How to recover TNSNAMES.ORA file

Hi, im using Oracle 8i 8.16 database running on win2k server. Im getting a an error whenever i try to connect to the databese using the DBA Studio program - the error was "ORA-12154:TNS:Could Not resolve service name". I noticed that the TNSNAMES.ORA file is blank in the home directory of Oracle8i, anyone knows how to recover the file?.
Thanks
regards
Muraly

Hi Friend,
Thanks alot for ur reply, i tried the solution u gave in ur reply and i manage to get some parameters setting in my tnsnames.ora file - the content of it was
as follows :
# TNSNAMES.ORA Network Configuration File: C:\Oracle\Ora81\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle configuration tools.
COGENT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = cogent-w2ksvr)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = cogent)
but then i keep getting the same error message.
I notice that the Oracle service (undet the NT services) OracleOraHome81ManagementServer does not get started - when i try to manually start it up - NT return error saying its not startable due to windows error or application error.
The following is my setting from net8 assistant.
Service Naming
---- Service Identification ----
Service name = cogent
SID = ""
connection type = Database Default
Address Config
Protocol = TCP/IP
Hostname = cogent-w2ksvr
Port Number = 1521
My domain name is cogentconsulting.com
My Full computer name is cogent-w2ksvr.cogentconsulting.com
I really appreciate your help in this.
thanks and regards
Muraly
null

Similar Messages

How to use ODBC SQLDriverConnect() without using tnsnames.ora file

I have an ODBC application that connects to an Oracle 10g database. Currently, my SQLDriverConnect() function call uses the following connection string:
DRIVER={Oracle in OraClient10g_home1}; DBQ=MyDB.world; DBA=W; UID=foo; PWD=bar
This requires an entry in the tnsnames.ora file that looks like this:
MyDB.world =
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(ADDRESS =
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However, I would really like to be able to connect using ODBC without having to create that entry in the tnsnames.ora file. I have tried to substitute the DBQ=MyDB.world with the entire (DESCRIPTION=..... string from the original tnsnames.ora file, but it returns the error:
ORA-12154: TNS: Could not resolve the connect identifier specified.
I have heard others are able to use sqlplus with no tnsnames.ora file and the do specify the entire (DESCRIPTION=.... string on the sqlplus connection string, but is this possible to do using the ODBC SQLDriverConnect() function? If so, do I need to use a different keyword/value pair other than DBQ=?
Any help on this would be greatly appreciated.
Thank you.

How would that work in a load balanced configuration? Take a closer look at the tnsnames.ora example I included in my original post. I have 4 ADDRESS= sections to denote 4 servers that are part of the load balanced environment.
Also, I'm not familiar with that syntax, I need to use the syntax supported by the SQLDriverConnect() API function, which looks like this:
DRIVER={Oracle in OraClient10g_home1}; DBQ=MyDB.world; DBA=W; UID=foo; PWD=bar
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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.
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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 file does not seem to load in SQL Developer

I've really tried my best to figure this out on my own ... through the Help, this forum, and Internet in general. I apoligize in advance for having to ask this, since I'm sure this is a common issue. This particular form entry was really close:
Database Connections will not load tnsnames.ora
But, I just can seem to figure out why, or where entries from my tnsnames.ora file are loading into SQL Developer.
- I have the TNS_ADMIN system environment variable defined to the directory where tnsnames.ora is stored - C:\oracle\product\10.2.0\client_1\NETWORK\ADMIN.
- I do not see a TNS tab as the forum entry above indicates anywhere in SQL Developer - This may be my problem.
It seems that this issue could be cleared up with better directions on how to import tnsnames.ora entries into SQL Developer. Is there any specific direction on how to get your tnsnames.ora file setup correctly with SQL Developer running on Windows XP - Besides the Help which mentions the setup of TNS_ADMIN, but doesn't really tell you what the expected result is, or where the entries will be, or how to verify this is working?
Any help would be most appreciated.
Thanks,
Dave
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Using Windows XP/Vista...
After testing in our environment, it appears that SQL Developer 1.5.1 (5440) does in fact ignore the TNS_ADMIN environment variable and ONLY looks in the Oracle Home directory (network/admin). We define a central network location for our tnsnames file and have the tns_admin setup to point there instead of locally for our users.
When selecting to add a new connection (in 1.5.1, it works in previously releases... meaning 1.2.something) and selecting TNS, the drop-down remains empty. However, if I exit SQL Developer and then copy the tnsnames file to the local network/admin directory I can then re-launch SQL Developer and the drop-down is populated. Exiting SQL Developer again, deleting the local copy of tnsnames, and then launching SQL Developer yet again results in the drop-down being empty.
All other Oracle-related applications function as expected (as they have for years) using the TNS_ADMIN environment variable.
Any suggestions/ideas?

