kevin-wu24 commented on code in PR #20859:
URL: https://github.com/apache/kafka/pull/20859#discussion_r2567198996
##########
raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java:
##########
@@ -501,6 +503,14 @@ public void initialize(
logger.info("Reading KRaft snapshot and log as part of the
initialization");
partitionState.updateState();
logger.info("Starting voters are {}", partitionState.lastVoterSet());
+ if (nodeId.isPresent()) {
+ // if the the VotersRecord with the highest offset contain the
node id of this node,
+ // mark it as already joined because it is already in the voter
set.
+ // Check using ReplicaKey (id + directoryId) to handle KIP-853
properly
+ hasJoined = partitionState.lastVoterSet().isVoter(
+ ReplicaKey.of(nodeId.getAsInt(), nodeDirectoryId)
+ );
+ }
Review Comment:
```
if (quorumConfig.autoJoin() && partitionState.lastVoterSet().size() == 1
&&
partitionState.lastVoterSet().isVoter(ReplicaKey.of(nodeId.getAsInt(),
nodeDirectoryId)) {
hasJoined = Optional.of(true);
```
is the correct check. The code you have always evaluates to true because the
left hand side of the || is always true for a controller in `intialize()`.
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