Mark Payne created NIFI-9352:
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Summary: Components that reference variable in user-defined
property are not stopped/restarted when variable is updated
Key: NIFI-9352
URL: https://issues.apache.org/jira/browse/NIFI-9352
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Affects Versions: 1.15.0
Reporter: Mark Payne
Assignee: Mark Payne
Fix For: 1.15.0
When a Process Group's variable is updated, any component that references that
variable must first be stopped and then restarted. However, if a processor
references the variable in a user-defined property, it does not get stopped &
restarted.
To illustrate:
- Create a GenerateFlowFile processor
- Add a user-defined property if "Hello" with a value of "${greeting}"
- Create a variable named "greeting" in the Process Group and give it any value
- say "hello".
- Connect GenerateFlowFile to an UpdateAttribute and set the Run Schedule to "1
hour".
- Start GenerateFlowFile. It should run once.
- Update variable to have a value of "good-bye".
- After changes have been applied, you should have seen GenerateFlowFile run
twice - once with a value of "hello" and again with a value of "good-bye" but
currently you'll see it have only run once.
As a result, when a variable is change, it may not take effect on all
processors until restart of NiFi.
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