Ok I'll create a JIRA issue on this. Thanks!
2016-01-23 21:47 GMT+01:00 Bruno Rassaerts <bruno.rassae...@novazone.be>: > +1 here > > As a workaround we seek to the current offset which resets the current > clients internal states and everything continues. > > Regards, > Bruno Rassaerts | Freelance Java Developer > > Novazone, Edingsesteenweg 302, B-1755 Gooik, Belgium > T: +32(0)54/26.02.03 - M:+32(0)477/39.01.15 > bruno.rassae...@novazone.be -www.novazone.be > > > On 23 Jan 2016, at 17:52, Ismael Juma <ism...@juma.me.uk> wrote: > > > > Hi, > > > > Can you please file an issue in JIRA so that we make sure this is > > investigated? > > > > Ismael > > > >> On Fri, Jan 22, 2016 at 3:13 PM, Han JU <ju.han.fe...@gmail.com> wrote: > >> > >> Hi, > >> > >> I'm prototyping with the new consumer API of kafka 0.9 and I'm > particularly > >> interested in the `ConsumerRebalanceListener`. > >> > >> My test setup is like the following: > >> - 5M messages pre-loaded in one node kafka 0.9 > >> - 12 partitions, auto offset commit set to false > >> - in `onPartitionsRevoked`, commit offset and flush the local state > >> > >> The test run is like the following: > >> - launch one process with 2 consumers and let it consume for a while > >> - launch another process with 2 consumers, this triggers a rebalancing, > >> and let these 2 processes run until messages are all consumed > >> > >> The code is here: https://gist.github.com/darkjh/fe1e5a5387bf13b4d4dd > >> > >> So at first, the 2 consumers of the first process each got 6 partitions. > >> And after the rebalancing, each consumer got 3 partitions. It's > confirmed > >> by logging inside the `onPartitionAssigned` callback. > >> > >> But after the rebalancing, one of the 2 consumers of the first process > stop > >> receiving messages, even if it has partitions assigned to: > >> > >> balance-1 pulled 7237 msgs ... > >> balance-0 pulled 7263 msgs ... > >> 2016-01-22 15:50:37,533 [INFO] [pool-1-thread-2] > >> o.a.k.c.c.i.AbstractCoordinator - Attempt to heart beat failed since the > >> group is rebalancing, try to re-join group. > >> balance-1 flush @ 536637 > >> balance-1 committed offset for List(balance-11, balance-10, balance-9, > >> balance-8, balance-7, balance-6) > >> 2016-01-22 15:50:37,575 [INFO] [pool-1-thread-1] > >> o.a.k.c.c.i.AbstractCoordinator - Attempt to heart beat failed since the > >> group is rebalancing, try to re-join group. > >> balance-0 flush @ 543845 > >> balance-0 committed offset for List(balance-5, balance-4, balance-3, > >> balance-2, balance-1, balance-0) > >> balance-0 got assigned List(balance-5, balance-4, balance-3) > >> balance-1 got assigned List(balance-11, balance-10, balance-9) > >> balance-1 pulled 3625 msgs ... > >> balance-0 pulled 3621 msgs ... > >> balance-0 pulled 3631 msgs ... > >> balance-0 pulled 3631 msgs ... > >> balance-1 pulled 0 msgs ... > >> balance-0 pulled 3643 msgs ... > >> balance-0 pulled 3643 msgs ... > >> balance-1 pulled 0 msgs ... > >> balance-0 pulled 3622 msgs ... > >> balance-0 pulled 3632 msgs ... > >> balance-1 pulled 0 msgs ... > >> balance-0 pulled 3637 msgs ... > >> balance-0 pulled 3641 msgs ... > >> balance-0 pulled 3640 msgs ... > >> balance-1 pulled 0 msgs ... > >> balance-0 pulled 3632 msgs ... > >> balance-0 pulled 3630 msgs ... > >> balance-1 pulled 0 msgs ... > >> ...... > >> > >> `balance-0` and `balance-1` are the names of the consumer thread. So > after > >> the rebalancing, thread `balance-1` continues to poll but no message > >> arrive, given that it has got 3 partitions assigned to after the > >> rebalancing. > >> > >> Finally other 3 consumers pulls all their partitions' message, the > >> situation is like > >> > >> GROUP, TOPIC, PARTITION, CURRENT OFFSET, LOG END OFFSET, LAG, OWNER > >> balance-test, balance, 9, 417467, 417467, 0, consumer-2_/127.0.0.1 > >> balance-test, balance, 10, 417467, 417467, 0, consumer-2_/127.0.0.1 > >> balance-test, balance, 11, 417467, 417467, 0, consumer-2_/127.0.0.1 > >> balance-test, balance, 6, 180269, 417467, 237198, consumer-2_/127.0.0.1 > >> balance-test, balance, 7, 180036, 417468, 237432, consumer-2_/127.0.0.1 > >> balance-test, balance, 8, 180197, 417467, 237270, consumer-2_/127.0.0.1 > >> balance-test, balance, 3, 417467, 417467, 0, consumer-1_/127.0.0.1 > >> balance-test, balance, 4, 417468, 417468, 0, consumer-1_/127.0.0.1 > >> balance-test, balance, 5, 417468, 417468, 0, consumer-1_/127.0.0.1 > >> balance-test, balance, 0, 417467, 417467, 0, consumer-1_/127.0.0.1 > >> balance-test, balance, 1, 417467, 417467, 0, consumer-1_/127.0.0.1 > >> balance-test, balance, 2, 417467, 417467, 0, consumer-1_/127.0.0.1 > >> > >> So you can see, partition [6, 7, 8] still has messages, but the consumer > >> can't pull them after the rebalancing. > >> > >> I've tried 0.9.0.0 release, trunk and 0.9.0 branch, for both > server/broker > >> and client. > >> > >> I hope the code is clear enough to illustrate/reproduce the problem. > It's > >> quite a surprise for me because this is the main feature of the new > >> consumer API, but it does not seem to work properly. > >> Feel free to talk to me for any details. > >> -- > >> *JU Han* > >> > >> Software Engineer @ Teads.tv > >> > >> +33 0619608888 > >> > -- *JU Han* Software Engineer @ Teads.tv +33 0619608888
