得來終覺淺，絕知此事要躬行。」，本身模擬實驗，這個過程是必須的。

廢話很少說，開始實驗吧。

1.3.1  相關文章連接

閱讀本篇文章，請先閱讀如下內容：

1. Oracle 中 Object_iD 和 Data_Object_ID 的區別：http://blog.itpub.net/26736162/viewspace-2145230/

2. Oracle的dump函數：http://blog.itpub.net/26736162/viewspace-2145228/

3. BBED的幾篇文章：

① 【BBED】編譯及基本命令(1)：http://blog.itpub.net/26736162/viewspace-2075216/

② 【BBED】丟失歸檔文件狀況下的恢復：http://blog.itpub.net/26736162/viewspace-2079337/

③ 【BBED】 sys.bootstrap$ 對象的恢復：http://blog.itpub.net/26736162/viewspace-2083621/

④ 【BBED】 SYSTEM文件頭損壞的恢復(4)：http://blog.itpub.net/26736162/viewspace-2084329/

⑤ 【BBED】bbed經常使用命令：http://blog.itpub.net/26736162/viewspace-2123465/

 

 

1.4  注意事項

一、bbed畢竟是未公開的恢復方式，因此不熟悉的朋友要慎用。

二、startup force慎用

三、操做bbed以前最好先把數據庫關閉

 

1.5  相關知識點掃盲

An ORA-08102 indicates that there is a mismatch between the key(s) stored in the index and the values stored in the table.What typically happens in the index is built and at some future time,some type of corruption occurs,either in the table or index,to cause the mismatch.

ORA-08102常見於索引鍵值與表上存的值不一致。

[oracle@rhel6lhr ~]$ oerr ora 8102

08102, 00000, "index key not found, obj# %s, file %s, block %s (%s)"

// *Cause:  Internal error: possible inconsistency in index

// *Action:  Send trace file to your customer support representative, along

//           with information on reproducing the error

 

 

ora-08102這種錯誤說明索引或表出現了數據不一致，索引上記錄的鍵值和表裏的數據不一致，引發訪問失敗，通常重建下索引就能夠解決。兩邊不一致改表和索引都能達到目的，只要一致便可，但有一個原則就是索引鍵值始終要保證按順序遞增。一般有三種狀況：

1.若是損壞爲索引，則刪除索引並重建索引，但對於index的obj#小於56的狀況，因爲是核心的bootstrap$對象，index是在DB啓動時由DB自動建立，此種狀況下經過設置event 38003或startup migrate模式都不能解決，但obj#>56的則能夠。

2.若是損壞爲塊級別，則採用壞塊的處理方法

3.若是損壞的爲表的記錄級別的則採用bbed或其它工具

 

I_OBJ1、I_OBJ2、I_OBJ3、I_OBJ4、I_OBJ5這幾個都是OBJ$基表的索引，若是損壞會很是麻煩，由於ORACLE 對這些對象的DDL作了嚴格限制，沒有辦法簡單修復它們。

wpsFA75.tmp 

 

SYS@ora11g > drop index i_obj4;

drop index i_obj5

           *

ERROR at line 1:

ORA-00701: object necessary for warmstarting database cannot be altered

 

 

---------------------------------------------------------------------

第二章 實驗部分

2.1  實驗環境介紹

項目

source db

db 類型

單機

db version

11.2.0.3.0

db 存儲

FS

OS版本及kernel版本

RHEL 6.5

 

2.2  實驗目標

實驗目標：使用BBED模擬並修復ORA-08102錯誤。

模擬錯誤過程：經過bbed修改OBJ$表中DATAOBJ#列最大的行所在的塊，讓DATAOBJ#的值增大，從而和索引中記錄的值不一致。重啓數據庫並建立表讓數據庫報出ORA-08102錯誤。

修復錯誤過程：經過bbed把表中或索引中的不一致的數據修改爲一致的，從而修復ORA-08102錯誤。

2.3  實驗過程

2.3.1  作全備

[oracle@rhel6lhr ~]$ more rman_full.sh

rman target / nocatalog <<eof< span="">

run{

backup database format '/home/oracle/bak/%d_%U.full';

sql 'alter system archive log current';

backup archivelog all format '/home/oracle/bak/%d_%U.arc';

backup current controlfile format '/home/oracle/bak/%d_%U.ctl';

}

EOF

 

[oracle@rhel6lhr ~]$ sh rman_full.sh

 

Recovery Manager: Release 11.2.0.3.0 - Production on Wed Sep 20 13:56:41 2017

 

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

 

connected to target database: ORA11G (DBID=4270446895)

using target database control file instead of recovery catalog

 

RMAN> 2> 3> 4> 5> 6>

Starting backup at 2017-09-20 13:56:41

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=21 device type=DISK

channel ORA_DISK_1: starting full datafile backup set

channel ORA_DISK_1: specifying datafile(s) in backup set

input datafile file number=00004 name=/u01/app/oracle/oradata/ora11g/users01.dbf

input datafile file number=00001 name=/u01/app/oracle/oradata/ora11g/system01.dbf

input datafile file number=00002 name=/u01/app/oracle/oradata/ora11g/sysaux01.dbf

input datafile file number=00005 name=/u01/app/oracle/oradata/ora11g/example01.dbf

input datafile file number=00003 name=/u01/app/oracle/oradata/ora11g/undotbs01.dbf

input datafile file number=00022 name=/u01/app/oracle/oradata/ora11g/ts_ogg01.dbf

input datafile file number=00007 name=/u01/app/oracle/oradata/ora11g/DWII_CNY_BK_F_01.dbf

input datafile file number=00008 name=/u01/app/oracle/oradata/ora11g/DWII_DPA_F_01.dbf

input datafile file number=00009 name=/u01/app/oracle/oradata/ora11g/DWII_DPA_I_01.dbf

input datafile file number=00010 name=/u01/app/oracle/oradata/ora11g/DWII_DPA_S_01.dbf

input datafile file number=00011 name=/u01/app/oracle/oradata/ora11g/DWII_SOR_F_01.dbf

input datafile file number=00012 name=/u01/app/oracle/oradata/ora11g/DWII_SOR_I_01.dbf

input datafile file number=00013 name=/u01/app/oracle/oradata/ora11g/DW_USER.dbf

input datafile file number=00014 name=/u01/app/oracle/oradata/ora11g/SQCHECK.dbf

input datafile file number=00015 name=/u01/app/oracle/oradata/ora11g/SD_CNY_D_01.dbf

input datafile file number=00016 name=/u01/app/oracle/oradata/ora11g/SD_CNY_F_01.dbf

input datafile file number=00017 name=/u01/app/oracle/oradata/ora11g/SD_DPA_D_01.dbf

input datafile file number=00018 name=/u01/app/oracle/oradata/ora11g/SD_DPA_F_01.dbf

input datafile file number=00019 name=/u01/app/oracle/oradata/ora11g/SD_SORT_T_01.dbf

input datafile file number=00020 name=/u01/app/oracle/oradata/ora11g/DWII_FXDM_F_01.dbf

input datafile file number=00021 name=/u01/app/oracle/oradata/ora11g/SD_SOR_T_01.dbf

input datafile file number=00006 name=/u01/app/oracle/oradata/ora11g/aa.dbf

input datafile file number=00023 name=/u01/app/oracle/oradata/ora11g/test01.dbf

channel ORA_DISK_1: starting piece 1 at 2017-09-20 13:56:42

channel ORA_DISK_1: finished piece 1 at 2017-09-20 13:59:17

piece handle=/home/oracle/bak/ORA11G_27seuekq_1_1.full tag=TAG20170920T135642 comment=NONE

channel ORA_DISK_1: backup set complete, elapsed time: 00:02:35

Finished backup at 2017-09-20 13:59:17

 

Starting Control File and SPFILE Autobackup at 2017-09-20 13:59:17

piece handle=/u05/app/oracle/flash_recovery_area/ORA11G/autobackup/2017_09_20/o1_mf_s_955202357_dw40xohn_.bkp comment=NONE

Finished Control File and SPFILE Autobackup at 2017-09-20 13:59:18

 

sql statement: alter system archive log current

 

Starting backup at 2017-09-20 13:59:18

current log archived

using channel ORA_DISK_1

channel ORA_DISK_1: starting archived log backup set

channel ORA_DISK_1: specifying archived log(s) in backup set

input archived log thread=1 sequence=302 RECID=304 STAMP=955202163

input archived log thread=1 sequence=303 RECID=305 STAMP=955202358

input archived log thread=1 sequence=304 RECID=306 STAMP=955202358

channel ORA_DISK_1: starting piece 1 at 2017-09-20 13:59:18

channel ORA_DISK_1: finished piece 1 at 2017-09-20 13:59:19

piece handle=/home/oracle/bak/ORA11G_29seuepm_1_1.arc tag=TAG20170920T135918 comment=NONE

channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01

Finished backup at 2017-09-20 13:59:19

 

Starting backup at 2017-09-20 13:59:20

using channel ORA_DISK_1

channel ORA_DISK_1: starting full datafile backup set

channel ORA_DISK_1: specifying datafile(s) in backup set

including current control file in backup set

channel ORA_DISK_1: starting piece 1 at 2017-09-20 13:59:21

channel ORA_DISK_1: finished piece 1 at 2017-09-20 13:59:22

piece handle=/home/oracle/bak/ORA11G_2aseuepo_1_1.ctl tag=TAG20170920T135920 comment=NONE

channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01

Finished backup at 2017-09-20 13:59:22

 

Starting Control File and SPFILE Autobackup at 2017-09-20 13:59:22

piece handle=/u05/app/oracle/flash_recovery_area/ORA11G/autobackup/2017_09_20/o1_mf_s_955202362_dw40xtf0_.bkp comment=NONE

Finished Control File and SPFILE Autobackup at 2017-09-20 13:59:23

 

RMAN>

 

Recovery Manager complete.

