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[Mahara Bot <1557160@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://reviews.mahara.org/7236
Committed: https://git.mahara.org/mahara/mahara/commit/81c04a73294e2b8defbd0836997599589cd747c0
Submitter: Robert Lyon (robertl@xxxxxxxxxxxxxxx)
Branch:    master

commit 81c04a73294e2b8defbd0836997599589cd747c0
Author: Robert Lyon <robertl@xxxxxxxxxxxxxxx>
Date:   Mon Nov 7 21:22:59 2016 +1300

Bug 1557160: Allow submission export re-queue clear any cron lock

Also added a couple of missing accessibility strings

behatnotneeded

Change-Id: Ia50f587ae0c46e4972086a72606796e1aa822642
Signed-off-by: Robert Lyon <robertl@xxxxxxxxxxxxxxx>

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https://bugs.launchpad.net/bugs/1557160

Title:
  PHP error when releasing and archiving submissions

Status in Mahara:
  Fix Committed

Bug description:
  Reported on bug #1549947:

  All of our courses (groups) are configured to archive submissions
  before release, so while the export_process_queue CRON task was
  processing about 150 collections (600 pages), PHP encountered a
  max_run_time error, and stopped the task partway through, so some were
  archived, but none were released.

  The export_process_queue task locks itself when it starts and cannot
  be run again until it has finished, but if it crashes it does not
  unlock.

  So for about 36 hours after this task crashed, anything that was
  flagged for release just said "Pending release after archiving" and
  nothing happened. I had to go into the config table in the database
  and deleted the lock, and clear out the export queue.

  So this potential error will need to be handled in some way, otherwise
  it will probably happen a lot more often if an entire class can be
  flagged for archiving & release all at once. 150 collections was only
  1/4 of the class.

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