mumrah commented on a change in pull request #9100:
URL: https://github.com/apache/kafka/pull/9100#discussion_r464717171
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File path: core/src/main/scala/kafka/controller/KafkaController.scala
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@@ -1771,6 +1775,127 @@ class KafkaController(val config: KafkaConfig,
}
}
+ // TODO is it okay to pull message classes down into the controller?
+ def alterIsrs(alterIsrRequest: AlterIsrRequestData, callback:
AlterIsrResponseData => Unit): Unit = {
+ //val brokerEpochOpt =
controllerContext.liveBrokerIdAndEpochs.get(alterIsrRequest.brokerId())
+ /*if (brokerEpochOpt.isEmpty) {
+ info(s"Ignoring AlterIsr due to unknown broker
${alterIsrRequest.brokerId()}")
+ // TODO is INVALID_REQUEST a reasonable error here?
+ callback.apply(new
AlterIsrResponseData().setErrorCode(Errors.INVALID_REQUEST.code))
+ return
+ }
+
+ if (!brokerEpochOpt.contains(alterIsrRequest.brokerEpoch())) {
+ info(s"Ignoring AlterIsr due to stale broker epoch
${alterIsrRequest.brokerEpoch()} for broker ${alterIsrRequest.brokerId()}")
+ callback.apply(new
AlterIsrResponseData().setErrorCode(Errors.STALE_BROKER_EPOCH.code))
+ return
+ }*/
+
+ val isrsToAlter = mutable.Map[TopicPartition, LeaderAndIsr]()
+
+ val resp = new AlterIsrResponseData()
+ resp.setTopics(new util.ArrayList())
+
+ alterIsrRequest.topics().forEach(topicReq => {
+ val topicResp = new AlterIsrResponseTopics()
+ .setName(topicReq.name())
+ .setPartitions(new util.ArrayList())
+ resp.topics().add(topicResp)
+
+ topicReq.partitions().forEach(partitionReq => {
+ val partitionResp = new AlterIsrResponsePartitions()
+ .setPartitionIndex(partitionReq.partitionIndex())
+ topicResp.partitions().add(partitionResp)
+
+ // For each partition who's ISR we are altering, let's do some upfront
validation for the broker response
Review comment:
The main rationale for validating in the request handler is so we can
return meaningful partition-level errors to the broker (fenced leader, not
leader or follower, etc). Although, I'm not sure the broker could do anything
useful with these errors since it probably has stale metadata in these cases.
The KIP calls out four partition-level errors. Do we actually need them?
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