jolshan commented on code in PR #14885:
URL: https://github.com/apache/kafka/pull/14885#discussion_r1414508061
##########
core/src/main/scala/kafka/coordinator/group/CoordinatorPartitionWriter.scala:
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@@ -126,57 +129,63 @@ class CoordinatorPartitionWriter[T](
val magic = logConfig.recordVersion.value
val maxBatchSize = logConfig.maxMessageSize
val currentTimeMs = time.milliseconds()
-
- val recordsBuilder = MemoryRecords.builder(
- ByteBuffer.allocate(math.min(16384, maxBatchSize)),
- magic,
- compressionType,
- TimestampType.CREATE_TIME,
- 0L,
- time.milliseconds(),
- producerId,
- producerEpoch,
- 0,
- producerId != RecordBatch.NO_PRODUCER_ID,
- RecordBatch.NO_PARTITION_LEADER_EPOCH
- )
-
- records.forEach { record =>
- val keyBytes = serializer.serializeKey(record)
- val valueBytes = serializer.serializeValue(record)
-
- if (recordsBuilder.hasRoomFor(currentTimeMs, keyBytes, valueBytes,
EMPTY_HEADERS)) recordsBuilder.append(
- currentTimeMs,
- keyBytes,
- valueBytes,
- EMPTY_HEADERS
- ) else throw new RecordTooLargeException(s"Message batch size is
${recordsBuilder.estimatedSizeInBytes()} bytes " +
- s"in append to partition $tp which exceeds the maximum configured
size of $maxBatchSize.")
+ val bufferSupplier = threadLocalBufferSupplier.get()
+ val buffer = bufferSupplier.get(math.min(16384, maxBatchSize))
Review Comment:
Is this 16384 just the default batch size?
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