Joseph Percivall created NIFI-5765:
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Summary: WriteJsonResult fails with Class Cast Exception when
Choice data type resolves to Array
Key: NIFI-5765
URL: https://issues.apache.org/jira/browse/NIFI-5765
Project: Apache NiFi
Issue Type: Bug
Reporter: Joseph Percivall
Attachments: Screen Shot 2018-10-29 at 2.35.50 PM.png,
WriteJsonResult_Choice_Array_example.xml
The problem is this line[1]. For the casting, it uses the passed in value
instead of the chosen data type.
A template demonstrating the problem is attached. The corner case is hit when
there is a choice of data types, and the data type chosen is Array. It properly
does everything else but fails when casting it due to:
org.apache.nifi.serialization.record.type.ChoiceDataType cannot be cast to
org.apache.nifi.serialization.record.type.ArrayDataType.
[1]
https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-standard-services/nifi-record-serialization-services-bundle/nifi-record-serialization-services/src/main/java/org/apache/nifi/json/WriteJsonResult.java#L379
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