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https://issues.apache.org/jira/browse/AVRO-2270?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Qing Wang updated AVRO-2270:
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Description: (was: Auto generated Avro schema with fields have union
type including null, can not be assigned to a non-null type default value. The
reason is Avro set null as the first type in the union. see [the source code
|https://github.com/apache/avro/blob/master/lang/java/avro/src/main/java/org/apache/avro/reflect/ReflectData.java]
line 694 // add null as the _first_ type in a new union.
Based on [https://avro.apache.org/docs/1.8.1/spec.html#Unions], in a union, the
type of the default value must match the _first_ element of the union.
Not very clear what is the reasons for this design. But in our use case, we
want some fields to be non mandatory, the auto generated schema would be
"type": ["null", "desired type"]. Due to the issue mentioned above, we can not
set a default value with desired type.)
> Can not set non-null type default value for auto generated Arvo schema with
> fields have null type
> -------------------------------------------------------------------------------------------------
>
> Key: AVRO-2270
> URL: https://issues.apache.org/jira/browse/AVRO-2270
> Project: Apache Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.8.2
> Reporter: Qing Wang
> Priority: Major
>
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