+1 for unmarking old ones (made in `2.3.x` and before).
Thank you, Sean.

Bests,
Dongjoon.

On Wed, Aug 21, 2019 at 6:46 PM Sean Owen <sro...@apache.org> wrote:

> There are currently about 130 things marked as 'experimental' in
> Spark, and some have been around since Spark 1.x. A few may be
> legitimately still experimental (e.g. barrier mode), but, would it be
> safe to say most of these annotations should be removed for 3.0?
>
> What's the theory for evolving vs experimental -- would almost all of
> these items from, say, 2.3 and before be considered stable now, de
> facto? Meaning, if we wouldn't take a breaking change for them after
> 3.0, seems like they're stable.
>
> I can open a PR that removes most of it and see if anything looks
> wrong, if that's an easy way forward.
>
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