oracle expdp作業外表報錯ORA-20011&KUP-11024&ORA-29913

     2018年1月份第一次巡檢中，某地市oracle資料庫告警ORA-20011&KUP-11024&ORA-29913，

相關處理如下：

作業系統版本：rhel 2.6.39-400.17.1.el6uek.x86_64 

作業系統核心：rhel 2.6.39-400.17.1.el6uek.x86_64

資料庫版本：oracle 11.2.0.4

問題描述：資料庫對資料泵作業殘餘外部表收集統計資訊報錯：ORA-20011&KUP-11024&ORA-29913 

告警日志報錯資訊如下： 

09/01/2018 22:00:10 DBMS_STATS: GATHER_STATS_JOB encountered errors. Check the trace file. 

ORA-20011: Approximate NDV failed: ORA-29913: error in executing ODCIEXTTABLEOPEN callout 

Tue Jan 09 22:00:10 2018 

KUP-11024: This external table can only be accessed from within a Data Pump job. 

Errors in file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_j003_333.trc 

檢視告警日志提示的trc跟蹤檔案orcl_j003_333.trc 

Trace file /u01/app/oracle/diag/rdbms/orcl/orcl/trace/orcl_j003_333.trc 

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production 

With the Partitioning, OLAP, Data Mining and Real Application Testing options 

ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1 

System name: Linux 

Node name: cis.db 

Release: 2.6.39-400.17.1.el6uek.x86_64 

Version: #1 SMP Fri Feb 22 18:16:18 PST 2013 

Machine: x86_64 

Instance name: orcl 

Redo thread mounted by this instance: 1 

Oracle process number: 57 

Unix process pid: 333, image: [email protected] (J003) 

*** 2018-01-09 22:00:10.612 

*** SESSION ID:(634.22947) 2018-01-09 22:00:10.612 

*** CLIENT ID:() 2018-01-09 22:00:10.612 

*** SERVICE NAME:(SYS$USERS) 2018-01-09 22:00:10.612 

*** MODULE NAME:(DBMS_SCHEDULER) 2018-01-09 22:00:10.612 

*** ACTION NAME:(ORA$AT_OS_OPT_SY_152) 2018-01-09 22:00:10.612 

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. 

*** 2018-01-09 22:00:10.612 

DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"EXPDP"','"ET$01B7017F0001"','""', ...) 

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. 

*** 2018-01-09 22:00:10.656 

DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"EXPDP"','"ET$01C303530001"','""', ...) 

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. 

*** 2018-01-09 22:00:10.686 

DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"EXPDP"','"ET$01982C090001"','""', ...) 

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. 

*** 2018-01-09 22:00:10.711 

DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"EXPDP"','"ET$01D400370001"','""', ...) 

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. 

*** 2018-01-09 22:00:10.735 

DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"EXPDP"','"ET$01D3186F0001"','""', ...) 

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. 

*** 2018-01-09 22:00:10.759 

DBMS_STATS: GATHER_STATS_JOB: GATHER_TABLE_STATS('"EXPDP"','"ET$00251AEF0001"','""', ...) 

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. 

處理方法： 

1、DBMS_STATS job 運作時，沒有DataPump job運作 

SQL> !ps -ef|grep expdp 

oracle 28440 28067 0 09:49 pts/0 00:00:00 /bin/bash -c ps -ef|grep expdp 

oracle 28442 28440 0 09:49 pts/0 00:00:00 grep expdp 

2、确定外部表屬于datapump job 

set linesize 200 trimspool on  

set pagesize 2000  

col owner form a30  

col created form a25  

col last_ddl_time form a25  

col object_name form a30  

col object_type form a25  

SQL> 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$%';  

OWNER OBJECT_NAME OBJECT_TYPE STATUS CREATED LAST_DDL_TIME  

------------------------------ ------------------------------ ------------------------- ------- ------------------------- -------------------------  