 

 

 

2.3.2  模擬一：BBED模擬ORA-08102錯誤

經過BBED修改OBJ$中DATAOBJ$重現I_OBJ4索引報ORA-08102錯誤。定位須要破壞的OBJ$上DATAOBJ$列最大的記錄，使之和索引I_OBJ4中記錄不一致，從而實現ORA-8102錯誤。

[oracle@rhel6lhr ~]$ ORACLE_SID=ora11g

[oracle@rhel6lhr ~]$ sqlplus / as sysdba

 

SQL*Plus: Release 11.2.0.3.0 Production on Thu Sep 21 09:24:08 2017

 

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

 

 

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

 

SYS@ora11g > select object_id,object_type from dba_objects where object_name='I_OBJ4';

 

OBJECT_ID OBJECT_TYPE

---------- -------------------

        39 INDEX

 

SYS@ora11g > select max(DATAOBJ#) from obj$;

 

MAX(DATAOBJ#)

-------------

        94098

 

SYS@ora11g > select dump(94098,16) from dual;

 

DUMP(94098,16)

-----------------------

Typ=2 Len=4: c3,a,29,63 ===>>>>> Typ=2表示NUMBER，96表示CHAR。Len=4表示4位長度，因此，94098在數據庫內部的存儲格式爲04c30a2963

 

 

SYS@ora11g > SELECT DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID) FILE#,

  2         DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID) BLOCK#,

  3         DBMS_ROWID.ROWID_ROW_NUMBER(ROWID) ROW#

  4    FROM OBJ$

  5   WHERE DATAOBJ# = 94098;

 

     FILE#     BLOCK#       ROW#

---------- ---------- ----------

         1        241         27

 

SYS@ora11g > SELECT COUNT(*) COUNTS,

  2         MAX(DBMS_ROWID.ROWID_ROW_NUMBER(ROWID)) MAX_ROWNUM,

  3         MIN(DBMS_ROWID.ROWID_ROW_NUMBER(ROWID)) MIN_ROWNUM

  4    FROM SYS.OBJ$ D

  5   WHERE DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID) = 1

  6     AND DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID) = 241;

 

    COUNTS MAX_ROWNUM MIN_ROWNUM

---------- ---------- ----------

       105        104          0

 

 

根據以上的SQL能夠獲得下表的內容：

項目

值

OBJ$上DATAOBJ#列的最大值

94098

OBJ$上DATAOBJ#列的最大值dump值

Typ=2 Len=4: c3,a,29,63  即：04c30a2963

該行所在數據塊的地址

     FILE#     BLOCK#       ROW#

---------- ---------- ----------

         1        241         27

該行的存儲狀況

    COUNTS MAX_ROWNUM MIN_ROWNUM

---------- ---------- ----------

       105        104          0

即：OBJ$表上DATAOBJ#列的最大值爲94098，該值在Oracle數據庫中的存儲格式爲04c30a2963，該行數據所在的塊爲1號文件，241號塊，第27行，該塊上共有105行數據，最大值的行號爲104，最小值的行號爲0。

 

2.3.2.1  dump文件解析

先對1號文件，241號塊作dump：

SYS@ora11g >  conn / as sysdba

Connected.

SYS@ora11g >  alter system dump datafile 1  block 241;

 

System altered.

 

SYS@ora11g > select value from v$diag_info where name='Default Trace File';

 

VALUE

--------------------------------------------------------------------------------

/u01/app/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_28221.trc

 

 

 

wpsFA76.tmp

關於塊格式的詳細介紹請參考：http://blog.itpub.net/26736162/viewspace-2141499/

Start dump data blocks tsn: 0 file#:1 minblk 241 maxblk 241  ====>>>>> SYSTEM是0號表空間1號文件，當前塊是241號

Block dump from cache:====>>>>> 從內存中dump出來的

Dump of buffer cache at level 4 for tsn=0 rdba=4194545====>>>>> cache中的位置

BH (0x6cfe2658) file#: 1 rdba: 0x004000f1 (1/241) class: 1 ba: 0x6cd1a000====>>>>> 參考連接地址

  set: 5 pool: 3 bsz: 8192 bsi: 0 sflg: 1 pwc: 0,25

  dbwrid: 0 obj: 18 objn: 18 tsn: 0 afn: 1 hint: f

  hash: [0x773fca58,0x773fca58] lru: [0x6dbedcf0,0x6bbf1e40]

  lru-flags: hot_buffer

  ckptq: [NULL] fileq: [NULL] objq: [0x6e7d8388,0x6d7e82d8] objaq: [0x6d3f0588,0x6d7e82e8]

  st: XCURRENT md: NULL fpin: 'kdswh05: kdsgrp' tch: 11

  flags:

  LRBA: [0x0.0.0] LSCN: [0x0.0] HSCN: [0xffff.ffffffff] HSUB: [65535]

Block dump from disk: ====>>>>> 參考連接地址

buffer tsn: 0 rdba: 0x004000f1 (1/241)

scn: 0x0000.038f7e74 seq: 0x01 flg: 0x06 tail: 0x7e740601

frmt: 0x02 chkval: 0xc3cc type: 0x06=trans data

Hex dump of block: st=0, typ_found=1

Dump of memory from 0x00007F1583F05A00 to 0x00007F1583F07A00

7F1583F05A00 0000A206 004000F1 038F7E74 06010000  [......@.t~......]

7F1583F05A10 0000C3CC 00000001 00000012 038F7E73  [............s~..]

7F1583F05A20 00000000 0002F801 00000000 00190006  [................]

7F1583F05A30 00000BF4 00C002D5 00030203 00002001  [............. ..]

7F1583F05A40 038F7E74 00690100 00E4FFFF 035F013B  [t~....i.....;._.]

...........省略部分輸出................

7F1583F079C0 0215C102 800103C1 4F434905 C102244C  [.........ICOL$..]

7F1583F079D0 C102FF02 6F780703 2F0A1109 6F78070E  [......xo.../..xo]

7F1583F079E0 3B0A1109 6F780701 2F0A1109 02C1020E  [...;..xo.../....]

7F1583F079F0 8001FFFF 028001FF 800102C1 7E740601  [..............t~]

Block header dump:  0x004000f1 ====>>>>> 參考連接地址

Object id on Block? Y

seg/obj: 0x12  csc: 0x00.38f7e73  itc: 1  flg: -  typ: 1 - DATA

     fsl: 0  fnx: 0x0 ver: 0x01

 

Itl           Xid                  Uba         Flag  Lck        Scn/Fsc

0x01   0x0006.019.00000bf4  0x00c002d5.0203.03  --U-    1  fsc 0x0000.038f7e74

bdba: 0x004000f1

data_block_dump,data header at 0x7f1583f05a44

===============

tsiz: 0x1fb8

hsiz: 0xe4

pbl: 0x7f1583f05a44

     76543210

flag=--------

ntab=1

nrow=105 ====>>>>> 共105行數據

frre=-1

fsbo=0xe4

fseo=0x13b

avsp=0x35f

tosp=0x35f

0xe:pti[0]nrow=105offs=0

0x12:pri[0]offs=0x1f79

0x14:pri[1]offs=0x1f36

...........省略部分輸出................

0x44:pri[25]offs=0x18ff

0x46:pri[26]offs=0x18c1

0x48:pri[27]offs=0x13b====>>>>> 第27行數據的指針偏移位置是13b，轉換爲10進制是315，selet to_number('13b','xxx') from dual;

...........省略部分輸出................

