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https://issues.apache.org/jira/browse/NIFI-3509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15959886#comment-15959886
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Joseph Percivall commented on NIFI-3509:
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[~mcgilman], on master I did various testing related to copy/pasting PGs and
making a template of those. I wasn't able to reproduce any problems related to
Copy/Paste. So I believe I messed up and didn't document something relating to
templates in my original example. I will modify the title/description.
Thanks to you and Oleg for tracking this down and fixing it!
> 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
> Fix For: 1.2.0
>
> 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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