There are a bunch of new features added in 0.9 plus quite a lot of bug fixes as well, a complete ticket list can be found here:
https://issues.apache.org/jira/browse/KAFKA-1686?jql=project%20%3D%20KAFKA%20AND%20fixVersion%20%3D%200.9.0.0%20ORDER%20BY%20updated%20DESC In a short summary of the new features, 0.9 introduces: 1) security and quota management on the brokers. 2) new Java consumer. 3) copycat framework for ingress / egress of Kafka. Guozhang On Tue, Oct 20, 2015 at 4:32 PM, Mohit Anchlia <mohitanch...@gmail.com> wrote: > Thanks. Are there any other major changes in .9 release other than the > Consumer changes. Should I wait for .9 or go ahead and performance test > with .8? > > On Tue, Oct 20, 2015 at 3:54 PM, Guozhang Wang <wangg...@gmail.com> wrote: > > > We will have a release document for that on the release date, it is not > > complete yet. > > > > Guozhang > > > > On Tue, Oct 20, 2015 at 3:18 PM, Mohit Anchlia <mohitanch...@gmail.com> > > wrote: > > > > > Is there a wiki page where I can find all the major design changes in > > > 0.9.0? > > > > > > On Mon, Oct 19, 2015 at 4:24 PM, Guozhang Wang <wangg...@gmail.com> > > wrote: > > > > > > > It is not released yet, we are shooting for Nov. for 0.9.0. > > > > > > > > Guozhang > > > > > > > > On Mon, Oct 19, 2015 at 4:08 PM, Mohit Anchlia < > mohitanch...@gmail.com > > > > > > > wrote: > > > > > > > > > Is 0.9.0 still under development? I don't see it here: > > > > > http://kafka.apache.org/downloads.html > > > > > > > > > > On Mon, Oct 19, 2015 at 4:05 PM, Guozhang Wang <wangg...@gmail.com > > > > > > wrote: > > > > > > > > > > > The links you are referring are for the old consumer. > > > > > > > > > > > > If you are using the ZooKeeper based high-level version of the > old > > > > > consumer > > > > > > which is described in the second link, then failures are handled > > and > > > > > > abstracted from you so that if there is a failure in the current > > > > process, > > > > > > its fetching partitions will be re-assigned to other consumers > > within > > > > the > > > > > > same group starting at the last checkpointed offset. And offsets > > can > > > be > > > > > > either checkpointed periodically or manually throw > > consumer.commit() > > > > > calls. > > > > > > > > > > > > BTW, in the coming 0.9.0 release there is a new consumer written > in > > > > Java > > > > > > which uses a poll() based API instead of a stream iterating API. > > More > > > > > > details can be found here in case you are interested in trying it > > > out: > > > > > > > > > > > > > > > > > > > > > > > > > > > https://cwiki.apache.org/confluence/display/KAFKA/Consumer+Client+Re-Design > > > > > > > > > > > > Guozhang > > > > > > > > > > > > On Mon, Oct 19, 2015 at 2:54 PM, Mohit Anchlia < > > > mohitanch...@gmail.com > > > > > > > > > > > wrote: > > > > > > > > > > > > > By old consumer you mean version < .8? > > > > > > > > > > > > > > Here are the links: > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > https://cwiki.apache.org/confluence/display/KAFKA/0.8.0+SimpleConsumer+Example > > > > > > > > > > > > > > > > https://cwiki.apache.org/confluence/display/KAFKA/Consumer+Group+Example > > > > > > > > > > > > > > On Mon, Oct 19, 2015 at 12:52 PM, Guozhang Wang < > > > wangg...@gmail.com> > > > > > > > wrote: > > > > > > > > > > > > > > > Hi Mohit, > > > > > > > > > > > > > > > > Are you referring to the new Java consumer or the old > consumer? > > > Or > > > > > more > > > > > > > > specifically what examples doc are you referring to? > > > > > > > > > > > > > > > > Guozhang > > > > > > > > > > > > > > > > On Mon, Oct 19, 2015 at 10:01 AM, Mohit Anchlia < > > > > > > mohitanch...@gmail.com> > > > > > > > > wrote: > > > > > > > > > > > > > > > > > I see most of the consumer examples create a while/for loop > > and > > > > > then > > > > > > > > fetch > > > > > > > > > messages iteratively. Is that the only way by which clients > > can > > > > > > > consumer > > > > > > > > > messages? If this is the preferred way then how do you deal > > > with > > > > > > > > failures, > > > > > > > > > exceptions such that messages are not lost. > > > > > > > > > > > > > > > > > > Also, please point me to examples that one would consider > as > > a > > > > > robust > > > > > > > way > > > > > > > > > of coding consumers. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > -- Guozhang > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > -- Guozhang > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > -- Guozhang > > > > > > > > > > > > > > > -- > > -- Guozhang > > > -- -- Guozhang