0xde:pri[102]offs=0x515

0xe0:pri[103]offs=0x4ce

0xe2:pri[104]offs=0x48b

block_row_dump:

tab 0, row 0, @0x1f79

tl: 63 fb: --H-FL-- lb: 0x0  cc: 18

col  0: [ 2]  c1 15

col  1: [ 2]  c1 03

col  2: [ 1]  80

col  3: [ 5]  49 43 4f 4c 24

col  4: [ 2]  c1 02

col  5: *NULL*

col  6: [ 2]  c1 03

col  7: [ 7]  78 6f 09 11 0a 2f 0e

col  8: [ 7]  78 6f 09 11 0a 3b 01

col  9: [ 7]  78 6f 09 11 0a 2f 0e

col 10: [ 2]  c1 02

col 11: *NULL*

col 12: *NULL*

col 13: [ 1]  80

col 14: *NULL*

col 15: [ 1]  80

col 16: [ 2]  c1 02

col 17: [ 1]  80

...........省略部分輸出................

tab 0, row 27, @0x13b ====>>>>> 該塊中第一個表第27行的指針位置，轉換爲10進制是315

tl: 72 fb: --H-FL-- lb: 0x1  cc: 18

col  0: [ 2]  c1 02

col  1: [ 4]  c3 0a 29 63

col  2: [ 1]  80

col  3: [12]  5f 4e 45 58 54 5f 4f 42 4a 45 43 54

col  4: [ 2]  c1 02

col  5: *NULL*

col  6: [ 1]  80

col  7: [ 7]  78 6f 09 11 0a 2f 0e

col  8: [ 7]  78 75 09 14 13 1d 25

col  9: [ 7]  78 6f 09 11 0a 2f 0e

col 10: [ 1]  80

col 11: *NULL*

col 12: *NULL*

col 13: [ 1]  80

col 14: *NULL*

col 15: [ 1]  80

col 16: [ 4]  c3 07 38 24

col 17: [ 1]  80

...........省略部分輸出................

tab 0, row 104, @0x48b

tl: 67 fb: --H-FL-- lb: 0x0  cc: 18

col  0: [ 3]  c2 02 06

col  1: [ 3]  c2 02 06

col  2: [ 1]  80

col  3: [ 7]  41 43 43 45 53 53 24

col  4: [ 2]  c1 02

col  5: *NULL*

col  6: [ 2]  c1 03

col  7: [ 7]  78 6f 09 11 0a 2f 10

col  8: [ 7]  78 6f 09 11 0a 2f 10

col  9: [ 7]  78 6f 09 11 0a 2f 10

col 10: [ 2]  c1 02

col 11: *NULL*

col 12: *NULL*

col 13: [ 1]  80

col 14: *NULL*

col 15: [ 1]  80

col 16: [ 2]  c1 02

col 17: [ 1]  80

end_of_block_dump

End dump data blocks tsn: 0 file#: 1 minblk 241 maxblk 241

 

 

 

因爲SYS.OBJ$表共21列，可是最後3列都爲空，因此，dump文件裏就沒有顯示出來。將該行數據以16進制dump出來看看：

SELECT DUMP(OBJ#, 16),

       DUMP(DATAOBJ#, 16),

       DUMP(OWNER#, 16),

       DUMP(NAME, 16),

       DUMP(NAMESPACE, 16),

       DUMP(SUBNAME, 16),

       DUMP(TYPE#, 16),

       DUMP(CTIME, 16),

       DUMP(MTIME, 16),

       DUMP(STIME, 16),

       DUMP(STATUS, 16),

       DUMP(REMOTEOWNER, 16),

       DUMP(LINKNAME, 16),

       DUMP(FLAGS, 16),

       DUMP(OID$, 16),

       DUMP(SPARE1, 16),

       DUMP(SPARE2, 16),

       DUMP(SPARE3, 16),

       DUMP(SPARE4, 16),

       DUMP(SPARE5, 16),

       DUMP(SPARE6, 16)

  FROM SYS.OBJ$ D

WHERE DATAOBJ# = 94098;

 

wpsFA86.tmp 

結果和dump文件中的內容一致。

列名

10進制值

16進制值

dump文件的存儲

OBJ#

1

Typ=2 Len=2: c1,2

col  0: [ 2]  c1 02

DATAOBJ#

94098

Typ=2 Len=4: c3,a,29,63

col  1: [ 4]  c3 0a 29 63

OWNER#

0

Typ=2 Len=1: 80

col  2: [ 1]  80

NAME

_NEXT_OBJECT

Typ=1 Len=12: 5f,4e,45,58,54,5f,4f,42,4a,45,43,54

col  3: [12]  5f 4e 45 58 54 5f 4f 42 4a 45 43 54

NAMESPACE

1

Typ=2 Len=2: c1,2

col  4: [ 2]  c1 02

SUBNAME

 

NULL

col  5: *NULL*

TYPE#

0

Typ=2 Len=1: 80

col  6: [ 1]  80

CTIME

2011-09-17 09:46:13

Typ=12 Len=7: 78,6f,9,11,a,2f,e

col  7: [ 7]  78 6f 09 11 0a 2f 0e

MTIME

2017-09-20 18:28:36

Typ=12 Len=7: 78,75,9,14,13,1d,25

col  8: [ 7]  78 75 09 14 13 1d 25

STIME

2011-09-17 09:46:13

Typ=12 Len=7: 78,6f,9,11,a,2f,e

col  9: [ 7]  78 6f 09 11 0a 2f 0e

STATUS

0

Typ=2 Len=1: 80

col 10: [ 1]  80

REMOTEOWNER

 

NULL

col 11: *NULL*

LINKNAME

 

NULL

col 12: *NULL*

FLAGS

0

Typ=2 Len=1: 80

col 13: [ 1]  80

OID$

 

NULL

col 14: *NULL*

SPARE1

0

Typ=2 Len=1: 80

col 15: [ 1]  80

SPARE2

65535

Typ=2 Len=4: c3,7,38,24

col 16: [ 4]  c3 07 38 24

SPARE3

0

Typ=2 Len=1: 80

col 17: [ 1]  80

 

因此，從dump文件中還能夠獲得第27行數據的指針偏移位置是13b，轉換爲10進制是315。

 

2.3.2.2  使用bbed破壞該塊中的第27行數據

使用bbed破壞記錄，修改dataobj#中的值，使得obj$.dataobj#和i_obj4中的dataobj#不匹配。

SYS@ora11g > select name from v$datafile where file#=1;

 

NAME

--------------------------------------------------------------------------------

/u01/app/oracle/oradata/ora11g/system01.dbf

 

最好是乾淨的關閉數據庫

 

 

 

[oracle@rhel6lhr ~]$ bbed password=blockedit blocksize=8192 mode=edit filename='/u01/app/oracle/oradata/ora11g/system01.dbf'

 

BBED: Release 2.0.0.0.0 - Limited Production on Thu Sep 21 10:40:47 2017

 

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

 

************* !!! For Oracle Internal Use only !!! ***************

 

BBED> show all

        FILE#           0

        BLOCK#          1

        OFFSET          0

        DBA             0x00000000 (0 0,1)

        FILENAME        /u01/app/oracle/oradata/ora11g/system01.dbf

        BIFILE          bifile.bbd

        LISTFILE      

        BLOCKSIZE       8192

        MODE            Edit

        EDIT            Unrecoverable

        IBASE           Dec

        OBASE           Dec

        WIDTH           80

        COUNT           512

        LOGFILE         ./log.bbd

        SPOOL           No

 

BBED> set block 241

        BLOCK#          241

 

BBED> map

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 241                                   Dba:0x00000000

------------------------------------------------------------

KTB Data Block (Table/Cluster) ====>>>>> 代表是數據塊

 

struct kcbh, 20 bytes                      @0      

 

struct ktbbh, 48 bytes                     @20     

 

struct kdbh, 14 bytes                      @68     

 

struct kdbt[1], 4 bytes                    @82     

 

sb2 kdbr[105]                              @86     

 

ub1 freespace[87]                          @296    

 

ub1 rowdata[7805]                          @383    

 

ub4 tailchk                                @8188    ====>>>>> 塊校驗位

 

BBED> p kdbr===>>>>> 塊中數據指針位置

sb2 kdbr[0]                                 @86       8057

sb2 kdbr[1]                                 @88       7990

sb2 kdbr[2]                                 @90       7928

。。。。。。。。。。。省略。。。。。。。。。。。

sb2 kdbr[24]                                @134      6466

sb2 kdbr[25]                                @136      6399

sb2 kdbr[26]                                @138      6337

sb2 kdbr[27]                                @140      315===>>>>> 第27行數據指針位置爲315，和dump出來的信息一致

sb2 kdbr[28]                                @142      6268

sb2 kdbr[29]                                @144      6201

。。。。。。。。。。。省略。。。。。。。。。。。

sb2 kdbr[103]                               @292      1230

sb2 kdbr[104]                               @294      1163===>>>>> 代表該塊共有105行數據

 

BBED> p *kdbr[27]

rowdata[0]

----------

ub1 rowdata[0]                              @383      0x2c===>>>>> 第27行偏移位置爲383

 

BBED> show offset

        OFFSET          383

 

