chia7712 commented on code in PR #20205:
URL: https://github.com/apache/kafka/pull/20205#discussion_r2223634384
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storage/src/main/java/org/apache/kafka/server/log/remote/storage/RemoteLogManager.java:
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@@ -1639,20 +1639,20 @@ static boolean
isRemoteSegmentWithinLeaderEpochs(RemoteLogSegmentMetadata segmen
*/
// Visible for testing
static NavigableMap<Integer, Long>
buildFilteredLeaderEpochMap(NavigableMap<Integer, Long> leaderEpochs) {
- List<Integer> epochsWithNoMessages = new ArrayList<>();
+ if (leaderEpochs.size() <= 1) return leaderEpochs;
Review Comment:
Is this early return necessary?
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storage/src/test/java/org/apache/kafka/server/log/remote/storage/RemoteLogManagerTest.java:
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@@ -1847,6 +1847,18 @@ public void testBuildFilteredLeaderEpochMap() {
NavigableMap<Integer, Long> refinedLeaderEpochMap =
RemoteLogManager.buildFilteredLeaderEpochMap(leaderEpochToStartOffset);
assertEquals(expectedLeaderEpochs, refinedLeaderEpochMap);
+
+
+ TreeMap<Integer, Long> leaderEpochToStartOffset2 = new TreeMap<>();
Review Comment:
It would be useful to have a unit test to loop over 1000 times, using random
input to ensure before/after methods have same output.
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