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https://issues.apache.org/jira/browse/NIFI-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954150#comment-15954150
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Oleg Zhurakousky commented on NIFI-3509:
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Actually I believe [~mcgilman] is correct and the issue rooted in copy/paste
via template and it does appear that the logic there is different as it results
with two components with the same MSB (which should never happen). Working on
isolating the root cause. At least it is now fully reproducible.
> Creating templates of copied and pasted PGs can cause issues
> -------------------------------------------------------------
>
> Key: NIFI-3509
> URL: https://issues.apache.org/jira/browse/NIFI-3509
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.1.1
> Reporter: Joseph Percivall
> Assignee: Oleg Zhurakousky
> Priority: Critical
> Attachments: Screen Shot 2017-02-20 at 7.38.49 PM.png, Screen Shot
> 2017-02-20 at 7.53.21 PM.png, Screen Shot 2017-02-20 at 7.53.34 PM.png,
> templatesForNIFI-3509.zip
>
>
> Using the following steps I was able to create a template which instantiates
> with connections from one input port to another input port of another PG. See
> the template here[1].
> See the first attached screenshot for the seed flow. After importing, it
> originally gives an error "Cannot add Connection to Process Group because its
> destination does not belong to this Process Group" and nothing appears to be
> added but after I refresh the canvas parts of the original flow appear
> (screenshot 2 and 3).
> What is most odd, is that there are connections going from the input port
> "input" of pg "test" to the input ports of other PGs. I didn't think that was
> possible.
> The steps I used to create it:
> 1: create a PG "test" with input port "input", UpdateAttribute and output
> port "output". Creating connections between them.
> 2: Go to Parent group and copy "test".
> 3: Go back into "test" and paste.
> 4: Copy and paste "test" multiple times, creating the flow.
> 5: Create a template of the flow
> 6: When using the template, see the issue described.
> The root cause of the issues, I believe, is that the id for the parent group
> starts with "f3ac1eb5-1010-115a" and when I copied and pasted "test" into
> itself it created the "test" pg with an id starting with the same value.
> [1] https://gist.github.com/JPercivall/923519ef09500886c50a8f574f7662ca
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