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https://issues.apache.org/jira/browse/ZOOKEEPER-1727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Shraer resolved ZOOKEEPER-1727.
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Resolution: Duplicate
Fix Version/s: 3.5.0
Assignee: Alexander Shraer
> Doc request: The right way to expand a cluster
> ----------------------------------------------
>
> Key: ZOOKEEPER-1727
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1727
> Project: ZooKeeper
> Issue Type: Wish
> Affects Versions: 3.5.0
> Reporter: Justin SB
> Assignee: Alexander Shraer
> Priority: Minor
> Fix For: 3.5.0
>
>
> When expanding a cluster from 2->3, if ZK server #3 isn't up yet, then it
> seems that the reconfig request times out with a connection-loss error. The
> configuration is updated though. So we could wait, reconnect, and then
> refetch the config to make sure we did join the quorum, though that seems a
> little bit hacky!
> What is correct way to do this (and cluster growth in general)? Should we
> bring up new ZK servers before issuing the reconfig command? What is the
> right way to bring up new ZK servers (connect as a client, request the
> config, save the config to the zk.conf.dynamic file, add our new server line
> to the new zk.conf.dynamic file, start the new server, call reconfig as a
> client to the existing cluster)?
> Is this documented anywhere? (Just the steps to do it "the right way" would
> be great, no need for actual code) :-)
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