标签归档：lmebucp

12.2数据库启动报ORA-07445 lmebucp错误

发表于 2020 年 5 月 13 日由惜分飞

有一个客户找到我们,说他们是数据库启动之时报的错误和数据库不能open 报ORA-7445 lmebucp错类似,让我们对其进行恢复支持,通过分析确定客户数据库版本为12.2.0.1

Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Productio
PL/SQL Release 12.2.0.1.0 - Production	
CORE 12.2.0.1.0 Production	
TNS for Linux: Version 12.2.0.1.0 - Production	
NLSRTL Version 12.2.0.1.0 - Production

alert日志报错

--最初报错
2020-05-11T03:43:06.787164+08:00
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_m004_3253.trc  (incident=639048):
ORA-00600: 内部错误代码, 参数: [kkpo_rcinfo_defstg:delseg], [72280], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl/incident/incdir_639048/orcl_m004_3253_i639048.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
2020-05-11T03:43:14.250993+08:00
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_m004_3253.trc  (incident=639049):
ORA-00600: 内部错误代码, 参数: [kkpo_rcinfo_defstg:delseg], [72280], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl/incident/incdir_639049/orcl_m004_3253_i639049.trc
2020-05-11T03:43:21.286310+08:00
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 /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_m004_3253.trc  (incident=639050):
ORA-00600: 内部错误代码, 参数: [kkpo_rcinfo_defstg:delseg], [72280], [], [], [], [], [], [], [], [], [], []
ORA-06512: 在 line 2
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl/incident/incdir_639050/orcl_m004_3253_i639050.trc
2020-05-11T03:43:28.059048+08:00
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
2020-05-11T03:43:28.074681+08:00
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_m004_3253.trc:
ORA-00600: 内部错误代码, 参数: [kkpo_rcinfo_defstg:delseg], [72280], [], [], [], [], [], [], [], [], [], []
ORA-06512: 在 line 2
2020-05-11T08:31:22.416087+08:00
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_j000_16511.trc:
ORA-12012: 自动执行作业 141 出错
ORA-30732: 表中不包含用户可见的列
ORA-06512: 在 line 1


---关闭数据库之后重启报错
2020-05-11T09:42:43.234769+08:00
ALTER DATABASE OPEN
2020-05-11T09:42:44.353085+08:00
Ping without log force is disabled:
  instance mounted in exclusive mode.
Endian type of dictionary set to little
2020-05-11T09:42:44.660388+08:00
TT00: Gap Manager starting (PID:31134)
2020-05-11T09:42:45.180876+08:00
Thread 1 opened at log sequence 78596
  Current log# 2 seq# 78596 mem# 0: /u01/app/oracle/oradata/orcl/redo02.log
Successful open of redo thread 1
2020-05-11T09:42:45.181357+08:00
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Exception [type: SIGSEGV, Address not mapped to object][ADDR:0x0][PC:0x10F4C112, lmebucp()+34][flags: 0x0, count: 1]
Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_ora_31125.trc  (incident=646445):
ORA-07445: exception encountered:core dump[lmebucp()+34][SIGSEGV][ADDR:0x0][PC:0x10F4C112][Address not mapped to object]
Incident details in: /u01/app/oracle/diag/rdbms/orcl/orcl/incident/incdir_646445/orcl_ora_31125_i646445.trc
Use ADRCI or Support Workbench to package the incident.
See Note 411.1 at My Oracle Support for error and packaging details.
2020-05-11T09:42:46.070049+08:00
*****************************************************************
An internal routine has requested a dump of selected redo.
This usually happens following a specific internal error, when
analysis of the redo logs will help Oracle Support with the
diagnosis.
It is recommended that you retain all the redo logs generated (by
all the instances) during the past 12 hours, in case additional
redo dumps are required to help with the diagnosis.
*****************************************************************
2020-05-11T09:42:53.344955+08:00
Instance Critical Process (pid: 41, ospid: 31125) died unexpectedly
PMON (ospid: 31026): terminating the instance due to error 12752
2020-05-11T09:42:53.377209+08:00
System state dump requested by (instance=1, osid=31026 (PMON)), summary=[abnormal instance termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_diag_31046_20200511094253.trc
2020-05-11T09:42:56.690224+08:00
Instance terminated by PMON, pid = 31026

