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https://issues.apache.org/jira/browse/AVRO-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16811175#comment-16811175
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ASF subversion and git services commented on AVRO-2369:
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Commit fa1a8ef805111c4bb0d6e5fc59e635cf72d33d14 in avro's branch
refs/heads/master from Daniel Kulp
[ https://gitbox.apache.org/repos/asf?p=avro.git;h=fa1a8ef ]
[AVRO-2369] Add a way to specify a null default for unions with a null.
> Provide external way to construct Schema.Field with default value of 'null'
> ---------------------------------------------------------------------------
>
> Key: AVRO-2369
> URL: https://issues.apache.org/jira/browse/AVRO-2369
> Project: Apache Avro
> Issue Type: Task
> Components: java
> Reporter: Ivan Greene
> Priority: Blocker
> Fix For: 1.9.0
>
>
> After making the Schema.Field constructor which takes the default value as a
> JsonNode was made package private, there is no external way to construct a
> field that has a default value of 'null'. Internally that constructor will
> call {{JacksonUtils.toJsonNode(defaultValue)}}, which will return 'null' when
> passed null, and the resulting Field will not have a default value (the json
> node would need to be NullNode instead of simply null itself). This will
> affect projects that need a way to dynamically build schemas and their fields.
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