hachikuji commented on a change in pull request #8509:
URL: https://github.com/apache/kafka/pull/8509#discussion_r413091037
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File path: core/src/main/scala/kafka/server/KafkaApis.scala
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@@ -3084,12 +3084,7 @@ class KafkaApis(val requestChannel: RequestChannel,
// Broker epoch in LeaderAndIsr/UpdateMetadata/StopReplica request is
unknown
// if the controller hasn't been upgraded to use KIP-380
if (brokerEpochInRequest == AbstractControlRequest.UNKNOWN_BROKER_EPOCH)
false
- else {
- val curBrokerEpoch = controller.brokerEpoch
- if (brokerEpochInRequest < curBrokerEpoch) true
- else if (brokerEpochInRequest == curBrokerEpoch) false
- else throw new IllegalStateException(s"Epoch $brokerEpochInRequest
larger than current broker epoch $curBrokerEpoch")
- }
+ else brokerEpochInRequest < controller.brokerEpoch
Review comment:
Short comment here may be helpful about the case where the controller
sees the epoch bump first.
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