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From Zili Chen <wander4...@gmail.com>
Subject Re: Migrate from 3.4.x to 3.5.5
Date Tue, 03 Sep 2019 11:21:57 GMT
Well, we cannot make any reasonable fallback from a previous version,
but isn't it regraded as a break changes?

Best,
tison.


Zili Chen <wander4096@gmail.com> 于2019年9月3日周二 下午7:20写道:

> Hi here,
>
> If I communicate quorums running zk 3.4 with a zk 3.5 client, when I am
> trying to create node in CONTAINER mode the quorums will compliant
> with KeeperException.UnimplementedException.
>
> That is to say, as a client application, if I upgrade zk to 3.5 and then
> make use of this new feature, we doesn't have a fallback when zk server
> version is 3.4 to PERSISTENT or something like that, but just fail with
> an exception. Is it expected? If so, it seems upgrade client side force
> user to upgrade server side also.
>
> Best,
> tison.
>
>
> Zili Chen <wander4096@gmail.com> 于2019年8月26日周一 下午8:47写道:
>
>> Thanks for your insight Andor!
>>
>> I'll checkout the page :-)
>>
>> Best,
>> tison.
>>
>>
>> Andor Molnar <andor@apache.org> 于2019年8月26日周一 下午8:41写道:
>>
>>> Hi Zili,
>>>
>>> There’s no migration guide available for 3.5, because it shouldn’t break
>>> any existing functionality and no need to upgrade the database either.
>>>
>>> I’ve created a wiki page to collect upgrade experiences from users which
>>> could give you some hint if you’re facing problems:
>>> https://cwiki.apache.org/confluence/display/ZOOKEEPER/Upgrade+FAQ
>>>
>>> You can always drop an email here too to get help.
>>>
>>> Andor
>>>
>>>
>>>
>>> > On 2019. Aug 26., at 14:12, Zili Chen <wander4096@gmail.com> wrote:
>>> >
>>> > Detailedly, in Flink community we try to bump ZooKeeper version from
>>> 3.4.10
>>> > to 3.5.5 but without accurate idea about how it would break existing
>>> > systems.
>>> > Mainly we make use of the "client" of ZooKeeper.
>>> >
>>> >
>>> > Zili Chen <wander4096@gmail.com> 于2019年8月26日周一 下午8:02写道:
>>> >
>>> >> Hi,
>>> >>
>>> >> Is there any migration guide for potentially breaking changes and how
>>> to
>>> >> deal with them?
>>> >>
>>> >> Best,
>>> >> tison.
>>> >>
>>>
>>>

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