11 ORA-8102：Index Corruption解析
[oracle@DSI ~]$ 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
常见于索引键值与表上存的值不一致，可能是ORACLE的bug，也可能是由于硬件I/O错误所引起！
硬件或者I/O子系统由于丢失写 Lost Write造成块的逻辑上讹误，当一个Lost Io发生，包含对key的修改或者没有写入到ORACLE数据文件上，
这即可能发生在表块上也可能发生在索引块上。
ORA-8102：Index Corruption解析（Cont…）
创建索引-->更新数据块-->1号文件52号块-->con$
-->更新索引块-->1号文件xxx块-->con$
--二者不相等就会报错8102
--人为构建8102错误
SQL> conn test/*** Connected. SQL> create table yhq_test(id int,name varchar2(100)); Table created. SQL> begin for i in 1 .. 5000 loop insert into yhq_test values(i,'yhq'||i); commit; end loop; end; / 2 3 4 5 6 7 PL/SQL procedure successfully completed. SQL> select user_id,username from dba_users where username='TEST'; USER_ID USERNAME ---------- ------------------------------ 83 TEST SQL> alter table yhq_test add primary key(id); Table altered. SQL> select CONSTRAINT_NAME from dba_constraints where table_name='YHQ_TEST'; CONSTRAINT_NAME ------------------------------ SYS_C0011762
--查看索引文件块号
SQL> conn / as sysdba Connected. SQL> select dbms_rowid.rowid_relative_fno(rowid) file#,dbms_rowid.rowid_block_number(rowid) block#, dbms_rowid.rowid_row_number(rowid) row# from con$ where name='_NEXT_CONSTRAINT'; 2 3 4 FILE# BLOCK# ROW# ---------- ---------- ---------- 1 289 12 SQL> select /*+ FULL(t1) */ owner#,name,con# from con$ t1 WHERE NAME='_NEXT_CONSTRAINT'; OWNER# NAME CON# ---------- ------------------------------ ---------- 0 _NEXT_CONSTRAINT 11763 SQL> select /*+ index(t1 I_CON2) */ owner#,name,con# from con$ t1 WHERE NAME='_NEXT_CONSTRAINT'; OWNER# NAME CON# ---------- ------------------------------ ---------- 0 _NEXT_CONSTRAINT 11763 --这两个值相等是正常的
SQL> select * from bootstrap$ where obj#=52; LINE# OBJ# ---------- ---------- SQL_TEXT -------------------------------------------------------------------------------- 52 52 CREATE UNIQUE INDEX I_CON2 ON CON$(CON#) PCTFREE 10 INITRANS 2 MAXTRANS 255 STOR AGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 O BJNO 52 EXTENTS (FILE 1 BLOCK 464))
--用bbed查看并修改
BBED> set file 1 block 289 FILE# 1 BLOCK# 289 BBED> map /v File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 289 Dba:0x00400121 BBED> p *kdbr[12] rowdata[0] ---------- ub1 rowdata[0] @920 0x2c BBED> x /rccnn rowdata[0] @920 ---------- flag@920: 0x2c (KDRHFL, KDRHFF, KDRHFH) lock@921: 0x01 cols@922: 4 col 0[1] @923: . col 1[16] @925: _NEXT_CONSTRAINT col 2[4] @942: 11763 ##这个11763和上面查到的一致 col 3[1] @947: 0
--11763 修改为11764
--十进制转换 SQL> select dump(11763,16) from dual; DUMP(11763,16) ----------------------- Typ=2 Len=4: c3,2,12,40 SQL> select dump(11764,16) from dual; DUMP(11764,16) ----------------------- Typ=2 Len=4: c3,2,12,41 SQL> alter system flush buffer_cache; System altered.