对启动过程做10046跟踪

PARSING IN CURSOR #139821999713040 len=65 dep=1 uid=0 oct=3 lid=0 
tim=2200910467 hv=1762642493 ad='1bfd79130'sqlid='aps3qh1nhzkjx'
select line#, sql_text from bootstrap$ where obj# not in (:1, :2)
END OF STMT
PARSE #139821999713040:c=378,e=378,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,plh=0,tim=2200910467
BINDS #139821999713040:

 Bind#0
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=1000001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=7f2ad89fe6c8  bln=22  avl=02  flg=05
  value=59
 Bind#1
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=1000001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=7f2ad89fe698  bln=24  avl=06  flg=05
  value=4294967295
EXEC #139821999713040:c=219,e=658,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,plh=867914364,tim=2200911218
WAIT #139821999713040: nam='db file sequential read' ela= 9 file#=1 block#=520 blocks=1 obj#=59 tim=2200911300
WAIT #139821999713040: nam='db file scattered read' ela= 19 file#=1 block#=521 blocks=3 obj#=59 tim=2200911559
FETCH #139821999713040:c=404,e=404,p=4,cr=5,cu=0,mis=0,r=0,dep=1,og=4,plh=867914364,tim=2200911646
STAT #139821999713040 id=1 cnt=0 pid=0 pos=1 obj=59 op='TABLE ACCESS FULL BOOTSTRAP$ (cr=5 pr=4 pw=0 str=1 time=406 us)'

*** 2020-05-11T12:25:30.977832+08:00
Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x0] [PC:0x10F4C112, lmebucp()+34] [flags: 0x0, count: 1]
2020-05-11T12:25:31.026914+08:00
Incident 718445 created, dump file:/u01/app/oracle/diag/rdbms/orcl/orcl/incident/incdir_718445/orcl_ora_14324_i718445.trc
ORA-07445: exception encountered:core dump [lmebucp()+34][SIGSEGV][ADDR:0x0][PC:0x10F4C112][Address not mapped to object]

根据该报错,可以大概定位数据库重启之后报ORA-07445 lmebucp()+34错误不能正常启动是由于bootstrap$表异常导致.

BBED> p kcvfhrdb
ub4 kcvfhrdb                                @96       0x00400208

BBED> set block 523
        BLOCK#          523

BBED> map
 File: F:\temp\12.2\1\system01.dbf (0)
 Block: 523                                   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[20]                               @86

 ub1 freespace[1015]                        @126

 ub1 rowdata[7047]                          @1141

 ub4 tailchk                                @8188

BBED> p *kdbr[1]
rowdata[6431]
-------------
ub1 rowdata[6431]                           @7572     0x3c

BBED> x /rnnc
rowdata[6431]                               @7572
-------------
flag@7572: 0x3c (KDRHFL, KDRHFF, KDRHFD, KDRHFH)
lock@7573: 0x01
cols@7574:    0

通过bbed定位rootdba,然后dump相关block,随机找一条记录,确认bootstrap表无后效记录.但是该数据库在重启之前已经报了ORA-600 kkpo_rcinfo_defstg:delseg和ORA-30732错误,很可能还有其他的基表异常.通过先修复bootstrap$记录,然后根据该表中记录分析其他相关表记录,最终确定tab$中记录也异常,通过bbed 批量循环修复方法,对其进行恢复,open数据库,可以验证数据没有问题.至此该问题解决,但是没有找出来故障原因(是人为破坏【直接人工删除】,还是某种工具带入恶意脚本导致,类似:plsql dev引起的数据库被黑勒索比特币实现原理分析和解决方案,亦或者是数据库安装介质带有恶意程序,类似:警告：互联网中有oracle介质被注入恶意程序导致—ORA-600 16703)

