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From Robert Metzger <rmetz...@apache.org>
Subject Re: [POLL] Who still uses Java 7 with Flink ?
Date Thu, 08 Jun 2017 15:39:09 GMT
Hi all,

as promised in March, I want to revive this discussion!

Our users are begging for Scala 2.12 support [1], migration to Akka 2.4
would solve a bunch of shading / dependency issues (Akka 2.4 will remove
Akka's protobuf dependency [2][3]) and generally Java 8's new language
features all speak for dropping Java 7.

Java 8 has been released in March, 2014. Java 7 is unsupported since June
2016.

So what's the feeling in the community regarding the step?


[1] https://issues.apache.org/jira/browse/FLINK-5005#
[2] https://issues.apache.org/jira/browse/FLINK-5989
[3] https://issues.apache.org/jira/browse/FLINK-3211?
focusedCommentId=15274018&page=com.atlassian.jira.
plugin.system.issuetabpanels:comment-tabpanel#comment-15274018


On Thu, Mar 23, 2017 at 2:42 PM, Theodore Vasiloudis <
theodoros.vasiloudis@gmail.com> wrote:

> Hello all,
>
> I'm sure you've considered this already, but what this data does not
> include is all the potential future users,
> i.e. slower moving organizations (banks etc.) which could be on Java 7
> still.
>
> Whether those are relevant is up for debate.
>
> Cheers,
> Theo
>
> On Thu, Mar 23, 2017 at 12:14 PM, Robert Metzger <rmetzger@apache.org>
> wrote:
>
>> Yeah, you are right :)
>> I'll put something in my calendar for end of May.
>>
>> On Thu, Mar 23, 2017 at 12:12 PM, Greg Hogan <code@greghogan.com> wrote:
>>
>>> Robert,
>>>
>>> Thanks for the report. Shouldn’t we be revisiting this decision at the
>>> beginning of the new release cycle rather than near the end? There is
>>> currently little cost to staying with Java 7 since no Flink code or pull
>>> requests have been written for Java 8.
>>>
>>> Greg
>>>
>>>
>>>
>>> On Mar 23, 2017, at 6:37 AM, Robert Metzger <rmetzger@apache.org> wrote:
>>>
>>> Looks like 9% on twitter and 24% on the mailing list are still using
>>> Java 7.
>>>
>>> I would vote to keep supporting Java 7 for Flink 1.3 and then revisit
>>> once we are approaching 1.4 in September.
>>>
>>> On Thu, Mar 16, 2017 at 8:00 AM, Bowen Li <bowen.li@offerupnow.com>
>>> wrote:
>>>
>>>> There's always a tradeoff we need to make. I'm in favor of upgrading to
>>>> Java 8 to bring in all new Java features.
>>>>
>>>> The common way I've seen (and I agree) other software upgrading major
>>>> things like this is 1) upgrade for next big release without backward
>>>> compatibility and notify everyone 2) maintain and patch current, old-tech
>>>> compatible version at a reasonably limited scope. Building backward
>>>> compatibility is too much for an open sourced project
>>>>
>>>>
>>>>
>>>> On Wed, Mar 15, 2017 at 7:10 AM, Robert Metzger <rmetzger@apache.org>
>>>> wrote:
>>>>
>>>>> I've put it also on our Twitter account:
>>>>> https://twitter.com/ApacheFlink/status/842015062667755521
>>>>>
>>>>> On Wed, Mar 15, 2017 at 2:19 PM, Martin Neumann <martin.neumann@ri.se>
>>>>> wrote:
>>>>>
>>>>> > I think this easier done in a straw poll than in an email
>>>>> conversation.
>>>>> > I created one at: http://www.strawpoll.me/12535073
>>>>> > (Note that you have multiple choices.)
>>>>> >
>>>>> >
>>>>> > Though I prefer Java 8 most of the time I have to work on Java 7.
A
>>>>> lot of
>>>>> > the infrastructure I work on still runs Java 7, one of the companies
>>>>> I
>>>>> > build a prototype for a while back just updated to Java 7 2 years
>>>>> ago. I
>>>>> > doubt we can ditch Java 7 support any time soon if we want to make
>>>>> it easy
>>>>> > for companies to use Flink.
>>>>> >
>>>>> > cheers Martin
>>>>> >
>>>>> > //PS sorry if this gets sent twice, we just migrated to a new mail
>>>>> system
>>>>> > and a lot of things are broken
>>>>> >
>>>>> > ________________________________
>>>>> > From: Stephan Ewen <sewen@apache.org>
>>>>> > Sent: Wednesday, March 15, 2017 12:30:24 PM
>>>>> > To: user@flink.apache.org; dev@flink.apache.org
>>>>> > Subject: [POLL] Who still uses Java 7 with Flink ?
>>>>> >
>>>>> > Hi all!
>>>>> >
>>>>> > I would like to get a feeling how much Java 7 is still being used
>>>>> among
>>>>> > Flink users.
>>>>> >
>>>>> > At some point, it would be great to drop Java 7 support and make
use
>>>>> of
>>>>> > Java 8's new features, but first we would need to get a feeling
how
>>>>> much
>>>>> > Java 7 is still used.
>>>>> >
>>>>> > Would be happy if users on Java 7 respond here, or even users that
>>>>> have
>>>>> > some insights into how widespread they think Java 7 still is.
>>>>> >
>>>>> > Thanks,
>>>>> > Stephan
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>>
>>>>
>>>>
>>>
>>>
>>
>

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