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

Hello,
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Hi Manish,
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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

"tnsnames.ora" file & ODBC driver

It seems ODBC drivers do not need TNS listeners!
I need to find out how ODBC drivers determine the path of "tnsnames.ora" file!
(I have many Oracle installations on my machine.)
null

I believe that the ODBC driver will use the tnsnames file in the primary Oracle home. You can use the Oracle home selector to select your primary home.
Note that, at the moment, the Oracle ODBC driver is supported only when installed in a single Oracle home on a machine.
Justin Cave

Using tnsnames.ora file instead of oracle names server

hi,
sqlnet.ora file contains
NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES)
NAMES.DEFAULT_DOMAIN = (domain name)
SQLNET.EXPIRE_TIME = 2
DEFAULT_SDU_SIZE = 8761
NAMES.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.world)
(PROTOCOL = TCP)
(Host = oranamesrvr0. domain name)
(Port = 1575)
NAME.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.world)
(PROTOCOL = TCP)
(Host = oranamesrvr0.domain name)
(Port = 1575)
There is also a tnsnames.ora file in the same path as this sqlnet.ora. Can someone tell how can i make the application use the tnsnames.ora file instead of using oracle name servers??
Thanks in advance!!!

917229 wrote:
hi,
sqlnet.ora file contains
NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES)
NAMES.DEFAULT_DOMAIN = (domain name)
SQLNET.EXPIRE_TIME = 2
DEFAULT_SDU_SIZE = 8761
NAMES.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.world)
(PROTOCOL = TCP)
(Host = oranamesrvr0. domain name)
(Port = 1575)
NAME.PREFERRED_SERVERS =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = TCP.world)
(PROTOCOL = TCP)
(Host = oranamesrvr0.domain name)
(Port = 1575)
There is also a tnsnames.ora file in the same path as this sqlnet.ora. Can someone tell how can i make the application use the tnsnames.ora file instead of using oracle name servers??
Thanks in advance!!!In addition to SB's comment, keep in mind that the client only sees sqlnet.ora and tnsnames.ora that exist on the client machine .. or indicated by TNS_ADMIN as defined on the client machine. Setting this on the db server is meaningless to the client unless the client also resides on the db server.

Strange Behaviour of TNSNAMES.ora file

Hello Guys,
Now we have 2 database servers with different IP obviously and same SID with 9i and 10g databases.
Our application is developed in forms 6i. Before 10g server, application was using 9i database server as its database and there were no problems. Developer client is installed at user's machine and they were having no connectivity issue with 9i database. Now after updation of database server. We have changed the IP address of tnsnames.ora file at every client machine. Now there is no information at client ends to connect with database 9i, but it must connect with 10g.
The client is still connecting with 9i database which is really strange. Just want to ask if connection information also need to be changes in some other file other then tnsnames.ora file.
Regards,
Imran

This is what making me worried, how the application is connecting with oracle 9i when TNS has no information about 9i server.
Well ifi we directly connect form builder with DB it does connects with 10g database, while the application is not. I have tried this.
Regards,
Imran

Can't srvctl command write tnsnames.ora file?

