Editing tnsnames.ora

Hey,
I am new to this can anyone help me configure tnsnames.ora file for connecting it with Toad.
I have Oracle 10g. I have never done this before.

Hm doesn't look to me as if you realy want to learn anything:
Re: Connect Oracle with TOAD
Installing Oracle Client for Connecting TOAD
But ok...
the tnsnames.ora is in $ORACLE_HOME/network/admin
The syntax is like that:
ALIAS =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = IPADRESS)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = SID)
)You have to change the italic values.
Dim

Similar Messages

DBUA editing tnsnames.ora file

SR 7030507.994
http://qmon.oraclecorp.com/qmon3/quickpicks.pl?t=t&q=7030507.994
Hi all,
Customer has set local_listener = '(ADDRESS = (PROTO =TCP)(HOST=themis)(PORT=1532))' . Then he used DBUA to upgrade from 10.2.0.3 to 10.2.0.4. Post upgrade, he noticed that DBUA has edited the tnsnames.ora file. Customer would like to know why DBUA should edit tnsnames.ora, as he has already set local_listener. Are there any advantages in this method?
Any ideas would be helpful.
Thanks,
Bagya

Hi,
This is the information from the trace.log .
trace.log
/opt/oracle/10g2cyc02/cfgtoollogs/dbua/cycltest/upgrade/PreUpgrade.log
[Thread-30] [9:36:44:756] [NetworkUpdateStep.executeImpl:194] ADD TNSEntry..
[Thread-30] [9:36:44:758] [NetworkUtils.getOneLocalListenerProtocolAddress:2734] host=null hostParam=themis.rac.com.au
[Thread-30] [9:36:44:758] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:36:44:759] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:36:44:759] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:36:44:759] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:36:44:760] [NetworkUtils.addTNSEntry:774] addTNSEntry:name=cycltest.rac.com.au
[Thread-30] [9:36:44:760] [NetworkUtils.addTNSEntry:775] addTNSEntry:addr=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:36:44:760] [NetworkUtils.addTNSEntry:776] addTNSEntry:globalDBName=cycltest.rac.com.au
[Thread-30] [9:36:44:760] [NetworkUtils.addTNSEntry:777] addTNSEntry:bDedicated=true
[Thread-30] [9:36:44:760] [NetworkUtils.addTNSEntry:778] addTNSEntry:sid=null
[Thread-30] [9:36:44:768] [BasicStep.configureSettings:304] messageHandler being set=oracle.sysman.assistants.util.UIMessageHandler@9bc984
[Thread-30] [9:36:44:793] [BasicStep.execute:202] Executing Step : DIR_SERVICE
[Thread-30] [9:36:44:793] [BasicStep.configureSettings:304] messageHandler being set=null
[Thread-30] [9:36:44:793] [DirServiceStep.executeImpl:145] ds registration not selected or user trying to modify entry that does not exist.
[Thread-30] [9:36:44:793] [BasicStep.configureSettings:304] messageHandler being set=oracle.sysman.assistants.util.UIMessageHandler@9bc984
/opt/oracle/10g2cyc02/cfgtoollogs/dbua/cycltest/upgrade/PostUpgrade.log
[Thread-30] [9:37:0:603] [NetworkUtils.getOneLocalListenerProtocolAddress:2734] host=null hostParam=themis.rac.com.au
[Thread-30] [9:37:0:603] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:603] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:604] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:604] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:605] [NetworkUtils.getOneLocalListenerProtocolAddress:2734] host=null hostParam=themis.rac.com.au
[Thread-30] [9:37:0:605] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:605] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:605] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:606] [NetworkUtils.getOneLocalListenerProtocolAddress:2856] Returning bestSoFar=(ADDRESS=(PROTOCOL=TCP)(HOST=themis.rac.com.au)(PORT=1532))
[Thread-30] [9:37:0:606] [EMConfiguration.run:228] Setting LISTENER_NAME=CYCLTEST, LISTENER_HOME=/opt/oracle/10g2cyc02, REP_DB_PORT=1532, REP_DB_HOST=themis.rac.com.au, REP_DB_SID=cycltest
Thanks,
Bagya

