ORA - 12154 TNS:couldnot resolve service name

hi all
Thank you for all your support .
Now i am facing a problem . I am using oracle 9i and TOAD 7.3 . we have 4 machines .We can connect to Oracle server from 3 machines through toad .
But from my machine its showing the above error .But i can connect to the server through RUN (sqlplus username/password@databasename) .
When i uninstall the TOAD and if i connect it's getting connected. If i shutdown the system and try to connect through TOAD , it will display the error again .
I copied the sql.net and tnsnames.ora file from other machines which are connecting properly ,then also its not working .
If anybody knows about this please help me
thanks & regards

Oracle networking client gets an alias via @databasename.
Networking looks up that alias in TNSNAMES.ora - if there is no '.' at the end of the alias it checks the SQLNET.ora for the possibility of a default domain to append.
It selects the alias from TNSNAMES.ora ...
- TNS_ADMIN points elsewhere = ORA-12154
- wrong tnsnames.ora when multiples exist (common) = ORA-12154
- no tnsnames.ora = ORA-12154
- no alias = ORA-12154
and other reasons found http://download.oracle.com/docs/cd/B19306_01/network.102/b14212/troublestng.htm#CEGJAGGH

Similar Messages

ORA-12154 - TNS couldnt resolve service name

I have created the following db link :
CREATE DATABASE LINK RAN.WORLD
CONNECT TO <>
IDENTIFIED BY <>
USING 'DCCCSN1'
select * from [email protected]
This gives ORA-12154 - TNS couldnt resolve service name
Can someoen advice regarding this please ? I can use the user id and password used to create the db link to connect to the database .Also from command prompt TNSPING DCCCSN1 -also works .So there should be nothing wrong with the TNS entries .Thanks .

Just want to emphasize on the same point Legatti mentioned.
The tns entry you mentioned must exist in the tnsnames.ora of the server where the your database (where the dblink has been created) resides.
Lot of times people think that the tns entry is required on the machine you running the command from, which is wrong.
Thanks,
Ankit.

12154: "Could not resolve service name"

[oracle@proton dbs]$ sqlplus system/manager@bcqa
SQL*Plus: Release 8.1.7.0.0 - Production on Fri May 4 16:00:00 2001
(c) Copyright 2000 Oracle Corporation. All rights reserved.
ERROR:
ORA-12154: TNS:could not resolve service name
I have read many documentations and I have no clue on what I'm doing wrong.. Here are the contents of a few .ora files:
listener.ora
LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = proton.cityxpress.com)(PORT = 1521))
(PROTOCOL_STACK =
(PRESENTATION = TTC)
(SESSION = NS)
tnsnames.ora
PROTON.CITYXPRESS.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.11.19)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = bcqa.cityxpress.com)
sqlnet.ora
NAMES.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = dbhost)(PORT = 1575))
NAMES.DEFAULT_DOMAIN = cityxpress.com
SQLNET.EXPIRE_TIME = 0
NAMES.DIRECTORY_PATH=(HOSTNAME)
lsnrctl started with no problem and here's the output from lsnrctl status:
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>
[oracle@proton admin]$ lsnrctl status
LSNRCTL for Linux: Version 8.1.7.0.0 - Production on 04-MAY-2001 16:10:13
(c) Copyright 1998 Oracle Corporation. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=proton.cityxpress.com)(PORT=1521))(PROTOCOL_STACK=(PRESENTATION=TTC)(SESSION=NS)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 8.1.7.0.0 - Production
Start Date 04-MAY-2001 16:10:06
Uptime 0 days 0 hr. 0 min. 7 sec
Trace Level off
Security OFF
SNMP OFF
Listener Parameter File /usr/oracle/network/admin/listener.ora
Listener Log File /usr/oracle/network/log/listener.log
The listener supports no services
The command completed successfully
[oracle@proton admin]$
<HR></BLOCKQUOTE>
Here's the output from using tnsping:
[oracle@proton admin]$ tnsping proton.cityxpress.com
TNS Ping Utility for Linux: Version 8.1.7.0.0 - Production on 04-MAY-2001 16:11:22
(c) Copyright 1997 Oracle Corporation. All rights reserved.
Attempting to contact (ADDRESS=(PROTOCOL=TCP)(HOST=proton.cityxpress.com)(PORT=1521))
OK (0 msec)
That's good, but look at this one:
[oracle@proton admin]$ tnsping proton
TNS Ping Utility for Linux: Version 8.1.7.0.0 - Production on 04-MAY-2001 16:12:11
(c) Copyright 1997 Oracle Corporation. All rights reserved.
TNS-03506: Failed to create address binding
Any help would be greatly appreciated, thanks.

