数据库alert日志出现ORA-20011 KUP-11024等错误

Thu Sep 22 18:00:31 2016
DBMS_STATS: GATHER_STATS_JOB encountered errors.  Check the trace file.
Errors in file /u1/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_j002_2686.trc:
ORA-20011: Approximate NDV failed: ORA-29913: error in executing ODCIEXTTABLEOPEN callout
KUP-11024: This external table can only be accessed from within a Data Pump job.

从报错的信息看应该是数据库收集统计信息报错(GATHER_STATS_JOB)，但是报错原因是由于访问外部表导致,而该外部表很可能和data pump有关系.

查看trace日志

[oracle@xifenfei]$ more /u1/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_j002_2686.trc
Trace file /u1/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_j002_2686.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /u1/oracle/pruduct/11.2.0.3
System name:    Linux
Node name:      xifenfei
Release:        2.6.32-220.el6.x86_64
Version:        #1 SMP Wed Nov 9 08:03:13 EST 2011
Machine:        x86_64
Instance name: xifenfei
Redo thread mounted by this instance: 1
Oracle process number: 356
Unix process pid: 2686, image: oracle@xifenfei (J002)


*** 2016-09-22 18:00:31.939
*** SESSION ID:(835.16363) 2016-09-22 18:00:31.939
*** CLIENT ID:() 2016-09-22 18:00:31.939
*** SERVICE NAME:(SYS$USERS) 2016-09-22 18:00:31.939
*** MODULE NAME:(DBMS_SCHEDULER) 2016-09-22 18:00:31.939
*** ACTION NAME:(ORA$AT_OS_OPT_SY_10669) 2016-09-22 18:00:31.939
 
ORA-20011: Approximate NDV failed: ORA-29913: error in executing ODCIEXTTABLEOPEN callout
KUP-11024: This external table can only be accessed from within a Data Pump job.

*** 2016-09-22 18:00:31.939
DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"DWDBA"','"ET$012D00070001"','""', ...)
DBMS_STATS: ORA-20011: Approximate NDV failed: ORA-29913: error in executing ODCIEXTTABLEOPEN callout
KUP-11024: This external table can only be accessed from within a Data Pump job.

*** 2016-09-22 18:00:31.960
DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"DWDBA"','"ET$01D10D4F0001"','""', ...)
DBMS_STATS: ORA-20011: Approximate NDV failed: ORA-29913: error in executing ODCIEXTTABLEOPEN callout
KUP-11024: This external table can only be accessed from within a Data Pump job.

通过trace文件,我们已经可以明确是由于数据库对DWDBA.ET$012D00070001和DWDBA.ET$01D10D4F0001这两个表收集统计信息时候报的上述alert日志中看到的错误.

查询数据库记录

SYS@xifenfei>select OWNER,OBJECT_NAME,OBJECT_TYPE, status,
  2  to_char(CREATED,'dd-mon-yyyy hh24:mi:ss') created
  3  ,to_char(LAST_DDL_TIME , 'dd-mon-yyyy hh24:mi:ss') last_ddl_time
  4  from dba_objects
  5  where object_name like 'ET$%'
  6  /

OWNER     OBJECT_NAME      OBJECT_TYPE  STATUS  CREATED               LAST_DDL_TIME
--------- ---------------- ------------ ------- ------------------------- ----------------
DWDBA     ET$012D00070001  TABLE        VALID   10-mar-2016 16:32:25  10-mar-2016 16:32:25
DWDBA     ET$01D10D4F0001  TABLE        VALID   10-mar-2016 17:29:29  10-mar-2016 17:29:29

SYS@xifenfei> select owner, TABLE_NAME, DEFAULT_DIRECTORY_NAME, ACCESS_TYPE
  2  from dba_external_tables
  3  order by 1,2
  4  /

OWNER       TABLE_NAME                     DEFAULT_DIRECTORY_NAME         ACCESS_
----------- ------------------------------ ------------------------------ -------
DWDBA       ET$012D00070001                EXP_FILE_DIR                   CLOB
DWDBA       ET$01D10D4F0001                EXP_FILE_DIR                   CLOB

到这一步,我们已经完全清楚,ET$012D00070001和ET$01D10D4F0001是两个外部表,由于他们的存在使得收集统计信息异常。

分析ET$012D00070001表

SYS@xifenfei>desc DWDBA.ET$012D00070001
 Name                                                  Null?    Type
 ----------------------------------------------------- -------- ------------------------------------
 STORE_NO                                                       NUMBER(3)
 ITEM_NO                                                        NUMBER(6)
 WORK_DATE                                                      DATE
 DIVISION_NO                                                    NUMBER(2)
 SECTION_NO                                                     NUMBER(3)
 SUP_NO                                                         NUMBER(6)
 GRP_NO                                                         NUMBER(3)
 SUBGRP_NO                                                      NUMBER(3)
 USR                                                            VARCHAR2(30)
 TYPE                                                           NUMBER(1)
 ACTIVE_SELL_PRICE                                              NUMBER(8,2)
 SELL_PRICE                                                     NUMBER(8,2)
 SELL_VAT                                                       NUMBER(1)
 BUY_PRICE                                                      NUMBER(10,4)
 BUY_VAT                                                        NUMBER(1)
 PROMOTION_NO                                                   NUMBER(10)
 PROM_CLASS                                                     VARCHAR2(1)
 PROM_LEVEL                                                     NUMBER(1)
 STOCK                                                          NUMBER(10,3)
 STOCK_ADJ                                                      NUMBER(10,3)
 RECPT                                                          NUMBER(10,3)
 SALES                                                          NUMBER(10,3)
 STOCK_ADJ_AMNT                                                 NUMBER(10,2)
 RECPT_AMNT                                                     NUMBER(10,2)
 SALES_AMNT                                                     NUMBER(10,2)
 PROF_AMNT                                                      NUMBER(10,2)
 COST_CHANGE                                                    NUMBER(10,2)
 DISC                                                           NUMBER(10,3)
 RTN_QTY                                                        NUMBER(9,3)
 DISC_AMNT                                                      NUMBER(10,2)
 RTN_AMNT                                                       NUMBER(10,2)
 LOSS_AMNT                                                      NUMBER(10,2)
 CREATED_DATE                                                   DATE
 COST                                                           NUMBER(10,4)
 NBR_PK                                                         NUMBER(5)
 NBR_VISIT                                                      NUMBER(5)
 NBR_PK_LINE                                                    NUMBER(5)
 N_N_PROF_AMNT                                                  NUMBER(9,2)
 CON_FORE                                                       NUMBER(10,2)
 CON_FORE_OTH                                                   NUMBER(10,2)
 SALES_B                                                        NUMBER(10,3)
 SALES_AMNT_B                                                   NUMBER(10,2)

SYS@xifenfei>select count(*) from DWDBA.ET$012D00070001;
select count(*) from DWDBA.ET$012D00070001
*
ERROR at line 1:
ORA-29913: error in executing ODCIEXTTABLEOPEN callout
KUP-11024: This external table can only be accessed from within a Data Pump job.

通过对ET$012D00070001表查询重新了alert日志一样的错误,可以明确定位问题就是由于该外部表异常导致.通过查询mos,确定Bug 10327346 DBMS_WORKLOAD_CAPTURE does not drop external tables (causing ORA-20011 from DBMS_STATS)可能导致DBMS_WORKLOAD_CAPTURE无法正常清理掉Data pump的外部表导致出现Datapump出现孤立的外部表对象,从而出现该问题.解决方案就是直接drop 相关外部表.也就是这里的(ET$012D00070001和ET$01D10D4F0001)