hachikuji commented on code in PR #12071:
URL: https://github.com/apache/kafka/pull/12071#discussion_r855395294
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clients/src/main/resources/common/message/LeaderAndIsrRequest.json:
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@@ -78,8 +78,8 @@
"about": "The leader epoch." },
{ "name": "Isr", "type": "[]int32", "versions": "0+", "entityType":
"brokerId",
"about": "The in-sync replica IDs." },
- { "name": "ZkVersion", "type": "int32", "versions": "0+",
- "about": "The ZooKeeper version." },
+ { "name": "PartitionEpoch", "type": "int32", "versions": "0+",
+ "about": "The current epoch for the partition for KRaft controllers.
The current ZK version for the legacy controllers." },
Review Comment:
nit: It does seem a little misleading to mention KRaft here since the
`LeaderAndIsr` API is not used. Maybe we could somehow call that out?
More generally, do you know if there is a good place we can document
assumptions about the partition epoch? Mainly looking for a good place we can
document that it is a monotonically increasing value which is incremented after
every partition change. Maybe `kafka.api.LeaderAndIsr`?
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