Ivan Greene created AVRO-2369:
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             Summary: 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
             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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