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标题：ORA-07445: exception encountered: core dump [kdxlin()+4088]处理
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abort方式关闭数据库，启动报错
Tue Sep 19 21:52:56 2023
NOTE: dependency between database orcl and diskgroup resource ora.DATA.dg is established
Tue Sep 19 21:52:57 2023
Reconfiguration started (old inc 4, new inc 6)
List of instances:
1 (myinst: 1)
Global Resource Directory frozen
* dead instance detected - domain 0 invalid = TRUE
Communication channels reestablished
Master broadcasted resource hash value bitmaps
Non-local Process blocks cleaned out
Tue Sep 19 21:52:57 2023
Tue Sep 19 21:52:57 2023
LMS 3: 0 GCS shadows cancelled, 0 closed, 0 Xw survived
Tue Sep 19 21:52:57 2023
LMS 0: 0 GCS shadows cancelled, 0 closed, 0 Xw survived
LMS 1: 0 GCS shadows cancelled, 0 closed, 0 Xw survived
Tue Sep 19 21:52:57 2023
LMS 2: 0 GCS shadows cancelled, 0 closed, 0 Xw survived
Set master node info
Submitted all remote-enqueue requests
Dwn-cvts replayed, VALBLKs dubious
All grantable enqueues granted
Post SMON to start 1st pass IR
Submitted all GCS remote-cache requests
Post SMON to start 1st pass IR
Fix write in gcs resources
Reconfiguration complete
Tue Sep 19 21:53:05 2023
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl1/trace/orcl1_ora_28917.trc (incident=492333):
ORA-00600: internal error code, arguments: [2131], [33], [32], [], [], [], [], [], [], [], [], []
Incident details in:/u01/app/oracle/diag/rdbms/orcl/orcl1/incident/incdir_492333/orcl1_ora_28917_i492333.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
ORA-600 signalled during: ALTER DATABASE MOUNT /* db agent *//* {1:34652:2} */...
重建ctl之后，尝试recover数据库报错ORA-600 3020和ORA-07445 kdxlin等错误
SQL> recover database; ORA-00600: internal error code, arguments: [3020], [41], [3142531], [175108995], [], [], [], [], [], [], [], [] ORA-10567: Redo is inconsistent with data block (file# 41, block# 3142531, file offset is 4268777472 bytes) ORA-10564: tablespace XIFENFEI ORA-01110: data file 41: '+DATA/orcl/datafile/xifenfei07.dbf' ORA-10560: block type 'FIRST LEVEL BITMAP BLOCK'
Wed Sep 20 00:15:00 2023 ALTER DATABASE RECOVER database Media Recovery Start started logmerger process Parallel Media Recovery started with 64 slaves Wed Sep 20 00:15:02 2023 Recovery of Online Redo Log: Thread 2 Group 6 Seq 67008 Reading mem 0 Mem# 0: +DATA/orcl/onlinelog/group_6.268.942097791 Recovery of Online Redo Log: Thread 1 Group 2 Seq 81767 Reading mem 0 Mem# 0: +DATA/orcl/onlinelog/group_2.262.942097651 Recovery of Online Redo Log: Thread 1 Group 5 Seq 81768 Reading mem 0 Mem# 0: +DATA/orcl/onlinelog/group_5.263.942097651 Wed Sep 20 00:15:08 2023 Hex dump of (file 41, block 3142531) in trace file /u01/app/oracle/diag/rdbms/orcl/orcl1/trace/orcl1_pr1m_45463.trc Reading datafile '+DATA/orcl/datafile/ts_his3bz07.dbf' for corruption at rdba: 0x0a6ff383 (file 41, block 3142531) Reread (file 41, block 3142531) found different corrupt data (logically corrupt) Hex dump of (file 41, block 3142531) in trace file /u01/app/oracle/diag/rdbms/orcl/orcl1/trace/orcl1_pr1m_45463.trc Wed Sep 20 00:15:08 2023 Exception [type: SIGSEGV, Address not mapped to object][ADDR:0xC] [PC:0x95FB582, kdxlin()+4088][flags: 0x0,count:1] Wed Sep 20 00:15:08 2023 Exception [type: SIGSEGV, Address not mapped to object][ADDR:0xC] [PC:0x95FB582, kdxlin()+4088][flags: 0x0,count:1] Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl1/trace/orcl1_pr10_45419.trc (incident=564584): ORA-07445: exception encountered:core dump [kdxlin()+4088][SIGSEGV][ADDR:0xC][PC:0x95FB582][Address not mapped to object] Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl1/incident/incdir_564640/orcl1_pr17_45433_i564640.trc
尝试随机恢复文件，也遭遇ORA-07445 kdxlin异常
SQL> recover datafile 34; ORA-00283: recovery session canceled due to errors ORA-10562: Error occurred while applying redo to data block (file# 34, block# 1999809) ORA-10564: tablespace XIFENFEI ORA-01110: data file 34: '+DATA/orcl/datafile/xifeifenfei06' ORA-10561: block type 'TRANSACTION MANAGED INDEX BLOCK', data object# 97961 ORA-00607: Internal error occurred while making a change to a data block ORA-00602: internal programming exception ORA-07445: exception encountered: core dump [kdxlin()+4088] [SIGSEGV] [ADDR:0xC] [PC:0x95FB582] [Address not mapped to object] []
出现这种情况是由于redo和数据文件块不一致导致无法正常应用日志,人工对于异常的block进行处理,数据库open成功,然后遭遇undo回滚段异常,对其进行规避,数据库open并且稳定运行
