Event based scheduler job - 2 events at the same time only 1 run

Question

Hi,
i converted our dbms_job - jobs to the newer package dbms_scheduler.
It is a 10.2.0.4 patch 23(8609347) database on an windows server 2003 R2 Enterprise x64 Edition SP2.
The Jobs(about 130) are nothing special ... only some statistics, matview-refreshes and so on.
For the notification of failed jobs and jobs which run over the max_run_duration i downloaded and installed the job notification package.
The jobs are assigned to different departments and the corresponding developer teams in our company.
I created a notification job for each department and if a job fails we (the database administrators) and the corresponding deverlopers will be informed.
Now i ascertained that only 1 email will be send if 2 jobs of the same department fails at the same time.
The emailer-jobs are auto-generated by the job notification package. I only modified them to look after all jobs of special department and not only after one job. (--> event_condition ... object_name LIKE 'XXX%')
example for dba-jobs(copy of the script output of TOAD):
SYS.DBMS_SCHEDULER.CREATE_JOB
       job_name        => 'DBA_JOBS_EMAILER'
      ,start_date      => NULL
      ,event_condition => tab.user_data.object_name LIKE ''DBA%'' AND tab.user_data.event_type in (''JOB_FAILED'',''JOB_OVER_MAX_DUR'')'
      ,queue_spec      => 'SYS.SCHEDULER$_EVENT_QUEUE, JOB_FAILED_AGENT'
      ,end_date        => NULL
      ,program_name    => 'SYS.EMAIL_NOTIFICATION_PROGRAM'
      ,comments        => 'Auto-generated job to send email alerts for jobs "DBA%"'
    );I thought that a queue is used to manage all events from the scheduler jobs. So i made a test with 2 dba jobs and simulated a failure at the same time but i received only one mail.
So what is happend with the second event? I looked for the events in the qtab(SCHEDULER$_EVENT_QTAB) which belongs to the event queue(SYS.SCHEDULER$_EVENT_QUEUE) and no event was missing.
So i think the emailer job has to run 2 times.
Is anyone able to explain or to find my mistake?
I know that the easiest way is to create one emailer job for each normal job but i think this is a little bit costly because all the arguments are the same for one department.
Thanks & Regards

Answer 1

Thanks for your fast answer.
You are right with the "enabled => TRUE;" part and i only forgot to post it.
So the Job is enabled (otherwise it would not send any mail). Because it is sending one mail i think it is also not necessary to hand over a job_type.
Additionally the job starts a program ... so it is right to set the job_type='STORED_PROCEDURE' isn't it?
And also right ... i already added the agent as subscriber to the queue.
Anyway i think the whole thing do what it have to do. So in my oppinion there are no big mistakes in creating the job or at adding the subscriber.
There are also no problem in raising the events by itself and enqueue them in the scheduler event queue.
There is only a problem when 2 jobs fails (or run out ouf max duration) at exactly the same time.
If i understand it right:
The agent/subscriber will find the "JOB_FAILED"-event for the first Job in the queue and starts the emailer Job.
The agent will also find the "JOB_FAILED"-event for the second Job and wants to start the emailer Job again.
I don't know if this is really the problem but perhaps the emailer-job can not be started in consequence of the second event because ist is already running.
I also don't know if this is a mistake of the agent or of the emailer-job by itself.
I only want that it runs two times (one run for each event). I my case it also doesn't matter which email is send at first.