转载

【故障处理】ORA-12545: Connect failed because target host

【故障处理】ORA-12545: Connect failed because target host or object does not exist

1 BLOG文档结构图

2 前言部分

2.1 导读和注意事项

各位技术爱好者，看完本文后，你可以掌握如下的技能，也可以学到一些其它你所不知道的知识，~O(∩_∩)O~：

① 错误ORA-12545: Connect failed because target host or object does not exist的一种问题解决

Tips：

① 本文在ITpub（http://blog.itpub.net/26736162）、博客园(http://www.cnblogs.com/lhrbest)和微信公众号（xiaomaimiaolhr）有同步更新

② 文章中用到的所有代码，相关软件，相关资料请前往小麦苗的云盘下载（http://blog.itpub.net/26736162/viewspace-1624453/）

③ 若文章代码格式有错乱，推荐使用搜狗、360或QQ浏览器，也可以下载pdf格式的文档来查看，pdf文档下载地址：http://blog.itpub.net/26736162/viewspace-1624453/，另外itpub格式显示有问题，可以去博客园地址阅读

④ 本篇BLOG中命令的输出部分需要特别关注的地方我都用灰色背景和粉红色字体来表示，比如下边的例子中，thread 1的最大归档日志号为33，thread 2的最大归档日志号为43是需要特别关注的地方；而命令一般使用黄色背景和红色字体标注；对代码或代码输出部分的注释一般采用蓝色字体表示。

List of Archived Logs in backup set 11

Thrd Seq Low SCN Low Time Next SCN Next Time

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

1 32 1621589 2015-05-29 11:09:52 1625242 2015-05-29 11:15:48

1 33 1625242 2015-05-29 11:15:48 1625293 2015-05-29 11:15:58

2 42 1613951 2015-05-29 10:41:18 1625245 2015-05-29 11:15:49

2 43 1625245 2015-05-29 11:15:49 1625253 2015-05-29 11:15:53

[ZHLHRDB1:root]:/>lsvg -o

T_XDESK_APP1_vg

rootvg

[ZHLHRDB1:root]:/>

00:27:22 SQL> alter tablespace idxtbs read write;

====》2097152*512/1024/1024/1024=1G

本文如有错误或不完善的地方请大家多多指正，ITPUB留言或QQ皆可，您的批评指正是我写作的最大动力。

3 故障分析及解决过程

3.1 故障环境介绍

项目	source db
db 类型	RAC
db version	11.2.0.3
db 存储	ASM
OS版本及kernel版本	AIX 64位 6.1.0.0

3.2 故障发生现象及报错信息

同事过来找我说数据库不能连接，如下情况：

cssp@ZFZHLHRDB1:/cssp$ sqlplus tacc/tacc

SQL*Plus: Release 11.2.0.3.0 Production on Fri Aug 12 16:35:42 2016

ERROR:

ORA-12545: Connect failed because target host or object does not exist

Enter user-name:

ERROR:

ORA-12545: Connect failed because target host or object does not exist

注意：以上的连接方式采用了TWO_TASK这个环境变量，在Unix和Linux环境下，可以设置TWO_TASK环境变量，当用户连接数据库且没有指定服务名时，会自动利用TWO_TASK的设置作为环境变量连接数据库。有关这个环境变量的更多内容可以参考：http://blog.itpub.net/26736162/viewspace-2112274/ 和 http://blog.itpub.net/26736162/viewspace-2112277/

3.3 故障分析及解决过程

我采用了tnsping、用tnsnames连接和检查3大网络配置文件，都没有问题，如下：

cssp@ZFZHLHRDB1:/cssp$ tnsping oratacc1

TNS Ping Utility for IBM/AIX RISC System/6000: Version 11.2.0.3.0 - Production on 12-AUG-2016 16:36:14

Used parameter files:

/oracle/app/oracle/product/11.2.0/db/network/admin/sqlnet.ora

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = ZFtaccDB-scan)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = 22.188.173.15)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = 22.188.173.16)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = oratacc1)))

OK (80 msec)

cssp@ZFZHLHRDB1:/cssp$ sqlplus tacc/tacc@oratacc1

SQL*Plus: Release 11.2.0.3.0 Production on Fri Aug 12 16:36:25 2016

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,

Data Mining and Real Application Testing options

SQL> exit

cssp@ZFZHLHRDB1:/cssp$ oerr ora 12545

12545, 00000, "Connect failed because target host or object does not exist"

// *Cause: The address specified is not valid, or the program being

// connected to does not exist.