BBED> x /rnnncncntttnccncnnn===>>>>> 打印第27行的數據內容，n表明number，c表明char，t表明date

rowdata[0]                                  @383    

----------

flag@383:  0x2c (KDRHFL, KDRHFF, KDRHFH)

lock@384:  0x01

cols@385:    18===>>>>> 共18列

 

col    0[2] @386: 1

col    1[4] @389: 94098 ==>>>>> 須要修改該列的值

col    2[1] @394: 0

col   3[12] @396: _NEXT_OBJECT

col    4[2] @409: 1

col    5[0] @412: *NULL*

col    6[1] @413: 0

col    7[7] @415: 2011-09-17 09:46:13

col    8[7] @423: 2017-09-20 18:28:36

col    9[7] @431: 2011-09-17 09:46:13

col   10[1] @439: 0

col   11[0] @441: *NULL*

col   12[0] @442: *NULL*

col   13[1] @443: 0

col   14[0] @445: *NULL*

col   15[1] @446: 0

col   16[4] @448: 65535

col   17[1] @453: 0

 

BBED> set offset 389

        OFFSET          389

 

BBED> d /v count 32

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 241     Offsets:  389 to  420  Dba:0x00000000

-------------------------------------------------------

 04c30a29 6301800c 5f4e4558 545f4f42 l ...)c..._NEXT_OB

4a454354 02c102ff 01800778 6f09110a l JECT.......xo...

 

<16 bytes="" per="" line="">

 

BBED>

 

 

 

 

固然，也可使用find來直接查詢：

BBED> f /x c30a29

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 241              Offsets:  390 to  421           Dba:0x00000000

------------------------------------------------------------------------

 c30a2963 01800c5f 4e455854 5f4f424a 45435402 c102ff01 8007786f 09110a2f

 

<32 bytes="" per="" line="">

 

BBED> f

BBED-00212: search string not found

 

 

 

94098和94099對應的存儲格式：

SYS@ora11g > select dump(94098,16),dump(94099,16) from dual;

 

DUMP(94098,16)          DUMP(94099,16)

----------------------- -----------------------

Typ=2 Len=4: c3,a,29,63 Typ=2 Len=4: c3,a,29,64

 

 

 

使用bbed 修改04c30a2963爲04c30a2964，即把94098修改成94099，以下所示：

BBED> set offset +2

        OFFSET          392

 

BBED> d

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 241              Offsets:  392 to  423           Dba:0x00000000

------------------------------------------------------------------------

 29630180 0c5f4e45 58545f4f 424a4543 5402c102 ff018007 786f0911 0a2f0e07

 

<32 bytes="" per="" line="">

 

BBED>  m /x 2964

Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) Y

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 241              Offsets:  392 to  423           Dba:0x00000000

------------------------------------------------------------------------

 29640180 0c5f4e45 58545f4f 424a4543 5402c102 ff018007 786f0911 0a2f0e07

 

<32 bytes="" per="" line="">

 

BBED> d /v

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 241     Offsets:  392 to  423  Dba:0x00000000

-------------------------------------------------------

29640180 0c5f4e45 58545f4f 424a4543 l )d..._NEXT_OBJEC

5402c102 ff018007 786f0911 0a2f0e07 l T.......xo.../..

 

<16 bytes="" per="" line="">

 

BBED> sum

Check value for File 0, Block 241:

current = 0xc3cc, required = 0xc4cc

 

BBED> sum apply

Check value for File 0, Block 241:

current = 0xc4cc, required = 0xc4cc

 

BBED> v

DBVERIFY - Verification starting

FILE = /u01/app/oracle/oradata/ora11g/system01.dbf

BLOCK = 241

 

 

DBVERIFY - Verification complete

 

Total Blocks Examined         : 1

Total Blocks Processed (Data) : 1

Total Blocks Failing   (Data) : 0

Total Blocks Processed (Index): 0

Total Blocks Failing   (Index): 0

Total Blocks Empty            : 0

Total Blocks Marked Corrupt   : 0

Total Blocks Influx           : 0

Message 531 not found;  product=RDBMS; facility=BBED

 

 

修改後查看該行記錄的內容：

BBED> set offset 383

        OFFSET          383

 

BBED> x /rnnncncntttnccncnnn

rowdata[0]                                  @383    

----------

flag@383:  0x2c (KDRHFL, KDRHFF, KDRHFH)

lock@384:  0x01

cols@385:    18

 

col    0[2] @386: 1

col    1[4] @389: 94099 ==>>>>> 已修改

col    2[1] @394: 0

col   3[12] @396: _NEXT_OBJECT

col    4[2] @409: 1

col    5[0] @412: *NULL*

col    6[1] @413: 0

col    7[7] @415: 2011-09-17 09:46:13

col    8[7] @423: 2017-09-20 18:28:36

col    9[7] @431: 2011-09-17 09:46:13

col   10[1] @439: 0

col   11[0] @441: *NULL*

col   12[0] @442: *NULL*

col   13[1] @443: 0

col   14[0] @445: *NULL*

col   15[1] @446: 0

col   16[4] @448: 65535

col   17[1] @453: 0

 

能夠看到成功的將94098修改成94099。

 

2.3.2.3  重啓數據庫

重如今obj$的I_OBJ4 index上報ORA-8102錯誤,並且不能建立新對象。

SYS@ora11g > create table test_8102_lhr as select * from dba_users;

 

Table created.==>>>>> 須要重啓數據庫

 

SYS@ora11g > startup force

ORACLE instance started.

 

Total System Global Area  409194496 bytes

Fixed Size                  2228864 bytes

Variable Size             306187648 bytes

Database Buffers           92274688 bytes

Redo Buffers                8503296 bytes

Database mounted.

Database opened.

SYS@ora11g >

SYS@ora11g > create table test_8102_lhr_01 as select * from dba_users;

create table test_8102_lhr_01 as select * from dba_users

                                               *

ERROR at line 1:

ORA-00604: error occurred at recursive SQL level 1

ORA-08102: index key not found, obj# 39, file 1, block 94083 (2)

 

SYS@ora11g > col OBJECT_NAME for a30

SYS@ora11g > select object_name,object_type from dba_objects where object_id=39;

 

OBJECT_NAME                    OBJECT_TYPE

------------------------------ -------------------

I_OBJ4                         INDEX

 

==>>>>>39號爲I_OBJ4這個索引，在塊94093上沒有找到鍵值。

 

 

 

2.3.2.4  errorstack的trace文件分析

告警日誌會生成errorstack：

wpsFA97.tmp

Thu Sep 21 10:57:39 2017

Errors in file /u01/app/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_46780.trc:

Thu Sep 21 10:57:41 2017

Dumping diagnostic data in directory=[cdmp_20170921105741], requested by (instance=1, osid=46780), summary=[abnormal process termination].

 

 

從日誌文件中能夠看到：

*** 2017-09-21 10:57:39.849

oer 8102.2 - obj# 39, rdba: 0x00416f83(afn 1, blk# 94083)<<<<<<===發生錯誤的對象爲39號對象，1號文件，94083號塊，rdba（relative data block address）表示相對數據塊地址，計算方式參考：http://blog.itpub.net/26736162/viewspace-2141499/

kdk key 8102.2:

  ncol: 4, len: 16<<<<<<===共4列，長度爲16字節

  key: (16):  04 c3 0a 29 64 01 80 01 80 06 00 40 00 f1 00 1b <<<<<<===在索引中找不到鍵值04 c3 0a 29 64（轉換爲10進制即94099），其中04表明行的長度，後面則是列的內容。因爲該索引共有3列（DATAOBJ#, TYPE#, OWNER#），因此，04 c3 0a 29 64表明DATAOBJ#，「01 80」表明TYPE#，接下來的「01 80」表明OWNER#，剩下的「06 00 40 00 f1 00 1b」表明該行的ROWID，06表明長度。索引中的ROWID=文件號（2進制前10位）+塊號（2進制22位）+行號（2進制16位）

00 40 00 f1 00 1b（16進制）= 000000000100000000000000111100010000000000011011（2進制）

文件號=（0000000001）取前10位的二進制=第1號文件

塊號=（0000000000000011110001）取前2進制22位==>第241號

行號=（0000000000011011）取2進制16位==>第27行

這個結果和以前查詢出來的結果一致。

  mask: (4096):

。。。。。。。。省略。。。。。。。。

*** 2017-09-21 10:57:39.850

dbkedDefDump(): Starting a non-incident diagnostic dump (flags=0x0, level=3, mask=0x0)

----- Error Stack Dump -----

----- Current SQL Statement for this session (sql_id=4yyb4104skrwj) -----

update obj$ set obj#=:4, type#=:5,ctime=:6,mtime=:7,stime=:8,status=:9,dataobj#=:10,flags=:11,oid$=:12,spare1=:13, spare2=:14 where owner#=:1 and name=:2 and namespace=:3 and remoteowner is null and linkname is null and subname is null

 

 

