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https://issues.apache.org/jira/browse/SLING-5387?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15992790#comment-15992790
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Carsten Ziegeler commented on SLING-5387:
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[~chetanm] Thanks for the suggestion. I've implemented all of them now
> Provide support for running singleton jobs on non leader cluster nodes also
> ---------------------------------------------------------------------------
>
> Key: SLING-5387
> URL: https://issues.apache.org/jira/browse/SLING-5387
> Project: Sling
> Issue Type: Improvement
> Components: Commons
> Reporter: Chetan Mehrotra
> Assignee: Carsten Ziegeler
> Fix For: Commons Scheduler 2.5.4
>
>
> With SLING-2979 support for running singleton jobs on specific instance was
> provided. In most cases we want to run a job as singleton and not want to
> "pin" it to specific nodes. For this {{scheduler.runOn}} needs to be set to
> {{SINGLE}}.
> However per [current
> implementation|https://github.com/apache/sling/blob/org.apache.sling.commons.scheduler-2.4.14/src/main/java/org/apache/sling/commons/scheduler/impl/QuartzJobExecutor.java#L64]
> {{SINGLE}} is treated as {{LEADER}}. This effectively causes *all singleton*
> jobs to get executed on leader only thus putting extra load.
> For better utilization of cluster resources it should be possible to
> distribute such singleton jobs on other cluster nodes and still ensure that
> singleton contract is honoured!
> We would like to make use of this feature to ensure Oak AsyncIndexTask to run
> on different cluster nodes (OAK-2749)
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