lianetm commented on code in PR #18737:
URL: https://github.com/apache/kafka/pull/18737#discussion_r1946859102


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/events/ApplicationEventProcessor.java:
##########
@@ -414,7 +415,15 @@ private void process(final ResetOffsetEvent event) {
      */
     private void process(final CheckAndUpdatePositionsEvent event) {
         CompletableFuture<Boolean> future = 
requestManagers.offsetsRequestManager.updateFetchPositions(event.deadlineMs());
-        future.whenComplete(complete(event.future()));
+        future.whenComplete((value, exception) -> {
+            if (exception != null)
+                event.future().completeExceptionally(exception);
+            else {
+                
requestManagers.commitRequestManager.ifPresent(commitRequestManager ->
+                    
commitRequestManager.setLatestPartitionOffsets(subscriptions.allConsumed()));

Review Comment:
   uhm not really, but my bad that I was referring to making the asyncCommit 
completable but it already is, with a result to know with the requests receives 
a response and we shouldn't change that (needed for commit calbacks). We need 
to bring in another way of knowing when the AsyncCommitEvent has retrieved the 
offsets if we want to keep it in the background. That's the one that would 
complete as soon as the process gets subscription.allConsumed, and the app 
thread knows it's safe to continue (without waiting for a response to the async 
commit of course)



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