junrao commented on code in PR #15904:
URL: https://github.com/apache/kafka/pull/15904#discussion_r1595670550
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core/src/test/scala/unit/kafka/log/LogValidatorTest.scala:
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@@ -414,7 +414,15 @@ class LogValidatorTest {
assertEquals(now + 1, validatingResults.maxTimestampMs,
s"Max timestamp should be ${now + 1}")
- assertEquals(2, validatingResults.shallowOffsetOfMaxTimestamp)
+ // V2: Only one batch is in the records, so the shallow
OffsetOfMaxTimestamp is the last offset of the single batch
+ // V1: 3 batches are in the records, so the shallow OffsetOfMaxTimestamp
is the timestamp of branch-1
Review Comment:
Hmm, what is branch?
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core/src/main/scala/kafka/log/UnifiedLog.scala:
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@@ -1177,6 +1177,8 @@ class UnifiedLog(@volatile var logStartOffset: Long,
validBytesCount += batchSize
val batchCompression = CompressionType.forId(batch.compressionType.id)
+ // V2: only one batch regardless of compression
Review Comment:
This is not very accurate. `analyzeAndValidateRecords()` is called in the
follower append too, which could include more than one batch. It's just that
sourceCompression is only used on the leader path, which only contains one
batch currently.
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