I have heavyweight queue jobs that only need to run occasionally. Each item can take between 2 and 15 minutes to process. I run cron every minute and so workers build up in parallel to process these jobs.
If I set the lease time/timeout to 3 minutes (to avoid too much strain on the database from the jobs) then some work is repeated because the lease expires and another worker picks up the job again while the previous worker is still processing it.
If I set the lease time/timeout to 10 minutes then the site starts to fail in other ways because of load on the database.
Allow lease time and queue timeout to be set separately, e.g. for the example above I would like job timeout of 3 minutes (so the worker exits after this point once an item is complete) but lease time of 15 minutes (so long running work is not repeated).
Ultimate Cron does nothing special here - this is a core issue:
$end = $this->time->getCurrentTime() + $info['cron']['time'];
$queue = $this->queueFactory->get($queue_name);
$lease_time = $info['cron']['time'];
while ($this->time->getCurrentTime() < $end && ($item = $queue->claimItem($lease_time))) {
I need two different values for the two different uses of $info['cron']['time'].