9i and 10g Installation

Question

Have oracle 9ir2 installed first and I then installed 10g, but 10g DB can't start. Installation was succeessful. When I try to open the database I get the following errors
Listener refused the connection with the following error: ORA-12500, TNS:listener failed to start a dedicated server process The Connection descriptor used by the client was: (DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=chiana.kymp.net)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=chiana)))
Can someone tell me how to workaround this problem.

Answer 1

Did the 10g database register with the listener? The fact that the error message says that no handler was found indicates to me that the client was able to connect to the listener. It might be that the listener is running but that the database can't register with it.
See what services are running by running:
lsnrctl service
I expect that you will see that the 9i database has registered a handler, but that your 10g service either will not be there or there will not be a handler for it.
It might be that you need to run the 10g version of the listener. I would expect it to be backward compatible with the 9i database. I think you are running a 9i listener and 10g db doesn't play nice with it -- I don't know that though.
You could either make 10g your default listener, or set it up to run on a different port. But then you have the additional work of doing that and pointing the instances to it and such.
Chris