ora 20001 error in oracle dbms scheduler i have written a test job like 

begin
DBMS_SCHEDULER.CREATE_JOB
(
job_name =&gt; 'test_job'
,job_type =&gt;'plsql_block'
,job_action =&gt; 'null'
,enabled =&gt; true
);
end;
/


after a while when the check the status

select * from user_scheduler_job_run_details where job_name='TEST_JOB';


the status is failed ,i see these two lines 

ORA-20001: You are not allowed to logon from this terminal!!!
ORA-06512: at line 39

how can i resolve this error.
and 
how to find the job id of a scheduled job(created using dbms_scheduler)
Your question contain 2 items that must have been looked at before question itself arose:


Have you looked at API of DBMS_SCHEDULER (any programmer should do that before knowing how to use built-in [package]) ; another words have you RTFM?
Oracle (most of the time) is in-fact very good with "responses" - error signaling back to "client". Have you googled ora - 20001 ?


To your question:


Your job action is NULL; you need to have some procedure that does something AND also is not named as Oracle keyword or PLSQl block that must have at bare minimum begin and end
- docs
Oracle error 20001 is custom error and if you want to see the code you need to contact DBA's.
Based on the message , seems that your schema also missing some grants (you obviously logged in to the database , so message itself is deceiving , but the exact error can only be identified by going thru the code or checking with DBA's directly - see above )
why do you need job id? your job name is providing your with information already! check API's!!