Yes, although it is basically a continuation of the 1.3.x series with
better ALPN support (although as it currently stands it has a lot more
bug fixes that are not in 1.3.x).

In the near future I am going to redo the undertow.io site to make it
much easier to maintain.

Stuart

On Wed, Apr 5, 2017 at 10:57 PM, Grzegorz Pietrusza
<gpietrusza@gmail.com> wrote:
> Hi undertow-dev
>
> Is undertow 1.4.X production ready? I see it's released in maven central,
> but it's not documented or mentioned anywhere at undertow.io.
>
> Regards
> Grzegorz
>

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