Hi Ismael, Mostly to avoid the protocol bump.
I agree that it may be difficult to choose the right delay for all consumer groups, but we wanted to make this something that most users don't really need to think about, i.e., a small enough default delay that works in the majority of cases. However it would be much more flexible as a consumer config, which i'm happy to pursue if this change is worthy of a protocol bump. Thanks, Damian On Thu, 23 Mar 2017 at 12:35 Ismael Juma <ism...@juma.me.uk> wrote: > Thanks for the KIP, Damian. It makes sense to avoid multiple rebalances > during start-up. One issue with having this as a broker config is that it > may be difficult to choose the right delay for all consumer groups. Can you > elaborate a little more on why the first alternative (add a consumer > config) was rejected? We bump protocol versions regularly (when it makes > sense), so it would be good to get a bit more detail. > > Thanks, > Ismael > > On Thu, Mar 23, 2017 at 12:24 PM, Damian Guy <damian....@gmail.com> wrote: > > > Hi All, > > > > I've prepared a KIP to add a configurable delay to the initial consumer > > group rebalance. > > > > Please have look here: > > https://cwiki.apache.org/confluence/display/KAFKA/KIP- > > 134%3A+Delay+initial+consumer+group+rebalance > > > > Thanks, > > Damian > > > > BTW, i apologize if this appears twice. Seems the first one may have not > > made it. > > >
