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https://issues.apache.org/jira/browse/OOZIE-1319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13967878#comment-13967878
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Shaik Idris Ali commented on OOZIE-1319:
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We have some usecases related to realtime data pipeline with frequency around 
minutes(5), this feature is very handy specially when we have huge backlog of 
workflow instances, wherein we just pick the latest action and discard the rest.

> "LAST_ONLY" in execution control for coordinator job still runs all the 
> actions
> -------------------------------------------------------------------------------
>
>                 Key: OOZIE-1319
>                 URL: https://issues.apache.org/jira/browse/OOZIE-1319
>             Project: Oozie
>          Issue Type: Bug
>            Reporter: Bowen Zhang
>            Assignee: Bowen Zhang
>         Attachments: oozie-1319.patch
>
>
> In execute() of CoordJobGetReadyActionsJPAExecutor.java, once we retrieve the 
> top item from a "LIFO" query result, we do not discard or delete the 
> remaining items from the result list. As a result, the next time execute() is 
> invoked, we will be retrieving the next item in line. Consequently, LAST_ONLY 
> strategy will also execute all ready actions for a given coordinator job, 
> making it no different than LIFO.



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