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Posted to dev@kafka.apache.org by Ismael Juma <is...@juma.me.uk> on 2017/02/03 14:30:44 UTC
KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Hi all,
I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
https://cwiki.apache.org/confluence/display/KAFKA/KIP-119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
Please take a look. Your feedback is appreciated.
Thanks,
Ismael
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Martin Gainty <mg...@hotmail.com>.
because:
kafka will always be plagued by synchronisation issues between scala and java codebases:
Scala consistently fails converting Java generics (necessitating manual conversion from scala to Java)
+1 to drop Scala 2.10
(non-binding)
Martin
______________________________________________
________________________________
From: Colin McCabe <cm...@apache.org>
Sent: Monday, February 6, 2017 1:59 PM
To: users@kafka.apache.org
Subject: Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
+1 (non-binding) for KIP-119
I agree that supporting the 2 most recently release versions of Java and
Scala is a reasonable guideline. However, I think it makes sense to
have a brief discussion when dropping support for an old Java or Scala
version. It's a fairly infrequent event, and it's worth considering the
situation at the time. Each release brings its own set of benefits, and
people don't always adopt new releases with the same speed. For
example, it took people a long time to move from JDK6, but JDK7 seems to
have taken a shorter amount of time. If the upstream Java/Scala release
cadences speed up enough, we might want to support more than 2 versions.
And so forth.
best,
Colin
On Fri, Feb 3, 2017, at 08:10, Ismael Juma wrote:
> Hi Grant,
>
> That's an interesting point. It would be good to hear what others' think
> of
> making that the official policy instead of starting a discussion/vote
> each
> time. If there is consensus, I am happy to revise the KIPs. Otherwise, we
> keep them as they are and discuss/vote on this instance only.
>
> Ismael
>
> On Fri, Feb 3, 2017 at 3:41 PM, Grant Henke <gh...@cloudera.com> wrote:
>
> > Thanks for proposing this Ismael. This makes sense to me.
> >
> > In this KIP and the java KIP you state:
> >
> > A reasonable policy is to support the 2 most recently released versions so
> > > that we can strike a good balance between supporting older versions,
> > > maintainability and taking advantage of language and library
> > improvements.
> >
> >
> > What do you think about adjusting the KIP to instead vote on that as a
> > standard policy for Java and Scala going forward? Something along the lines
> > of:
> >
> > "Kafka's policy is to support the 2 most recently released versions of Java
> > and Scala at a given time. When a new version becomes available, the
> > supported versions will be updated in the next major release of Kafka."
> >
> >
> > On Fri, Feb 3, 2017 at 8:30 AM, Ismael Juma <is...@juma.me.uk> wrote:
> >
> > > Hi all,
> > >
> > > I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
> > >
> > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > > 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
> > >
> > > Please take a look. Your feedback is appreciated.
> > >
> > > Thanks,
> > > Ismael
> > >
> >
> >
> >
> > --
> > Grant Henke
> > Software Engineer | Cloudera
> > grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke
> >
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Colin McCabe <cm...@apache.org>.
+1 (non-binding) for KIP-119
I agree that supporting the 2 most recently release versions of Java and
Scala is a reasonable guideline. However, I think it makes sense to
have a brief discussion when dropping support for an old Java or Scala
version. It's a fairly infrequent event, and it's worth considering the
situation at the time. Each release brings its own set of benefits, and
people don't always adopt new releases with the same speed. For
example, it took people a long time to move from JDK6, but JDK7 seems to
have taken a shorter amount of time. If the upstream Java/Scala release
cadences speed up enough, we might want to support more than 2 versions.
And so forth.
best,
Colin
On Fri, Feb 3, 2017, at 08:10, Ismael Juma wrote:
> Hi Grant,
>
> That's an interesting point. It would be good to hear what others' think
> of
> making that the official policy instead of starting a discussion/vote
> each
> time. If there is consensus, I am happy to revise the KIPs. Otherwise, we
> keep them as they are and discuss/vote on this instance only.
>
> Ismael
>
> On Fri, Feb 3, 2017 at 3:41 PM, Grant Henke <gh...@cloudera.com> wrote:
>
> > Thanks for proposing this Ismael. This makes sense to me.
> >
> > In this KIP and the java KIP you state:
> >
> > A reasonable policy is to support the 2 most recently released versions so
> > > that we can strike a good balance between supporting older versions,
> > > maintainability and taking advantage of language and library
> > improvements.
> >
> >
> > What do you think about adjusting the KIP to instead vote on that as a
> > standard policy for Java and Scala going forward? Something along the lines
> > of:
> >
> > "Kafka's policy is to support the 2 most recently released versions of Java
> > and Scala at a given time. When a new version becomes available, the
> > supported versions will be updated in the next major release of Kafka."
> >
> >
> > On Fri, Feb 3, 2017 at 8:30 AM, Ismael Juma <is...@juma.me.uk> wrote:
> >
> > > Hi all,
> > >
> > > I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
> > >
> > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > > 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
> > >
> > > Please take a look. Your feedback is appreciated.
> > >
> > > Thanks,
> > > Ismael
> > >
> >
> >
> >
> > --
> > Grant Henke
> > Software Engineer | Cloudera
> > grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke
> >
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Ismael Juma <is...@juma.me.uk>.
Hi Grant,
That's an interesting point. It would be good to hear what others' think of
making that the official policy instead of starting a discussion/vote each
time. If there is consensus, I am happy to revise the KIPs. Otherwise, we
keep them as they are and discuss/vote on this instance only.
