According to the zookeeper home page, the current stable releases are "3.3.6" and "3.4.4".
There seem to be a few interesting bug fixes in the release notes for 3.3.5 & 3.3.6: http://zookeeper.apache.org/doc/r3.3.5/releasenotes.html#changes http://zookeeper.apache.org/doc/r3.3.6/releasenotes.html#changes Notably fixes for: leaking file handles data inconsistencies and unexpired ephemeral nodes after cluster restart shutdown synchronization But, I have not been using kafka long enough to see these issues myself. On Tue, Nov 13, 2012 at 3:29 PM, Neha Narkhede <neha.narkh...@gmail.com>wrote: > > So, there are known api changes that would preclude use of 3.4.x with > > kafka, it sounds like? > > Not really. Zookeeper 3.4.x is backwards compatible. Kafka 0.8 should > still work with any of the stable zookeeper versions out there. Once > ZK 3.4.x is stable, Kafka 0.8 would certainly benefit from the multi > APIs, since instead of doing one write per partition, we can do one > write for all partitions. > > > Is there a notion of a supported version of zookeeper for each kafka > > release? > > Not formally, though this sounds like a good idea. Implicitly, we > consider the zk version we release with as stable. > > > How about upgrading the recommended version for 0.8 at least to the > latest > > 3.3.x (3.3.6)? > > Yes, do you have an idea about any particular bugs that were fixed > post 3.3.4 which could be useful ? > > Thanks, > Neha > > On Tue, Nov 13, 2012 at 9:54 AM, Jason Rosenberg <j...@squareup.com> wrote: > > Ok, > > > > So, there are known api changes that would preclude use of 3.4.x with > > kafka, it sounds like? > > > > Is there a notion of a supported version of zookeeper for each kafka > > release? > > > > How about upgrading the recommended version for 0.8 at least to the > latest > > 3.3.x (3.3.6)? > > > > Jason > > > > > > > > On Tue, Nov 13, 2012 at 8:50 AM, Neha Narkhede <neha.narkh...@gmail.com > >wrote: > > > >> I've been observing the zookeeper mailing list for 3.4.x and haven't > >> found it to be particularly stable. There are still serious issues > >> being reported like leader election failures, ephemeral node deletion. > >> I'm sure they are being fixed and there are many early adopters. But > >> my guess is that we should probably release 0.8 on a proven stable > >> version and look into 3.4.x for Kafka 0.8.1. > >> > >> Thanks, > >> Neha > >> > >> On Tue, Nov 13, 2012 at 6:57 AM, Jun Rao <jun...@gmail.com> wrote: > >> > Jason, > >> > > >> > We are just not sure about the stability of ZK 3.4.4. Does anybody > know? > >> In > >> > fact, some of the features in ZK 3.4.x (like the multi operation) can > >> > improve the availability of Kafka in 0.8. So, we'd like to move to ZK > >> 3.4.4 > >> > if it's been widely used and is stable. > >> > > >> > Thanks, > >> > > >> > Jun > >> > > >> > On Mon, Nov 12, 2012 at 11:30 PM, Jason Rosenberg <j...@squareup.com> > >> wrote: > >> > > >> >> Hi, > >> >> > >> >> I'm wondering if there's a reason kafka currently seems to depend on > >> >> zookeeper 3.3.4. While the current stable version for zookeeper is > >> 3.4.4. > >> >> > >> >> Are there known issues with upgrading to the newer version of > zookeeper? > >> >> > >> >> Jason > >> >> > >> >
