Il mar 3 set 2019, 13:45 Norbert Kalmar <nkal...@cloudera.com.invalid> ha scritto:
> In my opinion we should not fallback to something else if the client wants > a CONTAINER node, which is a new feature in 3.5. > +1 Enrico > This makes ZooKeeper behave kind of unreliable. Client wants a CONTAINER > node, and gets a PERSISTENT one. How should client handle this? > > For me, throwing an error seems more reasonable. And this doesn't brake > backward compatibleness, as if you upgrade your client, you are still able > to do the things you did with previous version. Just not the new feature > stuff. > > Regards, > Norbert > > On Tue, Sep 3, 2019 at 1:22 PM Zili Chen <wander4...@gmail.com> wrote: > > > Well, we cannot make any reasonable fallback from a previous version, > > but isn't it regraded as a break changes? > > > > Best, > > tison. > > > > > > Zili Chen <wander4...@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 <wander4...@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 <an...@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 <wander4...@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 <wander4...@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. > > >>> >> > > >>> > > >>> > > >