发表在 Oracle备份恢复 | 标签为 kkpo_rcinfo_defstg:delseg, lmebucp, ORA-007445 lmebucp, ORA-30732 | 评论关闭

由于bootstrap$异常导致数据库启动报ORA-03113 ORA-07445 lmebucp

发表于 2018 年 8 月 27 日由惜分飞

数据库无法正常启动，报ORA-03113

SQL> startup
ORACLE 例程已经启动。

Total System Global Area 5016387584 bytes
Fixed Size                  2011136 bytes
Variable Size             905969664 bytes
Database Buffers         4093640704 bytes
Redo Buffers               14766080 bytes
数据库装载完毕。
ORA-03113: 通信通道的文件结束

alert日志报错ORA-07445 lmebucp

Mon Aug 27 15:31:37 2018
Thread 1 advanced to log sequence 21691
Thread 1 opened at log sequence 21691
  Current log# 2 seq# 21691 mem# 0: /data/oracle/orcl/redo02.log
Successful open of redo thread 1
Mon Aug 27 15:31:37 2018
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Mon Aug 27 15:31:37 2018
SMON: enabling cache recovery
Mon Aug 27 15:31:37 2018
Errors in file /home/oracle/oracle/product/10.2.0/db_1/admin/orcl/udump/orcl_ora_5827.trc:
ORA-07445: exception encountered: core dump [lmebucp()+24] [SIGSEGV] 
[Address not mapped to object] [0x000000000] [] []

跟踪启动10046 trace

WAIT #1: nam='instance state change' ela= 822 layer=2 value=1 waited=1 obj#=-1 tim=1499370211971345
WAIT #1: nam='db file sequential read' ela= 29 file#=1 block#=257 blocks=1 obj#=-1 tim=1499370211971896
=====================
PARSING IN CURSOR #2 len=188 dep=1 uid=0 oct=1 lid=0 tim=1499370211972625 hv=2809067040 ad='b5fe2d00'
create table bootstrap$ ( line#         number not null,   obj#           
number not null,   sql_text   varchar2(4000) not null)   
storage (initial 50K objno 41 extents (file 1 block 257))
END OF STMT
PARSE #2:c=0,e=598,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=1499370211972621
BINDS #2:
EXEC #2:c=1000,e=195,p=0,cr=0,cu=0,mis=0,r=0,dep=1,og=4,tim=1499370211972873
=====================
PARSING IN CURSOR #2 len=55 dep=1 uid=0 oct=3 lid=0 tim=1499370211973429 hv=2111436465 ad='b7bd0530'
select line#, sql_text from bootstrap$ where obj# != :1
END OF STMT
PARSE #2:c=0,e=472,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=1499370211973426
BINDS #2:
kkscoacd
 Bind#0
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=2b8c5d50a4d0  bln=22  avl=02  flg=05
  value=41
EXEC #2:c=1000,e=838,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=1499370211974375
WAIT #2: nam='db file sequential read' ela= 27 file#=1 block#=257 blocks=1 obj#=-1 tim=1499370211974522
WAIT #2: nam='db file sequential read' ela= 21 file#=1 block#=258 blocks=1 obj#=-1 tim=1499370211974855
FETCH #2:c=1000,e=479,p=2,cr=3,cu=0,mis=0,r=0,dep=1,og=4,tim=1499370211974908
Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object),
 addr: 0x0, PC: [0x348772c, lmebucp()+24]
*** 2018-08-27 15:31:37.074
ksedmp: internal or fatal error
ORA-07445: exception encountered: core dump [lmebucp()+24] [SIGSEGV] 
[Address not mapped to object] [0x000000000] [] []
Current SQL statement for this session:
alter database open
----- Call Stack Trace -----
calling              call     entry                argument values in hex      
location             type     point                (? means dubious value)     
-------------------- -------- -------------------- ----------------------------
Cannot find symbol
Cannot find symbol
Cannot find symbol
ksedst()+31          call     ksedst1()            000000001 ? 000000001 ?
                                                   000000000 ? 000000000 ?
                                                   000000000 ? 000000001 ?
ksedmp()+610         call     ksedst()             000000001 ? 000000001 ?
                                                   000000000 ? 000000000 ?
                                                   000000000 ? 000000001 ?
ssexhd()+630         call     ksedmp()             000000003 ? 000000001 ?
                                                   000000000 ? 000000000 ?
                                                   000000000 ? 000000001 ?
<0x336800eca0>       call     ssexhd()             00000000B ? 2B8C5D238D70 ?
                                                   2B8C5D238C40 ? 000000000 ?
                                                   000000000 ? 000000001 ?
 
