Starting to deprecate the old consumer in the next release seems like a good idea.
Thanks, Jun On Tue, Oct 25, 2016 at 2:45 AM, Ismael Juma <ism...@juma.me.uk> wrote: > Hi all, > > In 0.10.1.0, we removed the beta label from the new Java consumer > documentation and updated the various tools so that they can use the new > consumer without having to pass the `--new-consumer` flag (more > specifically the new consumer is used if `bootstrap-server` is set). More > details of the reasoning can be found in the original discuss thread: > http://search-hadoop.com/m/Kafka/uyzND1e4bUP1Rjq721 > > The old consumers don't have security or `offsetsForTimestamp` (KIP-79) > support and the plan is to only add features to the new Java consumer. Even > so, the old consumers are a significant maintenance burden as they > duplicate protocol request/response classes (the SimpleConsumer exposes > them in the public API sadly). I experienced this first hand most recently > while working on KIP-74. > > Given the above, I propose we deprecate the old consumers in trunk to nudge > users in the right direction. Users will have the 0.10.1.0 cycle to start > migrating to the new Java consumer with no build warnings. Once they > upgrade to the next release (i.e. 0.10.2.0), users who are still using the > old consumers will get warnings at build time encouraging them to move to > the new consumer, but everything will still work fine. > > In a future major release, the old consumers (along with the old producers) > will be removed. We will have a separate discuss/vote thread for that to > make sure the time is right. > > Thoughts? > > Ismael >
