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使用ErrorStack进行错误跟踪及诊断

在使用

数据库的过程中，可能会遇到各种各样的错误或异常，很多异常的提示并不具体，我们有必要了解一下的跟踪方式。

是提供的一种对于错误堆栈进行跟踪的方法，通过设置跟踪可以将一些错误的后台信息详尽地转储出来，写入跟踪文件，对于错误的研究与诊断非常有效。

ErrorStack40 1 2 Level1 + ProcessState

（显示所有，着重显示当前）

可以在实例级或会话级别设置，也可以在参数文件中设置，这个设置仅当某个特定的错误出现时才被触发，如设置事件的跟踪：

一个客户曾经出现如下错误，提示数据的精度超过允许值，是后台调度的任务：

Errors in file /admin/erpdb/bdump/erpdb1_j000_447020.trc:
ORA-01438: value larger than specified precision allowed for this column
ORA-06512: at line 1

SQLErrorStackSQLalter system set events='1438 trace name errorstack forever,level 3';

alter system set events='1438 trace name errorstack off';

Oracle 10gMon Jul 13 10:48:392009
Mon Jul 13 10:56:06 2009
ORA-01438: value larger than specified precision allowed for this column
Trace dumping is performing id=[cdmp_20090713105608]
OS Pid: 541528 executed alter system set events '1438 trace name Errorstackoff'

SQLSQLSQLNumber***SESSION ID:(857.16304) 2009-07-13 10:56:06.429
ksedmp: internal or fatal error
Current SQL statement for this session:
----- PL/SQL Call Stack -----
handle number name
700000336a1a070 236 procedure ERP.PROC_AUTOBATPROC
700000342eb7c20 1 anonymous block

可以很容易地测试这一功能的使用，比如使用如下代码中的测试过程：

SQL> connect eygle/eygle
Table created.
insert into t values(a,1)
ERROR at line 1:
SQL> alter system set events '984 trace name errorstack off';

Mon Jul 13 22:55:592009
Mon Jul 13 22:59:12 2009
ORA-00984: column not allowed here
OS Pid: 2431 executed alter system set events '984 trace name errorstack off'

insert*** 2009-07-13 22:59:12.928
ORA-00984: column not allowed here
insert into t values(a,1)
calling call entry argument values in hex
-------------------- -------- -------------------- ----------------------------

---

---

以下引用在ITPUB上的一个讨论，是使用ErrorStack跟踪解决问题的典型案例（原文链接指向ITPUB）

Import: Release 10.2.0.1.0 - Production on Tue Mar 18 14:19:49 2008

Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

Export file created by EXPORT:V10.02.01 via conventional path

. importing DBA_MGR's objects into DBA_MGR

IMP-00058: ORACLE error 1438 encountered

IMP-00028: partial import of previous table rolled back: 20501 rows rolled back

System altered

然后重新执行IMP；

2、查看UDUMP下日志,如下:

/opt/oracle/admin/orcl/udump/orcl_ora_32355.trc

With the Partitioning, OLAP and Data Mining options

System name:Linux

Release:2.6.9-22.ELsmp

Machine:x86_64

Redo thread mounted by this instance: 1

Unix process pid: 32355, image: oracle@zhx25.cccc.com (TNS V1-V3)

*** SESSION ID135.949) 2008-03-18 17:11:02.014

ksedmp: internal or fatal error

Current SQL statement for this session:

("PRTNO", "SEQNO", "SEQDESC", "PRTEFLAG", "SEQCC", "SEQNXTNO", "SEQDEPT", "WKCCODE", "WKCALTCODE", "SEQSETHR", "LAB_SEQSETHR", "SEQRUNHR", "LAB_SEQRUNHR", "SEQQUEHR", "LAB_SEQQUEHR", "SEQTRANHR", "LAB_SEQTRANHR", "SEQNOQLTRAT", "SEQCHGDAT", "SEQCHGRSN", "SEQCHGCTLR", "MACHCODE", "MACHALTCODE", "RESCODE", "KEYSEQ", "SEQCRYLOT", "INITOVERRATE", "COMWORK", "SEQLOTFLAG", "SEQEFDAT", "SEQIEFDAT", "SEQEFLOTNO", "SEQIEFLOTNO", "SEQECONO", "PRTSEQCST", "SEQSELFCST", "INVYORN", "SEQQTY", "SEQNOTE", "NOPRTAVELZ", "OUTSEQFLAG", "WXCST", "SEQGSCHGCTLR", "SEQGSCHGDAT", "SEQSHCTL", "SEQSHDAT", "SEQSHSIGN", "PRICE", "ACCNO", "ROUSTAT", "FIXMFLAG", "BANCL"  (:1, :2, :3, :4, :5, :6, :7, :8, :9, :10, :11, :12, :13, :14, :15, :16, :17, :18, :19, :20, :21, :22, :23, :24, :25, :26, :27, :28, :29, :30, :31, :32, :33, :34, :35, :36, :37, :38, :39, :40, :41, :42, :43, :44, :45, :46, :47, :48, :49, :50, :51, :52)

calling

entry

location

point

…………

Offsi = 48, Offsi = 1440

Bind Twotask Scalar Sql In (may be out) Copy 

Offsi = 48, Offsi = 1472

Bind Twotask Scalar Sql In (may be out) Copy 

Offsi = 48, Offsi = 1504

Bind Twotask Scalar Sql In (may be out) Copy 

Offsi = 48, Offsi = 1536

Bind Twotask Scalar Sql In (may be out) Copy 

Offsi = 48, Offsi = 1568

Bind Twotask Scalar Sql In (may be out) Copy 

Offsi = 48, Offsi = 1600

Bind Twotask Scalar Sql In (may be out) Copy 

Offsi = 48, Offsi = 1632

Bind#0

oacflg=03 fl2=1000010 frm=01 csi=852 siz=3344 off=0

bln=32

flg=05

value="?

oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00

kxsbbbfp=2a974dc3b8

value=###

Dump of memory from 0x0000002A974CDE88 to 0x0000002A974CDE9E

2A974CDE90 C9BBC6C8 52024D01 30310248 00003304[.....M.RH.10.3..]

oacdty=01 mxl=32(30) mxlc=00 mal=00 scl=00 pre=00

kxsbbbfp=2a974dc3d0

avl=00

Bind#3

oacflg=03 fl2=1000010 frm=01 csi=852 siz=0 off=88

bln=32

flg=01

…………

从跟踪文件可以看到，问题是系统认为地址为2A974CDE88的数值非法，在导入会提示ORA-1438错误。。

3、找到DMP中相关数据

用winhex打开dmp文件，搜索十六进制串“2E313133 02C10604 C8C6BBC9 014D0252 48023130 0433F3FF”（对trace文件中的值要进行顺序调整）

5、对数据库相关数据项的类型进行调整

把数据项的类型由number(*)改为number(38)；

6、重新进行数据导入

[oracle@zhx25 ~]$ imp system/ceshi fromuser=dba_mgr touser=dba_mgr tables=t_routdef ignore=y file=1.dmp

Copyright (c) 1982, 2005, Oracle.Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production

Export file created by EXPORT:V10.02.01 via conventional path

. importing DBA_MGR's objects into DBA_MGR

"T_ROUTDEF"

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