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https://issues.apache.org/jira/browse/NIFI-14331?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Stieglitz reassigned NIFI-14331:
---------------------------------------

    Assignee: Daniel Stieglitz

> Unknown embedded fields not dropped by JSON Writer as expected by specified 
> schema
> ----------------------------------------------------------------------------------
>
>                 Key: NIFI-14331
>                 URL: https://issues.apache.org/jira/browse/NIFI-14331
>             Project: Apache NiFi
>          Issue Type: Bug
>    Affects Versions: 2.2.0
>            Reporter: Daniel Stieglitz
>            Assignee: Daniel Stieglitz
>            Priority: Major
>         Attachments: convertRecordResults.json, person.avsc, 
> person_dropfield.json
>
>
> NIFI-13843 was aimed to eliminate any fields found in the JSON which were not 
> defined in a specifed Avro schema. While that fix seems to have solved the 
> issue for top level items it did not solve the issue for an undefined key 
> within a defined object and for an undefined key  in a defined object for an 
> array. Attached are the person.avsc Avro schema and the person_dropfield.json 
> which includes undefined top level fields such as single key value pair 
> ("undefinedKey"), array ("undefinedScalarArray"), object ("undefinedObject") 
> and object array ("undefinedObjectArray"). It also includes undefined field 
> ("undefinedKeyInObject") inside the defined "name" top level object and an 
> undefined field ("undefinedKeyInObject") in a "job" object found in the 
> "jobs" array. The result after calling ConvertRecord can be seen in the 
> attached convertRecordResults.json. Note fields "undefinedKey", 
> "undefinedScalarArray", "undefinedObject" and "undefinedObjectArray" all get 
> dropped while fields "undefinedKeyInObject" still exist in the "name" object 
> and the "job" object inside the "jobs" array.
> Currently this behavior is seen in both ConvertRecord and MergeRecord when 
> both are configured with a JsonTreeReader and JsonRecordSetWriter.
> It is interesting to note this behavior is seen in NIFI 1.28.1 only for 
> MergeRecord while ConvertRecord drops all unknown fields.



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