Tnsnames.ora file unable to edit in my Laptop

hi,
I have installed Oracle 10g on my personal laptop.
It worked fine on the day I installed.
Now I get tnsconnect timeout occured.
I searched the tnsnames.ora file and could not modify the file.
# tnsnames.ora Network Configuration File: D:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORCL =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.106)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
)Also I could connect to 192.168.1.106 console through web browser but today I get connection timeout error.
Can you please help me?
Thanks,
Nag.

please replace 192.168.1.106 with 172.0.0.1
in tnsnames.ora nad listener.ora
ORCL =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 172.0.0.1)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
# listener.ora Network Configuration File: D:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 172.0.0.1)(PORT = 1521))
export ORACLE_SID=orcl
restart listener
lsnrctl stop listener
lsnrctl start listener
tnsping orcl
conn scott/tiger@orcl
or
sqlplus / as sysdba

Tnsnames.ora is not working

Hello,
In my UAT envirnment we have 3 database on IBM AIX powerPC (64-bit) all are on 10.2.0.5.0
My listener.ora and tnsnames.ora is at default location $ORACLE_HOME/network/admin/
my listener is up
$ lsnrctl status
LSNRCTL for IBM/AIX RISC System/6000: Version 10.2.0.5.0 - Production on 04-MAR-2011 11:56:08
Copyright (c) 1991, 2010, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.5.0 - Production
Start Date 16-FEB-2011 18:51:16
Uptime 15 days 17 hr. 4 min. 52 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/10.2.0.1/db_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/product/10.2.0.1/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.16.8.17)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "preprod" has 1 instance(s).
Instance "preprod", status UNKNOWN, has 1 handler(s) for this service...
Service "uat" has 2 instance(s).
Instance "uat", status UNKNOWN, has 1 handler(s) for this service...
Instance "uat", status READY, has 1 handler(s) for this service...
Service "uat_XPT" has 1 instance(s).
Instance "uat", status READY, has 1 handler(s) for this service...
Service "uattest" has 2 instance(s).
Instance "uattest", status UNKNOWN, has 1 handler(s) for this service...
Instance "uattest", status READY, has 1 handler(s) for this service...
Service "uattest_XPT" has 1 instance(s).
Instance "uattest", status READY, has 1 handler(s) for this service...
The command completed successfully
i can remotely connected to database but on the same server tnsping is showing following error
$ tnsping UATTEST
TNS Ping Utility for IBM/AIX RISC System/6000: Version 10.2.0.5.0 - Production on 04-MAR-2011 11:59:09
Copyright (c) 1997, 2010, Oracle. All rights reserved.
Used parameter files:
/u01/app/oracle/product/10.2.0.1/db_1/network/admin/sqlnet.ora
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.17)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = uat)))
TNS-12535: TNS:operation timed out
or some time
ORA-12547: TNS: lost contact
remotely all the users are connected to listener but on the same server the operation is failed
I cant connect to other database using this tnsnames.ora file
can any one help me
regards
Bhushan
Edited by: user9176407 on Mar 3, 2011 10:38 PM

user9176407 wrote:
Thanks for the reply
In My server 3 database are there there a database by service name uat also present there
I check all the configuration the entries in my tnsnames.ora is as below
PREPROD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.17)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = preprod)
UAT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.17)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = uat)
UATTEST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.17)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = uattest)
conf_uat =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(HOST = 172.16.8.17)
(PORT = 1521)
(CONNECT_DATA =
(SERVICE_NAME = uat)
(SID = uat)
also my listner file entries are
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0.1/db_1)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = uat)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0.1/db_1)
(SID_DESC =
(SID_NAME = uattest)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0.1/db_1)
(SID_DESC =
(SID_NAME = preprod)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0.1/db_1)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.17)(PORT = 1521))
Ok, for your listener.ora file, above you have the SID_LIST and the LISTENER sections. But what is this that follows, below?
>
uat =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.8.17)(PORT = 1528))
SID_LIST_uat =
(SID_LIST =
(SID_DESC =
(SID_NAME = configdb)
(ORACLE_HOME = /u01/app/oracle/product/10.2.0.1/db_1)
which is working file
but i have an problem in my tnsname.ora file

