[Amit BansalKeymaster]

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.

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Fatal NI connect error 12533, connecting to:

(DESCRIPTION=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rss-db205-vip.mtnk)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=RSSDB)(INSTANCE_NAME=RSSDB1)(CID=(PROGRAM=oracle)(HOST=rss-db205.mtnk)(USER=oracle))))

VERSION INFORMATION:

TNS for Linux: Version 11.2.0.1.0 – 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

[suvvParticipant]

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

SQLPLUS SCOTT/[email protected]

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.

Thanks

Suvv

[Amit BansalKeymaster]

Mic,

Why are there two entries for Description in tns entry

<br />
(DESCRIPTION=(DESCRIPTION=<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>

-Amit

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