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oracle中OBJ4 ORA-8102故障恢復案例
下面我們一起來看看關於oracle中OBJ4 ORA-8102故障恢復案例，希望本文章可以幫助到各位朋友。
在測試環境中對於OBJ$中i_obj4中出現ORA-8102進行了重新並恢復測試,認為自己已經比較清楚的掌握了I_OBJ4的ORA-8102問題處理,可是實際的一個案例,還是比較比實驗中復雜,這裡貼出來主要操作供大家參考,再次證明數據庫恢復的場景不可大意,客戶的故障只有你想不到的,沒有遇不到的
通過bbed修改obj$中dataobj$重現I_OBJ4索引報ORA-08102錯誤
使用bbed 修復I_OBJ4 index 報ORA-8102
數據庫創建表提示ORA-8102錯誤
SQL> startup
ORACLE instance started.
Total System Global Area 2.6991E+10 bytes
Fixed Size 2213976 bytes
Variable Size 1.9327E+10 bytes
Database Buffers 7516192768 bytes
Redo Buffers 145174528 bytes
Database mounted.
Database opened.
SQL> create table t1 as select * from dual;
create table t1 as select * from dual
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-08102: index key not found, obj# 39, file 1, block 93842 (2)
分析ORA-08102錯誤
SQL> select object_name,object_type from dba_objects where object_id=39;
OBJECT_NAME OBJECT_TYPE
------------------------------ -------------------
I_OBJ4 INDEX
SQL> create table t1 as select * from dual;
create table t1 as select * from dual
*
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-08102: index key not found, obj# 39, file 1, block 93842 (2)
SQL> select /*+ index(t i_obj4) */ DATAOBJ#,type#,owner# from obj$ t
minus
select /*+ full(t1) */ DATAOBJ#,type#,owner# from obj$ t1;
2 3
DATAOBJ# TYPE# OWNER#
---------- ---------- ----------
97109 0 0
SQL> select /*+ full(t1) */ DATAOBJ#,type#,owner# from obj$ t1
minus
select /*+ index(t i_obj4) */ DATAOBJ#,type#,owner# from obj$ t
;
2 3 4
DATAOBJ# TYPE# OWNER#
---------- ---------- ----------
97094 0 0
SQL> SET LINES 122
COL INDEX_OWNER FOR A20
COL INDEX_NAME FOR A30
COL TABLE_OWNER FOR A20
COL COLUMN_NAME FOR A25
SELECT TABLE_OWNER,INDEX_NAME,COLUMN_NAME,COLUMN_POSITION
FROM Dba_Ind_Columns
WHERE table_name = upper('&TABLE_NAME') order by TABLE_OWNER,INDEX_OWNER,INDEX_NAME,COLUMN_POSITION
and index_name='I_OBJ4';
SQL> SQL> SQL> SQL> SQL> 2 3
Enter value for table_name: OBJ$
old 3: WHERE table_name = upper('&TABLE_NAME') order by TABLE_OWNER,INDEX_OWNER,INDEX_NAME,COLUMN_POSITION
new 3: WHERE table_name = upper('OBJ$') order by TABLE_OWNER,INDEX_OWNER,INDEX_NAME,COLUMN_POSITION
TABLE_OWNER INDEX_NAME COLUMN_NAME COLUMN_POSITION
-------------------- ------------------------------ ------------------------- ---------------
SYS I_OBJ4 DATAOBJ# 1
SYS I_OBJ4 TYPE# 2
SYS I_OBJ4 OWNER# 3
SQL> SELECT DATAOBJ# FROM OBJ$ WHERE OBJ#=97109;
no rows selected
SQL> SELECT DATAOBJ# FROM OBJ$ WHERE OBJ#=97094;
DATAOBJ#
----------
97094
SQL> select /*+ index(t i_obj4) */ rowid,DATAOBJ#,type#,owner# from obj$ t
minus
select /*+ full(t1) */ rowid,DATAOBJ#,type#,owner# from obj$ t1;
2 3
ROWID DATAOBJ# TYPE# OWNER#
------------------ ---------- ---------- ----------
AAAAASAABAAAADxAAb 97109 0 0
SQL> select /*+ full(t1) */ rowid,DATAOBJ#,type#,owner# from obj$ t1
minus
select /*+ index(t i_obj4) */ rowid,DATAOBJ#,type#,owner# from obj$ t
;
2 3 4
ROWID DATAOBJ# TYPE# OWNER#
------------------ ---------- ---------- ----------
AAAAASAABAAAADxAAb 97094 0 0
SQL> select name,obj#,dataobj# from obj$ where rowid='AAAAASAABAAAADxAAb';
NAME OBJ# DATAOBJ#
------------------------------ ---------- ----------
_NEXT_OBJECT 1 97094
到此也比較清楚,rowid為AAAAASAABAAAADxAAb的dataobj#記錄在obj$表中為97094而在I_OBJ4中記錄為97109,因此兩者不一致,從而出現ORA-8102錯誤
嘗試bbed解決ORA-8102問題
嘗試修改obj$和i_obj4中的dataobj#記錄一致，這裡修改obj$中的對應記錄
SQL> select dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#,
dbms_rowid.rowid_row_number(rowid) row#
from obj$ where rowid='AAAAASAABAAAADxAAb' 2 3
4 /
FILE# BLOCK# ROW#
---------- ---------- ----------
1 241 27
SQL> select dump(97109,16) from dual;
DUMP(97109,16)
----------------------
Typ=2 Len=4: c3,a,48,a
SQL> select dump(97094,16) from dual;
DUMP(97094,16)
-----------------------
Typ=2 Len=4: c3,a,47,5f
-bash-4.1$ bbed blocksize=8192 mode=edit filename=/u01/app/oracle/oradata/oa/system01.dbf
Password:
BBED: Release 2.0.0.0.0 - Limited Production on Sat Mar 14 19:30:18 2015
Copyright (c) 1982, 2009, 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/oa/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/oa/system01.dbf (0)
Block: 241 Dba:0x00000000
------------------------------------------------------------
KTB Data Block (Table/Cluster)
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
BBED> p *kdbr[27]
rowdata[0]
----------
ub1 rowdata[0] @383 0x2c
BBED> x /rnnncnnncc
rowdata[0] @383
----------
flag@383: 0x2c (KDRHFL, KDRHFF, KDRHFH)
lock@384: 0x00
cols@385: 18
col 0[2] @386: 1
col 1[4] @389: 97094
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: xm....4
col 8[7] @423: xs....6
col 9[7] @431: xm....4
col 10[1] @439: .
col 11[0] @441: *NULL*
col 12[0] @442: *NULL*
col 13[1] @443: .
col 14[0] @445: *NULL*
col 15[1] @446: .
col 16[4] @448: ..8$
col 17[1] @453: .
BBED> set count 32
COUNT 32
BBED> set offset 389
OFFSET 389
BBED> d
File: /u01/app/oracle/oradata/oa/system01.dbf (0)
Block: 241 Offsets: 389 to 420 Dba:0x00000000
----------------------------------------
