showuon commented on code in PR #21025:
URL: https://github.com/apache/kafka/pull/21025#discussion_r2583509801
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docs/upgrade.html:
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@@ -176,7 +176,8 @@ <h5><a id="upgrade_420_notable"
href="#upgrade_420_notable">Notable changes in 4
</li>
<li>
The <code>controller.quorum.auto.join.enable</code> has been added to
<code>QuorumConfig</code>, enabling KRaft controllers to automatically join the
cluster's voter set,
- and defaults to false.
+ and defaults to false. There is an issue which is KRaft voter auto
join will add a removed voter immediately,
+ please see <a
href="https://issues.apache.org/jira/browse/KAFKA-19850";>KAFKA-19850</a>
Review Comment:
I would avoid to call it as an `issue` since we agree it works as expected.
Maybe we can update it as:
`If the configuration is set to true the controller must be shutdown before
removing the controller from the voter set to avoid the removed controller to
automatically join again.`
WDYT?
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