OraFAQ Forum: Networking and Gateways

Home » RDBMS Server » Networking and Gateways » ora-12541 error

Show: Today's Messages :: Polls :: Message Navigator
E-mail to friend

ora-12541 error [message #118382]

Wed, 04 May 2005 16:11

wsyeager
Messages: 8
Registered: May 2005

Junior Member

While trying to establish a connection via an oracle dataadapter from within visual studio, I am getting the infamous : "ORA-12541: TNS:No Listener" msg.

I may also get the "ORA-12514:TNS:Listener does not currently know of service requested in connect descriptor"

I have allowed access to ORACLE.EXE with my mcAfee personal firewall.

I am able to TNSping my server.

The "OracleOraDb10g_home1TNSListener" windows service is Started. I've even tried restarting it.

Here is the contents of my tnsnames.ora file:

# tnsnames.ora Network Configuration File: C:\oracle\product\10.1.0\Db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)

Here is the contents of my Listener.ora file:

# listener.ora Network Configuration File: C:\oracle\product\10.1.0\Db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(PROGRAM = extproc)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
)
)
)

I'm really tearing my hair out on this one. Can someone please help me with this error.

I'm typing in "DBTYZQ41" as my server name within visual studio and entering my "SYSTEM" userid and my password which I know is correct.

I can't believe it's this hard to work with ORACLE and resolve a simple connection issue.

Report message to a moderator

Re: ora-12541 error [message #118428 is a reply to message #118382]

Thu, 05 May 2005 03:27

girish.rohini
Messages: 744
Registered: April 2005
Location: Delhi (India)

Senior Member

Add the following entry in listener.ora file under the SID_LIST parameter & then try:

(SID_DESC =
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(SID_NAME = orcl)
)

Report message to a moderator

Re: ora-12541 error [message #118534 is a reply to message #118428]

Thu, 05 May 2005 13:23

wsyeager
Messages: 8
Registered: May 2005

Junior Member

I'm trying to configure an oracle dataadapter within VS.NET 2003, and am having problems doing so.

I wanted to find out if the OracleDataAdapter is capable of generating Typed Datasets....

I keep getting the error:
"Microsoft DataLink Error
Test connection failed because of an error in initializing provider. ORA-12514: TNS:listener does not currently know of service requested in connect descriptor"

I am placing the server name of: DBTYZQ41 and a Username of: "SYSTEM" and my password as something else. When I try testing the connection, I get the above error.

Here is some more info:
While trying to establish a connection via an oracle dataadapter from within visual studio, I am getting the infamous : "ORA-12541: TNS:No Listener" msg.

I may also get the "ORA-12514:TNS:Listener does not currently know of service requested in connect descriptor"

I have allowed access to ORACLE.EXE with my mcAfee personal firewall.

I am able to TNSping my server.

I can connect to the DBTYZQ41 server via SQLPlus by typing in "SYSTEM" for the UserID and my password as something else.

The "OracleOraDb10g_home1TNSListener" windows service is Started. I've even tried restarting it.

Here is the contents of my tnsnames.ora file:

# tnsnames.ora Network Configuration File: C:\oracle\product\10.1.0\Db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)

Here is the contents of my Listener.ora file:

# listener.ora Network Configuration File: C:\oracle\product\10.1.0\Db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(PROGRAM = extproc)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
)
)
)

When I also hover my mouse over the "Oracle Explorer" tab, just the Oralce Output window comes up and no databases are shown.

I'm really tearing my hair out on this one. Can someone please help me with this error.

I'm typing in "DBTYZQ41" as my server name within visual studio and entering my "SYSTEM" userid and my password which I know is correct.

I can't believe it's this hard to work with ORACLE and resolve a simple connection issue. I've unistalled and reinstalled the 10g database software 3 times, and I refuse to do it any further.

How can I properly configure this connection issue? No wonder why ORACLE needs a DBA to administer it. It's simply too cumbersome for a developer to configure and work with.

The above errors (ORA-12514 & ORA-12541) appear all over the internet, but there doesn't seem to be a definite resolution to fix any of them. Anything that you try, doesn't fix the problem.

Does anyone know how this can be resolved???

Report message to a moderator

Re: ora-12541 error [message #118641 is a reply to message #118534]

Fri, 06 May 2005 11:49

girish.rohini
Messages: 744
Registered: April 2005
Location: Delhi (India)

Senior Member

Use the following listener.ora file:

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(SID_NAME = orcl)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
)
)
)

After refreshing listener type the following at the command prompt:

tnsping orcl

If u get OK response then ur listener configuration is fine.

Report message to a moderator

Re: ora-12541 error [message #118645 is a reply to message #118641]

Fri, 06 May 2005 13:09

wsyeager
Messages: 8
Registered: May 2005

Junior Member

I configured the "Listener.ora" file as per your specs and rebooted the machine.

