Comment 2 for bug 685640

Reviewed: https://reviews.mahara.org/1054
Committed: http://gitorious.org/mahara/mahara/commit/ae76bab037afe6af75c5180bc3137d5770df316f
Submitter: Francois Marier (<email address hidden>)
Branch: master

commit ae76bab037afe6af75c5180bc3137d5770df316f
Author: Richard Mansfield <email address hidden>
Date: Thu Feb 16 10:45:02 2012 +1300

    Try to remove lock when exception thrown in cron function (bug #685640)

    If a cron function causes an exception for whatever reason, then the
    cron will stop, but the lock isn't removed. The job then isn't tried
    again for another 24 hours.

    Instead we should try to set the next run time and remove the lock.
    Cron functions that run frequently, but fail due to some temporary
    problem, will not be forced to stop for 24 hours. On the other hand,
    very frequent cron functions that throw exceptions on every run will
    be spammy.

    Obviously, this change has no effect on cron functions that fail due
    to script timeouts, out-of-memory errors, or which exit for any other
    reason.

    Change-Id: I3bfe08c2ebba62cbd82045e66438a6442d1f1fe8
    Signed-off-by: Richard Mansfield <email address hidden>