标签归档：kcratr_scan_lastbwr

ORA-00756 ORA-10567故障数据0丢失恢复

发表于 2025 年 6 月 29 日 由 惜分飞

客户虚拟化故障修复之后,数据库启动报ORA-600 kcratr_scan_lastbwr错误
kcratr_scan_lastbwr

这个是一个比较常见的错误,一般recover 下就ok了,但是有些时候会出现ORA-600 3020或者类似ORA-00756 ORA-10567的错误,比如这次不幸就遇到了该错误

SQL> recover database;
ORA-00283: recovery session canceled due to errors
ORA-00756: recovery detected a lost write of a data block
ORA-10567: Redo is inconsistent with data block (file# 10, block# 4005760, file
offset is 2750414848 bytes)
ORA-10564: tablespace PACS55
ORA-01110: data file 10: '/u02/oradata/pacsdb/pacs55.4.dbf'
ORA-10561: block type 'TRANSACTION MANAGED INDEX BLOCK', data object# 76649

然后尝试单个文件recover恢复

SQL> recover datafile 10;
ORA-00283: recovery session canceled due to errors
ORA-00756: recovery detected a lost write of a data block
ORA-10567: Redo is inconsistent with data block (file# 10, block# 4005760, file
offset is 2750414848 bytes)
ORA-10564: tablespace PACS55
ORA-01110: data file 10: '/u02/oradata/pacsdb/pacs55.4.dbf'
ORA-10561: block type 'TRANSACTION MANAGED INDEX BLOCK', data object# 76649

SQL> recover datafile 9;
ORA-00283: recovery session canceled due to errors
ORA-00756: recovery detected a lost write of a data block
ORA-10567: Redo is inconsistent with data block (file# 9, block# 4158754, file
offset is 4003741696 bytes)
ORA-10564: tablespace PACS55
ORA-01110: data file 9: '/u02/oradata/pacsdb/pacs55.3.dbf'
ORA-10561: block type 'TRANSACTION MANAGED INDEX BLOCK', data object# 76660

通过dbv检查这两个异常文件

[oracle@oradb ~]$ dbv file=/u02/oradata/pacsdb/pacs55.3.dbf

DBVERIFY: Release 19.0.0.0.0 - Production on Sat Jun 28 23:02:15 2025

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /u02/oradata/pacsdb/pacs55.3.dbf


DBVERIFY - Verification complete

Total Pages Examined         : 4194302
Total Pages Processed (Data) : 2482487
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 1655515
Total Pages Failing   (Index): 0
Total Pages Processed (Lob)  : 25017
Total Pages Failing   (Lob)  : 0
Total Pages Processed (Other): 15919
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 15364
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 311133131196 (72.1895485884)
[oracle@oradb ~]$ dbv file=/u02/oradata/pacsdb/pacs55.4.dbf 

DBVERIFY: Release 19.0.0.0.0 - Production on Sat Jun 28 23:04:59 2025

Copyright (c) 1982, 2019, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /u02/oradata/pacsdb/pacs55.4.dbf


DBVERIFY - Verification complete

Total Pages Examined         : 4194302
Total Pages Processed (Data) : 2466409
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 1683244
Total Pages Failing   (Index): 0
Total Pages Processed (Lob)  : 16977
Total Pages Failing   (Lob)  : 0
Total Pages Processed (Other): 15909
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 11763
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 311133133727 (72.1895488415)

确定数据文件本身没有坏块,只是redo写丢失或者某种bug导致少量block应用redo的时候异常,而且报错是index,直接通过底层处理报错的block,让其这些报错的block直接不应用日志,然后完成recover操作,其他数据块数据不会丢失(最大限度减少损失,而不是直接修改文件头scn,或者强制拉库的方式来处理)

SQL> select file#,fuzzy from v$datafile_header;

     FILE# FUZ
---------- ---
	 1 NO
	 2 NO
	 3 NO
	 4 NO
	 5 NO
	 7 NO
	 8 NO
	 9 YES
	10 YES
	11 NO
	12 NO

     FILE# FUZ
---------- ---
	13 NO
	14 NO
	15 NO
	16 NO
	17 NO
	18 NO
	19 NO

18 rows selected.

SQL> recover  datafile 9 ;
Media recovery complete.
SQL> recover  datafile 10 ;
ORA-00283: recovery session canceled due to errors
ORA-00756: recovery detected a lost write of a data block
ORA-10567: Redo is inconsistent with data block (file# 10, block# 3822912, file
offset is 1252524032 bytes)
ORA-10564: tablespace PACS55
ORA-01110: data file 10: '/u02/oradata/pacsdb/pacs55.4.dbf'
ORA-10561: block type 'TRANSACTION MANAGED INDEX BLOCK', data object# 76649
 
SQL> recover  datafile 10;
Media recovery complete.

正常open数据库成功,并rebuild 异常的对象

SQL> alter database open;

Database altered.