--修改并查看
BBED> d /v offset 942 count 32 File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 289 Offsets: 942 to 973 Dba:0x00400121 ------------------------------------------------------- 04c30212 4001802c 00040180 105f4e45 l .n.@..,....._NE 58545f43 4f4e5354 5241494e 5403c302 l XT_CONSTRAINT.n <16 bytes per line> BBED> modify /x 41 offset 946 Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 289 Offsets: 946 to 977 Dba:0x00400121 ------------------------------------------------------------------------ 4101802c 00040180 105f4e45 58545f43 4f4e5354 5241494e 5403c302 1201802c <32 bytes per line> BBED> sum apply Check value for File 1, Block 289: current = 0xf014, required = 0xf014 BBED> d /v offset 942 count 32 File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 289 Offsets: 942 to 973 Dba:0x00400121 ------------------------------------------------------- 04c30212 4101802c 00040180 105f4e45 l .n.A..,....._NE 58545f43 4f4e5354 5241494e 5403c302 l XT_CONSTRAINT.n <16 bytes per line> BBED> p *kdbr[12] rowdata[0] ---------- ub1 rowdata[0] @920 0x2c BBED> x /rccnn rowdata[0] @920 ---------- flag@920: 0x2c (KDRHFL, KDRHFF, KDRHFH) lock@921: 0x01 cols@922: 4 col 0[1] @923: . col 1[16] @925: _NEXT_CONSTRAINT col 2[4] @942: 11764 ###修改为11763+1 col 3[1] @947: 0
--重启数据库，查看，并重建索引
--重启数据库 SQL> startup; ORACLE instance started. Total System Global Area 784998400 bytes Fixed Size 2257352 bytes Variable Size 478154296 bytes Database Buffers 297795584 bytes Redo Buffers 6791168 bytes Database mounted. Database opened. SQL> SQL> SQL> select /*+ FULL(t1) */ owner#,name,con# from con$ t1 WHERE NAME='_NEXT_CONSTRAINT'; OWNER# NAME CON# ---------- ------------------------------ ---------- 0 _NEXT_CONSTRAINT 11764 SQL> select /*+ index(t1 I_CON2) */ owner#,name,con# from con$ t1 WHERE NAME='_NEXT_CONSTRAINT'; OWNER# NAME CON# ---------- ------------------------------ ---------- 0 _NEXT_CONSTRAINT 11763 --两个值不一样 SQL> conn test/test Connected. SQL> alter table yhq_test drop primary key; Table altered. SQL> alter table yhq_test add primary key(id); alter table yhq_test add primary key(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 78302 (2)
--查看错误日志
[oracle@DSI ~]$ tail -n 30 /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_14127.trc REDO RECORD - Thread:1 RBA: 0x000026.00004836.0010 LEN: 0x0074 VLD: 0x05 SCN: 0x0000.009c8d44 SUBSCN: 1 07/10/2019 09:52:46 (LWN RBA: 0x000026.00004836.0010 LEN: 0003 NST: 0001 SCN: 0x0000.009c8d44) CHANGE #1 MEDIA RECOVERY MARKER SCN:0x0000.00000000 SEQ:0 OP:18.3 ENC:0 Reuse redo entry Object reuse: tsn=5 objd=88123 REDO RECORD - Thread:1 RBA: 0x000026.00004839.018c LEN: 0x0048 VLD: 0x01 SCN: 0x0000.009c8d47 SUBSCN: 3 07/10/2019 09:52:46 (LWN RBA: 0x000026.00004839.0010 LEN: 0001 NST: 0001 SCN: 0x0000.009c8d47) CHANGE #1 MEDIA RECOVERY MARKER SCN:0x0000.00000000 SEQ:0 OP:18.3 ENC:0 Reuse redo entry Range reuse: tsn=5 base=20984144 nblks=8 END OF DUMP REDO KQRCMT: Write failed with error=604 po=0x885dde30 cid=12 diagnostics : cid=12 hash=28d84319 flag=2a [oracle@DSI ~]$ tail -n 30 /u01/app/oracle/diag/rdbms/orcl/orcl/trace/alert_orcl.log
--dump索引块--存放索引信息
