markap14 commented on PR #6154:
URL: https://github.com/apache/nifi/pull/6154#issuecomment-1196795533

   @thenatog indeed I see the same issue in:
   ```
   ProcessGroupsEndpointMerger
   ProcessorsEndpointMerger
   RemoteProcessGroupsEndpointMerger
   UserGroupsEndpointMerger
   UsersEndpointMerger
   ```
   
   Additionally, while we are at it, IntelliJ flagged a separate issue that we 
should address in the mergers.
   The `RuntimeManifestEndpointMerger` has this line:
   ```
               responseBundles.retainAll(nodeResponseBundles);
   ```
   
   BUT `responseBundles` is defined as:
   ```
           final Set<Bundle> responseBundles = responseManifest.getBundles() == 
null ? Collections.emptySet() : new 
LinkedHashSet<>(responseManifest.getBundles());
   ```
   Which means that `responseBundles` may be an immutable set. We should change 
that to use ` ... == null ? new HashSet<>() : new LinkedHashSet...`
   


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