mimaison commented on a change in pull request #8730:
URL: https://github.com/apache/kafka/pull/8730#discussion_r498123333



##########
File path: 
connect/mirror/src/test/java/org/apache/kafka/connect/mirror/MirrorConnectorsIntegrationTest.java
##########
@@ -429,4 +489,69 @@ private void deleteAllTopics(EmbeddedKafkaCluster cluster) 
{
         } catch (Throwable e) {
         }
     }
+
+    private void produceMessages(EmbeddedConnectCluster cluster, String 
topicName, String msgPrefix) {
+        produceMessages(cluster, topicName, msgPrefix, null);

Review comment:
       I wonder if we should pass `NUM_PARTITIONS` instead of `null` for the 
last argument. Then `numPartitions` can be an `int` in the other 
`produceMessages()` method. WDYT?

##########
File path: 
connect/mirror/src/test/java/org/apache/kafka/connect/mirror/MirrorConnectorsIntegrationTest.java
##########
@@ -381,45 +440,46 @@ public void testOneWayReplicationWithAutoOffsetSync() 
throws InterruptedExceptio
 
         waitUntilMirrorMakerIsRunning(backup, mm2Config, "primary", "backup");
 
-        // create a consumer at backup cluster with same consumer group Id to 
consume 1 topic
-        Consumer<byte[], byte[]> consumer = 
backup.kafka().createConsumerAndSubscribeTo(
-            Collections.singletonMap("group.id", "consumer-group-1"), 
"primary.test-topic-1");
+        // Map<TopicPartition, OffsetAndMetadata> offsets =

Review comment:
       Is this left over from debugging?




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