Job for refreshing materialized view will be failed by manually is ok

Question

Hello to all
I have created a read only materialized view and i have created a
stored procedure tha calls DBMS_MVIEW.REFRESH for refreshing the
materialized view by this script
CREATE MATERIALIZED VIEW "REZA"."T1_MV2"
REFRESH FAST WITH PRIMARY KEY
AS SELECT "T1"."ID" "ID","T1"."NAME" "NAME" FROM "REZA"."T1"@TEHRAN.COM "T1";
create or replace procedure refresh_mv
as
begin
DBMS_MVIEW.REFRESH (list=>'reza.t1_mv2',push_deferred_rpc=>false,method=>'f');
end;
and i have created a job for calling refresh_mv frequently by this script
DBMS_SCHEDULER.CREATE_JOB (
job_name => 'MV_JOB',
job_type => 'STORED_PROCEDURE',
job_action => 'reza.refresh_mv',
start_date => SYSTIMESTAMP,
repeat_interval => 'FREQ=SECONDLY;INTERVAL=90',
end_date => null
when i run this job by DBMS_SCHEDULER.RUN_JOB all thing is right and the materialized view will be update
and STATUS filed in ALL_SCHEDULER_JOB_LOG is SUCCEEDED for that execution
and it's completion duration is very short (+000000000 00:00:00.141000)
but when the job execute in its time (my mean is every 90 second) that will be failed and materialized view don't update
and STATUS filed in ALL_SCHEDULER_JOB_LOG is FAILED for this job
do you know what is wrong?
thanks

Answer 1

thank all of you i myself found the problem that was because of DATABASE LINK i used fixed user database link
and then the problem refined