[
https://issues.apache.org/jira/browse/AVRO-4211?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18067155#comment-18067155
]
Zachary Payne edited comment on AVRO-4211 at 3/20/26 6:50 PM:
--------------------------------------------------------------
Sample input:
{code:java}
public class TestObject {
@Union({Void.class, String.class})
@AvroDefault("\"Test String\"")
public String myString = "Test String";
}{code}
Current output :
{code:java}
schema TestObject;
record TestObject {
string? myString = null;
}{code}
Expected output:
{code:java}
schema TestObject;
record TestObject {
string? myString = "Test String";
}{code}
was (Author: JIRAUSER312801):
Current sample output:
!image-2026-03-20-14-44-07-392.png!
Expected output:
!image-2026-03-20-14-44-46-833.png!
> IDLUtils cannot generate schema for union fields with a default value that is
> NOT the 1st element
> -------------------------------------------------------------------------------------------------
>
> Key: AVRO-4211
> URL: https://issues.apache.org/jira/browse/AVRO-4211
> Project: Apache Avro
> Issue Type: Improvement
> Reporter: Long Tang
> Assignee: Christophe Le Saec
> Priority: Major
>
> The 1.12.0 specification said that any type in the union can be the default
> value but in some places, this has NOT been implemented as of Dec 2025. For
> example: This is the Avro code that can only handle the first type in a union
> as the default value.
>
> [https://github.com/apache/avro/blob/3ab4c4622d254b69e559690753075119c31782d6/lang/java/avro/src/main/java/org/apache/avro/util/internal/JacksonUtils.java#L119]
>
>
> The IdlUtils uses the code above and fails to generate Avro schema in IDL if
> the schema contains union fields with default values that are NOT the 1st
> element of the union.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
