[GitHub] [kafka] aiquestion commented on a diff in pull request #12349: KAFKA-14024: Consumer keeps Commit offset in onJoinPrepare in Cooperative rebalance

[GitBox]

aiquestion commented on code in PR #12349:
URL: https://github.com/apache/kafka/pull/12349#discussion_r922694170


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ConsumerCoordinator.java:
##########
@@ -740,24 +743,45 @@ private void validateCooperativeAssignment(final 
Map<String, List<TopicPartition
     }
 
     @Override
-    protected boolean onJoinPrepare(int generation, String memberId) {
+    protected boolean onJoinPrepare(Timer timer, int generation, String 
memberId) {
         log.debug("Executing onJoinPrepare with generation {} and memberId 
{}", generation, memberId);
-        boolean onJoinPrepareAsyncCommitCompleted = false;
+        if (joinPrepareTimer == null) {
+            joinPrepareTimer = time.timer(rebalanceConfig.rebalanceTimeoutMs);
+        }
         // async commit offsets prior to rebalance if auto-commit enabled
-        RequestFuture<Void> future = maybeAutoCommitOffsetsAsync();
-        // return true when
-        // 1. future is null, which means no commit request sent, so it is 
still considered completed
-        // 2. offset commit completed
-        // 3. offset commit failed with non-retriable exception
-        if (future == null)
-            onJoinPrepareAsyncCommitCompleted = true;
-        else if (future.succeeded())
-            onJoinPrepareAsyncCommitCompleted = true;
-        else if (future.failed() && !future.isRetriable()) {
-            log.error("Asynchronous auto-commit of offsets failed: {}", 
future.exception().getMessage());
-            onJoinPrepareAsyncCommitCompleted = true;
+        if (autoCommitEnabled && autoCommitOffsetRequestFuture == null) {
+            autoCommitOffsetRequestFuture = maybeAutoCommitOffsetsAsync();
+        }
+
+        // wait for commit offset response before timer.
+        if (autoCommitOffsetRequestFuture != null) {
+            Timer pollTimer = timer.remainingMs() < 
joinPrepareTimer.remainingMs() ?
+                   timer : joinPrepareTimer;
+            client.poll(autoCommitOffsetRequestFuture, pollTimer);
         }
 
+        // return false when:
+        //   1. offset commit haven't done
+        //   2. offset commit failed with retriable exception and joinPrepare 
haven't expired
+        boolean onJoinPrepareAsyncCommitCompleted = true;
+        if (autoCommitOffsetRequestFuture != null) {
+            if (!autoCommitOffsetRequestFuture.isDone()) {
+                onJoinPrepareAsyncCommitCompleted = false;

Review Comment:
   yes, i think there is some bug in my previous code, fixed it. thanks 



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