you have a listener problem at least.
The status request to lsnrctl reports "no service". If the listener does not support any service, no connection.
configure a service using "netasst".
Regards
null

Tns could resolve service name

I have oracle 9i client installed in my machine
I have installed oracle 9i DS - complete
I have copied my tnsnames.ora from oracle_home of my client to DS - Home - Network-Admin folder.
I able to test my connection in net manager but when I connect thru forms builder it says ora-12154 tns could not resolve service name
I have also manually created the tnsnames.ora thru net8 manager but still I am getting the same problem
Please can anyone help on this

Shasi,
Frank really is right. This is a network configuration problem, particularly the tnsnames.ora (and possibly but unlikely the sqlnet.ora).
Try connecting from the sql plus in the Oracle Home where Forms & Reports are. You'll get the same error message. You can try to copy the same files over from the database if you're able to connect from that SQL Plus using username/password@connectstring successfully,
This problem is one we see all the time and is always (maybe a Powerball lottery's odd change it's something else) network configuration files. Make sure they are in the right Oracle Home (Forms & Reports) and that the ones you have work somewhere else.

TNS-12154 Could Not Resolve Service Name

I'm getting this error when I try to access the database from a Windows.NET program. What's even more frustrating is that I had it working before. I must have inadvertently changed something in the Oracle or network settings
I'm baffled by this error because TNSPING and SQLPlus to the same service are being accessed without a hitch.
Anyone have an idea where I might find the problem or how to test for it?
Thanks in advance!

Does .net still use ODBC? If so go into your control panel, Administrators tools, ODBC Administration and check out what you set up.
Just a shot in the dark but who knows
-- Mark D Powell --

ORA-12154: TNS Couldnot reslove the connect identifier specified.

Hi,
I am new to Oracle, I have installed Oracle 10g Express edition.
and then i installed PL/SQL Developer, but when i try to connect thru PL/SQL i get the error 12154. I am able to connect to DB from Webpage(http://127.0.0.1:8080/apex) and also i able to connect to the DB from SQL Run command using below command.
SQL*Plus: Release 10.2.0.1.0 - Production on Sun May 6 18:03:56 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
SQL> connect system/punit@XE
Connected.
SQL>
And following is the TNS file entries:
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Pony)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
Please help me in connecting to DB using pl/sql
Thanks in advance
Punit

Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Pony>lsnrctl start
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 08-MAY-2012 23:48:34
Copyright (c) 1991, 2005, Oracle. All rights reserved.
TNS-01106: Listener using listener name LISTENER has already been started
C:\Users\Pony>lsnrctl status
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 08-MAY-2012 23:48:54
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production
Start Date 08-MAY-2012 22:48:09
Uptime 0 days 1 hr. 0 min. 48 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File C:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.
Listener Log File C:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.lo
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Pony)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Pony)(PORT=8080))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
The command completed successfully
C:\Users\Pony>lsnrctl service
LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 08-MAY-2012 23:49:18
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1002 state:ready
DISPATCHER <machine: PONY, pid: 4636>
(ADDRESS=(PROTOCOL=tcp)(HOST=Pony)(PORT=49161))
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
C:\Users\Pony>

TNS : Cannot resolve service name

hi i am able to connect to the database (server 10g and client also 10g)
i mailed the tns entry and gave it to another guy who has oracle 9i (client) installed
he added the entry to his tns file but unable to connect to the db
plz help

something like this...login to cmd promt and then tnsping database_name
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
H:\>tnsping orcl
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 08-APR-2009 13:
12:26
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
C:\oracle\product\10.2.0\db_2\network\admin\sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = msn048034c)(POR
T = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl)))
OK (60 msec)
H:\>

Tns coulnot resolve service name problem on serverside alone

Hi all,
i have a problem in serverside tnsnames.ora when i try to connect from client to server i am able to connect whereas if i am trying to open the sqlplus with the same username on server i couldn't connect i receive this error
Sathish aravamuthan

I just resolved this same problem, so maybe this will help you. From the server try the following:
Do you have $TNS_ADMIN defined in your environment variables? echo $TNS_ADMIN
cd $TNS_ADMIN
Are sqlnet.ora and tnsnames.ora located here?
When you type "tnsping test.world" does tnsping show that it's using the same sqlnet.ora and tnsnames.ora files that you're viewing? {test.world is a real database for me, so choose an appropriate substitute}
Does the tnsping show OK (0 msec)?
Did you FTP these files from another server? You MUST transfer them in ASCII (not the Linux FTP default of binary). The binary FTP seems to cause the OK (0 msec) problem.
Does your sqlnet.ora have the following line?
SQLNET.AUTHENTICATION_SERVICES= (NTS)
Make sure to delete that if it does.