SQL> select owner,object_name,object_type from dba_objects where data_object_id in(76649,76660);

OWNER
--------------------------------------------------------------------------------
OBJECT_NAME
--------------------------------------------------------------------------------
OBJECT_TYPE
-----------------------
PACS55
STUDYINFO_DIAGRPTID
INDEX

PACS55
PACS_STUDYINFO_PK
INDEX

OWNER
--------------------------------------------------------------------------------
OBJECT_NAME
--------------------------------------------------------------------------------
OBJECT_TYPE
-----------------------


SQL> alter index PACS55.STUDYINFO_DIAGRPTID rebuild online parallel 4;

Index altered.

SQL> alter index PACS55.PACS_STUDYINFO_PK rebuild online parallel 4;

Index altered.

SQL> 
SQL> 
SQL> 
SQL> alter index PACS55.STUDYINFO_DIAGRPTID noparallel;
alter index PACS55.PACS_STUDYINFO_PK noparallel;
Index altered.

SQL> 

Index altered.

至此该库完美恢复业务可以直接使用,业务数据0丢失.这次运气比较好,如果是表数据异常,可能会麻烦一点,但是也可以最大限度恢复(肯定比强制拉库,或者修改文件头的方式效果好)

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数据库open报ORA-600 kcratr_scan_lastbwr故障处理

发表于 2024 年 5 月 30 日 由 惜分飞

由于断电，导致数据库正常open报ORA-600 kcratr_scan_lastbwr错误

Wed Jan 17 18:23:26 2024
ALTER DATABASE   MOUNT
Successful mount of redo thread 1, with mount id 1028618590
Database mounted in Exclusive Mode
Lost write protection disabled
Completed: ALTER DATABASE   MOUNT
Wed Jan 17 18:23:30 2024
ALTER DATABASE OPEN
Beginning crash recovery of 1 threads
 parallel recovery started with 32 processes
Started redo scan
Hex dump of (file 3, block 144) in trace file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_66361.trc
Reading datafile '/database/oracle/app/oracle/oradata/xff/datafile/o1_mf_undotbs1_hct7001s_.dbf' 
  for corruption at rdba: 0x00c00090 (file 3, block 144)
Reread (file 3, block 144) found same corrupt data (logically corrupt)
Write verification failed for File 3 Block 144 (rdba 0xc00090)
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_66361.trc  (incident=672241):
ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr], [], [], [], [], []
Incident details in: /database/oracle/app/oracle/diag/rdbms/xff/xff/incident/incdir_672241/xff_ora_66361_i672241.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Aborting crash recovery due to error 600
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_66361.trc:
ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr], [], [], [], [], []
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_66361.trc:
ORA-00600: internal error code, arguments: [kcratr_scan_lastbwr], [], [], [], [], []
ORA-600 signalled during: ALTER DATABASE OPEN...

尝试recover 数据库报ORA-600 3020错误

Wed Jan 17 18:28:38 2024
ALTER DATABASE RECOVER  database  
Media Recovery Start
 started logmerger process
Parallel Media Recovery started with 96 slaves
Wed Jan 17 18:28:41 2024
Recovery of Online Redo Log: Thread 1 Group 2 Seq 410864 Reading mem 0
  Mem# 0: /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_2_hct740hq_.log
Wed Jan 17 18:28:42 2024
ORA-00600: internal error code, arguments: [3020], [3], [240], [12583152], [], []
ORA-10567: Redo is inconsistent with data block (file# 3, block# 240, file offset is 1966080 bytes)
ORA-10564: tablespace UNDOTBS1
ORA-01110: data file 3: '/database/oracle/app/oracle/oradata/xff/datafile/o1_mf_undotbs1_hct7001s_.dbf'
ORA-10560: block type 'KTU SMU HEADER BLOCK'
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Slave exiting with ORA-600 exception
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_pr19_68212.trc:
ORA-00600: internal error code, arguments: [3020], [3], [240], [12583152], [], []
ORA-10567: Redo is inconsistent with data block (file# 3, block# 240, file offset is 1966080 bytes)
ORA-10564: tablespace UNDOTBS1
ORA-01110: data file 3: '/database/oracle/app/oracle/oradata/xff/datafile/o1_mf_undotbs1_hct7001s_.dbf'
ORA-10560: block type 'KTU SMU HEADER BLOCK'
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_68038.trc  (incident=672243):
ORA-00600: internal error code, arguments: [3020], [3], [240], [12583152], [], []
ORA-10567: Redo is inconsistent with data block (file# 3, block# 240, file offset is 1966080 bytes)
ORA-10564: tablespace UNDOTBS1
ORA-01110: data file 3: '/database/oracle/app/oracle/oradata/xff/datafile/o1_mf_undotbs1_hct7001s_.dbf'
ORA-10560: block type 'KTU SMU HEADER BLOCK'
Wed Jan 17 18:28:43 2024
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Recovery Slave PR19 previously exited with exception 600
Wed Jan 17 18:28:43 2024
Sweep [inc][672865]: completed
Media Recovery failed with error 448
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_pr00_68115.trc:
ORA-00283: recovery session canceled due to errors
ORA-00448: normal completion of background process
ORA-600 signalled during: ALTER DATABASE RECOVER  database  ...

