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ORA-12545: TNS: name lookup failure (Oracle 8.1.6)

Posted on 2001-07-04
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Last Modified: 2012-05-04
Connecting to an Oracle 8.1.6 database on HP-UX server.
I am able to tnsping the ORACLE_SID from the NT server MS-DOS command prompt. However, when I try to connect using e.g. SQL*Plus 3.3 I get the following error and cannot proceed:

ORA-12545: TNS: name lookup failure

The entry in the c:\orant\network\admin\tnsnames.ora file looks fine.

Can anyone help?

Thanks
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Question by:Butzi
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11 Comments
 
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Expert Comment

by:forquestion
ID: 6253623
Check your SQLNet.ora, If there are lines like :

NAMES.DEFAULT_DOMAIN = yourdomain
SQLNET.AUTHENTICATION_SERVICES= (NTS)

Then it needs to lookup dns server


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Author Comment

by:Butzi
ID: 6254826
Thank you for your comment. This is a fresh 8.1.6 installation. The SQLNet.ora file is not being used.
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Expert Comment

by:forquestion
ID: 6255395
How about the listener.ora. Can you show both listner.ora in HP and tnsnames.ora in NT to here? If there is any SQLNET.ora in NT, please post to here too.



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Expert Comment

by:danhw
ID: 6255403
Depending on the version of SQLPLUS and the tools, some use NET8, some use SQLNET, to talk to the the DB. The NET8 is newer. NET8 looks in c:\orant\net80\admin; while sqlnet looks in c:\orant\network\admin. Check that the same TNSNAMES.ORA file is in BOTH directories, with the desired alias.

Do you have a registry setting for TNS_ADMIN? If so, that directory is where it will look for a TNSNAME.ORA file.

The other thing I just found out had to do with multiple Oracle Homes. Are you using multiple Oracle Homes?
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Author Comment

by:Butzi
ID: 6256139
tnsnames.ora amended in both Net8 & SQLNet admin folders:

Beq-local.world =
  (DESCRIPTION =
    (ADDRESS_LIST =
        (ADDRESS =
          (COMMUNITY = beq.world)
          (PROTOCOL = BEQ)
          (PROGRAM = oracle73)
          (ARGV0 = oracle73ORCL)
          (ARGS = '(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))')
        )
    )
    (CONNECT_DATA = (SID = ORCL)
    )
  )
CDEV.world =
  (DESCRIPTION =
    (ADDRESS_LIST =
        (ADDRESS =
          (COMMUNITY = tcp.world)
          (PROTOCOL = TCP)
          (Host = 20.44.147.100)
          (Port = 1521)
        )
    )
    (CONNECT_DATA = (SID = CDEV)
    )
  )

listener ora file on HP-UX server:

LISTENER =
 (ADDRESS_LIST=3%)
   (ADDRESS=(PROTOCOL=tcp)
            (HOST=localhost)
            (PORT=1521)
   )
  )

SID_LIST_LISTENER=
   (SID_LIST=
      (SID_DESC=
          (GLOBAL_DBNAME=CDEV.world)
          (SID_NAME=CDEV)
          (ORACLE_HOME=/u01/app/oracle/product/8.1.6)
         (PRESPAWN_MAX=20)
          (PRESPAWN_LIST=
           (PRESPAWN_DESC=(PROTOCOL=tcp)(POOL_SIZE=2)(TIMEOUT=1))
         )
        )
       )

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Expert Comment

by:forquestion
ID: 6257091
It looks like both tnsnames.ora and listener.ora are copied from Oracle7 or Oracle8. Some parameter are obsoluted.

Please check the localhost IP. Usually localhost is using 127.0.0.1.

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Expert Comment

by:sunsapollos
ID: 6268358

  Check your localhost address: host localhost or get it from /etc/hosts.
  change localhost to IP address(not 127.0.0.1).
  I suggest you reconfig listener.ora and tnsnames.ora.
On server:run netassist to config listener.ora.on client
select net8 assist menu to config tnsnames.ora.if client is sql*net,select net easy config menu
 
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Expert Comment

by:leolkk
ID: 6330315
Butzi,
your question is resolved?
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Expert Comment

by:Mindphaser
ID: 7038060
Please update and finalize this old, open question. Please:

1) Award points ... if you need Moderator assistance to split points, comment here with details please or advise us in Community Support with a zero point question and this question link.
2) Ask us to delete it if it has no value to you or others
3) Ask for a refund so that we can move it to our PAQ at zero points if it did not help you but may help others.

EXPERT INPUT WITH CLOSING RECOMMENDATIONS IS APPRECIATED IF ASKER DOES NOT RESPOND.

Thanks,

** Mindphaser - Community Support Moderator **

P.S.  Click your Member Profile, choose View Question History to go through all your open and locked questions to update them.
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Expert Comment

by:DanRollins
ID: 7052762
Lacking timely response from Butzi or contributing experts, but seeing that there is some useful info here, I recommend:
    Refund points and save as a 0-pt PAQ.

DanRollins -- EE database cleanup volunteer
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LVL 6

Accepted Solution

by:
Mindphaser earned 0 total points
ID: 7052823
Points refunded and moved to PAQ

** Mindphaser - Community Support Moderator **
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