SQL> alter system dump datafile 1 block 78302; System altered. [oracle@DSI ~]$ vim /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_14148.trc Block header dump: 0x004131de Object id on Block? Y seg/obj: 0x34 csc: 0x00.9c8d42 itc: 3 flg: O typ: 2 - INDEX fsl: 0 fnx: 0x4131df ver: 0x01 Itl Xid Uba Flag Lck Scn/Fsc 0x01 0x0006.002.00005b68 0x00c07d95.01df.01 CB-- 0 scn 0x0000.0096102a 0x02 0x0009.018.00005c53 0x00c00102.01f8.11 C--- 0 scn 0x0000.009c713e 0x03 0x0008.003.00007a05 0x00c01bfd.0225.01 --U- 1 fsc 0x000f.009c8d43 Leaf block dump =============== header address 139990239005300=0x7f520477ca74 kdxcolev 0 KDXCOLEV Flags = - - - kdxcolok 0 kdxcoopc 0x80: opcode=0: iot flags=--- is converted=Y kdxconco 1 kdxcosdc 1 kdxconro 359 kdxcofbo 754=0x2f2 kdxcofeo 1942=0x796 kdxcoavs 2591 kdxlespl 0 kdxlende 1 kdxlenxt 0=0x0 kdxleprv 4272605=0x4131dd kdxledsz 6 kdxlebksz 8008 row#357[1942] flag: ---D--, lock: 3, len=13, data:(6): 00 41 57 47 00 61 col 0; len 4; (4): c3 02 12 3f row#358[1955] flag: ------, lock: 0, len=13, data:(6): 00 40 01 21 00 0c ---1955 相对位置 col 0; len 4; (4): c3 02 12 40 ----- end of leaf block dump ----- End dump data blocks tsn: 0 file#: 1 minblk 78302 maxblk 78302
--使用bbed查看并修改
BBED> set file 1 block 78302; FILE# 1 BLOCK# 78302 BBED> p ktbbh SQL> select utl_raw.cast_to_number(replace('c3 02 12 40',' ')) from dual; --转成成十进制 UTL_RAW.CAST_TO_NUMBER(REPLACE('C3021240','')) ---------------------------------------------- 11763 BBED> d /v offset 1955 count 32 ------注意1955的来源 File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 78302 Offsets: 1955 to 1986 Dba:0x004131de ------------------------------------------------------- 00000041 574600e8 04c30211 19010000 l ...AWF.毃...... 40012100 0c04c302 111a0000 00415746 l @.!...n.....AWF <16 bytes per line> SQL> select 1955+20+24+24*3+8 from dual; --索引加124 1955+20+24+24*3+8 ----------------- 2079 BBED> d /v offset 2079 count 32 File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 78302 Offsets: 2079 to 2110 Dba:0x004131de ------------------------------------------------------- 04c30212 40000000 41574700 6004c302 l .n.@...AWG.`.n 123e0100 00400121 000c04c3 02123f00 l .>...@.!...n.?. <16 bytes per line> BBED> modify /x 41 offset 2083 Warning: contents of previous BIFILE will be lost. Proceed? (Y/N) y File: /u01/app/oracle/oradata/orcl/system01.dbf (1) Block: 78302 Offsets: 2083 to 2114 Dba:0x004131de ------------------------------------------------------------------------ 41000000 41574700 6004c302 123e0100 00400121 000c04c3 02123f00 00004157 <32 bytes per line> BBED> sum apply Check value for File 1, Block 78302: current = 0x35c8, required = 0x35c8
--重启db，并重建索引
-重启 SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup ORACLE instance started. Total System Global Area 784998400 bytes Fixed Size 2257352 bytes Variable Size 478154296 bytes Database Buffers 297795584 bytes Redo Buffers 6791168 bytes Database mounted. Database opened. --修改为2个值一样 SQL> select /*+ FULL(t1) */ owner#,name,con# from con$ t1 WHERE NAME='_NEXT_CONSTRAINT'; OWNER# NAME CON# ---------- ------------------------------ ---------- 0 _NEXT_CONSTRAINT 11764 SQL> select /*+ index(t1 I_CON2) */ owner#,name,con# from con$ t1 WHERE NAME='_NEXT_CONSTRAINT'; OWNER# NAME CON# ---------- ------------------------------ ---------- 0 _NEXT_CONSTRAINT 11764 SQL> conn test/*** Connected. SQL> alter table yhq_test add primary key(id); Table altered. SQL> select CONSTRAINT_NAME from dba_constraints where table_name='YHQ_TEST'; CONSTRAINT_NAME ------------------------------ SYS_C0011764
---正常。