EM doesn't allow creation of tnsnames.ora entry with service name orcl11gr2

Dear all,
I'm trying to create a net service name with EM Database Control, via Net Services Administration link. On the service name field, under the 'Edit Net Service Name' screen, I key in orcl11gr2, and it throws the the following error:
Validation Error
Examine and correct the following errors, then retry the operation:
Service Name - Specify a valid service name.
I wonder what is the extra validation that EM is checking. I assume it's checking the number of characters to be 8 characters or less.
Also, because of this extra validation that is in EM, all tnsnames.ora entry that have service name = orcl11gr2, I will not be able to use EM to modify them, as I will get the same above error.
But why does Oracle implements this extra validation, when the same validation is not implemented on other Oracle tools? For instance:
1. dbca allows me to create a database with instance_name greater than 8 characters, and the outcome of initialization parameters will be as follow:
db_name=orcl11gr -- truncated to 8 characters
instance_name=orcl11gr2
db_unique_name=orcl11gr2
service_names=orcl11gr2
2. Oracle Net Manager supports service name of orcl11gr2. The created Net Service Name, I have no problem connecting to the database.
3. Listener support orcl11gr2 service name
I'm using Oracle 11g R2 (11.2.0.1.0) for Microsoft Windows (x64), running on Windows 7.

For your reference, here is the bug numbner: 10278345.
-Mughees

ORA-12545 error after changing the host name as IP address in Tnsnames.ora

HI,
I tried to connect PHP and oracle in Red Hat linux. I got error ORA-12545 after changing the host name as IPAddress in Tnsnames.ora file. In sqlnet.ora file also i have entry for tnsnames in Directory_Path. I struggled so much but i couldnt solve that. Please give me ur valuable suggestions....

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.
Seems you specified wrong IP address.

How to deactivate an entry in tnsnames.ora file

Hi all,
I am working with Oracle 10g enterprise edition. I have a data source named with DEVDATA which should not be affected while I am working on my project. Usually, I will add DEVDATA entry in tnsname.ora file if I want to use it and I will remove that entry from tnsnames.ora file in order to protect that data source. It is very laborious process each time when I want to add or remove that entry. Do we have any mean such a way that I can switch between the two options. Currently, I have a desktop shortcut to tnsnames.ora file so that I can add or remove that entry when ever I want. Can we comment out that entry. Please suggest me.
I hope this is the right place to fire this question. If not, direct me. Thanks in advance.
Regards,
Kumar.

[email protected] wrote:
Hi all,
Thanks for your replays. As you said we can comment out lines with '#'. But, I am looking for commenting whole entry at a time. Can any one tell me how to comment out whole entry/paragraph. Is there any oracle utility by which we can deactivate the data source. Please suggest. Thank you.
Regards,
Kumar.As others have said, either comment out each line of the entry, or have two tnsnames files that you rename as needed. But really, how often do you make the swap that commenting/uncommenting about five lines of code is such a burden?

Oracle 8i clients, inconsistent handling of tnsnames.ora (ORA-06401 gotcha)

This is more of a bug report / oddity declaration than a real problem, though it was a pain in the butt to nail down. I post it here for the benefit of anyone else who may run into it down the road.
Using the linux sqlplus client, I kept getting consistent failures connecting to one of a dozen db's, but tests with the (java) netasst client worked fine. After various debugging of other potential causes, it came down to strace'ing the sqlplus client, and noting that it was attempting to connect to the wrong host, despite what was specified on the command line.
What we identified as the most probable cause:
The routines that load and parse the tnsnames.ora file differ between the linux and java clients, with the java client being more tolerant/robust. The tnsnames.ora file I'd been supplied with had come from a fellow user's Win32 machine, and had been edited there, which probably included a couple ^M's or other non-visible characters within the file.
The solution (at least, what I did):
Load the tnsnames.ora file with netasst, and save it again with netasst. Netasst wrote the file in a manner that sqlplus could read accurately, and I got to go have a beer.
- billn