。。。。。。。。省略。。。。。。。。

 

Block header dump:  0x00416f83

Object id on Block? Y

 seg/obj: 0x27  csc: 0x00.38f9bc9  itc: 3  flg: O  typ: 2 - INDEX<<<<<<===注意：塊中可能有多個索引，因此須要使用「seg/obj: 0x27」來進行判斷，這裏0x27表示39號對象。

     fsl: 0  fnx: 0x416f84 ver: 0x01

 

Itl           Xid                  Uba         Flag  Lck        Scn/Fsc

0x01   0x0009.01f.00000f09  0x00c001f6.02d1.01  CB--    0  scn 0x0000.038326d7

0x02   0x000a.009.0000098a  0x00c0030c.01ff.14  ----    1  fsc 0x0000.00000000

0x03   0x0006.008.00000bf2  0x00c002df.0203.16  --U-    1  fsc 0x0000.038f9bdc

Leaf block dump

===============

header address 1857765492=0x6ebb4074

kdxcolev 0

KDXCOLEV Flags = - - -

kdxcolok 0

kdxcoopc 0x80: opcode=0: iot flags=--- is converted=Y

kdxconco 4

kdxcosdc 1

kdxconro 297

kdxcofbo 630=0x276

kdxcofeo 1722=0x6ba

kdxcoavs 1398

kdxlespl 0

kdxlende 0

kdxlenxt 4213578=0x404b4a

kdxleprv 4288386=0x416f82

kdxledsz 0

kdxlebksz 8008

row#0[7987] flag: ------, lock: 0, len=21

col 0; len 4; (4):  c3 0a 20 26

col 1; len 2; (2):  c1 23

col 2; len 3; (3):  c2 02 26

col 3; len 6; (6):  00 41 6a b1 00 18

。。。。。。。。省略。。。。。。。。

row#284[1861] flag: ------, lock: 0, len=18

col 0; len 4; (4):  c3 0a 29 63<<<<<<===索引中存儲的是c3 0a 29 63

col 1; len 1; (1):  80

col 2; len 1; (1):  80

col 3; len 6; (6):  00 40 00 f1 00 1b<<<<<<===索引中的ROWID

。。。。。。。。省略。。。。。。。。

row#296[2302] flag: ------, lock: 0, len=15

col 0; NULL

col 1; len 2; (2):  c1 02

col 2; len 1; (1):  80

col 3; len 6; (6):  00 40 2e 9f 00 50

----- end of leaf block dump -----

。。。。。。。。省略。。。。。。。。

 

另外經過相關trace發現，在建立表操做中會調用update obj$的一個遞歸操做，而該操做會更新dataobj#，可是因爲該值在表和index中不匹配，所以出現ORA-08102致使建立表不成功。也能夠經過以下的SQL生成errorstack：

ALTER SESSION SET EVENTS '8102 trace name errorstack level 3';

create table t1 as select * from dual;          

select value from v$diag_info where name='Default Trace File';

 

在trace中，須要從索引塊中讀取c30a2964：

LHR@ora11g > select utl_raw.cast_to_number('c30a2964') from dual;

 

UTL_RAW.CAST_TO_NUMBER('C30A2964')

----------------------------------

                             94099

 

 

 

2.3.3  模擬一：BBED修復ORA-08102錯誤

2.3.3.1  使用全表掃和全索引掃找到鍵值不一致的地方

SYS@ora11g > create table test_8102_lhr_01 as select * from dba_users;

create table test_8102_lhr_01 as select * from dba_users

                                               *

ERROR at line 1:

ORA-00604: error occurred at recursive SQL level 1

ORA-08102: index key not found, obj# 39, file 1, block 94083 (2)

 

SYS@ora11g > col OBJECT_NAME for a30

SYS@ora11g > select object_name,object_type from dba_objects where object_id=39;

 

OBJECT_NAME                    OBJECT_TYPE

------------------------------ -------------------

I_OBJ4                         INDEX

 

SYS@ora11g > set autot on

SYS@ora11g > set line 9999

SYS@ora11g >

SYS@ora11g > select /*+ index(t i_obj4) */ DATAOBJ# from sys.obj$  t 

  2  minus

  3  select /*+ full(t1) */ DATAOBJ# from sys.obj$  t1;

 

  DATAOBJ#

----------

     94098

 

 

Execution Plan

----------------------------------------------------------

Plan hash value: 1107706645

 

--------------------------------------------------------------------------------------

| Id  | Operation           | Name   | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |

--------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT    |        | 85519 |   334K|       |  1116  (47)| 00:00:14 |

|   1 |  MINUS              |        |       |       |       |            |          |

|   2 |   SORT UNIQUE NOSORT|        | 85519 |   167K|       |   603   (1)| 00:00:08 |

|   3 |    INDEX FULL SCAN  | I_OBJ4 | 85519 |   167K|       |   386   (0)| 00:00:05 |

|   4 |   SORT UNIQUE       |        | 85519 |   167K|   680K|   512   (1)| 00:00:07 |

|   5 |    TABLE ACCESS FULL| OBJ$   | 85519 |   167K|       |   295   (1)| 00:00:04 |

--------------------------------------------------------------------------------------

 

 

Statistics

----------------------------------------------------------

          0  recursive calls

          0  db block gets

       1475  consistent gets

          0  physical reads

          0  redo size

        528  bytes sent via SQL*Net to client

        520  bytes received via SQL*Net from client

          2  SQL*Net roundtrips to/from client

          1  sorts (memory)

          0  sorts (disk)

          1  rows processed

 

SYS@ora11g > select /*+ full(t1) */ DATAOBJ# from sys.obj$  t1

  2   minus

  3    select /*+ index(t i_obj4) */ DATAOBJ# from sys.obj$  t 

  4   ;

 

 

  DATAOBJ#

----------

     94099

 

 

Execution Plan

----------------------------------------------------------

Plan hash value: 321946325

 

--------------------------------------------------------------------------------------

| Id  | Operation           | Name   | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |

--------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT    |        | 85519 |   334K|       |  1116  (55)| 00:00:14 |

|   1 |  MINUS              |        |       |       |       |            |          |

|   2 |   SORT UNIQUE       |        | 85519 |   167K|   680K|   512   (1)| 00:00:07 |

|   3 |    TABLE ACCESS FULL| OBJ$   | 85519 |   167K|       |   295   (1)| 00:00:04 |

|   4 |   SORT UNIQUE NOSORT|        | 85519 |   167K|       |   603   (1)| 00:00:08 |

|   5 |    INDEX FULL SCAN  | I_OBJ4 | 85519 |   167K|       |   386   (0)| 00:00:05 |

--------------------------------------------------------------------------------------

 

 

Statistics

----------------------------------------------------------

          1  recursive calls

          0  db block gets

       1474  consistent gets

          0  physical reads

          0  redo size

        528  bytes sent via SQL*Net to client

        520  bytes received via SQL*Net from client

          2  SQL*Net roundtrips to/from client

          1  sorts (memory)

          0  sorts (disk)

          1  rows processed

 

即表中記錄的是94099，而索引中記錄的是94098：

SYS@ora11g > set autot off

SYS@ora11g >

SYS@ora11g > select /*+ full(t) */  DATAOBJ#,type#,owner# from sys.obj$  t  WHERE t.dataobj# IN (94098,94099);

 

  DATAOBJ#      TYPE#     OWNER#

---------- ---------- ----------

     94099          0          0

 

SYS@ora11g > select /*+ full(t i_obj4) */  DATAOBJ#,type#,owner# from sys.obj$  t  WHERE t.dataobj# IN (94098,94099);

 

  DATAOBJ#      TYPE#     OWNER#

---------- ---------- ----------

     94098          0          0

 

 

 

 

 

2.3.3.2  使用bbed 修復ORA-8102

SYS@ora11g > select dump(94098,16),dump(94099,16) from dual;

 

DUMP(94098,16)          DUMP(94099,16)

----------------------- -----------------------

Typ=2 Len=4: c3,a,29,63 Typ=2 Len=4: c3,a,29,64

 

 

 

[oracle@rhel6lhr ~]$ bbed password=blockedit blocksize=8192 mode=edit filename='/u01/app/oracle/oradata/ora11g/system01.dbf'

 

BBED: Release 2.0.0.0.0 - Limited Production on Thu Sep 21 11:16:34 2017

 

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

 

************* !!! For Oracle Internal Use only !!! ***************

 

BBED> set block 94083

        BLOCK#          94083

BBED> map

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083                                 Dba:0x00000000

------------------------------------------------------------

KTB Data Block (Index Leaf)<<<<===索引塊

 

struct kcbh, 20 bytes                      @0      

 

struct ktbbh, 96 bytes                     @20     

 

struct kdxle, 32 bytes                     @116    

 

sb2 kd_off[297]                            @148    

 

ub1 freespace[1092]                        @742    

 

ub1 rowdata[6286]                          @1834   

 

ub4 tailchk                                @8188   

 

