cadonna commented on code in PR #15035:
URL: https://github.com/apache/kafka/pull/15035#discussion_r1431561378


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/MembershipManagerImpl.java:
##########
@@ -672,7 +672,11 @@ public void onHeartbeatRequestSent() {
         MemberState state = state();
         if (isStaled()) {
             log.debug("Member {} is staled and is therefore leaving the group. 
 It will rejoin upon the next poll.", memberEpoch);
-            transitionToJoining();
+            // clear the current assignment and subscription, and trigger 
rebalance listener on the next poll
+            
invokeOnPartitionsRevokedCallback(subscriptions.assignedPartitions()).whenComplete((r,
 e) -> {

Review Comment:
   Isn't revocation something that the broker tells the member to because of 
rebalancing? In this case it is the member that decides to leave the group 
because it exceeded the poll interval. It is similar to close. I do not think 
we revoke partitions in close, do we? 



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