TaiJuWu commented on code in PR #20859:
URL: https://github.com/apache/kafka/pull/20859#discussion_r2516668022


##########
raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java:
##########
@@ -3356,30 +3366,51 @@ private boolean 
shouldSendAddOrRemoveVoterRequest(FollowerState state, long curr
             quorumConfig.autoJoin() && 
state.hasUpdateVoterSetPeriodExpired(currentTimeMs);
     }
 
+    private boolean shouldSendAddVoterRequest(FollowerState state, long 
currentTimeMs) {
+        return canJoin && autoJoinEnable(state, currentTimeMs);
+    }
+
+    private boolean shouldSendRemoveVoterRequest(FollowerState state, long 
currentTimeMs) {
+        final var localReplicaKey = quorum.localReplicaKeyOrThrow();
+        final var voters = partitionState.lastVoterSet();
+
+        if (voters.voterIds().contains(localReplicaKey.id())) {
+            if (autoJoinEnable(state, currentTimeMs)) {
+                canJoin = true;

Review Comment:
   I have added comment here, PTAL.



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