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【故障处理】ORA-12162: TNS:net service name is incorrectly specified
今天拿到一个新的环境，可是执行sqlplus / as sysdba的时候不能登录，报ORA-12162: TNS:net service name is incorrectly specified的错误，之前没有碰到过，就随时记录下，备查。
Last unsuccessful login: Thu Mar 19 16:59:06 BEIST 2015 on /dev/pts/0 from 200.31.177.54
Last login: Thu Jul 16 22:44:20 BEIST 2015 on ftp from ::ffff:200.31.156.201
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* Welcome to AIX Version 5.3! *
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* Please see the README file in /usr/lpp/bos for information pertinent to *
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oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>ps -ef|grep ora_pmon_
oracle 348182 1 0 Apr 25 - 7:42 ora_pmon_DATAWDB
oracle 630842 1 0 Apr 25 - 20:02 ora_pmon_COGDB
oracle 843948 1 0 Apr 25 - 6:45 ora_pmon_ETLDB
oracle 5005418 4427974 0 09:44:03 pts/0 0:00 grep ora_pmon_
oracle@SJCk4:/home/oracle>ORACLE_SID=DATAWDB
oracle@SJCk4:/home/oracle>echo $ORACLE_SID
DATAWDB
oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jul 17 09:56:44 2015
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
Enter user-name:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
Enter user-name:
ERROR:
ORA-12162: TNS:net service name is incorrectly specified
SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
oracle@SJCk4:/home/oracle>echo $ORACLE_HOME
/app/oracle/product/10.2.0/db_1
oracle@SJCk4:/home/oracle>echo $ORACLE_SID
DATAWDB
oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>
oracle@SJCk4:/home/oracle>export ORACLE_SID=DATAWDB
oracle@SJCk4:/home/oracle>sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jul 17 09:59:27 2015
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL>
SQL>
[oracle@rhel6_lhr ~]$ oerr ora 12162
12162, 00000, "TNS:net service name is incorrectly specified"
// *Cause: The connect descriptor corresponding to the net service name in
// TNSNAMES.ORA or in the directory server (Oracle Internet Directory) is
// incorrectly specified.
// *Action: If using local naming make sure there are no syntax errors in
// the corresponding connect descriptor in the TNSNAMES.ORA file. If using
// directory naming check the information provided through the administration
// used for directory naming.
[oracle@rhel6_lhr ~]$
可以确定的是ORA-12162是由于ORACLE_SID未设置或者设置不正确导致的，推荐使用export ORACLE_SID=XXX来设置，当不能设置的时候再用ORACLE_SID=XXX来直接设置。
另外的一篇blog参考：