--------------------- Binary Stack Dump ---------------------

通过这里发现，数据库启动执行select line#, sql_text from bootstrap$ where obj# != :1然后报ORA-07445 lmebucp错误。这样的错误比较诡异,一般可能是由于bootstrap异常导致,但是这里再往上跟踪发现 create bootstrap$表指定的记录为file 1 block 257,根据经验知道数据库的bootstrap$表记录一般是377 或者520比较常见.通过工具对于file 1进行分析

DUL> dump datafile 1 block 257
Block Header:
block type=0x10 (data segment header block (unlimited extents))
block format=0xa2 (oracle 10)
block rdba=0x00400101 (file#=1, block#=257)
scn=0x0000.0000007e, seq=1, tail=0x007e1001
block checksum value=0xe75c=59228, flag=4
Data Segment Header:
  Extent Control Header
  -------------------------------------------------------------
  Extent Header:: extents: 1  blocks: 7
                  last map: 0x00000000  #maps: 0  offset: 4128
      Highwater:: 0x00400103  (rfile#=1,block#=259)
                  ext#: 0  blk#: 1   ext size:7
      #blocks in seg. hdr's freelists: 0
      #blocks below: 1
      mapblk: 0x00000000   offset: 0
      Map Header:: next: 0x00000000   #extents: 1  obj#: 41  flag: 0x40000000
  Extent Control Header
  -------------------------------------------------------------
   0x00400102  length: 7

  nfl = 1, nfb = 1, typ = 2, nxf = 0, ccnt = 0
  SEG LST:: flg:UNUSED lhd: 0x00000000 ltl: 0x00000000

发现异常比较明显,block 257为data_object_id=41,也就是
41|41|CREATE UNIQUE INDEX I_FILE1 ON FILE$(FILE#) PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE ( INITIAL 64K NEXT 1024K MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 OBJNO 41 EXTENTS (FILE 1 BLOCK 257))
这里看数据库的引导异常或者bootstrap$表中记录异常.通过修复bootstrap相关内容,数据库完美启动

发表在非常规恢复 | 标签为 lmebucp, ORA-03113, ORA-07445 lmebucp | 评论关闭

数据库不能open 报ORA-7445 lmebucp错

发表于 2018 年 4 月 8 日由惜分飞

有一个朋友数据库启动报错ORA-03113

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi
PL/SQL Release 10.2.0.5.0 - Production
CORE    10.2.0.5.0      Production
TNS for Linux: Version 10.2.0.5.0 - Production
NLSRTL Version 10.2.0.5.0 - Production

SQL> startup
ORACLE instance started.

Total System Global Area 1610612736 bytes
Fixed Size                  2096632 bytes
Variable Size             385876488 bytes
Database Buffers         1207959552 bytes
Redo Buffers               14680064 bytes
Database mounted.
ORA-03113: end-of-file on communication channel

alert日志报ORA-7445 lmebucp()+24错误

Sun Apr 08 08:05:07 CST 2018
ALTER DATABASE   MOUNT
Sun Apr 08 08:05:11 CST 2018
Setting recovery target incarnation to 2
Sun Apr 08 08:05:11 CST 2018
Successful mount of redo thread 1, with mount id 2650526067
Sun Apr 08 08:05:11 CST 2018
Database mounted in Exclusive Mode
Completed: ALTER DATABASE   MOUNT
Sun Apr 08 08:05:11 CST 2018
ALTER DATABASE OPEN
Sun Apr 08 08:05:11 CST 2018
Thread 1 opened at log sequence 1
  Current log# 1 seq# 1 mem# 0: /u01/app/oracle/oradata/t10g/redo01.log
Successful open of redo thread 1
Sun Apr 08 08:05:11 CST 2018
MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
Sun Apr 08 08:05:11 CST 2018
SMON: enabling cache recovery
Sun Apr 08 08:05:11 CST 2018
Errors in file /u01/app/oracle/admin/t10g/udump/t10g_ora_32810.trc:
ORA-07445: exception encountered: core dump [lmebucp()+24] [SIGSEGV] [Address not mapped to object] [0x000000000] [] []

