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https://issues.apache.org/jira/browse/AVRO-3124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17335509#comment-17335509
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Ryan Skraba commented on AVRO-3124:
-----------------------------------

Hello!  I have an opinion (see AVRO-2343 , AVRO-3061) about parsing a value 
returned by *{{.toString()}}* – you will happier if you never attempt to parse 
that value.  It's not the same as JSON-encoded Avro, and it's not standardized 
across languages or across Avro versions!

If you want JSON, you should really be using the JsonEncoder/JsonDecoder 
classes.

But given that it's such a common request, let's fix it at least for temporal 
types!  Thanks for the PR.

> Java: toString serializer produces incorrect JSON fields for Temporal logical 
> types
> -----------------------------------------------------------------------------------
>
>                 Key: AVRO-3124
>                 URL: https://issues.apache.org/jira/browse/AVRO-3124
>             Project: Apache Avro
>          Issue Type: Bug
>          Components: java
>            Reporter: Artur Kalimullin
>            Assignee: Artur Kalimullin
>            Priority: Major
>
> When the java class has been generated using one of the Temporal logical 
> types and then converted to JSON using toString(), the output field does is 
> not a proper string:
>  
> {code:java}
> "operationTime": 2021-04-29T04:01:57.465Z
> {code}
> This is an ISO-8601 compliant string, so it should be treated as a string:
>  
> {code:java}
> "operationTime": "2021-04-29T04:01:57.465Z"
> {code}



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