alert报错如下：

Exception [type: ACCESS_VIOLATION, UNABLE_TO_READ] [ADDR:0x0] [PC:0xB476E1A, lmebucp()+30]
ERROR: Unable to normalize symbol name for the following short stack (at offset 199):
dbgexProcessError()+193<-dbgeExecuteForError()+65<-dbgePostErrorKGE()+1726<-dbkePostKGE_kgsf()+75<-kgeade()+560<-kgerev()+125<-kgerec5()+60<-sss_xcpt_EvalFilterEx()+1869<-sss_xcpt_EvalFilter()+174<-.1.6_8+59<-00007FFE53401D86<-00007FFE534133FD<-00007FFE533D4847<-00007FFE5341258A<-lmebucp()+30<-kqlbebs()+1714<-kqlblfc()+222<-adbdrv()+44244<-opiexe()+20842<-opiosq0()+5129<-kpooprx()+357<-kpoal8()+940<-opiodr()+1662<-ttcpip()+1325<-opitsk()+2040<-opiino()+1258<-opiodr()+1662<-opidrv()+864<-sou2o()+98<-opimai_real()+158<-opimai()+191<-OracleThreadStart()+724<-00007FFE5157168D<-00007FFE533954E4
Errors in file d:\app\administrator\diag\rdbms\regent\regent\trace\regent_ora_2548.trc  (incident=3014333):
ORA-07445: ??????: ???? [lmebucp()+30] [ACCESS_VIOLATION] [ADDR:0x0] [PC:0xB476E1A] [UNABLE_TO_READ] []
Incident details in: d:\app\administrator\diag\rdbms\regent\regent\incident\incdir_3014333\regent_ora_2548_i3014333.trc
Trace dumping is performing id=[cdmp_20190110081922]
PMON (ospid: 2860): terminating the instance due to error 397
Thu Jan 10 08:19:28 2019
Instance terminated by PMON, pid = 2860

主要报错和Call Stack

Dump continued from file: d:\app\administrator\diag\rdbms\regent\regent\trace\regent_ora_2548.trc
ORA-07445: ??????: ???? [lmebucp()+30] [ACCESS_VIOLATION] [ADDR:0x0] [PC:0xB476E1A] [UNABLE_TO_READ] []
========= Dump for incident 3014333 (ORA 7445 [lmebucp()+30]) ========
----- Beginning of Customized Incident Dump(s) -----
Exception [type: ACCESS_VIOLATION, UNABLE_TO_READ] [ADDR:0x0] [PC:0xB476E1A, lmebucp()+30]
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
Process Id: 0x00001b54  Thread Id : 0x000009f4    Time : Thu Jan 10 08:19:20 
Excp. Code: 0xc0000005  Excp. Type: ACCESS_VIO    Flags: 0x00000000
------------------- Registers ----------------------------
ip=000000000B476E1A sp=000000003D913140 rp=0000000000000000
r1=0000000000000009 r2=0000000000000000 r3=0000000000003440 
r4=0000000000400000 r5=000000003D913140 r6=0000000000000000 r7=0000000011FA4760 
r8=0000000000000009 r9=000000003D9132A0 r10=0000000000000009 r11=0000000000000000 
r12=000000003D9132A0 r13=000000000F7B04F8 r14=0000000000020C78 r15=0000000000000002 
------------------- End of Registers ---------------------
*** 2019-01-10 08:19:20.819
dbkedDefDump(): Starting a non-incident diagnostic dump (flags=0x3, level=3, mask=0x0)
----- Current SQL Statement for this session (sql_id=a01hp0psv0rrh) -----
alter database open
----- Call Stack Trace -----
calling              call     entry                argument values in hex      
location             type     point                (? means dubious value)     
-------------------- -------- -------------------- ----------------------------
lmebucp()+30                  0000000000000000     009882700 00988270C 000000000
                                                   03D8F59A0
kqlbebs()+1714       CALL???  lmebucp()+25         000000002 000000002 03E0B0000
                                                   000000FA0
kqlblfc()+222        CALL???  kqlbebs()            1A51003FA0 000000000
                                                   000000000 011FA4760
adbdrv()+44244       CALL???  kqlblfc()            000000000 03D9190A8 000000000
                                                   000000000
opiexe()+20842       CALL???  adbdrv()             000000023 000000003
                                                   1A00000102 000000000
opiosq0()+5129       CALL???  opiexe()+16981       000000004 000000000 03D91A8C0
                                                   B20010001010354
kpooprx()+357        CALL???  opiosq0()            000000003 00000000E 03D91AB90
                                                   0000000A4
kpoal8()+940         CALL???  kpooprx()            03D91ACE0 000000001 000060000
                                                   000000001
opiodr()+1662        CALL???  kpoal8()             00000005E 00000001C 03D91E100
                                                   00ABAF224
ttcpip()+1325        CALL???  opiodr()             480000000000005E
                                                   49004D000000001C 03D91E100
                                                   4100200000000001
opitsk()+2040        CALL???  ttcpip()             011FBEA40 000000000 000000000
                                                   000000000
opiino()+1258        CALL???  opitsk()             00000001E 000000000 000000000
                                                   03D91F9F8
opiodr()+1662        CALL???  opiino()             00000003C 000000004 03D91FAB0
                                                   000000000
opidrv()+864         CALL???  opiodr()             00000003C 000000004 03D91FAB0
                                                   615C3A6400000000
sou2o()+98           CALL???  opidrv()+150         00000003C 000000004 03D91FAB0
                                                   000000000
opimai_real()+158    CALL???  sou2o()              05C368F82 000000000 000000000
                                                   03D91FBA4
opimai()+191         CALL???  opimai_real()        0001F0003 7FFE509282EE
                                                   000000000 00887C9B0
OracleThreadStart()  CALL???  opimai()             7FFE51571680 000000002
+724                                               0085DFE20 0000009F4
00007FFE5157168D     CALL???  OracleThreadStart()  012DBFF18 000000000 000000000
                                                   000000000
00007FFE533954E4     CALL???  00007FFE51571680     000000000 000000000 000000000
                                                   000000000
 
--------------------- Binary Stack Dump ---------------------

根据经验基本上可以判断是主机异常关机导致bootstrap$数据异常，从mount到open是无法读取bootstrap$，从而报错ORA-07445[lmebucp()+30]。

1、使用bbed将主库好的bootstrap$表块恢复

2、DBCA重建，恢复备份