加上隐含参数尝试强制拉库

alter database open resetlogs
RESETLOGS is being done without consistancy checks. This may result
in a corrupted database. The database should be recreated.
RESETLOGS after incomplete recovery UNTIL CHANGE 6165467436
Clearing online redo logfile 1 /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_1_hct740fp_.log
Clearing online log 1 of thread 1 sequence number 0
Clearing online redo logfile 1 complete
Clearing online redo logfile 2 /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_2_hct740hq_.log
Clearing online log 2 of thread 1 sequence number 0
Clearing online redo logfile 2 complete
Clearing online redo logfile 3 /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_3_hct740k7_.log
Clearing online log 3 of thread 1 sequence number 0
Clearing online redo logfile 3 complete
Online log /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_1_hct740fp_.log: Thread 1 Group 1 was previously cleared
Online log /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_2_hct740hq_.log: Thread 1 Group 2 was previously cleared
Online log /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_3_hct740k7_.log: Thread 1 Group 3 was previously cleared
Fri Jan 19 09:24:59 2024
Setting recovery target incarnation to 2
Initializing SCN for created control file
Database SCN compatibility initialized to 3
Warning - High Database SCN: Current SCN value is 6165467439, threshold SCN value is 0
If you have not previously reported this warning on this database,
  please notify Oracle Support so that additional diagnosis can be performed.
Fri Jan 19 09:24:59 2024
Assigning activation ID 1028784413 (0x3d52011d)
Thread 1 opened at log sequence 1
  Current log# 1 seq# 1 mem# 0: /database/oracle/app/oracle/oradata/xff/onlinelog/o1_mf_1_hct740fp_.log
Successful open of redo thread 1
Fri Jan 19 09:24:59 2024
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Fri Jan 19 09:24:59 2024
SMON: enabling cache recovery
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_84860.trc  (incident=1344255):
ORA-00600: internal error code, arguments: [2662], [1], [1870500147], [1], [1870515285], [12583040]
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_84860.trc:
ORA-00600: internal error code, arguments: [2662], [1], [1870500147], [1], [1870515285], [12583040]
Errors in file /database/oracle/app/oracle/diag/rdbms/xff/xff/trace/xff_ora_84860.trc:
ORA-00600: internal error code, arguments: [2662], [1], [1870500147], [1], [1870515285], [12583040]
Error 600 happened during db open, shutting down database
USER (ospid: 84860): terminating the instance due to error 600
Instance terminated by USER, pid = 84860
ORA-1092 signalled during: alter database open resetlogs...

客户自行恢复到这一步,后面无法处理,接手之后进行恢复，其实后面比较简单了，就是修改下数据库scn,数据库就可以open起来,然后处理异常的undo和对象即可,可以参考以前类似文章:
ORA-600 2662快速恢复之Patch scn工具
硬件故障导致ORA-600 2662错误处理
ORA-00600 [2662]和ORA-00600 [4194]恢复
更多参考:惜分飞blog中ORA-600 2662文章

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ora-600 kcratr_scan_lastbwr

发表于 2022 年 2 月 18 日 由 惜分飞

有客户数据库由于断电，导致启动报错ora-600 kcratr_scan_lastbwr错误

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for Linux: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production

alter database open
Beginning crash recovery of 1 threads
 parallel recovery started with 15 processes
Started redo scan
Hex dump of (file 4, block 3952129) in trace file D:\APP\ADMINISTRATOR\diag\rdbms\orcl\orcl\trace\orcl_ora_4500.trc
Reading datafile 'D:\APP\ADMINISTRATOR\ORADATA\ORCL\USERS01.DBF' for corruption at rdba:0x013c4e01(file 4,block 3952129)
Reread (file 4, block 3952129) found same corrupt data (logically corrupt)
Write verification failed for File 4 Block 3952129 (rdba 0x13c4e01)
Fri Feb 18 10:16:34 2022
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl\orcl\trace\orcl_ora_4500.trc  (incident=388961):
ORA-00600: ??????, ??: [kcratr_scan_lastbwr], [], [], [], [], [], [], [], [], [], [], []
Incident details in:D:\APP\ADMINISTRATOR\diag\rdbms\orcl\orcl\incident\incdir_388961\orcl_ora_4500_i388961.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
Aborting crash recovery due to error 600
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl\orcl\trace\orcl_ora_4500.trc:
ORA-00600: ??????, ??: [kcratr_scan_lastbwr], [], [], [], [], [], [], [], [], [], [], []
Errors in file D:\APP\ADMINISTRATOR\diag\rdbms\orcl\orcl\trace\orcl_ora_4500.trc:
ORA-00600: ??????, ??: [kcratr_scan_lastbwr], [], [], [], [], [], [], [], [], [], [], []
ORA-600 signalled during: alter database open...

根据MOS中的描述,这个问题主要出现在11.2.0.2之前版本中,但是本case发生在11.2.0.3的数据库中
20220218220920

ORA-600 [kcratr_scan_lastbwr] (Doc ID 1267231.1)描述,recover操作,数据库直接open,实现数据0丢失

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