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https://issues.apache.org/jira/browse/SLING-2979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15063429#comment-15063429
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Chetan Mehrotra commented on SLING-2979:
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bq. What exactly does SINGLE mean? Which node will execute the jobs then?
SINGLE for now means {{LEADER}}. Opened SLING-5387 to have a better
implementation
> Add support for running scheduled task on specific instances
> ------------------------------------------------------------
>
> Key: SLING-2979
> URL: https://issues.apache.org/jira/browse/SLING-2979
> Project: Sling
> Issue Type: New Feature
> Components: Commons
> Reporter: Carsten Ziegeler
> Assignee: Carsten Ziegeler
> Fix For: Commons Scheduler 2.4.0
>
>
> With the new topology api we have support for leader election. In many cases
> scheduled tasks should only run on a single instance in a cluster. So far
> this can only be done by manually adding the task through the Scheduler
> interface but not with the whiteboard support.
> We should add a new property scheduler.leaderonly which defaults to false but
> can be set to true. IN this case the task is only started on the leader.
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