Author: Manikumar Reddy <manikumar.reddy@gmail.com>
Reviewers: Ismael Juma <ismael@juma.me.uk>, Magnus Edenhill <magnus@edenhill.se>, Colin Patrick McCabe <cmccabe@apache.org>
Closes#7818 from omkreddy/zk-note
ZK upgrade from 3.4.X to 3.5.6 fails with "java.io.IOException: No snapshot found" if there are no snapshot files. This was discussed in https://issues.apache.org/jira/browse/ZOOKEEPER-3056
Author: Manikumar Reddy <manikumar.reddy@gmail.com>
Reviewers: Ismael Juma <ismael@juma.me.uk>
Closes#7625 from omkreddy/zk-upgrade
Kafka ships with default ZK configuration. With the upgrade to ZK 3.5, our defaults include running ZK's AdminServer on port 8080. This is an unfortunate default as it tends to cause conflicts.
I suggest we default to disable ZK's AdminServer in the default ZK configs that we ship. Users who want to use AdminServer can enable it and set the port to something that works for them. Realistically, in most production environments, a different ZK server will be used anyway. So this is mostly to save new users who are trying Kafka on their own machine from running into accidental and frustrating port conflicts.
Author: Gwen Shapira <gwen@confluent.io>
Reviewers: Ismael Juma
Closes#7203 from gwenshap/zk_disable_adminserver
Manikumar Reddy
Gwen Shapira
Neha Narkhede
Jun Rao
Edward Jay Kreps