DROP and Recreate EM repository

Stop dbconsole, if running and the following process

ps -ef | grep console;                                            

ps -ef| grep emwd;

ps -ef | grep emagent;

ps -ef |grep java;

Logon SQLPLUS as sysdba or sys and execute below

drop user sysman cascade;

drop role MGMT_USER;

drop user MGMT_VIEW cascade;

drop public synonym MGMT_TARGET_BLACKOUTS;

drop public synonym SETEMVIEWUSERCONTEXT; 

drop public synonym MGMT_target_blackouts;                   

drop public synonym mgmt_severity_array;

drop public synonym mgmt_guid_obj;  

Verify any leftover object owned by SYSMAN

SELECT owner,TABLE_NAME, synonym_name name FROM dba_synonyms WHERE table_owner = 'SYSMAN';

if you notice any public synonym or any rows returned by the above query .

DECLARE

CURSOR c1 IS

SELECT owner, synonym_name name

FROM dba_synonyms

WHERE table_owner = 'SYSMAN';

BEGIN

FOR r1 IN c1 LOOP

IF r1.owner = 'PUBLIC' THEN

EXECUTE IMMEDIATE 'DROP PUBLIC SYNONYM '||r1.name;

ELSE

EXECUTE IMMEDIATE 'DROP SYNONYM '||r1.owner||'.'||r1.name;      

END IF;

END LOOP;

END;

/

emca -deconfig dbcontrol db -repos drop

emca -config dbcontrol db -repos create