Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/583
Hey @jvwing... I had a chance to check out the update. Everything looks
good but I do have one other comment that I probably should have noticed
before. Given the build details ultimately come from `nifi.properties` I don't
think we can rely on their presence. Often times, folks upgrade by retaining
their consisting `conf` directory so we typically try to ensure things still
work when the properties do not exist. In the System Diagnostics, it probably
makes sense to simply populate the fields with a message indicating that the
value isn't set. Additionally, you can style the elements with `unset`. In the
About dialog is probably makes sense to just not render anything under the
version. Currently, it just says 'Tagged'.
Thoughts?
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