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12154 with Perl Oracle DBD and instant client [message #385904] Wed, 11 February 2009 17:15 Go to next message
kwiqsilver
Messages: 1
Registered: February 2009
Junior Member
I'm trying to connect to a remote oracle DB with a Perl script using DBI and the Oracle instant client and I get the 12154 error. I do not have a tnsnames or other configuration type file. Here's the relevant code:
$ENV{LD_LIBRARY_PATH} = "$ENV{LD_LIBRARY_PATH}://usr/lib/oracle/11.1/client64/lib/";
$ENV{ORACLE_HOME} = "/usr/lib/oracle/11.1";

my $dbh = DBI->connect("dbi:Oracle:$dbName\@$dbHost:$dbPort", $dbUser, $dbPass) or
          die("DB Error '$DBI::errstr");

Output:
DBI connect('dbName@host:1521','user',...) failed: ORA-12154: TNS:could not resolve the connect identifier specified (DBD ERROR: OCIServerAttach) at ./cgi-bin/assigned.pl line 28
DB Error 'ORA-12154: TNS:could not resolve the connect identifier specified (DBD ERROR: OCIServerAttach) at ./cgi-bin/assigned.pl line 28.


A coworker is using the same connection values to connect via Python. I can telnet to the box on port 1521 (I don't know of any oracle commands I can run to verify that it is oracle that is listening on the port).


Client:
OS: RedHat Linux Enterprise 4.3
Oracle: InstantClient 11.1.0.7 basic and devel
Perl: 5.10
DBD::Oracle: 1.22

Server:
Unknown clearquest machine.
Re: 12154 with Perl Oracle DBD and instant client [message #385930 is a reply to message #385904] Wed, 11 February 2009 23:24 Go to previous message
Michel Cadot
Messages: 64151
Registered: March 2007
Location: Nanterre, France, http://...
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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