tns issue / sqlnet issue

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    • #1931
      Amit Bansal

      In 11gR2 RAC, the alert log keeps showing the below errors, the ticket has opened to Oracle support for 1 week. No any progress.

      Thanks in advance.

      Fatal NI connect error 12533, connecting to:



      TNS for Linux: Version – Production

      Time: 09-AUG-2010 18:55:19

      Tracing not turned on.

      Tns error struct:

      ns main err code: 12533

      TNS-12533: TNS:illegal ADDRESS parameters

      ns secondary err code: 12560

      nt main err code: 503

      TNS-00503: Illegal ADDRESS parameters

      nt secondary err code: 0

      nt OS err code: 0

    • #2115

      Hello Mic,

      The TNS-12533 error usually occurs when the protocol specific parameters in

      the ADDRESS section of the designated connect descriptor in the TNSNAMES.ORA

      are incorrect.Verify if the entries are correct with a simple connect string


      If there is no issue for tns entries ,The next thing in a RAC configuration i will verify is the LOCAL_LISTENER and REMOTE_LISTENER settings.I have seen issues where this error is reported for incorrect LOCAL_LISTENER and REMOTE_LISTENER settings.



    • #2116
      Amit Bansal


      Why are there two entries for Description in tns entry

      <br />

      You have mentioned that this entries are mentioned in alert log. Have you checked the client from which it is coming. Also as Suvv sugested try checking local_listener and remote_listener value. Note that if you are using scan (11gr2), remote_listener should be scanname:<port>


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