Andy LoPresto created NIFI-4555:
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Summary: Improve error messaging when missing components in flow
definition during cluster copy
Key: NIFI-4555
URL: https://issues.apache.org/jira/browse/NIFI-4555
Project: Apache NiFi
Issue Type: Improvement
Components: Core Framework
Affects Versions: 1.4.0
Reporter: Andy LoPresto
I recently diagnosed an issue where a user copied a {{flow.xml.gz}} file from
one NiFi instance to another and the destination node failed to start. We
determined that the origin node had custom NARs loaded containing components
that did not exist on the destination node. The error messaging in the
{{nifi-app.log}} file was not helpful for determining this issue.
I propose improving the error message to be much clearer about what is
happening and what specific components are missing, and possibly bringing up
the UI with "ghosted" components displayed in the UI (and the flow unavailable
to be started until that is resolved).
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