ahuang98 commented on code in PR #16079:
URL: https://github.com/apache/kafka/pull/16079#discussion_r1628082127
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raft/src/test/java/org/apache/kafka/raft/LeaderStateTest.java:
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@@ -272,20 +280,109 @@ public void testUpdateHighWatermarkQuorumSizeThree() {
assertEquals(Optional.empty(), state.highWatermark());
assertTrue(state.updateReplicaState(node2, 0, new
LogOffsetMetadata(15L)));
assertEquals(Optional.of(new LogOffsetMetadata(15L)),
state.highWatermark());
- assertFalse(state.updateLocalState(new LogOffsetMetadata(20L)));
+ assertFalse(state.updateLocalState(new LogOffsetMetadata(20L),
voterSet));
assertEquals(Optional.of(new LogOffsetMetadata(15L)),
state.highWatermark());
assertTrue(state.updateReplicaState(node1, 0, new
LogOffsetMetadata(20L)));
assertEquals(Optional.of(new LogOffsetMetadata(20L)),
state.highWatermark());
assertFalse(state.updateReplicaState(node2, 0, new
LogOffsetMetadata(20L)));
assertEquals(Optional.of(new LogOffsetMetadata(20L)),
state.highWatermark());
}
+ @Test
+ public void testUpdateHighWatermarkAddingFollowerToVoterStates() {
+ int node1 = 1;
+ int node2 = 2;
+ Set<Integer> originalVoterSet = mkSet(localId, node1);
+ LeaderState<?> state = newLeaderState(originalVoterSet, 10L);
+ assertFalse(state.updateLocalState(new LogOffsetMetadata(15L),
originalVoterSet));
+ assertFalse(state.updateReplicaState(node1, 0, new
LogOffsetMetadata(10L)));
+ assertEquals(Optional.empty(), state.highWatermark());
+
+ // updating replica state of 2 before it joins voterSet should not
increase HW to 15L
+ assertFalse(state.updateReplicaState(node2, 0, new
LogOffsetMetadata(15L)));
+ assertEquals(Optional.empty(), state.highWatermark());
Review Comment:
this is for node2 _before_ its in the voter set - so it shouldn't change the
HW.
the HW is originally `Optional.empty()` because the voters have end offsets
equal to the epoch start offset
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