AndrewJSchofield commented on code in PR #18672:
URL: https://github.com/apache/kafka/pull/18672#discussion_r1933889523


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ShareConsumeRequestManager.java:
##########
@@ -172,73 +172,58 @@ public PollResult poll(long currentTimeMs) {
                         k -> sessionHandlers.computeIfAbsent(node.id(), n -> 
new ShareSessionHandler(logContext, n, memberId)));
 
                 TopicIdPartition tip = new TopicIdPartition(topicId, 
partition);
-                Acknowledgements acknowledgementsToSend = 
fetchAcknowledgementsToSend.remove(tip);
-                if (acknowledgementsToSend != null) {
-                    
metricsManager.recordAcknowledgementSent(acknowledgementsToSend.size());
-                    fetchAcknowledgementsInFlight.put(tip, 
acknowledgementsToSend);
+                Acknowledgements acknowledgementsToSend = null;
+                Map<TopicIdPartition, Acknowledgements> 
nodeAcknowledgementsMap = fetchAcknowledgementsToSend.get(node.id());

Review Comment:
   I think there will need to be a follow-on PR for this. In a way, you're 
correct, but I think to maintain the ordering of things, we need to fail some 
acknowledgements more aggressively from the poll loop. I had been avoiding 
that, but I think it's inevitable actually.



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