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HomeDatabaseMysql TutorialOracle 10.2.0.4上ORA-01882故障解决一例

时区TimeZone在Oracle中不仅仅是一个环境变量,而且是融入到数据取值保存过程中的。Oracle字段类型中,与时区有关的字段类型只有

任何软件,特别是企业级系统组件的升级工作,是一个非常复杂的过程。升级路径、数据留存预案、回退步骤、原有业务功能冲击程度,都是需要反复测试论证的问题。所有的运维人员在遇到升级问题的时候,都要抱有谨慎的态度。
 
笔者最近接手一个升级过的系统,在测试过程中遇到了一些问题。经过查找MOS和网络资源加以解决。记录下来,留待需要的朋友。

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 1、环境介绍

 

接手的是一个升级到10.2.0.4的Linux版。

 

SQL> select * from v$version;

BANNER

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

Oracle Database 10g Release 10.2.0.4.0 - 64bit Production

PL/SQL Release 10.2.0.4.0 - Production

CORE 10.2.0.4.0 Production

TNS for Linux: Version 10.2.0.4.0 - Production

NLSRTL Version 10.2.0.4.0 - Production

 

2、故障问题展示

 

在巡检中,发现记录Oracle内部作业调度的视图dba_scheduler_jobs不能支持查询。

 

SQL> select * from dba_scheduler_jobs;

 

select * from dba_scheduler_jobs

ORA-01882: 未找到时区

 

1882错误的官方解释信息如下:

 

[oracle@allfirst ~]$ oerr ora 1882

01882, 00000, "timezone region %s not found"

// *Cause: The specified region name was not found.

// *Action: Please contact Oracle Customer Support.

 

但是,并不是所有的字段都不支持查询动作。

 

SQL> select owner, job_name from dba_scheduler_jobs;

 

OWNER                          JOB_NAME

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

SYS                            SQLSCRIPT_4084880

SYS                            AUTO_SPACE_ADVISOR_JOB

SYS                            GATHER_STATS_JOB

SYS                            FGR$AUTOPURGE_JOB

SYS                            PURGE_LOG

EXFSYS                        RLM$SCHDNEGACTION

EXFSYS                        RLM$EVTCLEANUP

ORACLE_OCM                    MGMT_STATS_CONFIG_JOB

ORACLE_OCM                    MGMT_CONFIG_JOB

 

9 rows selected

 

从字段性质看,值得怀疑与时区有关的字段是Time Zone。

 

SQL> select column_name, data_type from dba_tab_columns where owner='SYS' and table_name=upper('dba_scheduler_jobs') and data_type like '%TIME ZONE%';
 
 

COLUMN_NAME                    DATA_TYPE

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

START_DATE                    TIMESTAMP(6) WITH TIME ZONE

END_DATE                      TIMESTAMP(6) WITH TIME ZONE

LAST_START_DATE                TIMESTAMP(6) WITH TIME ZONE

NEXT_RUN_DATE                  TIMESTAMP(6) WITH TIME ZONE

 

但是,,也并不是所有的time zone类型字段都不能显示。而且这样的问题不止出现在这个视图中。

 

 

SQL> select start_date from dba_scheduler_jobs;

START_DATE

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

19-3月 -12 05.48.23.742796 下午 +08:00

28-1月 -14 02.42.49.000000 下午 +08:00

13-5月 -13 07.40.35.640706 下午 +08:00

13-5月 -13 07.32.40.314879 下午 +08:00

 

9 rows selected

 

SQL> select * from SYS.scheduler$_job ;

select * from SYS.scheduler$_job

 

ORA-01882: 未找到时区

3、问题分析

从直观看,应该是数据库部分数据表中与timezone有关的数值出现问题造成的。

时区TimeZone在Oracle中不仅仅是一个环境变量,而且是融入到数据取值保存过程中的。Oracle字段类型中,与时区有关的字段类型只有两个:timestamp with time zone和timestamp with local time zone。
 
Oracle的时区是通过时区文件来进行控制的,不同版本的数据库,选择不同版本的时区文件。

 

SQL> select * from v$timezone_file;

FILENAME        VERSION

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

timezlrg.dat          4

 

一个经常发生的故障,是升级数据库过程中,没有升级time zone文件。这样导致升级失败现象。Time Zone文件是归属在DST技术体系下。10.2.0.2使用的是DST版本为DSTv2、10.2.0.3使用DSTv3、10.2.0.4使用DSTv4。从我们刚才的测试来看,使用的DST版本是正确的。
 
时区问题的另一个特点是服务器、客户端特性差异。如果需要确定是否是服务器问题,需要直接到服务器上执行命令。

 

[oracle@allfirst /]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.4.0 - Production on 星期二 1月 28 14:54:51 2014

Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.

 

SQL> conn / as sysdba

已连接。

SQL> select * from dba_scheduler_jobs;

ERROR:

ORA-01882: 未找到时区区域 %s

 

说明是数据库服务器端问题。如果是客户端问题,则需要及时升级客户端版本。

一种猜想是:当Oracle进行版本升级的时候,使用数据库时区文件的确是升级了,但是对应的内部数据还没有进行更新。这样就存在不兼容的问题。

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