kamalcph commented on code in PR #15825:
URL: https://github.com/apache/kafka/pull/15825#discussion_r1593471183
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core/src/main/scala/kafka/log/UnifiedLog.scala:
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@@ -1424,11 +1424,18 @@ class UnifiedLog(@volatile var logStartOffset: Long,
/**
* Given a message offset, find its corresponding offset metadata in the
log.
- * If the message offset is out of range, throw an OffsetOutOfRangeException
+ * 1. If the message offset is lesser than the log-start-offset, then throw
an OffsetOutOfRangeException
Review Comment:
Should we avoid throwing the error and return message-only metadata when the
offset is lesser than the log-start-offset?
While updating the
[UnifiedLog#updateLogStartOffset](https://sourcegraph.com/github.com/apache/kafka@5f933ac840343429e911f5706ccb7cd8dc379462/-/blob/core/src/main/scala/kafka/log/UnifiedLog.scala?L535),
the HWM also gets updated and it doesn't hit the `fetchHighWatermarkMetadata`
(or) `convertToOffsetMetadataOrThrow` so the call will succeed even when
current-log-start-offset > old-HWM.
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