[jira] [Assigned] (NIFI-9336) When configuring component properties, UI should flag/make obvious when there is whitespace

["M Tien (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-9336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

M Tien reassigned NIFI-9336:
----------------------------

    Assignee: M Tien

> When configuring component properties, UI should flag/make obvious when there is whitespace
> -------------------------------------------------------------------------------------------
>
>                 Key: NIFI-9336
>                 URL: https://issues.apache.org/jira/browse/NIFI-9336
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core UI
>            Reporter: Mark Payne
>            Assignee: M Tien
>            Priority: Major
>
> It is a very common problem that users will copy & paste values into the property configuration for a processor/controller service/etc. And this often results in unwanted white space at the beginning or end of the property value (especially the end). This can have very confusing results, like indicating that a hostname cannot be found or that credentials are invalid, etc. but the issue is not obvious when an error message looks like:
> {{No route to host: 1.1.1.1}}
> At the same time, we cannot simply have NiFi trim all property values, because sometimes white space is important. For example, Merge Content allows a header/footer/demarcator which may well intentionally include whitespace.
> While we could add an indicator to Property Descriptors to address this issue, such as:
>  {{.trimWhiteSpace(true)}}
> it will be easy to forget adding that to the Property Descriptor, and if we default it to true, it would change behavior of many processors unexpectedly.
> Since we cannot trim the values automatically, the UI should flag this when configuring property values, making it very clear that there is leading or trailing whitespace.



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