Resolving the “ORA-12514: No TNS Listener” error with Oracle XE

Posted on May 14, 2009 by Nikunj Sanghvi

I faced this particularly nagging error with a personal install of Oracle XE (Oracle Database 10g Express Edition) on my Windows XP laptop:

ORA-12514:No TNS Listener

The SQL Command prompt that came with Oracle XE would work but none of the other tools like Toad, SQL Plus or even the Oracle XE Database Homepage which would open in a browser window would work.

The final resolution after a lot of research seemed to be painfully simple:

  1. Run the LSNRCTL.EXE program from the BIN directory of your Oracle XE install (default: C:oraclexeapporacleproduct10.2.0serverBIN). You should even be able to run it from any command prompt since the BIN directory is generally added to your PATH environment variable by default.
  2. At the LSNRCTL> command prompt, issue the STOP command. It should say:Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
    The command completed successfully
  3. Now, at the LSNRCTL> prompt, issue the START command. It should return:Starting tnslsnr: please wait…

    TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 – Production
    System parameter file is C:oraclexeapporacleproduct10.2.0serverNETWORKAD
    MINlistener.ora
    Log messages written to C:oraclexeapporacleproduct10.2.0servernetworklog
    listener.log
    Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\.pipeEXTPROC_FOR
    _XEipc)))
    Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=port)))

    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
    STATUS of the LISTENER
    ————————
    Alias                     LISTENER
    Version                   TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 – Produ
    ction
    Start Date                14-MAY-2009 01:24:49
    Uptime                    0 days 0 hr. 0 min. 5 sec
    Trace Level               off
    Security                  ON: Local OS Authentication
    SNMP                      OFF
    Default Service           XE
    Listener Parameter File   C:oraclexeapporacleproduct10.2.0serverNETWORKADMINlistener.ora
    Listener Log File         C:oraclexeapporacleproduct10.2.0servernetworkloglistener.log
    Listening Endpoints Summary…
    (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\.pipeEXTPROC_FOR_XEipc)))
    (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hostname)(PORT=port)))
    Services Summary…
    Service “CLRExtProc” has 1 instance(s).
    Instance “CLRExtProc”, status UNKNOWN, has 1 handler(s) for this service…
    Service “PLSExtProc” has 1 instance(s).
    Instance “PLSExtProc”, status UNKNOWN, has 1 handler(s) for this service…
    The command completed successfully

That’s it! That should resolve the problem. Verify by running “tnsping XE” or “tnsping dbname” at the command prompt. It should return OK.

All your tools like Toad, SQL Plus or Oracle SQL Developer should be able to connect to the database now!


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  • CulipGendut

    can anybody help me..
    i try to make a web app for my tesis, i am using yii framework with oraclexe database, but when i’ll make a model, there is some error like this:
    exception ‘CDbException’ with message ‘CDbConnection failed to open the DB connection: SQLSTATE[HY00
    0]: pdo_oci_handle_factory: ORA-12514: TNS:listener does not currently know of service requested in
    connect descriptor
    (extpdo_ocioci_driver.c:581)’ in C:Program FilesZendApache2htdocsyiiframeworkdbCDbConnect
    ion.php:241
    Stack trace:
    #0 C:Program FilesZendApache2htdocsyiiframeworkdbCDbConnection.php(217): CDbConnection->open
    ()
    #1 C:Program FilesZendApache2htdocsyiiframeworkdbCDbConnection.php(196): CDbConnection->setA
    ctive(true)
    #2 C:Program FilesZendApache2htdocsyiiframeworkbaseCModule.php(351): CDbConnection->init()
    #3 C:Program FilesZendApache2htdocsyiiframeworkbaseCApplication.php(338): CModule->getCompon
    ent(‘db’)
    #4 C:Program FilesZendApache2htdocsyiiframeworkclicommandsshellModelCommand.php(115): CApp
    lication->getDb()
    #5 [internal function]: ModelCommand->generateModel(‘C:Program File…’, Array)
    #6 C:Program FilesZendApache2htdocsyiiframeworkconsoleCConsoleCommand.php(116): call_user_fu
    nc(Array, ‘C:Program File…’, Array)
    #7 C:Program FilesZendApache2htdocsyiiframeworkclicommandsshellModelCommand.php(94): CCons
    oleCommand->copyFiles(Array)
    #8 C:Program FilesZendApache2htdocsyiiframeworkclicommandsShellCommand.php(136): ModelComma
    nd->run(Array)
    #9 C:Program FilesZendApache2htdocsyiiframeworkclicommandsShellCommand.php(96): ShellComman
    d->runShell()
    #10 C:Program FilesZendApache2htdocsyiiframeworkconsoleCConsoleCommandRunner.php(62): ShellC
    ommand->run(Array)
    #11 C:Program FilesZendApache2htdocsyiiframeworkconsoleCConsoleApplication.php(88): CConsole
    CommandRunner->run(Array)
    #12 C:Program FilesZendApache2htdocsyiiframeworkbaseCApplication.php(133): CConsoleApplicati
    on->processRequest()
    #13 C:Program FilesZendApache2htdocsyiiframeworkyiic.php(30): CApplication->run()
    #14 C:Program FilesZendApache2htdocsyiiframeworkyiic(15): require_once(‘C:Program File…’)

    can someone help me please…

  • http://f1fe.com/blog/2009/08/07/links-for-2009-08-07/ links for 2009-08-07 | .:: a few thoughts on the subject by rob wright ::.

    [...] Resolving the “ORA-12514: No TNS Listener” error with Oracle XE « exertia (tags: oracle oraclexe) August 07th 2009 Posted to Links [...]

  • vamshi

    Call your DBA and get the latest TNS Entry file.

  • sergio

    Write this line in the listener.ora file:
    SID_LIST_LISTENER =
    …
    (SID_DESC =
    (SID_NAME = XE)
    (ORACLE_HOME = C:oraclexeapporacleproduct10.2.0server)
    )
    …