The default for a union is interpreted as the type of its first branch.
https://avro.apache.org/docs/current/spec.html#Unions
Thus, in your example, if you want a nullable byte array, place "null"
first in the union, e.g.:
{"type":"record","name":"hello","fields":[{"name":"id","type":["null",
"bytes"],"default":null}]}
Doug
On Mon, Jun 4, 2018 at 2:02 AM kant kodali <kanth...@gmail.com> wrote:
> Hi All,
>
> What is the default value I can specify for bytes when it is in union?
>
> Tried the following and all fail.
>
> {"type":"record","name":"hello","fields":[{"name":"id","type":["bytes",
> "null"],"default":null}]}
> {"type":"record","name":"hello","fields":[{"name":"id","type":["bytes",
> "null"],"default":"null"}]}
> {"type":"record","name":"hello","fields":[{"name":"id","type":["bytes",
> "null"],"default":"\u00FF"}]}
>
> Thanks!
>
>