对应trace文件

Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object), addr: 0x0, PC: [0x37e6418, lmebucp()+24]
*** 2014-04-08 08:05:11.793
ksedmp: internal or fatal error
ORA-07445: exception encountered: core dump [lmebucp()+24] [SIGSEGV] [Address not mapped to object] [0x000000000] [] []
Current SQL statement for this session:
ALTER DATABASE OPEN
----- Call Stack Trace -----
calling              call     entry                argument values in hex
location             type     point                (? means dubious value)
-------------------- -------- -------------------- ----------------------------
ksedst()+31          call     ksedst1()            000000000 ? 000000001 ?
                                                   7F4238A22BD0 ? 7F4238A22C30 ?
                                                   7F4238A22B70 ? 000000000 ?
ksedmp()+610         call     ksedst()             000000000 ? 000000001 ?
                                                   7F4238A22BD0 ? 7F4238A22C30 ?
                                                   7F4238A22B70 ? 000000000 ?
ssexhd()+629         call     ksedmp()             000000003 ? 000000001 ?
                                                   7F4238A22BD0 ? 7F4238A22C30 ?
                                                   7F4238A22B70 ? 000000000 ?
__restore_rt()+0     call     ssexhd()             00000000B ? 7F4238A23BF0 ?
                                                   7F4238A23AC0 ? 7F4238A22C30 ?
                                                   7F4238A22B70 ? 000000000 ?
lmebucp()+24         signal   __restore_rt()       000000000 ? 000008C00 ?
                                                   7FFF0F778790 ? 000000009 ?
                                                   000000000 ? 00000000D ?
kqlbebs()+1468       call     lmebucp()            000000000 ? 000008C00 ?
                                                   7FFF0F778790 ? 000000009 ?
                                                   000000000 ? 00000000D ?
kqlblfc()+172        call     kqlbebs()            000000000 ? 0BC119DE0 ?
                                                   7FFF0F778790 ? 000000009 ?
                                                   000000000 ? 00000000D ?
adbdrv()+58009       call     kqlblfc()            000000000 ? 7FFF0F77F610 ?
                                                   7FFF0F778790 ? 000000009 ?
                                                   000000000 ? 00000000D ?
opiexe()+13745       call     adbdrv()             000000000 ? 7FFF0F77F610 ?
                                                   0B9FFF9A8 ? 000000009 ?
                                                   000000000 ? 00000000D ?
opiosq0()+3398       call     opiexe()             000000004 ? 000000000 ?
                                                   7FFF0F7807CC ? 000000001 ?
                                                   000000000 ? 00000000D ?
kpooprx()+318        call     opiosq0()            000000003 ? 00000000E ?
                                                   7FFF0F780AF8 ? 0000000A4 ?
                                                   000000000 ? 600000013 ?
kpoal8()+783         call     kpooprx()            7FFF0F783CDC ? 7FFF0F781D30 ?
                                                   000000013 ? 000000001 ?
                                                   000000000 ? 600000013 ?
opiodr()+1184        call     kpoal8()             00000005E ? 000000017 ?
                                                   7FFF0F783CD8 ? 000000001 ?
                                                   000000001 ? 600000013 ?
ttcpip()+1226        call     opiodr()             00000005E ? 000000017 ?
                                                   7FFF0F783CD8 ? 000000000 ?
                                                   005BEBD70 ? 600000013 ?
opitsk()+1310        call     ttcpip()             006AF1FB0 ? 0054A6760 ?
                                                   7FFF0F783CD8 ? 000000000 ?
                                                   7FFF0F7837D8 ? 7FFF0F783E40 ?
opiino()+1024        call     opitsk()             000000003 ? 000000000 ?
                                                   7FFF0F783CD8 ? 000000001 ?
                                                   000000000 ? 721000200000001 ?
opiodr()+1184        call     opiino()             00000003C ? 000000004 ?
                                                   7FFF0F784ED8 ? 000000001 ?
                                                   000000000 ? 721000200000001 ?
opidrv()+548         call     opiodr()             00000003C ? 000000004 ?
                                                   7FFF0F784ED8 ? 000000000 ?
                                                   005BEB820 ? 721000200000001 ?
sou2o()+114          call     opidrv()             00000003C ? 000000004 ?
                                                   7FFF0F784ED8 ? 000000000 ?
                                                   005BEB820 ? 721000200000001 ?
opimai_real()+163    call     sou2o()              7FFF0F784EB0 ? 00000003C ?
                                                   000000004 ? 7FFF0F784ED8 ?
                                                   005BEB820 ? 721000200000001 ?
main()+116           call     opimai_real()        000000002 ? 7FFF0F784F40 ?
                                                   000000004 ? 7FFF0F784ED8 ?
                                                   005BEB820 ? 721000200000001 ?
__libc_start_main()  call     main()               000000002 ? 7FFF0F784F40 ?
+244                                               000000004 ? 7FFF0F784ED8 ?
                                                   005BEB820 ? 721000200000001 ?
_start()+41          call     __libc_start_main()  00072D108 ? 000000002 ?
                                                   7FFF0F785098 ? 000000000 ?
                                                   005BEB820 ? 000000002 ?

