mcgilman opened a new pull request, #8771:
URL: https://github.com/apache/nifi/pull/8771

   NIFI-13155: 
   - Handling newer revisions in flow reducer to ensure that the appropriate 
version of the component is saved in case responses are received out of order.
   
   This addresses an issue that occurs for slow connections and there are very 
large flows. Under these circumstances, a user would issue a request to add or 
remove a component between when the canvas polling starts and completes. This 
can be easily simulated by adding a `delay` to the `pipe` following the API 
call and before `loadProcessGroupSuccess` is dispatched.
   
   This PR additional adds an override to skip the revision check when a nodes 
cluster connection state changes. This is important because the basis for 
component revisions changes when the node is connected to the cluster from when 
it's disconnected.


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