Sometimes in EM Dbconsole 10.2 you try to create a new job and you get the follwoing error:
ORA-20401: A job with the specified name already exists ORA-06512: at "SYSMAN.MGMT_JOBS
First thing is to check the Job and Job library EM screens to check if the job appears there. If so check the status and try to delete from there.
If you cannot change the status please follow :
Stop dbconsole job hung in status Stop Pending on this blog to change the status to stopped.
The if you want to delete it , and you are sure there is other instance of the job scheduled execute :
select job_id, job_name, job_owner from mgmt_job where job_name like '%[JOB_NAME]%';
Oracle Metalink Note ID 430626.1
Vijay R. Dumpa Oracle Blog