TNS:cannont resolve service name

i can't understand why this message comes over when i work in form designer in spite of i write the right name of the database
i work in windows system any one can help me

i think you must have not added the database string in tnsnames.ora. please check that if it is added in the file. then try running.

TNS couldpt resolve service name

Hi all,
I installed Orale8i on win 2000 server.Later i deinstalled and installed Oracle 9.0.2 on Win 2000 server.I am successfully logging into Oracle 9i through
SQL Plus.If i try to log in Oracle thru TOAD getting following error
Building Oracle HOMES List
HOME Name OraHome81 added to list.
HOME Name OraHome91 added to list.
Found multiple homes, searching each HOMEx for valid PATH
searching in SOFTWARE\ORACLE\HOME0
Oracle_Home found in SOFTWARE\ORACLE\HOME0 IS in system path!
searching in SOFTWARE\ORACLE\HOME1
oci.dll found

Do you have a backup of your registry? Mucking around with registry entries around Oracle Home's is notoriously difficult because lots of keys reference each other. It's certainly possible to fix everything, but it isn't a simple process.
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Could not resolve service name when installing Mobile Server

Hi,
when installing mobile server I am prompted for the SYSTEM pwd and then get "ORA-12154: Could not resolve service name". I install lite in a different home (LITE_HOME) than the database. Database's TNSNAMES.ORA looks like (I added the webtogo.world entry myself)
===================== TNSNAMES.ORA =================
WEBTOGO.WORLD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(Host = localhost)
(Port = 1521)
(CONNECT_DATA = (lite.oracle)))
LITE.PL.ORACLE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = lite.oracle)
=======================================
Then installing lite I enter localhost/1521/lite.oracle
I can connect from sqlplus:
sqlplus system/manager@lite
Java version is 1.3.1_08, which I think is correct.
Does anyone have any ideas? Thanks in advance.
Best regards,
Pawel

Hi,
When you install Oracle Lite the valid TNSNAMES.ora becomes the one that is coming with Oracle Lite.
From now on when you must create a tns name you must create it in the Oracle Lite's tnsnames.ora file unless you specify which tnsnames file you will use in the registry.
You can find tnsnams.ora file in the below path:
<OracleLite_HOME>\network\admin\
Regards,
Bogac OZGEN

Could not resolve service name

Hi friends.
I have this problem where want conect to database 9i: ERROR: "12154" could not resolve service name".
I was see LISTANER.ORA, TNSNAMES.ORA, SLQ.ORA files and not seem anything wrong.
I have install Oracle 9i database enterprise release 2 (9.2.0.1) server and client, also developer site 10g(9.0.4), all these in my personal Pc.
Thanks to all.

Thanx for the reply...Justin
Yes, I am sure I only have one Oracle Home...
Anyways, here is the tnsnames file content:
# TNSNAMES.ORA Network Configuration File: C:\ShafHome\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
SHAF =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = home-3770fh0hi3)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = shaf.world)
INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = home-3770fh0hi3)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = MODOSE)
(PRESENTATION = http://HRService)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC2))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
Thanx,
Shaf

