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https://issues.apache.org/jira/browse/AVRO-1893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15406565#comment-15406565
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Ryan Blue commented on AVRO-1893:
---------------------------------
It looks like you're using a different {{ReflectData}} instance to read and
write. When you instantiate {{ReflectDatumReader}}, it uses
{{ReflectData.get()}} but you've added the UUID type to
{{ReflectData.AllowNulls.get()}}. You should use the same data model for both.
I also don't think it is a good idea to add conversions to the singleton
instances of {{GenericData}} and subclasses, like {{ReflectData}}. If you want
to change the conversions that are used, then I think the best practice is to
create a new instance.
> UUIDs are deserialized into Strings and not UUIDs
> -------------------------------------------------
>
> Key: AVRO-1893
> URL: https://issues.apache.org/jira/browse/AVRO-1893
> Project: Avro
> Issue Type: Bug
> Reporter: Sachin Goyal
> Attachments: TestUuidFields.java
>
>
> Here is a test that shows UUIDs are deserialized back into a string instead
> of UUID.
> Applications would expect UUID fields in their objects instead of strings
> when avro reads them back.
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