I found the following details in PKPPLNDepositorTask-593a35f9895cf-20170609.log
[2017-06-09 05:45:29] [Notice] Task process started.
[2017-06-09 05:45:29] [Notice] Depositor processing for [journal_name]
[2017-06-09 05:45:29] [Notice] Getting service document.
[2017-06-09 05:45:30] [Notice] Processing deposit status updates.
[2017-06-09 05:45:30] [Notice] Processing updated content.
[2017-06-09 05:45:30] [Notice] Processing new content.
[2017-06-09 05:45:30] [Notice] Packaging content for deposit.