We tested Kafka 0.9 with zookeeper_3.4.5+dfsg-1_all.deb on Ubuntu 14.04 Trusty and want to use stable release of kafka_2.11-0.10.1.1 (hope, this has no critical issues) to avoid known producer issues, but, apparently this needs an upgraded ZK 3.4.8+ https://kafka.apache.org/ documentation/#zkversion which is only available in Ubuntu 16.04 Xenial. Manual installation of ZK 3.4.8 deb package in Trusty had dependency failures.
Need help to understand why ZK upgrade is necessary? http://zookeeper.apache.org/releases.html talks about *"The release fixes a critical bug in 3.4.5 that could prevent a server from joining an established ensemble. SeeZooKeeper 3.4.6 Release Notes <http://zookeeper.apache.org/doc/r3.4.6/releasenotes.html> for details"* http://packages.ubuntu.com/source/trusty/zookeeper http://packages.ubuntu.com/xenial/zookeeper https://tracker.debian.org/pkg/zookeeper -- Krishna
