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https://issues.apache.org/jira/browse/AVRO-1007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13203883#comment-13203883
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Scott Carey commented on AVRO-1007:
-----------------------------------
Should this work if any of the union branches are null, not just the first
branch? Although the spec mentions that a union default applies to the first
branch, there seems to be an implicit exception for null in the Java
implementation. The following has always worked:
{"type":"record", "name":"Rec", "fields":[{"name":"f", "type":["string",
"null"], "default":null}]}
The BuilderAPI does not need to hold to the spec however, and if any branch is
null, an unset field is ok IMO.
> Insufficient validation in generated specific record builder implementations
> ----------------------------------------------------------------------------
>
> Key: AVRO-1007
> URL: https://issues.apache.org/jira/browse/AVRO-1007
> Project: Avro
> Issue Type: Bug
> Affects Versions: 1.6.1
> Reporter: James Baldassari
> Assignee: James Baldassari
> Labels: java
> Fix For: 1.6.2
>
> Attachments: AVRO-1007-v2.patch, AVRO-1007-v3.patch,
> AVRO-1007-v4.patch, AVRO-1007.patch, AVRO-1007.patch, AVRO-1007.patch
>
>
> The are two main problems with the generated build() method in specific
> record builders:
> * For non-primitive types, if there is no default value and the user does not
> set the value, build() will execute successfully without throwing an exception
> ** Instead, an AvroRuntimeException should be thrown with an exception
> message indicating the name of the required field that was not set
> * For primitive types, if there is no default value and the user does not set
> the value, an AvroRuntimeException is thrown with the 'cause' set to a
> NullPointerException, which is not very helpful
> ** The NPE comes from attempting to set the primitive field to the result of
> defaultValue(), which is null
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