Thumbnail queue sweeps and custom queue sweeps stop processing
failed queue entries after the number of failures exceeds a threshold.
To restart the processing of failed queue entries, a property must
be reset on each queue entry.
About this task
For most system implementations of queue sweeps, the maximum
number of failures property is set to zero by default, meaning that
the queue sweep attempts to reprocess failed queue entries an unlimited
number of times. One exception is the thumbnail generation queue sweep,
where the default maximum number of failures is three. Another exception
applies to any user-implemented custom queue sweep where the default
maximum number of failures is greater than zero. Each time a queue
entry fails to process, the sweep service increments the failure count
property on the queue entry. If the failure count value equals or
exceeds the maximum number of failures set for the queue sweep, the
queue entry property for the queue entry is set to a fail status and
the queue sweep no longer processes the failed queue entry.
To restart
the processing of failed queue entries, you must reset the failure
count property on each queue entry. Although you can use Administration
Console for Content Platform Engine to reset failed queue entries,
creating a custom sweep job for this task is a faster and more convenient
alternative for resetting large numbers of failed queue entries.