ORA-02800: Requests timed out from Oracle Scheduler Job

Get errors from running an Oracle scheduler job:

SQL> exec dbms_scheduler.run_job(job_name=>'BATCH_JOB', 
BEGIN dbms_scheduler.run_job(job_name=>'BATCH_JOB', 
                                 use_current_session=>false); END;

ERROR at line 1:
ORA-02800: Requests timed out
ORA-06512: at "SYS.DBMS_ISCHED", line 196
ORA-06512: at "SYS.DBMS_SCHEDULER", line 486
ORA-06512: at line 1


1)check parameter to make sure not zero.

SQL> show parameter job_queue_processes

NAME                                 TYPE     VALUE
-------------------------------- ------------ ------------------
job_queue_processes                integer    100

2) Bounce the database due to the bugs.

3) Rerun the job successfully.

SQL> exec dbms_scheduler.run_job(job_name=>'BATCH_JOB', 

PL/SQL procedure successfully completed.

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