********************************************************************************************************

[oracle@dbs ~]$ emctl status dbconsole
TZ set to PRC
OC4J Configuration issue. /home/oracle/product/10.2.0/db/oc4j/j2ee/OC4J_DBConsole_dbs_racdb2 not found.
[oracle@dbs ~]$ cd /home/oracle/product/10.2.0/db/oc4j/j2ee/
[oracle@dbs j2ee]$ ls
deploy_db.ini  isqlplus      isqlplus_dbs       OC4J_DBConsole             OC4J_DBConsole_dbs_racdb1
home           isqlplus_dbp  oc4j_applications  OC4J_DBConsole_dbp_racdb2

[oracle@dbs j2ee]$ emca -deconfig dbcontrol db -repos drop -cluster
STARTED EMCA at Nov 25, 2010 9:08:38 AM
EM Configuration Assistant, Version 10.2.0.1.0 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.
Enter the following information:
Database unique name: racdb
Listener port number: 1521
Password for SYS user: 
Password for SYSMAN user: 
Password for SYSMAN user: 
Do you wish to continue? [yes(Y)/no(N)]: y
Nov 25, 2010 9:08:59 AM oracle.sysman.emcp.EMConfig perform
INFO: This operation is being logged at /home/oracle/product/10.2.0/db/cfgtoollogs/emca/racdb/emca_2010-11-25_09-08-38-AM.log.
Nov 25, 2010 9:09:02 AM oracle.sysman.emcp.util.DBControlUtil stopOMS
INFO: Stopping Database Control (this may take a while) ...
Nov 25, 2010 9:09:18 AM oracle.sysman.emcp.EMReposConfig stopDBMSJobs
WARNING: Error initializing SQL connection. SQL operations cannot be performed
Nov 25, 2010 9:09:18 AM oracle.sysman.emcp.EMReposConfig invoke
WARNING: Unable to remove DBMS jobs.
Nov 25, 2010 9:09:18 AM oracle.sysman.emcp.EMReposConfig dropRepository
INFO: Dropping the EM repository (this may take a while) ...
Nov 25, 2010 9:15:04 AM oracle.sysman.emcp.EMReposConfig invoke
INFO: Repository successfully dropped
Enterprise Manager configuration completed successfully
FINISHED EMCA at Nov 25, 2010 9:15:06 AM

************************************************************************************

[oracle@dbs j2ee]$ emca -config dbcontrol db -repos create -cluster

STARTED EMCA at Nov 25, 2010 9:16:58 AM
EM Configuration Assistant, Version 10.2.0.1.0 Production
Copyright (c) 2003, 2005, Oracle.  All rights reserved.

Enter the following information:
Database unique name: racdb
Listener port number: 1521
Cluster name: racdb
Password for SYS user: 
Password for DBSNMP user: 
Password for SYSMAN user: 
Password for SYSMAN user: Email address for notifications (optional):
Outgoing Mail (SMTP) server for notifications (optional):
ASM ORACLE_HOME [ /home/oracle/product/10.2.0/db ]:
ASM port [ 1521 ]:
ASM user role [ SYSDBA ]:
ASM username [ SYS ]:
ASM user password: 
-----------------------------------------------------------------

You have specified the following settings

Database ORACLE_HOME ................ /home/oracle/product/10.2.0/db

Database instance hostname ................ dbs
Listener port number ................ 1521
Cluster name ................ racdb
Database unique name ................ racdb
Email address for notifications ...............
Outgoing Mail (SMTP) server for notifications ...............
ASM ORACLE_HOME ................ /home/oracle/product/10.2.0/db
ASM port ................ 1521
ASM user role ................ SYSDBA
ASM username ................ SYS

-----------------------------------------------------------------
Do you wish to continue? [yes(Y)/no(N)]: y