Hi Fredrik,
You r right. But I have its entry in tnsnames.ora file. The entry looks like this -
My_Service_Name.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = tcp.world)
(PROTOCOL = TCP)
(Server = Computer_Name_of_Server_having_Ora8i)
(Host = IP_Add_of_Server_having_Ora8i)
(Port = 1521)
(Pipe = ORAPIPE)
(CONNECT_DATA = (SID = ORCL)
The same entry exists in the tnsnames.ora file on the local PCs (same office where the Oracle 8i Server is present) at Site 1 and these PCs connect the server without any problem.
Thanks
Lokesh

SQL Dev 3.0.04 cannot locate TNSNAMES.ora file after Oracle11g XE Beta

Hello,
I had Oracle Developer Suite (Reports, Forms) installed on Windows 7 32 bit along with SQL Developer 3.0.04 (latest prod. build) and everything was working just fine.
Then, I installed Oracle 11g XE Beta database and now, all the existing Connections in SQL Developer give an error "Invalid connection information specified. Verify the URL format for the specified driver."
I thought since 11gXE was the latest Oracle software installed, the Path environment variable in Windows will have the Oracle 11gXE as the leading path string. So, I cut this leading string : C:\Oracle\Oracle11gXE\product\11.1.0\db_1\bin and appended it at the very end.
This means that the Path that existed prior to the 11gXE install is now the leading and hence SQL Developer should be reading the TNSNAMES.ora file from the very first Oracle Home encountered which is for the developer suite. But this does not seem to work.
Any ideas how to fix this? How does SQL Developer determine which tnsnames file to use?
Thanks,
Manish

Hi Manish,
One place to control this is Tools|Preferences|Database|Advanced|Tnsnames Directory.
Otherwise read the documentation in Help|Table of Contents|SQL Developer Concepts and Usage|Database Connections. The third paragraph contains a description of the various alternatives.
Regards,
Gary Graham
SQL Developer Team
Edited by: gggraham on Jul 18, 2011 2:52 PM

Which TNSNAMES.ORA file to update???

Hi All
I have installed Oracle Apps on my local system and I regularly access one more database using internet which is on another server. Now for accessing my local apps database I can use Toad or PL/SQL Developer without modifying the TNS file.
But if I want to access the remote database I need to edit the TNS file. But I am not sure about which TNS file to edit as there are many TNS files on my system. viz. in Prodora, Prodappl, Proddb etc.
Which TNS file I need to update so that I can access the remote database?
Regards
Rahman

A few things:
Your three ORACLE_HOMEs:
Prodora -- This is the one that the applications CLIENT uses (i.e. the concurrent managers, forms, etc.. and actually contains two ORACLE_HOMEs (the 8.0.6 one and the iAS one)
Prodappl -- Is the APPL_TOP and shouldn't have a TNSNAMES under it anyway.
Proddb -- This is the one used by the database. Update the TNSNAMES entries under this ORACLE_HOME if you need access to another system via a database link.
Additionally, you shouldn't be editing the TNSNAMES.ora or LISTENER.ora files directly in an autoconfig-managed applications environment. The PROPER thing to do is to edit the INCLUDE FILE.
If you look at the bottom of your autoconfig managed tnsnames.ora or listener.ora files, you will see an "IFILE=" entry that points to a (either zero-byte or non-existent) file. Put your customizations in there. This way you can be ensured that they won't be clobbered by AutoConfig. Additionally, when you copy things around for cloning, just rename the file on your target.
-- James

Odd issue in tnsnames.ora

Hi guys,
In my tnsnames.ora, there's a section as below:
# Production
QDBSP =
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = qdb.lipt.com)(PORT = 1521))
    (CONNECT_DATA =
      (SERVICE_NAME = qdb.amers.ime.tes.com)
      (SERVER = DEDICATED)
)it works perfect, but after i changed local name QDBSP to QDBSP2, when I try to connect to it via sqlplus, I get this:
ORA-12545: Connect failed because target host or object does not existwhen i change it back to QDBSP, it works, change to QDBSP2, fail again....
has anyone been in the same situation? or any clues?
many thanks.

