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https://issues.apache.org/jira/browse/NIFI-4863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16358934#comment-16358934
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ASF GitHub Bot commented on NIFI-4863:
--------------------------------------

Github user bbende commented on the issue:

    https://github.com/apache/nifi/pull/2462
  
    +1 Ran through test scenarios with input and output ports on RPGs in 
versioned flows and this appears to clear up all the issues, merging to master


> If changing version of flow and new flow has no connection to RPG Port, can 
> get error saying unable to start components
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: NIFI-4863
>                 URL: https://issues.apache.org/jira/browse/NIFI-4863
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>    Affects Versions: 1.5.0
>            Reporter: Mark Payne
>            Assignee: Mark Payne
>            Priority: Major
>
> When we have a Remote Process Group with multiple ports, we push to the flow 
> registry the ports that we have connections for. I have a connection to Port 
> A and save that to the flow registry, then create a connection to Port B. I 
> have RPG transmitting data. Then I revert local changes. This properly 
> reverts the flow but fails to restart components. This is because it is 
> attempting to start Port B, and there are no connections for that Port.



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