EXPDP ET$01D400370001 TABLE VALID 09-oct-2015 23:11:41 09-oct-2015 23:11:41  

EXPDP ET$01D3186F0001 TABLE VALID 18-dec-2015 02:20:04 18-dec-2015 02:20:04  

EXPDP ET$01C303530001 TABLE VALID 15-mar-2015 00:45:46 15-mar-2015 00:45:46  

EXPDP ET$01B7017F0001 TABLE VALID 15-mar-2015 00:42:03 15-mar-2015 00:42:03  

EXPDP ET$01982C090001 TABLE VALID 08-oct-2015 23:51:06 08-oct-2015 23:51:06  

EXPDP ET$00251AEF0001 TABLE VALID 29-dec-2015 00:50:20 29-dec-2015 00:50:20  

6 rows selected.  

SQL> select owner, TABLE_NAME, DEFAULT_DIRECTORY_NAME, ACCESS_TYPE  

from dba_external_tables  

order by 1,2;  

OWNER TABLE_NAME DEFAULT_DIRECTORY_NAME ACCESS_  

------------------------------ ------------------------------ ------------------------------ -------  

EXPDP ET$00251AEF0001 EXPDATA CLOB  

EXPDP ET$01982C090001 EXPDATA CLOB  

EXPDP ET$01B7017F0001 EXPDATA CLOB  

EXPDP ET$01C303530001 EXPDATA CLOB  

EXPDP ET$01D3186F0001 EXPDATA CLOB  

EXPDP ET$01D400370001 EXPDATA CLOB  

SYS ALERT_LOG_VIEW BDUMP CLOB  

--查詢外部表，報的錯誤和alert日志一樣  

SQL> select count(*) from EXPDP.ET$00251AEF0001;  

select count(*) from EXPDP.ET$00251AEF0001  

*  

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.  

SQL>  

--檢視外部表定義  

SQL> desc ET$00251AEF0001  

ERROR:  

ORA-04043: object ET$00251AEF0001 does not exist  

3、清理DataPump jobs。 

SQL> select 'drop table '||owner||'.'||object_name||' purge ;' from dba_objects where object_name like 'ET$%'; 

'DROPTABLE'||OWNER||'.'||OBJECT_NAME||'PURGE;' 

---------------------------------------------------- 

drop table EXPDP.ET$01D400370001 purge ; 

drop table EXPDP.ET$01D3186F0001 purge ; 

drop table EXPDP.ET$01C303530001 purge ; 

drop table EXPDP.ET$01B7017F0001 purge ; 

drop table EXPDP.ET$01982C090001 purge ; 

drop table EXPDP.ET$00251AEF0001 purge ; 

6 rows selected. 

SQL> drop table EXPDP.ET$01D400370001 purge ; 

drop table EXPDP.ET$01D3186F0001 purge ; 

drop table EXPDP.ET$01C303530001 purge ; 

drop table EXPDP.ET$01B7017F0001 purge ; 

drop table EXPDP.ET$01982C090001 purge ; 

drop table EXPDP.ET$00251AEF0001 purge ; 

Table dropped. 

SQL> 

Table dropped. 

SQL> 

Table dropped. 

SQL> 

Table dropped. 

SQL> 

Table dropped. 

SQL> 

Table dropped.

      由以上資訊可知，資料泵的外部表産生的時間分别是2015年3月份和10月份，經溝通得知該地市資料庫服務

器發生過重裝和機房搬遷：

猜測：可能當時資料庫重裝和機房搬遷，資料庫使用過資料泵備份而資料泵作業沒有成功退出，導緻資料泵

作業外部表殘留，影響到資料庫統計資訊收集，處理方法就是删除資料泵作業殘留外部表。個人覺得比較奇

怪的是資料泵作業外部表實體已經不存在，DDL定義已經不存在，但是外部表明卻存在，應該是資料庫字典

資訊錯誤。