BBED> f /x 0a2963

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083            Offsets: 1981 to 2492           Dba:0x00000000

------------------------------------------------------------------------

0a296301 80018006 004000f1 001b0000 04c30a29 5b02c103 02c15b06 00416abb

00110000 04c30a29 5c02c102 02c15b06 00416abb 00100100 04c30a29 5c02c102

02c15b06 00416abb 000d0100 04c30a29 5b02c103 02c15b06 00416abb 000f0000

04c30a29 5a02c103 02c15b06 00416abb 000e0100 04c30a29 5a02c103 02c15b06

00416abb 000d0000 04c30a28 6202c103 02c15b06 00416abb 000c0000 04c30a28

6302c102 02c15b06 00416abb 000b0000 04c30a29 5902c103 01800600 416abb00

0a010004 c30a295e 01800180 06004000 f1001b00 0004c30a 283102c1 15018006

00416abb 00090000 04c30a29 5102c115 01800600 416abb00 08000004 c30a294f

02c11401 80060041 6abb0007 010004c3 0a295901 80018006 004000f1 001b0000

04c30a28 2d02c115 01800600 416abb00 06000004 c30a294d 02c11501 80060041

6abb0005 000004c3 0a294b02 c1140180 0600416a bb000400 0004c30a 282902c1

15018006 00416abb 00030000 04c30a29 4902c115 01800600 416abb00 02010004

c30a294e 01800180 06004000 f1001b00 0004c30a 294702c1 14018006 00416abb

00010000 04c30a28 2502c115 01800600 416abb00 000000ff 02c10201 80060040

2e9f0050 0000ff02 c1020180 0600402e 9f004800 00ff02c1 02018006 00402e9f

003e0000 ff02c102 01800600 402e9f00 380000ff 02c10201 80060040 2e9f0032

 

<32 bytes="" per="" line="">

 

BBED> f

BBED-00212: search string not found <<<<===只找到1個，說明位置就是這裏

 

 

BBED> set offset -2

        OFFSET          1979

BBED> d /v count 32

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083   Offsets: 1979 to 2010  Dba:0x00000000

-------------------------------------------------------

 04c30a29 63018001 80060040 00f1001b l ...)c......@....

000004c3 0a295b02 c10302c1 5b060041 l .....)[.....[..A

 

<16 bytes="" per="" line="">

BBED> set offset +4

        OFFSET          1983

 

BBED> d /v

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083   Offsets: 1983 to 2014  Dba:0x00000000

-------------------------------------------------------

63018001 80060040 00f1001b 000004c3 l c......@........

0a295b02 c10302c1 5b060041 6abb0011 l .)[.....[..Aj...

 

<16 bytes="" per="" line="">

 

BBED> m /x 64

Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) Y

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083            Offsets: 1983 to 2014           Dba:0x00000000

------------------------------------------------------------------------

64018001 80060040 00f1001b 000004c3 0a295b02 c10302c1 5b060041 6abb0011

 

<32 bytes="" per="" line="">

BBED> sum

Check value for File 0, Block 94083:

current = 0xb4e3, required = 0xb3e3

 

BBED> sum apply

Check value for File 0, Block 94083:

current = 0xb3e3, required = 0xb3e3

 

BBED> set offset 0

        OFFSET          0

 

BBED> f /x 0a2964

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083            Offsets: 1981 to 2012           Dba:0x00000000

------------------------------------------------------------------------

 0a296401 80018006 004000f1 001b0000 04c30a29 5b02c103 02c15b06 00416abb

 

<<<<===已修改爲和表中的數據一致

<32 bytes="" per="" line="">

BBED> f

BBED-00212: search string not found

BBED> v

DBVERIFY - Verification starting

FILE = /u01/app/oracle/oradata/ora11g/system01.dbf

BLOCK = 94083

 

 

DBVERIFY - Verification complete

 

Total Blocks Examined         : 1

Total Blocks Processed (Data) : 0

Total Blocks Failing   (Data) : 0

Total Blocks Processed (Index): 1

Total Blocks Failing   (Index): 0

Total Blocks Empty            : 0

Total Blocks Marked Corrupt   : 0 ====>>>>> 若該塊被標識爲壞塊，則須要修改offset爲8188處爲01

Total Blocks Influx           : 0

Message 531 not found;  product=RDBMS; facility=BBED

BBED> set offset 8188

        OFFSET          8188

 

BBED> d

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 94083            Offsets: 8188 to 8191           Dba:0x00000000

------------------------------------------------------------------------

 0106aa4c

 

<32 bytes="" per="" line="">

 

 

 

2.3.3.3  驗證

SYS@ora11g > create table t1 as select * from dual;

create table t1 as select * from dual

                                 *

ERROR at line 1:

ORA-00604: error occurred at recursive SQL level 1

ORA-08102: index key not found, obj# 39, file 1, block 94083 (2)

 

SYS@ora11g >  startup force;===>>>>> 慎用

ORACLE instance started.

 

Total System Global Area  409194496 bytes

Fixed Size                  2228864 bytes

Variable Size             306187648 bytes

Database Buffers           92274688 bytes

Redo Buffers                8503296 bytes

Database mounted.

Database opened.

SYS@ora11g >  create table t1 as select * from dual;

 

Table created.

 

SYS@ora11g > insert into t1 select * from dual;

 

1 row created.

 

SYS@ora11g > commit;

 

Commit complete.

 

SYS@ora11g > select * from t1;

 

D

-

X

X

 

 

OK，搞定。

 

2.3.4  模擬二：利用con$作模擬

看了郭一軍大師的博客，也可使用con$表來模擬ORA-08102錯誤，因此，小麥苗也嘗試了一把。這個模擬實驗就不詳細解釋了。

 

con$表是Oracle數據庫中約束的基表，

SELECT * FROM Dba_Dependencies d WHERE d.name='DBA_CONSTRAINTS' AND d.owner='SYS' AND D.referenced_type='TABLE' ;

wpsFAA8.tmp 

參考文檔是郭一軍老師的：http://blog.chinaunix.net/uid-28460966-id-4584119.html

DROP TABLE T_ORA8102_LHR;

CREATE TABLE T_ORA8102_LHR AS SELECT * FROM USER_OBJECTS;

CREATE UNIQUE INDEX IDX_ORA8102_LHR ON T_ORA8102_LHR(OBJECT_ID);

ALTER TABLE T_ORA8102_LHR ADD PRIMARY KEY(OBJECT_ID);

LHR@ora11g > SELECT CONSTRAINT_NAME FROM DBA_CONSTRAINTS WHERE TABLE_NAME='T_ORA8102_LHR';

 

CONSTRAINT_NAME

------------------------------

SYS_C0018168

 

LHR@ora11g > SELECT MAX(CON#) FROM SYS.CON$;

 

MAX(CON#)

----------

     18169

 

LHR@ora11g > SELECT D.NAME,

  2         DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID) FILE#,

  3         DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID) BLOCK#,

  4         DBMS_ROWID.ROWID_ROW_NUMBER(ROWID) ROW#

  5    FROM SYS.CON$ D

  6   WHERE D.CON# = 18169;

 

NAME                                FILE#     BLOCK#       ROW#

------------------------------ ---------- ---------- ----------

_NEXT_CONSTRAINT                        1        289         12

 

LHR@ora11g >  SELECT COUNT(*) COUNTS,

  2         MAX(DBMS_ROWID.ROWID_ROW_NUMBER(ROWID)) MAX_ROWNUM,

  3         MIN(DBMS_ROWID.ROWID_ROW_NUMBER(ROWID)) MIN_ROWNUM

  4    FROM SYS.CON$ D

  5   WHERE DBMS_ROWID.ROWID_RELATIVE_FNO(ROWID) = 1

  6     AND DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID) = 289;  

 

    COUNTS MAX_ROWNUM MIN_ROWNUM

---------- ---------- ----------

       311        310          0

 

 

 

SELECT D.* FROM SYS.CON$ D WHERE D.CON# = 18169;

wpsFAA9.tmp 

[oracle@rhel6lhr ~]$ bbed password=blockedit blocksize=8192 mode=edit filename='/u01/app/oracle/oradata/ora11g/system01.dbf'

 

BBED: Release 2.0.0.0.0 - Limited Production on Thu Sep 21 13:31:03 2017

 

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

 

************* !!! For Oracle Internal Use only !!! ***************

 

BBED> set block 289

        BLOCK#          289

 

BBED> map

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 289                                   Dba:0x00000000

------------------------------------------------------------

KTB Data Block (Table/Cluster)

 

struct kcbh, 20 bytes                      @0      

 

struct ktbbh, 72 bytes                     @20     

 

struct kdbh, 14 bytes                      @92     

 

struct kdbt[1], 4 bytes                    @106    

 

sb2 kdbr[311]                              @110    

 

ub1 freespace[675]                         @732    

 

ub1 rowdata[6781]                          @1407   

 

ub4 tailchk                                @8188   

 