Hi,
I use srvctl to create a new service correctly, but I find the information of this service isn't written into tnsnames.ora file, it means, user can't connect database by directly using this service name, it's very stranger, who can tell me how to use srvctl to create a service and ensuer the information about this service can be correctly written into tnsnames.ora file?
#srvctl add service -d mm -s mx -r node1 -a node2.

Did you check tnsnames.ora for any new entries?
Yes,There are not any new entries for the new service I just created.
Check the command reference again, there is a flag to display "sample tns entries"
http://download.oracle.com/docs/cd/B19306_01/rac.102/b14197/srvctladmin.htm#i1008779
I check that documentation, and I can use that command to run in my RAC environment, the returned result is
Example client-side TNS entry for service mx:
mx = (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=db_vip)(PORT=dedicated_port
))(CONNECT_DATA=(SERVICE_NAME=mx)(FAILOVER_MODE=(TYPE=SELECT)(METHOD=BASIC
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BRs./Vinson

Replace local tnsnames.ora-files with OID

Hi there,
I would like to replace our local tnsnames.ora-files with an central OID-Instance. I know I will have to use the ldap.ora on clientside, but how can I add service names to the OID?
Is there any guide or manual which describes this functionality?
Best Regards

You need the Net Configuration Assistant, not Net Manager!
- select configure Directory Usage
- select correct type and name, and port(s)
- select correct default context (NOT cn=OracleContext!)
Next, you should be able to navigate to Local Naming, select an entry from your tnsnames.ora, and select from the mennu: Command->Directory->Export Net Service Names
- select one or more entries to be migrated

Undo deleted photo, how to recover a deleted file in iPad mini

how to undo deleted photo? how to recover a deleted file in iPad mini?

Unfortunately you can't. Except if you made a back up of your iPad on iTunes, restore it with the last save.
Hope I helped

1.2.0 reads TNSNAMES.ORA file multiple times and duplicates values in Alias

Since upgrading to 1.2.0.29.98 (clean install on Win XP SP 2), I have noticed that SQL Developer appears to be reading the TNSNAMES.ORA file multiple times. This results in the Network Alias pop-list on the TNS connection type to have duplicate values, although the number of duplicates for each entry varies widely - from four for the least that I saw and 252 for the most (assuming I counted that right :) ). We have approximately 270 entries in our TNSNAMES.ORA and the first entry in the file appears in the Network Alias list four times and the last entry in the file appears in the list 48 times.
To be honest, I switched to Basic JDBC connections with 1.1 and only noticed the problem because of some network performance issues - I thought that SQL Developer had hung and I switched on the debugging and could see that it was looping through the TNSNAMES.ORA file. Now that the network performance issues have been resolved, it still takes a little while to open the new connection window, but it is liveable, so I don't know whether the problem is 1.2 specific or not.

Sue,
I assume from a bit of testing, that "each tns file on the system" means each file in the TNS_ADMIN location that starts with TNSNAMES.ORA.
I set my TNS_ADMIN to a local location and copied the current TNSNAMES.ORA from the network location (and chopped it down to a handful of entries). When I restarted SQL Developer I only had a single copy of each alias. If I copied TNSNAMES.ORA to "Copy of TNSNAMES.ORA" I still only had a single copy of each alias. If I copied TNSNAMES.ORA to TNSNAMES.ORA.TXT I then had two copies of each alias.
Unfortunately, I don't have any say in the maintenance of the network TNS_ADMIN location and it has almost 200 backup copies of the tns file, typically named TNSNAMES.ORA.YYYYMMDD.
My TNS_ADMIN setting is done as a Windows environment variable. I do not have any TNS_ADMIN setting in my registry.

