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https://issues.apache.org/jira/browse/AVRO-3064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17296560#comment-17296560
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Scott commented on AVRO-3064:
-----------------------------
Your schema is not a valid schema on its own. I'm assuming this is just a
snippet from a larger schema and the actual schema is something like this:
{code:java}
{
"type": "record",
"name": "some name",
"fields": [
{
"name": "exacAmt",
"type": [{"type": "fixed", "name": "exacAmt", "size": 16,
"logicalType": "decimal", "precision": 38, "scale": 2}, "null"]
}
]
}{code}
If that's the case, your data does not follow the JSON Encoding format. When a
union is involved and the value is not null, the value must include the type
information. You can see more details here:
[https://avro.apache.org/docs/current/spec.html#json_encoding]
So in your case, the data should look like this:
{code:java}
{"exacAmt": {"exacAmt": "123.45"}}{code}
The first "exacAmt" is the field name, and the second one is the type
information in the selected union.
> Issue: Unknown union branch fixed
> ---------------------------------
>
> Key: AVRO-3064
> URL: https://issues.apache.org/jira/browse/AVRO-3064
> Project: Apache Avro
> Issue Type: Task
> Components: java
> Affects Versions: 1.8.0
> Reporter: Divya
> Priority: Major
> Attachments: Screenshot from 2021-03-04 21-19-06.png
>
>
> Hello,
>
> We are looking for documentation on how a fixed value can be used with null.
> We are using avro-1.8.0 and trying to generate a Decimal value with the help
> of JSONDecoder for schema:
> {
> "name": "exacAmt",
> "type": [
> {
> "type": "fixed",
> "name": "exacAmt",
> "size": 16,
> "logicalType": "decimal",
> "precision": 38,
> "scale": 2
> },
> "null"
> ]
> }
> But we are getting an exception:
> _Message: Unknown union branch fixed_
> _Line | Method_
> _->> 445 | readIndex in org.apache.avro.io.JsonDecoder_
>
> Please advise how can this issue be resolved.
> !Screenshot from 2021-03-04 21-19-06.png!
>
>
>
>
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