 

BBED> p kdbr

sb2 kdbr[0]                                 @110      8077

sb2 kdbr[1]                                 @112      8057

sb2 kdbr[2]                                 @114      8038

sb2 kdbr[3]                                 @116      8016

sb2 kdbr[4]                                 @118      7994

sb2 kdbr[5]                                 @120      7972

sb2 kdbr[6]                                 @122      7952

sb2 kdbr[7]                                 @124      7932

sb2 kdbr[8]                                 @126      7910

sb2 kdbr[9]                                 @128      7888

sb2 kdbr[10]                                @130      7868

sb2 kdbr[11]                                @132      7848

sb2 kdbr[12]                                @134      1315

sb2 kdbr[13]                                @136      7826

。。。。。。。省略部份內容。。。。。。。。。

sb2 kdbr[303]                               @716      1640

sb2 kdbr[304]                               @718      1618

sb2 kdbr[305]                               @720      1596

sb2 kdbr[306]                               @722      1574

sb2 kdbr[307]                               @724      1552

sb2 kdbr[308]                               @726      1530

sb2 kdbr[309]                               @728      1508

sb2 kdbr[310]                               @730      1486

 

BBED> p *kdbr[12]

rowdata[0]

----------

ub1 rowdata[0]                              @1407     0x2c

 

BBED> show offset

        OFFSET          1407

 

BBED> x /rncnn

rowdata[0]                                  @1407   

----------

flag@1407: 0x2c (KDRHFL, KDRHFF, KDRHFH)

lock@1408: 0x00

cols@1409:    4

 

col    0[1] @1410: 0

col   1[16] @1412: _NEXT_CONSTRAINT

col    2[4] @1429: 18169 

col    3[1] @1434: 0

 

BBED> d /v offset 1429 count 16

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 289     Offsets: 1429 to 1444  Dba:0x00000000

-------------------------------------------------------

 04c30252 4601802c 00040180 105f4e45 l ...RE..,....._NE

 

<16 bytes="" per="" line="">

 

 

 

 

LHR@ora11g > select dump(18169,16),dump(18170,16) from dual;

 

DUMP(18169,16)          DUMP(18170,16)

----------------------- -----------------------

Typ=2 Len=4: c3,2,52,46 Typ=2 Len=4: c3,2,52,47

 

 

BBED> set offset +4

        OFFSET          1433

 

BBED> d

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 289              Offsets: 1433 to 1448           Dba:0x00000000

------------------------------------------------------------------------

4601802c 00040180 105f4e45 58545f43

 

<32 bytes="" per="" line="">

 

BBED> m /x 47

Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) Y

File: /u01/app/oracle/oradata/ora11g/system01.dbf (0)

Block: 289              Offsets: 1433 to 1448           Dba:0x00000000

------------------------------------------------------------------------

4701802c 00040180 105f4e45 58545f43

 

<32 bytes="" per="" line="">

 

BBED> sum

Check value for File 0, Block 289:

current = 0xeeee, required = 0xecee

 

BBED> sum apply

Check value for File 0, Block 289:

current = 0xecee, required = 0xecee

 

BBED> v

DBVERIFY - Verification starting

FILE = /u01/app/oracle/oradata/ora11g/system01.dbf

BLOCK = 289

 

 

DBVERIFY - Verification complete

 

Total Blocks Examined         : 1

Total Blocks Processed (Data) : 1

Total Blocks Failing   (Data) : 0

Total Blocks Processed (Index): 0

Total Blocks Failing   (Index): 0

Total Blocks Empty            : 0

Total Blocks Marked Corrupt   : 0

Total Blocks Influx           : 0

Message 531 not found;  product=RDBMS; facility=BBED

 

BBED> p *kdbr[12]

rowdata[0]

----------

ub1 rowdata[0]                              @1407     0x2c

 

BBED> x /rccnn

rowdata[0]                                  @1407   

----------

flag@1407: 0x2c (KDRHFL, KDRHFF, KDRHFH)

lock@1408: 0x00

cols@1409:    4

 

col    0[1] @1410: .

col   1[16] @1412: _NEXT_CONSTRAINT

col    2[4] @1429: 18170

col    3[1] @1434: 0

 

 

 

 

SYS@ora11g >  startup force

ORACLE instance started.

 

Total System Global Area  409194496 bytes

Fixed Size                  2228864 bytes

Variable Size             314576256 bytes

Database Buffers           83886080 bytes

Redo Buffers                8503296 bytes

Database mounted.

Database opened.

SYS@ora11g > conn lhr/lhr

Connected.

LHR@ora11g > ALTER TABLE T_ORA8102_LHR DROP PRIMARY KEY;

 

Table altered.

 

LHR@ora11g > ALTER TABLE T_ORA8102_LHR ADD PRIMARY KEY(OBJECT_ID);

ALTER TABLE T_ORA8102_LHR ADD PRIMARY KEY(OBJECT_ID)

*

ERROR at line 1:

ORA-00604: error occurred at recursive SQL level 1

ORA-08102: index key not found, obj# 52, file 1, block 93040 (2)

 

LHR@ora11g > SELECT d.OBJECT_NAME,d.OBJECT_TYPE FROM Dba_Objects d WHERE d.OBJECT_ID=52;

 

OBJECT_NAME                    OBJECT_TYPE

------------------------------ -------------------

I_CON2                         INDEX

 

LHR@ora11g > SELECT * FROM SYS.BOOTSTRAP$ D WHERE D.OBJ#=52;

 

     LINE#       OBJ# SQL_TEXT

---------- ---------- -----------------------------------------------

        52         52 CREATE UNIQUE INDEX I_CON2 ON CON$(CON#) PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE (  INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 52 EXTENTS (FILE 1 BLOCK 464))

 

LHR@ora11g > set long 9999

LHR@ora11g > select dbms_metadata.get_ddl('INDEX','I_CON2','SYS') from dual;

 

DBMS_METADATA.GET_DDL('INDEX','I_CON2','SYS')

--------------------------------------------------------------------------------

 

  CREATE UNIQUE INDEX "SYS"."I_CON2" ON "SYS"."CON$" ("CON#")

  PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS

  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645

  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1

  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)

  TABLESPACE "SYSTEM"

 

 

wpsFAB9.tmp 

 

告警日誌：

wpsFABA.tmp

Thu Sep 21 14:18:32 2017

Errors in file /u01/app/oracle/diag/rdbms/ora11g/ora11g/trace/ora11g_ora_31964.trc:

Thu Sep 21 14:18:33 2017

Dumping diagnostic data in directory=[cdmp_20170921141833], requested by (instance=1, osid=31964), summary=[abnormal process termination].

 

 

 

找到：

oer 8102.2 - obj# 52, rdba: 0x00416b70(afn 1, blk# 93040)

kdk key 8102.2:

  ncol: 1, len: 5

  key: (5):  04 c3 02 52 47<<<<===在索引中找不到鍵值04 c3 02 52 47（轉換爲10進制即18170）

 

  mask: (4096):

。。。。。。。。。省略。。。。。。。。

 

*** 2017-09-21 14:18:32.488

dbkedDefDump(): Starting a non-incident diagnostic dump (flags=0x0, level=3, mask=0x0)

----- Error Stack Dump -----

----- Current SQL Statement for this session (sql_id=bajr90ryjd2w8) -----

update con$ set con#=:3,spare1=:4 where owner#=:1 and name=:2

。。。。。。。。。省略。。。。。。。。

Block header dump:  0x00416b70<<<<===搜Block header dump

Object id on Block? Y

seg/obj: 0x34  csc: 0x00.39125d6  itc: 3  flg: O  typ: 2 - INDEX<<<<===找到52號對象

     fsl: 0  fnx: 0x416b71 ver: 0x01

。。。。。。。。。省略。。。。。。。。

row#447[966] flag: ------, lock: 0, len=13, data:(6):  00 41 69 a4 00 d9

col 0; len 4; (4):  c3 02 52 44

row#448[940] flag: ---D--, lock: 3, len=13, data:(6):  00 41 69 a4 00 da

col 0; len 4; (4):  c3 02 52 45

row#449[953] flag: ------, lock: 0, len=13, data:(6):  00 40 01 21 00 0c====>>>>> ROWID

col 0; len 4; (4):  c3 02 52 46====>>>>> 索引中存儲的最大鍵值是18169

----- end of leaf block dump -----

      ----------------------------------------

      SO: 0x7624b240, type: 56, owner: 0x77896d88, flag: INIT/-/-/0x00 if: 0x3 c: 0x3

       proc=0x77c98660, name=transaction, file=ktccts.h LINE:410, pg=0

 

 

