RivenSun2 commented on a change in pull request #11340:
URL: https://github.com/apache/kafka/pull/11340#discussion_r743682843



##########
File path: 
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ConsumerCoordinator.java
##########
@@ -692,10 +692,22 @@ private void validateCooperativeAssignment(final 
Map<String, List<TopicPartition
     }
 
     @Override
-    protected void onJoinPrepare(int generation, String memberId) {
+    protected boolean onJoinPrepare(int generation, String memberId) {
         log.debug("Executing onJoinPrepare with generation {} and memberId 
{}", generation, memberId);
-        // commit offsets prior to rebalance if auto-commit enabled
-        
maybeAutoCommitOffsetsSync(time.timer(rebalanceConfig.rebalanceTimeoutMs));
+        boolean onJoinPrepareAsyncCommitSucceeded = false;
+        // async commit offsets prior to rebalance if auto-commit enabled
+        RequestFuture<Void> future = maybeAutoCommitOffsetsAsync();
+        if (future == null)
+            onJoinPrepareAsyncCommitSucceeded = true;
+        else {
+            if (future.succeeded()) {
+                onJoinPrepareAsyncCommitSucceeded = true;
+            } else if (future.failed() && !future.isRetriable()) {
+                // consistent with async auto-commit failures, we do not 
propagate the exception
+                log.warn("Asynchronous auto-commit offsets failed: {}", 
future.exception().getMessage());
+                onJoinPrepareAsyncCommitSucceeded = true;
+            }

Review comment:
       sure




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