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From Mark Hamstra <m...@clearstorydata.com>
Subject Re: RFC: removing Scala 2.10
Date Tue, 07 Mar 2017 15:55:26 GMT
Sorry, for some reason I was thinking that we have branch-2.2 cut already.
If we're not going to pull Scala 2.10 out of 2.2.0, then we should wait at
least until that branch is cut before we pull it out of master -- but I'd
still argue for not long after that so that the 2.12 work can start.

On Tue, Mar 7, 2017 at 7:50 AM, Mark Hamstra <mark@clearstorydata.com>
wrote:

> I don't think 2.10 and 2.12 support can coexist, and soon, 2.12 support
>> will be important.
>>
>
> Which is why I'm thinking that we should pull 2.10 support out of master
> soon -- either immediately or right after 2.2 goes into RC or full release.
>
> On Tue, Mar 7, 2017 at 2:14 AM, Sean Owen <sowen@cloudera.com> wrote:
>
>> (2.10 was already deprecated for 2.1, so that's done actually.)
>>
>> Personally I'm fine with leaving in 2.10 support for 2.2. (FWIW CDH is
>> Scala 2.11-only for Spark 2.) If there were no voices in support of keeping
>> it, might be worth moving on right now, but if there's any substantive
>> argument against, I'd also punt it another release.
>>
>> It's not really driven by cleanup, though that's nice, but 2.12 support.
>> I don't think 2.10 and 2.12 support can coexist, and soon, 2.12 support
>> will be important.
>>
>> How about tagging this for 2.3.0, as well as targeting 2.12 support for
>> 2.3.0?
>>
>> On Tue, Mar 7, 2017 at 2:38 AM Reynold Xin <rxin@databricks.com> wrote:
>>
>>> Thanks for sending an email. I was going to +1 but then I figured I
>>> should be data driven. I took a look at the distribution of Scala versions
>>> across all the clusters Databricks runs (which is a very high number across
>>> a variety of tech startups, SMBs, large enterprises, and this is the chart:
>>>
>>> [image: scala-version.png]
>>>
>>>
>>>
>>> Given 30% are still on Scala 2.10, I'd say we should officially
>>> deprecate Scala 2.10 in Spark 2.2 and remove the support in a future
>>> release (e.g. 2.3). Note that in the past we only deprecated Java 7 /
>>> Python 2.6 in 2.0, and didn't do anything with Scala 2.10.
>>>
>>>
>>>
>>>
>>> On Mon, Mar 6, 2017 at 1:18 AM, Sean Owen <sowen@cloudera.com> wrote:
>>>
>>> Another call for comments on removal of Scala 2.10 support, if you
>>> haven't already. See
>>>
>>> https://github.com/apache/spark/pull/17150
>>> http://issues.apache.org/jira/browse/SPARK-19810
>>>
>>> I've heard several votes in support and no specific objections at this
>>> point, but wanted to make another call to check for any doubts before I go
>>> ahead for Spark 2.2.
>>>
>>>
>>>
>

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