Operations has chosen to "drain" the initiators you displayed. This means they cannot run jobs. Period. End of story. You cannot "start" a drained initiator; only operations can do this.
A job waiting to execute is just that; no active initiator is available to run the job.
There are two methods an initiator can select a job.
- The JES2 standard method; a job is selected based on job class and job priority. For example, if initiator 17 was active, it would select the highest priority class H job, then the highest priority class P job and so on to the highest priority class M job. If there were no jobs in those classes, the initiator would go idle.
- "Goal" mode selection. z/OS tells JES2 which job to select. I've never closely studied this and can't tell you very much.
Some shops define some initiators as goal mode and others as traditional. Traditional initiators are often restricted to special jobs; it would be unwise to fake a special job if you see an idle traditional initiator.