lianetm commented on code in PR #15613:
URL: https://github.com/apache/kafka/pull/15613#discussion_r1554024079


##########
core/src/test/scala/integration/kafka/api/PlaintextConsumerTest.scala:
##########
@@ -654,6 +654,64 @@ class PlaintextConsumerTest extends BaseConsumerTest {
     assertEquals(7, consumer.committed(Set(tp2).asJava).get(tp2).offset)
   }
 
+  @ParameterizedTest(name = 
TestInfoUtils.TestWithParameterizedQuorumAndGroupProtocolNames)
+  @MethodSource(Array("getTestQuorumAndGroupProtocolParametersAll"))
+  def testCommitAsyncCompletedConsumerCloses(quorum: String, groupProtocol: 
String): Unit = {
+    // This is testing the contract that asynchronous offset commit are 
completed before the consumer
+    // is closed.
+    val producer = createProducer()
+    sendRecords(producer, numRecords = 3, tp)
+    sendRecords(producer, numRecords = 3, tp2)
+
+    val consumer = createConsumer()
+    consumer.assign(List(tp, tp2).asJava)
+
+    // Try without looking up the coordinator first
+    val cb = new CountConsumerCommitCallback
+    consumer.commitAsync(Map[TopicPartition, OffsetAndMetadata]((tp, new 
OffsetAndMetadata(1L))).asJava, cb)
+    consumer.commitAsync(Map[TopicPartition, OffsetAndMetadata]((tp2, new 
OffsetAndMetadata(1L))).asJava, cb)
+    consumer.close()
+    assertEquals(2, cb.successCount);

Review Comment:
   nit: unneeded semi-colon. Java to scala jump tricking us...been there :)



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