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https://issues.apache.org/jira/browse/ZOOKEEPER-2879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16137380#comment-16137380
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Michael Han commented on ZOOKEEPER-2879:
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That's true. Additional constraints can be put to solve those though (forbid
promote operations and forbid client migration between servers when reconnect).
But I am just guessing here. Let's wait for [~lvfangmin] to clarify what kind
of use cases he has with this feature.
> Adding observers dynamically without server id
> ----------------------------------------------
>
> Key: ZOOKEEPER-2879
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2879
> Project: ZooKeeper
> Issue Type: Improvement
> Components: quorum
> Affects Versions: 3.6.0
> Reporter: Fangmin Lv
> Assignee: Fangmin Lv
>
> Dynamic config requires observer has unique server id, which means we cannot
> simply add observer with dynamic server id -1. For large observer cluster,
> it's much more easier to add observer without unique server id if it doesn't
> need to be promoted to participant. Also, it will make dynamic config more
> efficient, we don't need to store and send the long list of observers during
> re-config.
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