bozhao12 commented on a change in pull request #11942:
URL: https://github.com/apache/kafka/pull/11942#discussion_r835866708
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File path: core/src/test/scala/unit/kafka/server/ReplicaManagerTest.scala
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@@ -1300,6 +1300,67 @@ class ReplicaManagerTest {
TestUtils.assertNoNonDaemonThreads(this.getClass.getName)
}
+ @Test
+ def testHasPreferredReplica(): Unit = {
+ val topicPartition = 0
+ val topicId = Uuid.randomUuid()
+ val followerBrokerId = 0
+ val leaderBrokerId = 1
+ val leaderEpoch = 1
+ val leaderEpochIncrement = 2
+ val countDownLatch = new CountDownLatch(1)
+
+ // Prepare the mocked components for the test
+ val props = new Properties()
+ props.put(KafkaConfig.ReplicaSelectorClassProp,
"org.apache.kafka.common.replica.RackAwareReplicaSelector")
+ val (replicaManager, _) = prepareReplicaManagerAndLogManager(new
MockTimer(time),
+ topicPartition, leaderEpoch + leaderEpochIncrement, followerBrokerId,
+ leaderBrokerId, countDownLatch, expectTruncation = true, topicId =
Some(topicId), extraProps = props)
+
+ try {
+ val brokerList = Seq[Integer](0, 1).asJava
+
+ val tp0 = new TopicPartition(topic, 0)
+ val tidp0 = new TopicIdPartition(topicId, tp0)
+
+ initializeLogAndTopicId(replicaManager, tp0, topicId)
+
+ // Make this replica the follower
+ val leaderAndIsrRequest2 = new
LeaderAndIsrRequest.Builder(ApiKeys.LEADER_AND_ISR.latestVersion, 0, 0,
brokerEpoch,
+ Seq(new LeaderAndIsrPartitionState()
+ .setTopicName(topic)
+ .setPartitionIndex(0)
+ .setControllerEpoch(0)
+ .setLeader(0)
+ .setLeaderEpoch(1)
+ .setIsr(brokerList)
+ .setZkVersion(0)
+ .setReplicas(brokerList)
+ .setIsNew(false)).asJava,
+ Collections.singletonMap(topic, topicId),
+ Set(new Node(0, "host1", 0), new Node(1, "host2", 1)).asJava).build()
+ replicaManager.becomeLeaderOrFollower(1, leaderAndIsrRequest2, (_, _) =>
())
+ replicaManager.getPartitionOrException(tp0).updateFollowerFetchState(1,
new LogOffsetMetadata(0), 0, 0, 0)
+
+ val metadata: ClientMetadata = new DefaultClientMetadata("rack-a",
"client-id",
+ InetAddress.getByName("localhost"), KafkaPrincipal.ANONYMOUS,
"default")
+
+ val consumerResult = fetchAsConsumer(replicaManager, tidp0,
+ new PartitionData(Uuid.ZERO_UUID, 0, 0, 100000, Optional.empty()),
minBytes = 1,
+ clientMetadata = Some(metadata))
Review comment:
@dajac done
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