[jira] [Updated] (NIFI-5765) WriteJsonResult fails with Class Cast Exception when Choice data type resolves to Array

["Joseph Percivall (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-5765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph Percivall updated NIFI-5765:
-----------------------------------
    Affects Version/s: 1.8.0

> 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
>    Affects Versions: 1.8.0
>            Reporter: Joseph Percivall
>            Priority: Major
>         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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