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https://issues.apache.org/jira/browse/NIFI-14361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tomasz Korniszuk reassigned NIFI-14361:
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Assignee: (was: Tomasz Korniszuk)
> 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, 2.3.0, 2.4.0
> Reporter: David Pfingst
> Priority: Major
> Labels: Processor, Python
>
> 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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