10.1 to 10.2 upgrade: enterprise manager not working

Question

Hello,
We recently upgraded from Oracle 10.1 to 10.2: this meant installing 10.2 in a new home directory and upgrading the database instances from 10.1 to 10.2 through the database upgrade assistant. So right now, both 10.1 and 10.2 reside on the server but in seperate folders. Though all the database instances (we have 2-3 databases on same server) have been upgraded to 10.2, I am not sure if it is safe to uninstall 10.1 database server and so I have left it as such.
Initially it did not seem like a problem since enterprise manager opened fine for 10.2 DB instances and I could also connect to the database through my GIS client/program (its spatial data). Now, we are not sure what went wrong today but I am getting this error when i try to open the enterprise manager(web).
Can someone throw some light on what could be happening? There seem to be 2 listener services running in windows services - could this be a problem? (though I have stopped listener of 10.1 and it does not help); also could ports be an issue. The listener in 10.1 says it users 1521 and in 10.2, it says 1522 by default.
Any advice would be helpful.
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Database Instance: Livingston
Enterprise Manager is not able to connect to the database instance. The state of the components are listed below. Page Refreshed Sep 12, 2006 7:09:25 PM
Database Instance
Host cadgis-jackson.lsu.edu
Port 1522
SID Livingston
Oracle Home C:\oracle\product\10.2.0\db_2
Listener
Status Up
Host cadgis-jackson.lsu.edu
Port 1522
Name LISTENER
Oracle Home C:\oracle\product\10.2.0\db_2
Location C:\oracle\product\10.2.0\db_2\network\admin
Agent Connection to Instance
Status Failed
Details ORA-12505: TNS:listener does not currently know of SID given in connect descriptor (DBD ERROR: OCIServerAttach)

Answer 1

I would suggest you to do the folowing.
There isn't any harm in uninstalling 10.1, so go for it, stop all services running from this home (10.1). As you have upgraded your all DBs to now 10.2. softare is running your databases.
After un-installation, you will not see your listener as well, now create a new listener from 10.2 which will be running on the default port 1521 and then use sqlplus from client side to check whether listener is running fine or not.
Next step is to re configure your enterprise manager, use following procedure
1. Open a terminal window and execute the following command to stop dbconsole:
emctl stop dbconsole
2. To recreate the Enterprise Manager repository, enter the following command:
emca -repos recreate
Provide parameters for the repository re-creation. Enter at the appropriate prompt:
Database SID: orcl
Listener port number: 1521
Password for SYS user: oracle <the password does not appear >
Password for SYSMAN user: oracle <the password does not appear >
Do you wish to continue? [yes(Y)/no(N)]: y
Then wait. The re-creation of the Enterprise Manager repository may take about 15 minutes depending on your system setup.
3. To deconfigure dbcontrol, enter the following command:
emca -deconfig dbcontrol db
Enter the following values when prompted:
Database SID: orcl
Do you wish to continue? [yes(Y)/no(N)]: y
The deconfiguration is generally faster than the repository re-creation. The actual time depends on your system setup.
4. To reconfigure dbcontrol, enter the following command:
emca -config dbcontrol db
Provide parameters for the reconfiguration. Enter the following values when prompted:
Database SID: orcl
Listener port number: 1521
Password for SYS user: oracle <the password does not appear >
Password for DBSNMP user: oracle <the password does not appear >
Password for SYSMAN user: oracle <the password does not appear >
Enter nothing for the next questions (just press the Enter key):
Email address for notifications (optional):
Outgoing Mail (SMTP) server for notifications (optional):
Do you wish to continue? [yes(Y)/no(N)]: y
The actual time for the reconfiguration depends on your system setup.
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