CalvinConfluent commented on code in PR #17698:
URL: https://github.com/apache/kafka/pull/17698#discussion_r1847474172


##########
clients/src/test/java/org/apache/kafka/clients/producer/internals/TransactionManagerTest.java:
##########
@@ -922,6 +946,103 @@ public void testTransactionManagerEnablesV2() {
         assertTrue(transactionManager.isTransactionV2Enabled());
     }
 
+    @Test
+    public void testTransactionV2AddPartitionAndOffsets() throws 
InterruptedException {
+        initializeTransactionManager(Optional.of(transactionalId), true);
+        doInitTransactions();
+
+        transactionManager.beginTransaction();
+
+        Future<RecordMetadata> responseFuture = appendToAccumulator(tp0);
+
+        assertFalse(responseFuture.isDone());
+
+        prepareProduceResponse(Errors.NONE, producerId, epoch);
+        assertTrue(transactionManager.transactionContainsPartition(tp0));
+        assertTrue(transactionManager.isSendToPartitionAllowed(tp0));
+        assertFalse(responseFuture.isDone());
+        runUntil(responseFuture::isDone);
+
+        // Now, test adding the offsets.
+        Map<TopicPartition, OffsetAndMetadata> offsets = new HashMap<>();
+        offsets.put(tp1, new OffsetAndMetadata(1));
+
+        TransactionalRequestResult addOffsetsResult = 
transactionManager.sendOffsetsToTransaction(
+            offsets, new ConsumerGroupMetadata(consumerGroupId));
+
+        assertTrue(transactionManager.hasPendingOffsetCommits());
+
+        // the result doesn't complete until TxnOffsetCommit returns

Review Comment:
   Looks like we don't have a "offset partition added" state in the old code. 
We always call `AddOffsetsToTxnRequest` before sending offsets.



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