[jira] [Commented] (NIFI-7882) Null as default value in avro generates exception

["Michael W Moser (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-7882?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17762159#comment-17762159 ] 

Michael W Moser commented on NIFI-7882:
---------------------------------------

The Avro library was upgraded to 1.11.0 in NIFI-7234

> Null as default value in avro generates exception
> -------------------------------------------------
>
>                 Key: NIFI-7882
>                 URL: https://issues.apache.org/jira/browse/NIFI-7882
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Core Framework
>            Reporter: Dominik Przybysz
>            Priority: Major
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> When I have a record without value for fields, then missing fields will be populated with default values from schema. It was added in https://issues.apache.org/jira/browse/NIFI-4030
> But when null is default value then avro 1.8.1 returns org.apache.avro.JsonProperties$Null which cannot be converted to null value (the issue in avro is described in https://issues.apache.org/jira/browse/AVRO-1954) and processors fail with error:
> {code}
> ERROR o.a.n.p.standard.ConvertRecord - ConvertRecord[id=37460cbe-17f1-4456-a6b9-f4ed1baa4c45] Failed to process FlowFile[0,436030859382835.mockFlowFile,161B]; will route to failure: org.apache.avro.file.DataFileWriter$AppendWriteException: org.apache.avro.AvroRuntimeException: Unknown datum type org.apache.avro.JsonProperties$Null: org.apache.avro.JsonProperties$Null@1723f29f
> {code}
> Probably Apache Nifi should upgrade to newer avro or backport the fix from avro 1.9.x to AvroTypeUtil



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