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https://issues.apache.org/jira/browse/NIFI-5822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Payne updated NIFI-5822:
-----------------------------
    Priority: Blocker  (was: Major)

> ControllerServices not available during @OnScheduled
> ----------------------------------------------------
>
>                 Key: NIFI-5822
>                 URL: https://issues.apache.org/jira/browse/NIFI-5822
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Peter Wicks
>            Priority: Blocker
>             Fix For: 1.9.0
>
>
> If a processor tries to load a ControllerService during `@OnScheduled`, then 
> `context.getControllerService` contains a null reference to 
> `controllerServiceProvider`. I traced this back to 
> `StandardProcessScheduler.startProcessor`, and the reference to 
> `controllerServiceProvider` is also `null` here. `ExecuteSQL` acquires it's 
> connection during `@OnScheduled`.
> But once we reach `onTrigger`, everything is fine and you can retrieve a 
> controller service without issue



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