hachikuji commented on code in PR #14774:
URL: https://github.com/apache/kafka/pull/14774#discussion_r1423294351
##########
core/src/main/scala/kafka/server/ReplicaManager.scala:
##########
@@ -915,64 +975,239 @@ class ReplicaManager(val config: KafkaConfig,
// probably unblock some follower fetch requests since log end
offset has been updated
delayedFetchPurgatory.checkAndComplete(requestKey)
case LeaderHwChange.NONE =>
- // nothing
- }
+ // nothing
}
+ }
}
+ }
- recordConversionStatsCallback(localProduceResults.map { case (k, v) => k
-> v.info.recordValidationStats })
+ /**
+ * Append messages to offsets topic, and wait for them to be replicated to
other replicas;
+ * the callback function will be triggered either when timeout or the
required acks are satisfied;
+ * if the callback function itself is already synchronized on some object
then pass this object to avoid deadlock.
+ * This method should not return until the write to the local log is
completed because updating offsets requires updating
+ * the in-memory and persisted state under a lock together.
+ *
+ * Noted that all pending delayed check operations are stored in a queue.
All callers to ReplicaManager.appendRecords()
+ * are expected to call ActionQueue.tryCompleteActions for all affected
partitions, without holding any conflicting
+ * locks.
+ *
+ * If appending transactional records, call
maybeStartTransactionVerificationForPartition(s) and call this method in the
callback.
+ * For example, the GroupCoordinator will pass `doCommitTxnOffsets` as the
post-verification callback, and that method eventually call this.
+ *
+ * @param timeout maximum time we will wait to append
before returning
+ * @param requiredAcks number of replicas who must
acknowledge the append before sending the response
+ * @param internalTopicsAllowed boolean indicating whether internal
topics can be appended to
+ * @param origin source of the append request (ie,
client, replication, coordinator)
+ * @param entriesPerPartition the records per partition to be
appended
+ * @param responseCallback callback for sending the response
+ * @param delayedProduceLock lock for the delayed actions
+ * @param requestLocal container for the stateful instances
scoped to this request -- this must correspond to the
+ * thread calling this method
+ * @param verificationGuards the mapping from topic partition to
verification guards if transaction verification is used
+ */
+ def appendForGroup(
Review Comment:
Perhaps we should reject the append if the topic is not
`__consumer_offsets`. Reduces chance of misuse until refactor is complete.
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