I have an Oracle database with a server IP of 22.214.171.124, and it also has a virtual IP of 10.10.10.10. The virtual IP is the way some of my clients must hit the database with the use of tnsnames.ora(host=10.10.10.10) instead of the actual IP address. Those clients are receiving 12502 errors and the listener log is showing these errors also. Is there anything special I need to do?
Here's what the Error Messages guide says about the TNS-12502 error:
TNS-12502 TNS:listener received no CONNECT_DATA from client
Cause: No CONNECT_DATA was passed to the listener.
Action: Check that the service name resolved from TNSNAMES.ORA has the CONNECT_DATA component of the connect descriptor.
So, the first step is to check your TNSNAMES.ORA file that the clients are using and verify that it looks something like this:
ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.10.10)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = ORCL) ) )It sounds like you're missing some information.
For More Information
- Dozens more answers to tough Oracle questions from Karen Morton are available.
- The Best Oracle Web Links: tips, tutorials, scripts, and more.
- Have an Oracle or SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
- Ask your technical Oracle and SQL questions -- or help out your peers by answering them -- in our live discussion forums.
- Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.
Dig deeper on Oracle error messages
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.