DBA studio: Error add/connect database "Failed to parse tnsnames.ora file"

I have Oracle (version 8.1.7) installed in my XP machine and when I try to (having chosen "Launch DBA Studio standalone") to open a connection I get:
"Failed to parse tnsnames.ora file
ERROR: 100 -- NLNV-NLNV String Format Error".
Also got this when I tried to manually add a database to a tree.
I can access the databases listed in my tnsnames.ora using SQL Plus with no error.
This is my tnsnames.ora.
# TNSNAMES.ORA Network Configuration File: C:\oracle\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
INST1_HTTP.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = MyMachine3)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = buch3ora)
(PRESENTATION = http://admin)
EXTPROC_CONNECTION_DATA.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
MyOra3.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = MyMachine3)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = ora3)
OORCL.xx.yy.GE.COM =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 3.4.55.66)(PORT = 1521))
(CONNECT_DATA = (SERVICE_NAME = oorcl))
Does anybody have any idea what is wrong? Thanks a lot. Changsong

Just found out this IS a string error in my Tnsname.ora. What i did is deleting all the entries in my tnsname.ora, and start adding each one back. I found one particular entry is responsible for the error. This is the old text
serv32.xxx.ge.com =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (COMMUNITY = TCP)(PROTOCOL = TCP)(HOST = sevr32.xxy.ge.com)(PORT = 1521))
(CONNECT_DATA = (SID = atmo32))
just looking by itself I can't see anything wrong. I just formatted it a little, making it looked like the other one that is working
serv32.xxx.ge.com =(DESCRIPTION =
     (ADDRESS_LIST =
     (ADDRESS =
     (COMMUNITY = TCP)
     (PROTOCOL = TCP)
     (HOST = sevr32.xxy.ge.com)
     (PORT = 1521)))
     (CONNECT_DATA=
     (SID = atmo32)))
and now it works fine. I Really can't tell the difference, except that some words were moved to the other line. What puzzled me is that the same old tnsname.ora worked in almost all the other circumstances, like sql plus, and other database enginee. But it is just not good enough for dba studio?
I admit I probably should have used the network utility to add a connection to avoid this type of format error.
Anyhow, I'm glad it is solved. by the way, the symjct.dll mentioned in the previous post should be symcjit.dll. I guess he mispelled the name. I renamed it to symcjit_old.dll and now the java error was gone. So that is another gain from this post. Thanks Joel for all the information.

Should dbassist create an entry in my tnsnames.ora file?

I just created an instance on Solaris with dbassist and the sample minimal.rsp response file (8.1.7). I was surprised to note that no entry was created in the tnsnames.ora file as I would expect (it does create an entry on Windows platforms). Is this typical behavior? I did not see any option in the response file to do this. Another thing I notice was that it created an entry in the oratab file with the auto start flag set to n. Is there a way to make dbassist set that flag to y during install or am I going to have to sed it afterwards?
Thanks,
John

1. Do I have to use the external IP address in the LISTENER.ora
file if I want clients external
to the firewall to connect to my database?No, you should simple use the internal address - there's no need
to use the external address. The packets that reach the server
do not contain the external address by the time they get to the
server. The firewall performs NAT on the external address
translating it to the internal address on the way in and
translating the internal address to the external address on the
way out.
2. If I change the entries in the LISTENER.ora file from
<production> to <172.168.0.101>, then
clients cannot connect to the database. Is this a normal
thing? I remember that I could use
internal IP addresses in ORACLE7 and 8 in the LISTENER.ORA
file.There must be something wrong with your DNS. If you run the
command "ping production" what address do you get? The external
address? If you attempt to ping 172.168.0.101 from a client that
can not connect, what do you get? What if you run the
command "tracert production"? What path do the packets take to
the server.
There sounds like there is some network topology issues in that
the clients can't get directly to the internal address but are
instead going through the firewall to get to the database. I
would suggest using a sniffer on the database (with the
appropriate authorization) to see what's going on and get a
network admin involved.
Regards,
Aaron C. Newman
Co-author, Oracle Security Handbook
[email protected]
Application Security, Inc.
www.appsecinc.com
phone: 212-490-6022
-Protection Where It Counts-

How to recover TNSNAMES.ORA file

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