Vincent Jiang created KAFKA-14005:
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Summary: LogCleaner doesn't clean log if there is no dirty range
Key: KAFKA-14005
URL: https://issues.apache.org/jira/browse/KAFKA-14005
Project: Kafka
Issue Type: Bug
Reporter: Vincent Jiang
When there is no dirty range to clean (firstDirtyOffset ==
firstUnclenableOffset), buildOffsetMap for dirty range returns an empty offset
map, with map.latestOffset = -1.
Then target cleaning offset range becomes [startOffset, map.latestOffset + 1) =
[startOffset, 0], hence no segments are cleaned.
The correct cleaning offset range should be [startOffset, firstDirtyOffset], so
that the log can be cleaned again to remove abort/commit markers, or tombstones.
LogCleanerTest.FakeOffsetMap.clear() method has a bug - it doesn't reset
lastOffset. This bug causes test case like testAbortMarkerRemoval() pass
false-positively.
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