Github user pvillard31 commented on the issue:
https://github.com/apache/nifi/pull/2219
@bbende @mcgilman - I just did few tests with latest changes and I want to
confirm this is the expected behaviour: if versioning a process groups with
defined variables that are used in processors of the PG, then updating the
values of the variables won't be considered as a change.
I do understand/agree that this is the expected behaviour: it is a way to
provide a generic flow that is configurable through variables and everyone can
instantiate the flow and update the variables for their own use case. Then, as
@JPercivall suggested, when importing a PG, it could be nice to have a dialog
window with all the variables included in the process group that need to be
configured (NIFIREG-81).
However if the flow evolves and variables are added/deleted, this is not
considered as a change. I'm a bit worried about this if it's not clearly
documented. Let's say in v1, I have a variable that is defined at versioned PG
level, and then, at v2, I removed the variable at PG level because I want to
use an environment variable. When updating to v2 in another environment, the
user will have to remember that the variable needs to be manually removed even
though the environment variable has been defined because the PG variable will
overide the environment variable.
I think that deleting/adding variables should be considered as a change for
the versioning. Thoughts? (this could totally be addressed in a separate JIRA)
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