junrao commented on code in PR #13535:
URL: https://github.com/apache/kafka/pull/13535#discussion_r1196786120
##########
core/src/main/scala/kafka/server/ReplicaManager.scala:
##########
@@ -1175,49 +1260,78 @@ class ReplicaManager(val config: KafkaConfig,
fetchPartitionStatus += (topicIdPartition ->
FetchPartitionStatus(logOffsetMetadata, partitionData))
})
}
- val delayedFetch = new DelayedFetch(
- params = params,
- fetchPartitionStatus = fetchPartitionStatus,
- replicaManager = this,
- quota = quota,
- responseCallback = responseCallback
- )
-
- // create a list of (topic, partition) pairs to use as keys for this
delayed fetch operation
- val delayedFetchKeys = fetchPartitionStatus.map { case (tp, _) =>
TopicPartitionOperationKey(tp) }
-
- // try to complete the request immediately, otherwise put it into the
purgatory;
- // this is because while the delayed fetch operation is being created,
new requests
- // may arrive and hence make this operation completable.
- delayedFetchPurgatory.tryCompleteElseWatch(delayedFetch,
delayedFetchKeys)
+
+ if (remoteFetchInfo.isPresent) {
+ val maybeLogReadResultWithError =
processRemoteFetch(remoteFetchInfo.get(), params, responseCallback,
logReadResults, fetchPartitionStatus)
+ if(maybeLogReadResultWithError.isDefined) {
Review Comment:
space after `if `
##########
core/src/main/scala/kafka/server/ReplicaManager.scala:
##########
@@ -1175,49 +1260,78 @@ class ReplicaManager(val config: KafkaConfig,
fetchPartitionStatus += (topicIdPartition ->
FetchPartitionStatus(logOffsetMetadata, partitionData))
})
}
- val delayedFetch = new DelayedFetch(
- params = params,
- fetchPartitionStatus = fetchPartitionStatus,
- replicaManager = this,
- quota = quota,
- responseCallback = responseCallback
- )
-
- // create a list of (topic, partition) pairs to use as keys for this
delayed fetch operation
- val delayedFetchKeys = fetchPartitionStatus.map { case (tp, _) =>
TopicPartitionOperationKey(tp) }
-
- // try to complete the request immediately, otherwise put it into the
purgatory;
- // this is because while the delayed fetch operation is being created,
new requests
- // may arrive and hence make this operation completable.
- delayedFetchPurgatory.tryCompleteElseWatch(delayedFetch,
delayedFetchKeys)
+
+ if (remoteFetchInfo.isPresent) {
+ val maybeLogReadResultWithError =
processRemoteFetch(remoteFetchInfo.get(), params, responseCallback,
logReadResults, fetchPartitionStatus)
+ if(maybeLogReadResultWithError.isDefined) {
+ // If there is an error in scheduling the remote fetch task, return
what we currently have
+ // (the data read from local log segment for the other
topic-partitions) and an error for the topic-partition
+ // that we couldn't read from remote storage
+ val partitionToFetchPartitionData =
buildPartitionToFetchPartitionData(logReadResults,
remoteFetchInfo.get().topicPartition, maybeLogReadResultWithError.get)
+ responseCallback(partitionToFetchPartitionData)
+ return
Review Comment:
It seems that `return` is unnecessary here?
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