stanislavkozlovski commented on code in PR #586:
URL: https://github.com/apache/kafka-site/pull/586#discussion_r1500034521
##########
36/upgrade.html:
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@@ -214,10 +214,8 @@ <h5><a id="upgrade_350_kraft"
href="#upgrade_350_kraft">Upgrading KRaft-based cl
./bin/kafka-features.sh upgrade --metadata 3.5
</code>
</li>
- <li>Note that cluster metadata downgrade is not supported in this
version since it has metadata changes.
- Every <a
href="https://github.com/apache/kafka/blob/trunk/server-common/src/main/java/org/apache/kafka/server/common/MetadataVersion.java";>MetadataVersion</a>
- after 3.2.x has a boolean parameter that indicates if there are
metadata changes (i.e. <code>IBP_3_3_IV3(7, "3.3", "IV3", true)</code> means
this version has metadata changes).
- Given your current and target versions, a downgrade is only
possible if there are no metadata changes in the versions between.</li>
+ <li>Note that the cluster metadata version cannot be downgraded to a
pre-production 3.0.x, 3.1.x, or 3.2.x version once it has been upgraded.
Review Comment:
ok so this was fixed in 3.7+ onwards for the old versions with
https://github.com/apache/kafka/commit/aec07f76d763068feb6c1d19e4fc326cffd9c620
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