--------------------- Binary Stack Dump ---------------------

10046定位语句

SQL> staRTUP MOUNT
ORACLE instance started.

Total System Global Area 1610612736 bytes
Fixed Size                  2096632 bytes
Variable Size             385876488 bytes
Database Buffers         1207959552 bytes
Redo Buffers               14680064 bytes
Database mounted.
SQL> oradebug setmypid
Statement processed.
SQL> alter session set events '10046 trace name context forever, level 12';

Session altered.

SQL> oradebug tracefile_name
/u01/app/oracle/admin/t10g/udump/t10g_ora_32908.trc
SQL> alter database open;
ERROR:
ORA-03113: end-of-file on communication channel


SQL> 


PARSING IN CURSOR #2 len=55 dep=1 uid=0 oct=3 lid=0 tim=1463569438249596 hv=2111436465 ad='beb13e10'
select line#, sql_text from bootstrap$ where obj# != :1
END OF STMT
PARSE #2:c=0,e=471,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=1463569438249594
BINDS #2:
kkscoacd
 Bind#0
  oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00
  oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0
  kxsbbbfp=7f8f940fadc0  bln=22  avl=02  flg=05
  value=56
EXEC #2:c=2000,e=61246,p=0,cr=0,cu=0,mis=1,r=0,dep=1,og=4,tim=1463569438310929
WAIT #2: nam='db file sequential read' ela= 41 file#=1 block#=377 blocks=1 obj#=56 tim=1463569438311099
WAIT #2: nam='db file scattered read' ela= 73 file#=1 block#=378 blocks=3 obj#=56 tim=1463569438311528
FETCH #2:c=1000,e=775,p=4,cr=5,cu=0,mis=0,r=0,dep=1,og=4,tim=1463569438311772
Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object), addr: 0x0, PC: [0x37e6418, lmebucp()+24]
*** 2018-04-08 08:11:44.840
ksedmp: internal or fatal error
ORA-07445: exception encountered: core dump [lmebucp()+24] [SIGSEGV] [Address not mapped to object] [0x000000000] [] []
Current SQL statement for this session:
alter database open

通过这里基本上可以定位，报错是由于bootstrap$中对象异常导致。由于该对象比较特殊,使用一些特殊方法进行处理,数据库正常启动成功。如果需要相关技术支持请联系我们，提供专业ORACLE数据库恢复技术支持
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