Matt Gilman created NIFI-4068:
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Summary: Add first class support for rolling upgrades
Key: NIFI-4068
URL: https://issues.apache.org/jira/browse/NIFI-4068
Project: Apache NiFi
Issue Type: Improvement
Components: Core Framework
Reporter: Matt Gilman
We need to add first class support for rolling upgrades. Currently, all nodes
need to be upgraded at the same time as our clustering model assumes all nodes
are running the same version of the REST API and support the same data model
used by that API. Based on which node is the active coordinator, it may be
attempting to unmarshal a response from a newer version of NiFi.
Additionally, the introduction of versioned components assumes that all nodes
are running the same version of that component. This is necessary since
different versions may support different properties, relationships, etc. And
depending on the version of NiFi that is the active coordinator, the results to
the client could vary (if they unmarshalled successfully).
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