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error ORA-12154 [message #553415]

Fri, 04 May 2012 06:24

sasikalak
Messages: 3
Registered: May 2012

Junior Member

when i am trying to connect the few databases which exists in the tnsname.ora file it throws the error - 12154(Could not resolve the connect identifier specified(name of database)

How can i resolve this error..

in tnsnames.ora i am providing the details for service name = (DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(
(PROTOCOL = TCP)
(Host = )
(Port = 1530)
)
)
(CONNECT_DATA =
(SID = name)
)
)

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Re: error ORA-12154 [message #553416 is a reply to message #553415]

Fri, 04 May 2012 06:26

ThomasG
Messages: 3212
Registered: April 2005
Location: Heilbronn, Germany

Senior Member

Provide the correct details for the service. (what is the host for example)

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Re: error ORA-12154 [message #553418 is a reply to message #553416]

Fri, 04 May 2012 06:46

muralikri
Messages: 638
Registered: August 2011
Location: chennai

Senior Member

Change databasename and service name ,ip address

<databasname> =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.106.20.12)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = <databasname>)
    )
  )

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Re: error ORA-12154 [message #553421 is a reply to message #553418]

Fri, 04 May 2012 06:54

sasikalak
Messages: 3
Registered: May 2012

Junior Member

even tried with that..it does not work..

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Re: error ORA-12154 [message #553422 is a reply to message #553416]

Fri, 04 May 2012 06:55

sasikalak
Messages: 3
Registered: May 2012

Junior Member

for example host is rdrzd3053.companyname.com

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Re: error ORA-12154 [message #553423 is a reply to message #553422]

Fri, 04 May 2012 06:57

muralikri
Messages: 638
Registered: August 2011
Location: chennai

Senior Member

Did you verified the database exists or not?

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Re: error ORA-12154 [message #553430 is a reply to message #553415]

Fri, 04 May 2012 08:01

Michel Cadot
Messages: 68729
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

ORA-12154: TNS:could not resolve the connect identifier specified
 *Cause:  A connection to a database or other service was requested using
 a connect identifier, and the connect identifier specified could not
 be resolved into a connect descriptor using one of the naming methods
 configured. For example, if the type of connect identifier used was a
 net service name then the net service name could not be found in a
 naming method repository, or the repository could not be
 located or reached.
 *Action:
   - If you are using local naming (TNSNAMES.ORA file):
      - Make sure that "TNSNAMES" is listed as one of the values of the
        NAMES.DIRECTORY_PATH parameter in the Oracle Net profile
        (SQLNET.ORA)
      - Verify that a TNSNAMES.ORA file exists and is in the proper
        directory and is accessible.
      - Check that the net service name used as the connect identifier
        exists in the TNSNAMES.ORA file.
      - Make sure there are no syntax errors anywhere in the TNSNAMES.ORA
        file.  Look for unmatched parentheses or stray characters. Errors
        in a TNSNAMES.ORA file may make it unusable.
   - If you are using directory naming:
      - Verify that "LDAP" is listed as one of the values of the
        NAMES.DIRETORY_PATH parameter in the Oracle Net profile
        (SQLNET.ORA).
      - Verify that the LDAP directory server is up and that it is
        accessible.
      - Verify that the net service name or database name used as the
        connect identifier is configured in the directory.
      - Verify that the default context being used is correct by
        specifying a fully qualified net service name or a full LDAP DN
        as the connect identifier
   - If you are using easy connect naming:
      - Verify that "EZCONNECT" is listed as one of the values of the
        NAMES.DIRETORY_PATH parameter in the Oracle Net profile
        (SQLNET.ORA).
      - Make sure the host, port and service name specified
        are correct.
      - Try enclosing the connect identifier in quote marks.

   See the Oracle Net Services Administrators Guide or the Oracle
   operating system specific guide for more information on naming.

Regards
Michel

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Re: error ORA-12154 [message #553431 is a reply to message #553430]

Fri, 04 May 2012 08:09

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

ORA-12154 ALWAYS only occurs on SQL Client & no SQL*Net packets ever leave client system
ORA-12154 *NEVER* involves the listener, the database itself or anything on the DB Server.
ORA-12154 occurs when client requests a connection to some DB server system using some connection string.
The lookup operation fails because the name provided can NOT be resolved to any remote DB.
The analogous operation would be when you wanted to call somebody, but could not find their name in any phonebook.
The most frequent cause for the ORA-12154 error is when the connection alias can not be found in tnsnames.ora.
The lookup operation of the alias can be impacted by the contents of the sqlnet.ora file; specifically DOMAIN entry.
TROUBLESHOOTING GUIDE: ORA-12154 & TNS-12154 TNS:could not resolve service name [ID 114085.1]
http://edstevensdba.wordpress.com/2011/02/26/ora-12154tns-03505/

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