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https://issues.apache.org/jira/browse/NIFI-7123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17703273#comment-17703273
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Nissim Shiman commented on NIFI-7123:
-------------------------------------

Thank you [~markap14] for the background information and the best practices 
pattern to deal with situation.

At this point this is looking like maybe a tweak to the api document just to 
clarify that it is meant to always run on startup.

Thank you for your comment!

> onPropertyModified() is called on nifi start up even when properties have 
> never been modified
> ---------------------------------------------------------------------------------------------
>
>                 Key: NIFI-7123
>                 URL: https://issues.apache.org/jira/browse/NIFI-7123
>             Project: Apache NiFi
>          Issue Type: Bug
>    Affects Versions: 1.11.0
>            Reporter: Nissim Shiman
>            Priority: Major
>
> Processors and Controller Services inherit the onPropertyModified() method 
> from ConfigurableComponent. java [1]
> This method is called when nifi starts for all processors and controller 
> services, even for properties that are set to their defaults (i.e. have never 
> been modified).
> [1]  
> https://github.com/apache/nifi/blob/master/nifi-api/src/main/java/org/apache/nifi/components/ConfigurableComponent.java#L68



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