Alok Nikhil created KAFKA-12258:
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Summary: Change the BatchAccumulator to split records into batches
Key: KAFKA-12258
URL: https://issues.apache.org/jira/browse/KAFKA-12258
Project: Kafka
Issue Type: Sub-task
Components: controller, core
Affects Versions: 2.8.0
Reporter: Alok Nikhil
Modify the `BatchAccumulator.append contract` to support splitting a batch of
records whose size is greater than the maximum allowed size (of 1048576
currently) into batches to avoid RaftClient failures such as
{code:java}
leader=0, leaderEpoch=0, partitionEpoch=0) at version 0),
ApiMessageAndVersion(TopicRecord(name='topic-BEHRW9999',
topicId=6cRudOGO3yqlsu48RwyPSw) at version 0),
ApiMessageAndVersion(PartitionRecord(partitionId=0,
topicId=6cRudOGO3yqlsu48RwyPSw, replicas=[1, 2, 0], isr=[1, 2, 0],
removingReplicas=null, addingReplicas=null, leader=1, leaderEpoch=0,
partitionEpoch=0) at version 0)] is 1088890, which exceeds the maximum allowed
batch size of 1048576 Jan 30 00:13:40 ip-10-0-0-254
kafka-server-start.sh[633637]: at
org.apache.kafka.raft.internals.BatchAccumulator.append(BatchAccumulator.java:110)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
org.apache.kafka.raft.KafkaRaftClient.scheduleAppend(KafkaRaftClient.java:1885)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
org.apache.kafka.raft.metadata.MetaLogRaftShim.scheduleWrite(MetaLogRaftShim.java:60)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
org.apache.kafka.controller.QuorumController$ControllerWriteEvent.run(QuorumController.java:406)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
org.apache.kafka.common.utils.KafkaEventQueue$EventContext.run(KafkaEventQueue.java:117)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
org.apache.kafka.common.utils.KafkaEventQueue$EventHandler.handleEvents(KafkaEventQueue.java:192)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
org.apache.kafka.common.utils.KafkaEventQueue$EventHandler.run(KafkaEventQueue.java:165)
Jan 30 00:13:40 ip-10-0-0-254 kafka-server-start.sh[633637]: at
java.base/java.lang.Thread.run(Thread.java:834) Jan 30 00:13:40 ip-10-0-0-254
kafka-server-start.sh[633637]: [2021-01-30 00:13:40,277] INFO [Controller 3000]
Reverting to snapshot 2232 (org.apache.kafka.timeline.SnapshotRegistry)
{code}
*Example use-case*: Creating 10,000 topics in a single API call
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