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https://issues.apache.org/jira/browse/NIFI-669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14580495#comment-14580495
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Matt Gilman commented on NIFI-669:
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[~markap14] Good catch. Thanks.
> Unable to add property to UpdateAttribute if property was just deleted
> ----------------------------------------------------------------------
>
> Key: NIFI-669
> URL: https://issues.apache.org/jira/browse/NIFI-669
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core UI
> Affects Versions: 0.2.0
> Reporter: Dan Bress
> Assignee: Matt Gilman
> Priority: Minor
> Attachments: 0001-NIFI-669.patch
>
>
> Steps to reproduce:
> 1) drag an UpdateAttribute to the graph
> 2) right click->configure->properties
> 3) add a new property, A=B
> 4) delete that property
> 5) add a new property A...
> At this point the UI will kick out saying "a property with this name already
> exists"
> When from the users perspective they cannot see a property with such a
> name(it was deleted).
> I'd recommend either updating the error message "you are adding a property
> that was recently deleted, please press 'apply' before readding this property"
> Or making it so you can re-add a property that was just deleted.
> *UPDATE* This affects all processors
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