Ismael
On Fri, Feb 3, 2017 at 3:41 PM, Grant Henke <gh...@cloudera.com> wrote:
> Thanks for proposing this Ismael. This makes sense to me.
>
> In this KIP and the java KIP you state:
>
> A reasonable policy is to support the 2 most recently released versions so
> > that we can strike a good balance between supporting older versions,
> > maintainability and taking advantage of language and library
> improvements.
>
>
> What do you think about adjusting the KIP to instead vote on that as a
> standard policy for Java and Scala going forward? Something along the lines
> of:
>
> "Kafka's policy is to support the 2 most recently released versions of Java
> and Scala at a given time. When a new version becomes available, the
> supported versions will be updated in the next major release of Kafka."
>
>
> On Fri, Feb 3, 2017 at 8:30 AM, Ismael Juma <is...@juma.me.uk> wrote:
>
> > Hi all,
> >
> > I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
> >
> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
> >
> > Please take a look. Your feedback is appreciated.
> >
> > Thanks,
> > Ismael
> >
>
>
>
> --
> Grant Henke
> Software Engineer | Cloudera
> grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke
>
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Ismael Juma <is...@juma.me.uk>.
Hi Grant,
That's an interesting point. It would be good to hear what others' think of
making that the official policy instead of starting a discussion/vote each
time. If there is consensus, I am happy to revise the KIPs. Otherwise, we
keep them as they are and discuss/vote on this instance only.
Ismael
On Fri, Feb 3, 2017 at 3:41 PM, Grant Henke <gh...@cloudera.com> wrote:
> Thanks for proposing this Ismael. This makes sense to me.
>
> In this KIP and the java KIP you state:
>
> A reasonable policy is to support the 2 most recently released versions so
> > that we can strike a good balance between supporting older versions,
> > maintainability and taking advantage of language and library
> improvements.
>
>
> What do you think about adjusting the KIP to instead vote on that as a
> standard policy for Java and Scala going forward? Something along the lines
> of:
>
> "Kafka's policy is to support the 2 most recently released versions of Java
> and Scala at a given time. When a new version becomes available, the
> supported versions will be updated in the next major release of Kafka."
>
>
> On Fri, Feb 3, 2017 at 8:30 AM, Ismael Juma <is...@juma.me.uk> wrote:
>
> > Hi all,
> >
> > I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
> >
> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
> >
> > Please take a look. Your feedback is appreciated.
> >
> > Thanks,
> > Ismael
> >
>
>
>
> --
> Grant Henke
> Software Engineer | Cloudera
> grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke
>
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Grant Henke <gh...@cloudera.com>.
Thanks for proposing this Ismael. This makes sense to me.
In this KIP and the java KIP you state:
A reasonable policy is to support the 2 most recently released versions so
> that we can strike a good balance between supporting older versions,
> maintainability and taking advantage of language and library improvements.
What do you think about adjusting the KIP to instead vote on that as a
standard policy for Java and Scala going forward? Something along the lines
of:
"Kafka's policy is to support the 2 most recently released versions of Java
and Scala at a given time. When a new version becomes available, the
supported versions will be updated in the next major release of Kafka."
On Fri, Feb 3, 2017 at 8:30 AM, Ismael Juma <is...@juma.me.uk> wrote:
> Hi all,
>
> I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
>
> Please take a look. Your feedback is appreciated.
>
> Thanks,
> Ismael
>
--
Grant Henke
Software Engineer | Cloudera
grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Ismael Juma <is...@juma.me.uk>.
So far the feedback is positive, but there weren't many responses. I'll
start a vote next week if there are no objections until then.
Ismael
On Fri, Feb 3, 2017 at 2:30 PM, Ismael Juma <is...@juma.me.uk> wrote:
> Hi all,
>
> I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
>
> Please take a look. Your feedback is appreciated.
>
> Thanks,
> Ismael
>
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Ismael Juma <is...@juma.me.uk>.
So far the feedback is positive, but there weren't many responses. I'll
start a vote next week if there are no objections until then.
Ismael
On Fri, Feb 3, 2017 at 2:30 PM, Ismael Juma <is...@juma.me.uk> wrote:
> Hi all,
>
> I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
>
> Please take a look. Your feedback is appreciated.
>
> Thanks,
> Ismael
>
Re: KIP-119: Drop Support for Scala 2.10 in Kafka 0.11
Posted by Grant Henke <gh...@cloudera.com>.
Thanks for proposing this Ismael. This makes sense to me.
In this KIP and the java KIP you state:
A reasonable policy is to support the 2 most recently released versions so
> that we can strike a good balance between supporting older versions,
> maintainability and taking advantage of language and library improvements.
What do you think about adjusting the KIP to instead vote on that as a
standard policy for Java and Scala going forward? Something along the lines
of:
"Kafka's policy is to support the 2 most recently released versions of Java
and Scala at a given time. When a new version becomes available, the
supported versions will be updated in the next major release of Kafka."
On Fri, Feb 3, 2017 at 8:30 AM, Ismael Juma <is...@juma.me.uk> wrote:
> Hi all,
>
> I have posted a KIP for dropping support for Scala 2.10 in Kafka 0.11:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 119%3A+Drop+Support+for+Scala+2.10+in+Kafka+0.11
>
> Please take a look. Your feedback is appreciated.
>
> Thanks,
> Ismael
>
--
Grant Henke
Software Engineer | Cloudera
grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke