Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-27 Thread zhenya Sun 


   I'm terribly sorry that I made such a mistake.
Thank you for your suggestion！


| |
zhenya Sun
邮箱：toke...@126.com
|

签名由 网易邮箱大师 定制

On 03/27/2018 04:38, Matthias J. Sax wrote:
Thanks Ted for pointing out.

Sorry for this mistake Zhenya. You should not have voted twice though ;)

(Even if it was the same email address, so I could have figured this out
by myself -- did not pay close enough attention.)

No bid deal. The KIP is accepted with +6/+3 votes than.


-Matthias

On 3/26/18 12:54 PM, Ted Yu wrote:
> Congratulations.
>
> BTW I believe 孙振亚 and Zhenya is the same person - Zhenya is the PinYin of 振亚
>
> Cheers
>
> On Mon, Mar 26, 2018 at 12:51 PM, Matthias J. Sax 
> wrote:
>
>> +1 (binding)
>>
>>
>> I am also cloeing this vote. The KIP is accepted with
>>
>> +7 non-binding (Richard, Ted, 孙振亚, Bill, James, John, Zhenya)
>> +3 binding (Damian, Guozhang, Matthias)
>>
>> votes.
>>
>>
>> Thanks a lot!
>>
>>
>> -Matthias
>>
>>
>> On 3/22/18 4:13 PM, zhenya Sun wrote:
>>> +1
>>>
>>>
>>> | |
>>> zhenya Sun
>>> 邮箱：toke...@126.com
>>> |
>>>
>>> 签名由 网易邮箱大师 定制
>>>
>>> On 03/23/2018 03:34, James Cheng wrote:
>>> +1 (non-binding)
>>>
>>> -James
>>>
 On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:

 +1

 On Wed, 21 Mar 2018 at 01:44 abel-sun 
>> wrote:

>
>   Thanks you of your offer ,agree with you!
>
> On 2018/03/21 00:56:11, Richard Yu  wrote:
>> Hi Matthias,
>> Thanks for setting up the upgrade path.
>>
>> +1 (non-binding)
>>
>> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax <
>> matth...@confluent.io>
>> wrote:
>>
>>> Hi,
>>>
>>> I would like to start the vote for KIP-268:
>>>
>>> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
>>> 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
>>>
>>> PR https://github.com/apache/kafka/pull/4636 contains the fixes to
>>> upgrade from metadata version 1 to 2. Some tests are still missing
>> but
>>> I'll add them asap.
>>>
>>> For "version probing" including new metadata version 3 I plan to do a
>>> follow-up PR after PR-4636 is merged.
>>>
>>>
>>> -Matthias
>>>
>>>
>>
>
>>
>>
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-26 Thread Matthias J. Sax 
Thanks Ted for pointing out.

Sorry for this mistake Zhenya. You should not have voted twice though ;)

(Even if it was the same email address, so I could have figured this out
by myself -- did not pay close enough attention.)

No bid deal. The KIP is accepted with +6/+3 votes than.


-Matthias

On 3/26/18 12:54 PM, Ted Yu wrote:
> Congratulations.
> 
> BTW I believe 孙振亚 and Zhenya is the same person - Zhenya is the PinYin of 振亚
> 
> Cheers
> 
> On Mon, Mar 26, 2018 at 12:51 PM, Matthias J. Sax 
> wrote:
> 
>> +1 (binding)
>>
>>
>> I am also cloeing this vote. The KIP is accepted with
>>
>> +7 non-binding (Richard, Ted, 孙振亚, Bill, James, John, Zhenya)
>> +3 binding (Damian, Guozhang, Matthias)
>>
>> votes.
>>
>>
>> Thanks a lot!
>>
>>
>> -Matthias
>>
>>
>> On 3/22/18 4:13 PM, zhenya Sun wrote:
>>> +1
>>>
>>>
>>> | |
>>> zhenya Sun
>>> 邮箱：toke...@126.com
>>> |
>>>
>>> 签名由 网易邮箱大师 定制
>>>
>>> On 03/23/2018 03:34, James Cheng wrote:
>>> +1 (non-binding)
>>>
>>> -James
>>>
 On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:

 +1

 On Wed, 21 Mar 2018 at 01:44 abel-sun 
>> wrote:

>
>   Thanks you of your offer ,agree with you!
>
> On 2018/03/21 00:56:11, Richard Yu  wrote:
>> Hi Matthias,
>> Thanks for setting up the upgrade path.
>>
>> +1 (non-binding)
>>
>> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax <
>> matth...@confluent.io>
>> wrote:
>>
>>> Hi,
>>>
>>> I would like to start the vote for KIP-268:
>>>
>>> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
>>> 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
>>>
>>> PR https://github.com/apache/kafka/pull/4636 contains the fixes to
>>> upgrade from metadata version 1 to 2. Some tests are still missing
>> but
>>> I'll add them asap.
>>>
>>> For "version probing" including new metadata version 3 I plan to do a
>>> follow-up PR after PR-4636 is merged.
>>>
>>>
>>> -Matthias
>>>
>>>
>>
>
>>
>>
> 



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Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-26 Thread Matthias J. Sax 
Thanks Ted for pointing out.

Sorry for this mistake Zhenya. You should not have voted twice though ;)

(Even if it was the same email address, so I could have figured this out
by myself -- did not pay close enough attention.)

No bid deal. The KIP is accepted with +6/+3 votes than.


-Matthias

On 3/26/18 12:54 PM, Ted Yu wrote:
> Congratulations.
> 
> BTW I believe 孙振亚 and Zhenya is the same person - Zhenya is the PinYin of 振亚
> 
> Cheers
> 
> On Mon, Mar 26, 2018 at 12:51 PM, Matthias J. Sax 
> wrote:
> 
>> +1 (binding)
>>
>>
>> I am also cloeing this vote. The KIP is accepted with
>>
>> +7 non-binding (Richard, Ted, 孙振亚, Bill, James, John, Zhenya)
>> +3 binding (Damian, Guozhang, Matthias)
>>
>> votes.
>>
>>
>> Thanks a lot!
>>
>>
>> -Matthias
>>
>>
>> On 3/22/18 4:13 PM, zhenya Sun wrote:
>>> +1
>>>
>>>
>>> | |
>>> zhenya Sun
>>> 邮箱：toke...@126.com
>>> |
>>>
>>> 签名由 网易邮箱大师 定制
>>>
>>> On 03/23/2018 03:34, James Cheng wrote:
>>> +1 (non-binding)
>>>
>>> -James
>>>
 On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:

 +1

 On Wed, 21 Mar 2018 at 01:44 abel-sun 
>> wrote:

>
>   Thanks you of your offer ,agree with you!
>
> On 2018/03/21 00:56:11, Richard Yu  wrote:
>> Hi Matthias,
>> Thanks for setting up the upgrade path.
>>
>> +1 (non-binding)
>>
>> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax <
>> matth...@confluent.io>
>> wrote:
>>
>>> Hi,
>>>
>>> I would like to start the vote for KIP-268:
>>>
>>> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
>>> 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
>>>
>>> PR https://github.com/apache/kafka/pull/4636 contains the fixes to
>>> upgrade from metadata version 1 to 2. Some tests are still missing
>> but
>>> I'll add them asap.
>>>
>>> For "version probing" including new metadata version 3 I plan to do a
>>> follow-up PR after PR-4636 is merged.
>>>
>>>
>>> -Matthias
>>>
>>>
>>
>
>>
>>
> 



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Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-26 Thread Ted Yu 
Congratulations.

BTW I believe 孙振亚 and Zhenya is the same person - Zhenya is the PinYin of 振亚

Cheers

On Mon, Mar 26, 2018 at 12:51 PM, Matthias J. Sax 
wrote:

> +1 (binding)
>
>
> I am also cloeing this vote. The KIP is accepted with
>
> +7 non-binding (Richard, Ted, 孙振亚, Bill, James, John, Zhenya)
> +3 binding (Damian, Guozhang, Matthias)
>
> votes.
>
>
> Thanks a lot!
>
>
> -Matthias
>
>
> On 3/22/18 4:13 PM, zhenya Sun wrote:
> > +1
> >
> >
> > | |
> > zhenya Sun
> > 邮箱：toke...@126.com
> > |
> >
> > 签名由 网易邮箱大师 定制
> >
> > On 03/23/2018 03:34, James Cheng wrote:
> > +1 (non-binding)
> >
> > -James
> >
> >> On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:
> >>
> >> +1
> >>
> >> On Wed, 21 Mar 2018 at 01:44 abel-sun 
> wrote:
> >>
> >>>
> >>>   Thanks you of your offer ,agree with you!
> >>>
> >>> On 2018/03/21 00:56:11, Richard Yu  wrote:
>  Hi Matthias,
>  Thanks for setting up the upgrade path.
> 
>  +1 (non-binding)
> 
>  On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax <
> matth...@confluent.io>
>  wrote:
> 
> > Hi,
> >
> > I would like to start the vote for KIP-268:
> >
> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> >
> > PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> > upgrade from metadata version 1 to 2. Some tests are still missing
> but
> > I'll add them asap.
> >
> > For "version probing" including new metadata version 3 I plan to do a
> > follow-up PR after PR-4636 is merged.
> >
> >
> > -Matthias
> >
> >
> 
> >>>
>
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-26 Thread Matthias J. Sax 
+1 (binding)


I am also cloeing this vote. The KIP is accepted with

+7 non-binding (Richard, Ted, 孙振亚, Bill, James, John, Zhenya)
+3 binding (Damian, Guozhang, Matthias)

votes.


Thanks a lot!


-Matthias


On 3/22/18 4:13 PM, zhenya Sun wrote:
> +1
> 
> 
> | |
> zhenya Sun
> 邮箱：toke...@126.com
> |
> 
> 签名由 网易邮箱大师 定制
> 
> On 03/23/2018 03:34, James Cheng wrote:
> +1 (non-binding)
> 
> -James
> 
>> On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:
>>
>> +1
>>
>> On Wed, 21 Mar 2018 at 01:44 abel-sun  wrote:
>>
>>>
>>>   Thanks you of your offer ,agree with you!
>>>
>>> On 2018/03/21 00:56:11, Richard Yu  wrote:
 Hi Matthias,
 Thanks for setting up the upgrade path.

 +1 (non-binding)

 On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
 wrote:

> Hi,
>
> I would like to start the vote for KIP-268:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
>
> PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> upgrade from metadata version 1 to 2. Some tests are still missing but
> I'll add them asap.
>
> For "version probing" including new metadata version 3 I plan to do a
> follow-up PR after PR-4636 is merged.
>
>
> -Matthias
>
>

>>>



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Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-22 Thread zhenya Sun 
+1


| |
zhenya Sun
邮箱：toke...@126.com
|

签名由 网易邮箱大师 定制

On 03/23/2018 03:34, James Cheng wrote:
+1 (non-binding)

-James

> On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:
>
> +1
>
> On Wed, 21 Mar 2018 at 01:44 abel-sun  wrote:
>
>>
>>   Thanks you of your offer ,agree with you!
>>
>> On 2018/03/21 00:56:11, Richard Yu  wrote:
>>> Hi Matthias,
>>> Thanks for setting up the upgrade path.
>>>
>>> +1 (non-binding)
>>>
>>> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
>>> wrote:
>>>
 Hi,

 I would like to start the vote for KIP-268:

 https://cwiki.apache.org/confluence/display/KAFKA/KIP-
 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade

 PR https://github.com/apache/kafka/pull/4636 contains the fixes to
 upgrade from metadata version 1 to 2. Some tests are still missing but
 I'll add them asap.

 For "version probing" including new metadata version 3 I plan to do a
 follow-up PR after PR-4636 is merged.


 -Matthias


>>>
>>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-22 Thread Guozhang Wang 
Thanks Matthias for the detailed plan of implementation.

As people seem to agree on keeping the upgrade.from config to avoid
enforcing to upgrades via 1.2, I'm +1 on the proposal.



Guozhang

On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
wrote:

> Hi,
>
> I would like to start the vote for KIP-268:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
>
> PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> upgrade from metadata version 1 to 2. Some tests are still missing but
> I'll add them asap.
>
> For "version probing" including new metadata version 3 I plan to do a
> follow-up PR after PR-4636 is merged.
>
>
> -Matthias
>
>


-- 
-- Guozhang

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-22 Thread John Roesler 
+1 (non-binding)

On Thu, Mar 22, 2018 at 2:34 PM, James Cheng  wrote:

> +1 (non-binding)
>
> -James
>
> > On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:
> >
> > +1
> >
> > On Wed, 21 Mar 2018 at 01:44 abel-sun 
> wrote:
> >
> >>
> >>   Thanks you of your offer ,agree with you!
> >>
> >> On 2018/03/21 00:56:11, Richard Yu  wrote:
> >>> Hi Matthias,
> >>> Thanks for setting up the upgrade path.
> >>>
> >>> +1 (non-binding)
> >>>
> >>> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax <
> matth...@confluent.io>
> >>> wrote:
> >>>
>  Hi,
> 
>  I would like to start the vote for KIP-268:
> 
>  https://cwiki.apache.org/confluence/display/KAFKA/KIP-
>  268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> 
>  PR https://github.com/apache/kafka/pull/4636 contains the fixes to
>  upgrade from metadata version 1 to 2. Some tests are still missing but
>  I'll add them asap.
> 
>  For "version probing" including new metadata version 3 I plan to do a
>  follow-up PR after PR-4636 is merged.
> 
> 
>  -Matthias
> 
> 
> >>>
> >>
>
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-22 Thread James Cheng 
+1 (non-binding)

-James

> On Mar 21, 2018, at 2:28 AM, Damian Guy  wrote:
> 
> +1
> 
> On Wed, 21 Mar 2018 at 01:44 abel-sun  wrote:
> 
>> 
>>   Thanks you of your offer ,agree with you!
>> 
>> On 2018/03/21 00:56:11, Richard Yu  wrote:
>>> Hi Matthias,
>>> Thanks for setting up the upgrade path.
>>> 
>>> +1 (non-binding)
>>> 
>>> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
>>> wrote:
>>> 
 Hi,
 
 I would like to start the vote for KIP-268:
 
 https://cwiki.apache.org/confluence/display/KAFKA/KIP-
 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
 
 PR https://github.com/apache/kafka/pull/4636 contains the fixes to
 upgrade from metadata version 1 to 2. Some tests are still missing but
 I'll add them asap.
 
 For "version probing" including new metadata version 3 I plan to do a
 follow-up PR after PR-4636 is merged.
 
 
 -Matthias
 
 
>>> 
>>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-21 Thread Damian Guy 
+1

On Wed, 21 Mar 2018 at 01:44 abel-sun  wrote:

>
>Thanks you of your offer ,agree with you!
>
> On 2018/03/21 00:56:11, Richard Yu  wrote:
> > Hi Matthias,
> > Thanks for setting up the upgrade path.
> >
> > +1 (non-binding)
> >
> > On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
> > wrote:
> >
> > > Hi,
> > >
> > > I would like to start the vote for KIP-268:
> > >
> > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > > 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> > >
> > > PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> > > upgrade from metadata version 1 to 2. Some tests are still missing but
> > > I'll add them asap.
> > >
> > > For "version probing" including new metadata version 3 I plan to do a
> > > follow-up PR after PR-4636 is merged.
> > >
> > >
> > > -Matthias
> > >
> > >
> >
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-20 Thread 孙振亚 
+1

