Ferenc Gerlits created MINIFICPP-2568:
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Summary: Do not log errors when loading a Python base class
Key: MINIFICPP-2568
URL: https://issues.apache.org/jira/browse/MINIFICPP-2568
Project: Apache NiFi MiNiFi C++
Issue Type: Improvement
Affects Versions: 0.99.1
Reporter: Ferenc Gerlits
If multiple Python processors inherit from the same base class, and the base
class does not implement the {{transform()}} method, then MiNiFi logs errors
like this during startup:
{noformat}
[2025-05-27 10:19:14.726]
[org::apache::nifi::minifi::extensions::python::processors::ExecutePythonProcessor]
[error] Failed to initialize python processor 'BaseProcessor' due to error:
TypeError: Can't instantiate abstract class BaseProcessor without an
implementation for abstract method 'transform'
(0a3d9648-3ae4-11f0-ae73-0242ac180002)
[2025-05-27 10:19:14.726]
[org::apache::nifi::minifi::extensions::python::PythonCreator] [error] Could
not process BaseProcessor.py: TypeError: Can't instantiate abstract class
BaseProcessor without an implementation for abstract method 'transform'
{noformat}
This is a minor issue because the errors are ignored and everything works
correctly despite them, but we should not log errors when there is no problem.
MINIFICPP-2499 was a similar issue, but the fix for that ticket did not fix
errors like this.
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