lianetm commented on code in PR #18089:
URL: https://github.com/apache/kafka/pull/18089#discussion_r1880874503


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractMembershipManager.java:
##########
@@ -1175,21 +1175,8 @@ private CompletableFuture<Void> assignPartitions(
 
         // Invoke user call back.
         CompletableFuture<Void> result = 
signalPartitionsAssigned(addedPartitions);
-        result.whenComplete((__, exception) -> {
-            if (exception == null) {
-                // Enable newly added partitions to start fetching and 
updating positions for them.
-                
subscriptions.enablePartitionsAwaitingCallback(addedPartitions);
-            } else {
-                // Keeping newly added partitions as non-fetchable after the 
callback failure.
-                // They will be retried on the next reconciliation loop, until 
it succeeds or the
-                // broker removes them from the assignment.
-                if (!addedPartitions.isEmpty()) {
-                    log.warn("Leaving newly assigned partitions {} marked as 
non-fetchable and not " +
-                            "requiring initializing positions after 
onPartitionsAssigned callback failed.",
-                        addedPartitions, exception);
-                }
-            }
-        });
+        // Enable newly added partitions to start fetching and updating 
positions for them.
+        result.whenComplete((__, exception) -> 
subscriptions.enablePartitionsAwaitingCallback(addedPartitions));

Review Comment:
   great, we're on the same page @chia7712. If you agree @brandboat, could you 
try the sample code from above,  we'll validate it with the test already 
included here that fails without this PR. Thanks!



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