macdoor615 created NIFI-11162:
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Summary: When upgrading, roll restart nodes to avoid cluster
shutdown
Key: NIFI-11162
URL: https://issues.apache.org/jira/browse/NIFI-11162
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Affects Versions: 1.20.0
Reporter: macdoor615
Fix For: 2.0.0
The current upgrade requires stopping all nodes at the same time, upgrading all
nodes, and then restarting all nodes, which will interrupt the service.
It is recommended to support rolling upgrades, each node is stopped, upgraded,
and restarted one by one to avoid service interruption.
Before all nodes are upgraded, the early version of the inter-connection
protocol is adopted between nodes. When all nodes are upgraded, the
inter-connection protocol will upgrade to the current version.
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