On 2018/03/21 01:23:33, Ted Yu  wrote: 
> +1
> 
> On Tue, Mar 20, 2018 at 5:56 PM, Richard Yu 
> wrote:
> 
> > Hi Matthias,
> > Thanks for setting up the upgrade path.
> >
> > +1 (non-binding)
> >
> > On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
> > wrote:
> >
> > > Hi,
> > >
> > > I would like to start the vote for KIP-268:
> > >
> > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > > 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> > >
> > > PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> > > upgrade from metadata version 1 to 2. Some tests are still missing but
> > > I'll add them asap.
> > >
> > > For "version probing" including new metadata version 3 I plan to do a
> > > follow-up PR after PR-4636 is merged.
> > >
> > >
> > > -Matthias
> > >
> > >
> >
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-20 Thread abel-sun 

   Thanks you of your offer ,agree with you!

On 2018/03/21 00:56:11, Richard Yu  wrote: 
> Hi Matthias,
> Thanks for setting up the upgrade path.
> 
> +1 (non-binding)
> 
> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
> wrote:
> 
> > Hi,
> >
> > I would like to start the vote for KIP-268:
> >
> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> >
> > PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> > upgrade from metadata version 1 to 2. Some tests are still missing but
> > I'll add them asap.
> >
> > For "version probing" including new metadata version 3 I plan to do a
> > follow-up PR after PR-4636 is merged.
> >
> >
> > -Matthias
> >
> >
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-20 Thread Bill Bejeck 
+1

Thanks,
Bill

On Tue, Mar 20, 2018 at 9:23 PM, Ted Yu  wrote:

> +1
>
> On Tue, Mar 20, 2018 at 5:56 PM, Richard Yu 
> wrote:
>
> > Hi Matthias,
> > Thanks for setting up the upgrade path.
> >
> > +1 (non-binding)
> >
> > On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
> > wrote:
> >
> > > Hi,
> > >
> > > I would like to start the vote for KIP-268:
> > >
> > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > > 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> > >
> > > PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> > > upgrade from metadata version 1 to 2. Some tests are still missing but
> > > I'll add them asap.
> > >
> > > For "version probing" including new metadata version 3 I plan to do a
> > > follow-up PR after PR-4636 is merged.
> > >
> > >
> > > -Matthias
> > >
> > >
> >
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-20 Thread Ted Yu 
+1

On Tue, Mar 20, 2018 at 5:56 PM, Richard Yu 
wrote:

> Hi Matthias,
> Thanks for setting up the upgrade path.
>
> +1 (non-binding)
>
> On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
> wrote:
>
> > Hi,
> >
> > I would like to start the vote for KIP-268:
> >
> > https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> > 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
> >
> > PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> > upgrade from metadata version 1 to 2. Some tests are still missing but
> > I'll add them asap.
> >
> > For "version probing" including new metadata version 3 I plan to do a
> > follow-up PR after PR-4636 is merged.
> >
> >
> > -Matthias
> >
> >
>

Re: [VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-20 Thread Richard Yu 
Hi Matthias,
Thanks for setting up the upgrade path.

+1 (non-binding)

On Tue, Mar 20, 2018 at 3:42 PM, Matthias J. Sax 
wrote:

> Hi,
>
> I would like to start the vote for KIP-268:
>
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-
> 268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade
>
> PR https://github.com/apache/kafka/pull/4636 contains the fixes to
> upgrade from metadata version 1 to 2. Some tests are still missing but
> I'll add them asap.
>
> For "version probing" including new metadata version 3 I plan to do a
> follow-up PR after PR-4636 is merged.
>
>
> -Matthias
>
>

[VOTE] KIP-268: Simplify Kafka Streams Rebalance Metadata Upgrade

2018-03-20 Thread Matthias J. Sax 
Hi,

I would like to start the vote for KIP-268:

https://cwiki.apache.org/confluence/display/KAFKA/KIP-268%3A+Simplify+Kafka+Streams+Rebalance+Metadata+Upgrade

PR https://github.com/apache/kafka/pull/4636 contains the fixes to
upgrade from metadata version 1 to 2. Some tests are still missing but
I'll add them asap.

For "version probing" including new metadata version 3 I plan to do a
follow-up PR after PR-4636 is merged.


-Matthias



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