Hi,
ORA-12545: Connect failed because target host or object does not existplease post the below output
ping qdb.lipt.comit seems mentioned hostname is unreachable.
ORA-12545:
     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.

How to add an entry to TNSNAMES.ORA?

Hello,
if I add the following entry to the TNSNAMES.ORA:
test1_10.121.34.56 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.34.56)(PORT = 1521))
(CONNECT_DATA =
(SID = test1)
(SERVER = DEDICATED)
how could I activate it please without rebooting?
I'm using Oracle 9i Release 9.2.0.8.0 at CentOS 4.7
Linux machine (which is compatible to RHEL 4.7).
Thank you
Alex

Hello all, thank you for your support.
Could we please start from the beginning?
(and I'll use the real IP addresses this time, sorry)
{color:#0000ff}oracle@ablora01:admin> host ablora01.internal.XXX.com
ablora01.internal.XXX.com has address 10.121.42.100
{color}
I have neither sqlnet.ora nor listener.ora and
I have the following 2 entries in my tnsnames.ora:
{color:#0000ff}oracle@ablora01:admin> ll /abl/apps/oracle/9.2/network/admin/
-rw-r--r-- 1 oracle oinstall 825 Jul 26 2003 libnk59.def
drwxr-xr-x 2 oracle oinstall 4096 Nov 5 16:25 samples
-rw-r--r-- 1 oracle oinstall 130 Mar 18 2002 shrept.lst
-rw-r--r-- 1 oracle oinstall 24 Aug 7 2000 snmp_ro.ora
-rw-r--r-- 1 oracle oinstall 717 Nov 5 17:15 sqlnet.log
-rw-r--r-- 1 oracle oinstall 756 Nov 5 17:08 tnsnames.ora
oracle@ablora01:admin> cat /abl/apps/oracle/9.2/network/admin/tnsnames.ora
# TNSNAMES.ORA Network Configuration File: /abl/apps/oracle/9.2/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
TEST1_10.121.42.81 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.81)(PORT = 1521))
(CONNECT_DATA =
(SID = test1)
(SERVER = DEDICATED)
BOCHUM_10.121.42.100 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.100)(PORT = 1521))
(CONNECT_DATA =
(SID = BOCHUM)
(SERVER = DEDICATED)
{color}
When I try to tnsping the first entry it works:
{color:#339966}oracle@ablora01:admin> tnsping BOCHUM_10.121.42.100
TNS Ping Utility for Linux: Version 9.2.0.8.0 - Production on 05-NOV-2008 17:19:34
Copyright (c) 1997, 2006, Oracle Corporation. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.100)(PORT = 1521))) (CONNECT_DATA = (SID = BOCHUM) (SERVER = DEDICATED)))
OK (0 msec)
{color}
When I try to tnsping the 2nd entry it fails:
{color:#ff0000}oracle@ablora01:admin> tnsping TEST1_10.121.42.81
TNS Ping Utility for Linux: Version 9.2.0.8.0 - Production on 05-NOV-2008 17:20:21
Copyright (c) 1997, 2006, Oracle Corporation. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.81)(PORT = 1521))) (CONNECT_DATA = (SID = test1) (SERVER = DEDICATED)))
TNS-12541: TNS:no listener{color}
When I look at the listener I get:
{color:#339966}oracle@ablora01:admin> lsnrctl status
LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 05-NOV-2008 17:21:55
Copyright (c) 1991, 2006, Oracle Corporation. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(PORT=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 9.2.0.8.0 - Production
Start Date 04-NOV-2008 17:35:04
Uptime 0 days 23 hr. 46 min. 50 sec
Trace Level off
Security OFF
SNMP OFF
Listener Log File /abl/apps/oracle/9.2/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ablora01.internal.XXX.com)(PORT=1521)))
Services Summary...
Service "BOCHUM" has 1 instance(s).
Instance "BOCHUM", status READY, has 1 handler(s) for this service...
Service "test1" has 1 instance(s).
Instance "test1", status READY, has 1 handler(s) for this service...
Service "test1XDB" has 1 instance(s).
Instance "test1", status READY, has 1 handler(s) for this service...
The command completed successfully{color}
When I try sqlnet it first fails and I have to reenter password:
{color:#339966}{color:#ff0000}oracle@ablora01:admin> sqlplus scott/tiger@TEST1_10.121.42.81
SQL*Plus: Release 9.2.0.8.0 - Production on Wed Nov 5 17:10:42 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
{color:#ff0000}ERROR:
{color}{color:#ff0000}ORA-12541: TNS:no listener
{color}{color}
{color:#ff0000}{color:#ff0000}Enter user-name: scott
Enter password:{color}
Connected to:
Oracle9i Release 9.2.0.8.0 - Production
JServer Release 9.2.0.8.0 - Production
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
BONUS TABLE
DEPT TABLE
EMP TABLE
SALGRADE TABLE
{color}
Do you please know, why it complains about the missing listener?
And my actual target is to allow a program from 10.121.42.81
to connect to the "test1" instance.
Regards
Alex
Edited by: user10507116 on Nov 5, 2008 12:29 PM

