Mark Payne created NIFI-9336:
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Summary: 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
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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