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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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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
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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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Points refunded and moved to PAQ

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