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https://issues.apache.org/jira/browse/NIFI-6160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16808436#comment-16808436
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Koji Kawamura commented on NIFI-6160:
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[~andrewmlim] I've submitted a PR. Also, looked at other existing error
handling logics and fixed those as well.
Please look at the PR's description for detail.
https://github.com/apache/nifi/pull/3401#issue-266920867
> During process group creation, if no name is provided, improve error pop-up
> and do not close creation window
> ------------------------------------------------------------------------------------------------------------
>
> Key: NIFI-6160
> URL: https://issues.apache.org/jira/browse/NIFI-6160
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core UI
> Reporter: Andrew Lim
> Assignee: Koji Kawamura
> Priority: Minor
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When creating a Process group and providing no name, a pop-up appears with
> the title "Create Process Group" with the message "The group name is
> required." Selecting OK returns the user to the canvas. User has to drag a
> PG again onto the canvas to resume the process.
> It should be more like RPG creation. During RPG creation, if no name is
> provided a pop-up with the title "Configuration Error" is shown with the
> message "The URI of the process group must be specified." Selecting OK
> returns the user to the Add Remote Process Group window. This is a good UX.
> So applying this to process group creation. If no name is supplied:
> * open a pop-up with the title "Configuration Error"
> * the message should say "The name of the process group must be specified."
> * Selecting OK returns the user to the "Add Process Group" window
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