// *Action: Ensure the ADDRESS parameters have been entered correctly; the

// most likely incorrect parameter is the node name. Ensure that the

// executable for the server exists (perhaps "oracle" is missing.)

// If the protocol is TCP/IP, edit the TNSNAMES.ORA file to change the

// host name to a numeric IP address and try again.

查看环境变量的设置：

cssp@ZFZHLHRDB1:/cssp$ more .profile

#For CICS

export CICS=/usr/lpp/cics

#export LANG=zh_CN.UTF-8

export LANG=en_US

#For ORACLE

ORACLE_BASE=/oracle/app/oracle

ORACLE_HOME=/oracle/app/oracle/product/11.2.0/db

TWO_TASK=oratacc1

ORACLE_SID=oratacc1

ORACLE_TERM=vt100

ORACLE_OWNER=oracle

export ORACLE_BASE ORACLE_HOME ORACLE_SID ORACLE_TERM ORACLE_OWNER

LD_LIBRARY_PATH=/oracle/app/oracle/product/11.2.0/db/lib:/oracle/app/oracle/product/11.2.0/db/lib32

#LD_LIBRARY_PATH=/oracle/app/oracle/product/11.2.0/db/lib32

#export LIBPATH=$LIBPATH:/oracle/app/oracle/product/11.2.0/db/lib

NLS_LANG=American_America.ZHS16GBK

ORA_NLS33=/oracle/app/oracle/product/11.2.0/db/nls/data

export PATH=/usr/java5/bin:/cssp/jscs

export PATH=$PATH:/oracle/app/oracle/product/11.2.0/db/OPatch:/oracle/app/oracle/product/11.2.0/db/bin:/bin:/usr/ccs/bin:/usr/bin/X11:/sharebkup/data/peij

OPATCH_PLATFORM_ID=212

export LD_LIBRARY_PATH NLS_LANG ORA_NLS33 PATH TMP TMPDIR OPATCH_PLATFORM_ID

export AIXTHREAD_SCOPE=S

umask 022

export DBCA_RAW_CONFIG=/oracle/dbname_raw.conf

export PS1='LOGNAME@′‘hostname‘:′LOGNAME@′‘hostname‘:′PWD''$ '

export ORA_NL10=$ORACLE_HOME/nls/data

set -o vi

export EDITOR=vi

export NLS_LANG=AMERICAN_AMERICA.ZHS16GBK

export NLS_DATE_FORMAT=YYYY-MM-DD

export PATH=$PATH:/usr/vac/bin:/var/ifor:/usr/opt/ifor/ls/conf:/usr/lib/cobol/bin:/usr/lpp/cics/bin:/usr/lpp/cics/etc:/usr/lpp/dce/bin:/usr/lpp/mqm/bin:/usr/lpp/mqm/sa

mp/bin:/usr/mqm/samp/bin:HOME/bin:HOME/bin:ORACLE_HOME/bin:/csspd05u/test/bin:.:/usr/mqm/samp/bin

export LIBPATH=/usr/mqm/lib:ORACLEHOME/lib32:ORACLEHOME/lib32:COBDIR/coblib:/usr/lib:/lib:/usr/lpp/cics/lib:/usr/lpp/encina/lib:/usr/lpp/dce/lib:.

export NLSPATH=/usr/lib/nls/msg/%L/%N:/usr/lpp/cics/msg/%L/%N:/usr/lpp/nls/msg/en_US/%N:/usr/lpp/encina/msg/%L/%N:/usr/lpp/dce/lib/nls/msg/%L/%N

#For cssp

export JAVA_HOME=/usr/java5_64