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Promote/deploy changes in NIFI from registry

Promote/deploy changes in NIFI from registry

New Contributor

If an initial version of Nifi flow is deployed(lets say Flow1 and vesrion 1.0) and latter on we made some changes to the flow in DEV env(vesrion 1.1) it is committed to nifi registry and on PROD env we need to deploy the changes, then what should be the standard way of doing that? After stopping the older flow, if some flowfiles exists in the queue, it wont allow me to delete the flow or update it. How can I use the older queue with new flow ?

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