Can i use the default value in TNSNAMES.ora file

Hai , i connect the Vb to oralcle using Oracle data access component , and i have read the documentation for ora file.
Most documentation show to connect oracle with vb.net , the ora file must be modified.
My questions is , can i directly connect to Oracle without modify the ora file ?
Thank You

Thank you for the reply. I will read the documentation first.
I install the oracle 10g express edition . Hence , i have two user , the sys an the other is hd.
How the TNSNAMES.ora known i want connect to which username ?
Thank you

How to list the datasources without use a tnsnames.ora file?

Hi,
I want to use the OracleDataSourceEnumerator class of ODP.Net to list the datasources on which the user can connect.
It's work with a tnsnames.ora on the local station, so good.
But I want use the easy connect naming methode so i have edited the sqlnet.ora file with this:
NAMES.DIRECTORY_PATH= (EZCONNECT, TNSNAMES)
then i have deleted the content of the tnsnames.ora
so my code don't work : none datasource is returned by the OracleDataSourceEnumerator
So my question : is it a way to list the datasources without use a tnsnames.ora file?
Edited by: user13499556 on 17 déc. 2010 08:21

You can check
DataConnectionFile.EnumerateDependants method
This post is my own opinion and does not necessarily reflect the opinion or view of Slalom.

Tnsnames.ora General Question

We are experiencing a problem that many different users seem to have many different versions of tnsnames.ora. We want to create our "gold" version and ensure that everyone uses the same one. Two questions:
1. Is the "alias" that you give each connection case sensitive? For instance if I name one connection Prod is that the same as PROD?
2. At another place I worked I was under the impression that most applications (PL/SQL Developer for sure) uses the Windows PATH environment variable to locate tnsnames.ora by going through all directories listed in the variable and using the first occurrence of tnsnames.ora that it found. Through a little testing and renaming and such I have found that this doesn't appear to be the case. We are using ADI, Discoverer, different development tools, etc and would like to avoid having more than one location where the file is stored. What is the best way around that or is there a way? I assume that it depends somewhat on each application.
Thanks in advance for the help!

PL/SQL Developer Help->Support Info TNS Names tab shows that C:\oracle\ora92\network\admin\tnsnames.ora is used as my tnsnames.ora for the application. I don't have an ORA_HOME environment variable. So where is it coming from? The path above is in my PATH variable.
So it is different for every application?
I don't have TNS_ADMIN environment variable either.
Sorry for the dumb questions. I just want to be 100% clear.
Message was edited by:
mateoc15

Editing tnsnames.ora

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