super small nit: This looks a little clumsy. I would do something like
`"Got job %s (%s) with %d output partitions (allowLocal=%s)".format(job.jobId, callSite, partitions.length, allowLocal"`
or
`s"Got job $job.jobId ($callSite) with $partitions.length output partitions (allowLocal=$allowLocal)"`

If you decide do make this change, we should use the same string formatting elsewhere in this file