To fix this issue
On the DB tier
ALTER SESSION SET CONTAINER=emdev13;
alter system set job_queue_processes=0;
On the OMS tier
SQL> show user
USER is "SYSMAN"
SQL> exec emd_maintenance.remove_em_dbms_jobs;
PL/SQL procedure successfully completed.
SQL> exec gc_interval_partition_mgr.partition_maintenance;
PL/SQL procedure successfully completed.
SQL> @?/sysman/admin/emdrep/sql/core/latest/admin/admin_recompile_invalid.sql SYSMAN
. . .
On the DB tier
ALTER SESSION SET CONTAINER=emdev13;
ALTER SESSION SET CONTAINER=emdev13;
alter system set job_queue_processes=1000;
On the OMS tier
SQL> exec emd_maintenance.submit_em_dbms_jobs;
PL/SQL procedure successfully completed.
SQL>