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From Felix Cheung <>
Subject Re: Scala 2.12 support
Date Thu, 07 Jun 2018 13:43:52 GMT

Spoke to Dean as well and mentioned the problem with 2.11.12

From: Sean Owen <>
Sent: Wednesday, June 6, 2018 12:23 PM
Subject: Re: Scala 2.12 support
To: Holden Karau <>
Cc: Dean Wampler <>, Reynold Xin <>, dev

If it means no change to 2.11 support, seems OK to me for Spark 2.4.0. The 2.12 support is
separate and has never been mutually compatible with 2.11 builds anyway. (I also hope, suspect
that the changes are minimal; tests are already almost entirely passing with no change to
the closure cleaner when built for 2.12)

On Wed, Jun 6, 2018 at 1:33 PM Holden Karau <<>>
Just chatted with Dean @ the summit and it sounds like from Adriaan there is a fix in 2.13
for the API change issue that could be back ported to 2.12 so how about we try and get this
ball rolling?

It sounds like it would also need a closure cleaner change, which could be backwards compatible
but since it’s such a core component and we might want to be cautious with it, we could
when building for 2.11 use the old cleaner code and for 2.12 use the new code so we don’t
break anyone.

How do folks feel about this?

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