ahuang98 commented on code in PR #18240:
URL: https://github.com/apache/kafka/pull/18240#discussion_r1897014715
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raft/src/main/java/org/apache/kafka/raft/UnattachedState.java:
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@@ -71,13 +73,7 @@ public UnattachedState(
@Override
public ElectionState election() {
- if (votedKey.isPresent()) {
- return ElectionState.withVotedCandidate(epoch, votedKey().get(),
voters);
- } else if (leaderId.isPresent()) {
- return ElectionState.withElectedLeader(epoch, leaderId.getAsInt(),
voters);
- } else {
- return ElectionState.withUnknownLeader(epoch, voters);
- }
+ return new ElectionState(epoch, leaderId, votedKey, voters);
Review Comment:
Retaining both leaderId and votedKey also can help other replicas find the
leader faster (though not needed for correctness) -
UnattachedVoted w/ leader will reject vote requests w/ a leaderId.
UnattachedVoted w/o leader will reject vote request w/o a leaderId
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