I then went into a command prompt and tried the "tnsping orcl" command. I got the following result in my attached file...

/forum/fa/124/0/

This is the contents of my Listener.ora file:
# listener.ora Network Configuration File: C:\oracle\product\10.1.0\Db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(PROGRAM = extproc)
)
(SID_DESC =
(ORACLE_HOME = C:\oracle\product\10.1.0\Db_1)
(SID_NAME = orcl)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
)
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
)
)
)

This is the contents of my SQLNET.ora file:
# sqlnet.ora Network Configuration File: C:\Oracle\product\10.1.0\Client_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

What step should I take next? Sorry for the newbie questions, but I'm not an ORACLE DBA. Thanks so much for your help in advance....

Attachment: tnsping response.JPG
(Size: 127.04KB, Downloaded 11050 times)

Report message to a moderator

Re: ora-12541 error [message #118653 is a reply to message #118645]

Fri, 06 May 2005 13:37

Mahesh Rajendran
Messages: 10707
Registered: March 2002
Location: oracleDocoVille

Senior Member
Account Moderator

>>SQLNET.AUTHENTICATION_SERVICES= (NTS)

>>NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
COmment these entries and try again.
Make sure you have the listener service running ( goto control panel/ services and start the listener service or from command prompt use
lsnrctl start.)

Report message to a moderator

Re: ora-12541 error [message #118663 is a reply to message #118653]

Fri, 06 May 2005 15:00

wsyeager
Messages: 8
Registered: May 2005

Junior Member

I tried what you had said and failed again...

Below is my sqlnet.ora file:
# sqlnet.ora Network Configuration File: C:\Oracle\product\10.1.0\Client_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.

# SQLNET.AUTHENTICATION_SERVICES= (NTS)

# NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

Attached, is the output from the tnsping command:
/forum/fa/125/0/

This is so frustrating.... Amazing how I can't even establish a simple connection with ORACLE.

Do you have any other suggestions?

Attachment: tnsping2 response.JPG
(Size: 149.82KB, Downloaded 10993 times)

Report message to a moderator

Re: ora-12541 error [message #118747 is a reply to message #118663]

Sat, 07 May 2005 15:05

girish.rohini
Messages: 744
Registered: April 2005
Location: Delhi (India)

Senior Member

As per last screen shot the listener hasn't got refreshed.

First stop the listener.

lsnrctl stop

& then start it again

lsnrctl start.

After this do try out.

Report message to a moderator

Re: ora-12541 error [message #118932 is a reply to message #118747]

Mon, 09 May 2005 14:50

wsyeager
Messages: 8
Registered: May 2005

Junior Member

It still didn't work....

The following 3 responses is the output of the commands. I had to separate each one in a separate response since I'm only allowed 1 attachment per message:

I tried the tnssteop command with the attached output:
/forum/fa/137/0/

Attachment: tnsstop.JPG
(Size: 196.79KB, Downloaded 10694 times)

Report message to a moderator

Re: ora-12541 error [message #118933 is a reply to message #118932]

Mon, 09 May 2005 14:56

wsyeager
Messages: 8
Registered: May 2005

Junior Member

I tried the tnsstart command with the attached output:
/forum/fa/138/0/

Attachment: tnsstart.JPG
(Size: 203.04KB, Downloaded 10638 times)

Report message to a moderator

Re: ora-12541 error [message #118934 is a reply to message #118933]

Mon, 09 May 2005 15:06

wsyeager
Messages: 8
Registered: May 2005

Junior Member

I tried the tnsping command with the attached output:
/forum/fa/139/0/

Attachment: tnsping.JPG
(Size: 200.87KB, Downloaded 11018 times)

Report message to a moderator

Re: ora-12541 error [message #119187 is a reply to message #118934]

Wed, 11 May 2005 01:48

girish.rohini
Messages: 744
Registered: April 2005
Location: Delhi (India)

Senior Member

HI

Uncomment the follwing line in sqlnet.ora:

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

& then try after refreshing the listener.
This time it shd work.

Regds
Girish

Report message to a moderator

Re: ora-12541 error [message #119188 is a reply to message #119187]

Wed, 11 May 2005 01:52

girish.rohini
Messages: 744
Registered: April 2005
Location: Delhi (India)

Senior Member

Also add the following entry in tnsnames.ora

ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = DBTYZQ41)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)

Report message to a moderator

Re: ora-12541 error [message #119308 is a reply to message #119188]

Wed, 11 May 2005 13:15

wsyeager
Messages: 8
Registered: May 2005

Junior Member

Thanks a million!!! That worked great!

There obviously must be a problem with the ORACLE Installer when setting up the db.

Report message to a moderator

Previous Topic:	Question about Oracle10g Net Services'IPv6 Support
Next Topic:	TNS file on network

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Mon May 13 04:32:49 CDT 2024