注意索引中的ROWID（2進制共48位）=文件號（2進制前10位）+塊號（2進制22位）+行號（2進制16位）

00 40 01 21 00 0c（16進制）= 000000000100000000000001001000010000000000001100（2進制）

文件號=（0000000001）取前10位的二進制=第1號文件

塊號=（0000000000000100100001）取前2進制22位==>第289號

行號=（0000000000001100）取2進制16位==>第12行

LHR@ora11g > select dump(18169,16),dump(18170,16) from dual;

 

DUMP(18169,16)          DUMP(18170,16)

----------------------- -----------------------

Typ=2 Len=4: c3,2,52,46 Typ=2 Len=4: c3,2,52,47

 

LHR@ora11g > select utl_raw.cast_to_number('c3025247'),utl_raw.cast_to_number('c3025246') from dual;

 

UTL_RAW.CAST_TO_NUMBER('C3025247') UTL_RAW.CAST_TO_NUMBER('C3025246')

---------------------------------- ----------------------------------

                             18170                              18169

 

 

ORA-8102常見於索引鍵值與表上存的值不一致。(Corruption related to Index 索引)

ORA- 8102便可能是ORACLE的bug，也多是因爲硬件I/O錯誤所引發。硬件或者I/O子系統因爲丟失寫 Lost Write形成塊的邏輯上訛誤，當一個Lost Io發生，包含對key的修改或者沒有寫入到ORACLE數據文件上，這便可能發生在表塊上也可能發生在索引塊上。

查看這個對象號爲52的對象，發現是SYS.CON$表中I_CON2索引，這是一個BOOTSTRAP$對象，並且這是一個核心BOOTSTRP$對象，是不能經過startup migrate和event 38003重建的，因此最終只能經過BBED去修改這個塊中有問題的地方。

[root@rhel6lhr ~]# oerr ora 38003

38003, 00000, "CBO Disable column stats for the dictionary objects in recursive SQL"

// *Cause:

// *Action:

[root@rhel6lhr ~]#

 

先經過下面這個SQL，查找表和索引之間到底相差什麼

 

LHR@ora11g > set autot on

LHR@ora11g >

LHR@ora11g > select /*+ index(t I_CON2) */ T.CON# from sys.CON$  t 

  2  minus

  3  select /*+ full(t1) */ T1.CON# from sys.CON$  t1;

 

      CON#

----------

     18169

 

 

Execution Plan

----------------------------------------------------------

Plan hash value: 2332423480

 

--------------------------------------------------------------------------------------

| Id  | Operation           | Name   | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |

--------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT    |        | 16963 |   165K|       |   163  (48)| 00:00:02 |

|   1 |  MINUS              |        |       |       |       |            |          |

|   2 |   SORT UNIQUE NOSORT|        | 16963 | 84815 |       |    88   (3)| 00:00:02 |

|   3 |    INDEX FULL SCAN  | I_CON2 | 16963 | 84815 |       |    32   (0)| 00:00:01 |

|   4 |   SORT UNIQUE       |        | 16963 | 84815 |   208K|    76   (3)| 00:00:01 |

|   5 |    TABLE ACCESS FULL| CON$   | 16963 | 84815 |       |    20   (0)| 00:00:01 |

--------------------------------------------------------------------------------------

 

 

Statistics

----------------------------------------------------------

          1  recursive calls

          0  db block gets

        102  consistent gets

          0  physical reads

          0  redo size

        524  bytes sent via SQL*Net to client

        520  bytes received via SQL*Net from client

          2  SQL*Net roundtrips to/from client

          1  sorts (memory)

          0  sorts (disk)

          1  rows processed

 

LHR@ora11g > select /*+ full(t1) */ T1.CON# from sys.CON$  t1

  2   minus

  3    select /*+ index(t I_CON2) */ T.CON# from sys.CON$  t 

  4   ;

 

      CON#

----------

     18170

 

 

Execution Plan

----------------------------------------------------------

Plan hash value: 2017867816

 

--------------------------------------------------------------------------------------

| Id  | Operation           | Name   | Rows  | Bytes |TempSpc| Cost (%CPU)| Time     |

--------------------------------------------------------------------------------------

|   0 | SELECT STATEMENT    |        | 16963 |   165K|       |   163  (55)| 00:00:02 |

|   1 |  MINUS              |        |       |       |       |            |          |

|   2 |   SORT UNIQUE       |        | 16963 | 84815 |   208K|    76   (3)| 00:00:01 |

|   3 |    TABLE ACCESS FULL| CON$   | 16963 | 84815 |       |    20   (0)| 00:00:01 |

|   4 |   SORT UNIQUE NOSORT|        | 16963 | 84815 |       |    88   (3)| 00:00:02 |

|   5 |    INDEX FULL SCAN  | I_CON2 | 16963 | 84815 |       |    32   (0)| 00:00:01 |

--------------------------------------------------------------------------------------

 

 

Statistics

----------------------------------------------------------

          1  recursive calls

          0  db block gets

        102  consistent gets

          0  physical reads

          0  redo size

        524  bytes sent via SQL*Net to client

        520  bytes received via SQL*Net from client

          2  SQL*Net roundtrips to/from client

          1  sorts (memory)

          0  sorts (disk)

          1  rows processed

 

LHR@ora11g > select /*+ full(t) */  T.CON# from sys.CON$  t  WHERE t.CON# IN (18169,18170);

 

      CON#

----------

     18170

 

 

Execution Plan

----------------------------------------------------------

Plan hash value: 3767504726

 

--------------------------------------------------------------------------

| Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |

--------------------------------------------------------------------------

|   0 | SELECT STATEMENT  |      |     2 |    10 |    20   (0)| 00:00:01 |

|*  1 |  TABLE ACCESS FULL| CON$ |     2 |    10 |    20   (0)| 00:00:01 |

--------------------------------------------------------------------------

 

Predicate Information (identified by operation id):

---------------------------------------------------

 

   1 - filter("T"."CON#"=18169 OR "T"."CON#"=18170)

 

 

Statistics

----------------------------------------------------------

          5  recursive calls

          0  db block gets

         77  consistent gets

          0  physical reads

          0  redo size

        524  bytes sent via SQL*Net to client

        520  bytes received via SQL*Net from client

          2  SQL*Net roundtrips to/from client

          2  sorts (memory)

          0  sorts (disk)

          1  rows processed

 

LHR@ora11g > select /*+ full(t I_CON2) */  T.CON# from sys.CON$  t  WHERE t.CON# IN (18169,18170);

 

      CON#

----------

     18169

 

 

Execution Plan

----------------------------------------------------------

Plan hash value: 1461913314

 

-----------------------------------------------------------------------------

| Id  | Operation          | Name   | Rows  | Bytes | Cost (%CPU)| Time     |

-----------------------------------------------------------------------------

|   0 | SELECT STATEMENT   |        |     2 |    10 |     3   (0)| 00:00:01 |

|   1 |  INLIST ITERATOR   |        |       |       |            |          |

|*  2 |   INDEX UNIQUE SCAN| I_CON2 |     2 |    10 |     3   (0)| 00:00:01 |

-----------------------------------------------------------------------------

 

Predicate Information (identified by operation id):

---------------------------------------------------

 

   2 - access("T"."CON#"=18169 OR "T"."CON#"=18170)

 

 

Statistics

----------------------------------------------------------

          1  recursive calls

          0  db block gets

          4  consistent gets

          0  physical reads

          0  redo size

        524  bytes sent via SQL*Net to client

        520  bytes received via SQL*Net from client

          2  SQL*Net roundtrips to/from client

          0  sorts (memory)

          0  sorts (disk)

          1  rows processed

 

利用這樣的方法來查詢表和索引之間的不一致，經過查詢結果確實能夠看到表和索引存在不同的，表裏是18170，而索引裏存儲的是18169，說明索引鍵值與表上存的值不一致

 

那麼怎麼辦呢？如何處理這個問題？咱們直接對索引進行rebuild，看行不行？

SYS@ora11g > alter index sys.I_CON2 rebuild;

alter index sys.I_CON2 rebuild

*

ERROR at line 1:

ORA-00701: object necessary for warmstarting database cannot be altered

 

LHR@ora11g > select dump(18169,16),dump(18170,16) from dual;

 

DUMP(18169,16)          DUMP(18170,16)

----------------------- -----------------------

Typ=2 Len=4: c3,2,52,46 Typ=2 Len=4: c3,2,52,47

 

LHR@ora11g > select utl_raw.cast_to_number('c3025247'),utl_raw.cast_to_number('c3025246') from dual;

 

UTL_RAW.CAST_TO_NUMBER('C3025247') UTL_RAW.CAST_TO_NUMBER('C3025246')

---------------------------------- ----------------------------------

                             18170                              18169

 

 

[oracle@rhel6lhr ~]$ bbed password=blockedit blocksize=8192 mode=edit filename='/u01/app/oracle/oradata/ora11g/system01.dbf'

 

BBED: Release 2.0.0.0.0 - Limited Production on Thu Sep 21 16:08:05 2017
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