David Pfingst created NIFI-14361:
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Summary: Python Processor getDynamicPropertyDescriptor not working
Key: NIFI-14361
URL: https://issues.apache.org/jira/browse/NIFI-14361
Project: Apache NiFi
Issue Type: Bug
Components: Extensions
Affects Versions: 2.2.0
Reporter: David Pfingst
When using "getDynamicPropertyDescriptor" to create dynamic properties, an
unexpected behaviour was observed while progamming custom python processors in
NiFi 2.2.0.
If i define the processor with "FlowFileTransform", i can add properties, but
sometimes a validation error is thrown. When dynamic properties have been
defined and the container is restarted, a validation error is always thrown
because the properties cannot be mapped.
If i define the processor with "RecordTransform", a validation error is thrown
immediately as soon as a property is added because, again, the property cannot
be mapped. When the container is restarted in this case, all properties can be
mapped.
Both processor have exactly the same code.
I have defined the properties as follows:
{code:java}
def getDynamicPropertyDescriptor(self, name): return PropertyDescriptor(
name=name,
description="Specifies the value to set for the '"+ name +"' field",
expression_language_scope=ExpressionLanguageScope.FLOWFILE_ATTRIBUTE,
dynamic=True,
validators = [StandardValidators.ALWAYS_VALID]
) {code}
The actual error i get is:
<DYNAMIC_PROPERTY_NAME> against '< DYNAMIC_PROPERTY_VALUE>' is invalid because
"<DYNAMIC_PROPERTY_NAME> is not supported property or has no Validator
associated with it
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