ORA-12154: TNS:could not resolve service name

Hi Guru's
i applied Maintainacepack 3480000 patch on my application for upgrading 11.5.7 to11.5.10.2, after completion of patch, I run the autoconfig it has given bellow error, please anybody can help me, i need to finish my task immediately, please provide me the solution.
autoConfig Profile Phase
Running Profile Process 1 of 1 for CLN_TOP
Executing script in InstantiateFile:
/sgmtemp/prodcomn/admin/install/MSBEP004_dcpsr006osm/clnadmprf.sh
script returned:
clnadmprf.sh started at Sun Feb 17 06:24:13 WST 2008
The environment settings are as follows ...
ORACLE_HOME : /sgmtemp/prodora/8.0.6
ORACLE_SID :
TWO_TASK : msbep004
PATH : /sgmtemp/prodora/iAS/Apache/perl/bin:/sgmtemp/prodora/8.0.6/bin:/sgmtemp/prodappl/fnd/11.5.0/bin:/sgmtemp/prodappl/ad/11.5.0/bin:/sgmtemp/prodcomn/util/jre/1.1.8/bin:/sgmtemp/prodcomn/util/unzip/unzip::/sgmtemp/prodora/8.0.6/bin:/usr/bin:/usr/ccs/bin:/usr/sbin:/sgmtemp/prodora/iAS/Apache/perl/bin:/sgmtemp/prodora/iAS/Apache/perl/bin:/sgmtemp/prodora/8.0.6/bin:/sgmtemp/prodcomn/util/jre/1.1.8/bin:/sgmtemp/prodcomn/util/unzip/unzip:/sgmtemp/prodora/8.0.6/bin:/usr/bin:/usr/ccs/bin:/usr/sbin:/usr/java14/jre/bin:/usr/java14/bin:/usr/bin:/etc:/usr/sbin:/usr/ucb:/sgmtemp/prodappl/bin:/usr/bin/X11:/sbin:/usr/lpp/pd/bin:.
LD_LIBRARY_PATH : /sgmtemp/prodora/8.0.6/network/jre11/lib/aix/native_threads:/sgmtemp/prodappl/cz/11.5.0/bin:/sgmtemp/prodora/8.0.6/lib:/usr/dt/lib:/usr/openwin/lib
Executable : /sgmtemp/prodora/8.0.6/bin/sqlplus
SQL*Plus: Release 8.0.6.0.0 - Production on Sun Feb 17 06:24:13 2008
(c) Copyright 1999 Oracle Corporation. All rights reserved.
ERROR:
ORA-12154: TNS:could not resolve service name
clnadmprf.sh exiting with status 1
ERRORCODE = 1 ERRORCODE_END
.end std out.
thanks

Please Apply "Patch 5985992 - TXK AUTOCONFIG ROLLUP PATCH Q (JUL/AUG 2007)", run AutoConfig, and check then.

Fundamental Problem: ORA-12154: TNS:could not resolve service name

Hello,
I am faced with a fundamental problem:
ORA-12154: TNS:could not resolve service name
I can say with a high level of confidence that the TNSNAMES.ora configuration file is not the problem. My peer is using the exact same file with no issues. I am using the TOAD database utility to connect to the db host. Also, I have ORACLE_HOME defined and the file is located in /network/ADMIN.
Any ideas?

Hello,
Make sure your toad looking into right tnsnames.ora; also try this from command line after adding following entry to your tnsnames.ora.
sqlplus username/password@ECDEV
ECDEV =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS =
        (PROTOCOL = TCP)
        (HOST = rscdd01) --> you can try ipaddress of your server name as well
        (PORT = 1521)
    (SDU = 8192)
    (CONNECT_DATA =
      (SERVICE_NAME =ECDEV)
      (INSTANCE_NAME=ECDEV)
)Edited by: OrionNet on Dec 23, 2008 2:22 PM

MSDAORA,IIS,ORA-12154: TNS:could not resolve service name

Hi All,
I have a Web Service that coded in VS2008, using ORACLE DB(9i).
At a time the application working fine and I can access and do everything with database.
Some other time database server is down for scheduled maintenance. If I try to run the application at this point of time it will raise err "ORA-12154: TNS:could not resolve service name".
When i reset iis it start to work fine for a while.Then same problem occurs again.
My connection string is connectionString="provider=MSDAORA.1;data source=***;user id=***;password=***;"
is there any solution?
i tried that;
If theire is multiple copies of OCIW32.dll you have to make sure that there is only one copy of OCIW32.dll which should be in /Bin folder of the oracle home folder.
Add the IUSR_machine name account and the IWAM_machine name account to the Oracle home folder. Give both accounts full control.
Create empty file tnsnames.ora in same directory as aspnet_wp.exe,

Hi,
The issue doesnt make much sense on the surface at least. 12154 means the client couldnt figure out what you were referring to with your Data Source= entry. If the database was taken down, I'd expect an "oracle not available" or some other sort of error, as the client should have still be able to resolve the entry at least, even if the database wasnt up at the time.
What do you mean by "When i reset iis it start to work fine for a while.Then same problem occurs again."? The same problem meaning you get 12154 when you take the database down? Or you get 12154 without a db restart?
Are you using TNSNames.ora for client naming resolution, or something else (ldap, for example)?
Greg

ORA - 12154 TNS:couldnot resolve service name

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