Joseph Percivall created NIFI-3509:
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Summary: 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
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
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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