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ora-12154 please help me [message #169347] Wed, 26 April 2006 06:19 Go to next message
mathewcos
Messages: 3
Registered: April 2006
Location: Kerala
Junior Member
Friends,

I am getting ora-12154 error when connecting from client mechine(Windows 2000 professional) to DB server(Windows XP mechine).

I am trying to connect like this from client machine

C:> sqlplus u2/u2@tomat

Then error is comming

======================
I can able to connect from Server like this
C:> sqlplus u2/u2@tomat
=========================

My listener configuration

LISTENER =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = d-166)(PORT = 1521))
)

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = MAT)
(ORACLE_HOME = C:\oracle\ora92)
(SID_NAME = mat)
)
)


My Service name conf in tnsnames.ora in client side

TOMAT =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = D-166)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = MAT)
)
)

What will be the problem? Plz help me

regards
Mathew

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Re: ora-12154 please help me [message #169373 is a reply to message #169347] Wed, 26 April 2006 08:46 Go to previous messageGo to next message
BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal
Senior Member
12154, 00000, "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.

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Re: ora-12154 please help me [message #169416 is a reply to message #169373] Wed, 26 April 2006 13:24 Go to previous message
andrew again
Messages: 2577
Registered: March 2000
Senior Member
From your client machine, try:
c:\> ping d-166

c:\> tnsping tomcat
c:\> tnsping tomcat.world (or whatever your default domain is in sqlnet.ora)

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