今天早上例行对各个区域数据库服务器进行检查，发现内蒙古电信的数据库服务器出现ORA-600 [12235]错误
一、错误现象

alert_txzldb.log日志：
Sun Nov  6 09:34:57 2011
Errors in file /opt/oracle/admin/txzldb/bdump/txzldb_ora_8253.trc:
ORA-00600: internal error code, arguments: [12235], [], [], [], [], [], [], []
txzldb_ora_8253.trc内容：
Oracle program name: oracle@database.localdomain
*** 2011-11-06 09:34:57.530
ksedmp: internal or fatal error
ORA-00600: internal error code, arguments: [12235], [], [], [], [], [], [], []
Current SQL information unavailable - no session.
----- Call Stack Trace -----
calling              call     entry                argument values in hex
location             type     point                (? means dubious value)
-------------------- -------- -------------------- ----------------------------
ksedmp()+269         call     ksedst()+0           0 ? 0 ? 0 ? 0 ? 0 ? 0 ?
ksfdmp()+14          call     ksedmp()+0           3 ? BFFFECA0 ? 98584A4 ?
                                                   AD58F60 ? 3 ? A4B929C ?
kgeriv()+188         call     ksfdmp()+0           AD58F60 ? 3 ?
kgesiv()+113         call     kgeriv()+0           AD58F60 ? 0 ? 2FCB ? 0 ?
                                                   BFFFED0C ?
ksesic0()+39         call     kgesiv()+0           AD58F60 ? 0 ? 2FCB ? 0 ?
                                                   BFFFED0C ? 2FCB ? 0 ?
                                                   BFFFED0C ?
opirip()+519         call     ksesic0()+0          2FCB ? AD5903C ? BFFFF6AC ?
                                                   FFFFFFFF ? BFFFF814 ? 1 ?
opidrv()+462         call     opirip()+0           32 ? 0 ? 0 ?
sou2o()+25           call     opidrv()+0           32 ? 0 ? 0 ?
main()+355           call     sou2o()+0            BFFFF814 ? 32 ? 0 ? 0 ?
                                                   BFFFF840 ? 0 ?
__libc_start_main()  call     main()+0             1 ? BFFFF894 ? BFFFF89C ?
+161                                               96DFD4 ? 1 ? 8208E40 ?
--------------------- Binary Stack Dump ---------------------
========== FRAME [1] (ksedmp()+269 -> ksedst()+0) ==========
Dump of memory from 0xBFFFEB64 to 0xBFFFEC64
BFFFEB60          BFFFEC64 0820B6F8 00000000      [d..... .....]
BFFFEB70 00000000 00000000 00000000 00000000  [................]
        Repeat 2 times
………………

二、数据库版本

SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle9i Enterprise Edition Release 9.2.0.4.0 - Production
PL/SQL Release 9.2.0.4.0 - Production
CORE    9.2.0.3.0       Production
TNS for Linux: Version 9.2.0.4.0 - Production
NLSRTL Version 9.2.0.4.0 - Production

三、mos信息
根据mos的建议，这个错误可以忽略，不用过多关注

ORA-600 [12235] "Oracle process has no purpose in life !" [ID 33174.1]
ERROR:
  ORA-600 [12235] [a] [b] [/c] [d] [e]
VERSIONS:
  versions 7.0 to 9.2
DESCRIPTION:
  This error shows up when Oracle detects an Oracle defunct process.
  When an Oracle process starts up, it reads data from the SGA that defines
  what type of process it should become.
  If the process does not locate any valid customization data, it reports
  ORA-600 [12235] and exits.
  On a heavily loaded system, ORA-600 [12235] may be a symptom that the server
  process was too slow in starting. That is, the process that initiated the
  new server may timeout waiting for the new process to start and abandon the
  new server request.  In the new server process it is possible that the new
  server reaches the code to customize its operation before the os request to
  kill the process is actioned.  The messages "ksbsrv: No startup
  acknowledgement from forked process ..." and "Timed out trying to start
  shared server ..." may be reported to trace and alert files.
SUGGESTIONS:
  Ignore the error.
  One of the most common reasons for this error to be reported is that
  someone typed 'oracle' manually at the OS prompt.
  If this error is reported regularly and appears not to be explained
  by comments made in this note, contact Oracle Support Services.

四、错误重现
根据mos中的讲述，在系统级别执行oracle，也会出现该错误提示，使用oracle重现结果

[oracle@database ~]$ oracle
[oracle@database ~]$ oracle
[oracle@database ~]$ tail  $ORACLE_BASE/admin/$ORACLE_SID/bdump/alert_$ORACLE_SID.log
Mon Nov  7 11:10:25 2011
Errors in file /opt/oracle/admin/txzldb/bdump/txzldb_ora_27108.trc:
ORA-00600: internal error code, arguments: [12235], [], [], [], [], [], [], []
Mon Nov  7 11:10:27 2011
Errors in file /opt/oracle/admin/txzldb/bdump/txzldb_ora_1281.trc:
ORA-00600: internal error code, arguments: [12235], [], [], [], [], [], [], []