Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/2773
I'm not exactly sure why the Bulletin itself has a `nodeAddress` field.
However, I can offer that the corresponding BulletinDTO contains a
`nodeAddress` to help differentiate between which node in the cluster is
reporting the message. This is populated when the responses are merged at the
cluster coordinator. In standalone mode, there is only a single instance so
this field does not need to be populated. This is also how component
`validationErrors` work.
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