[GitHub] [kafka] bozhao12 commented on a change in pull request #11942: KAFKA-13767: Fetch response did not need delay return when the preferred read replica not local replica

[GitBox]

bozhao12 commented on a change in pull request #11942:
URL: https://github.com/apache/kafka/pull/11942#discussion_r835149333



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File path: core/src/test/scala/integration/kafka/server/DelayedFetchTest.scala
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@@ -166,6 +171,34 @@ class DelayedFetchTest {
     assertTrue(fetchResultOpt.isDefined)
   }
 
+
+  @Test
+  def testHasPreferredReadReplica(): Unit = {

Review comment:
       @dajac  Following your  suggestion, I have modified the unit test.
   I also found some problems when modifying the unit test, which I think it's 
a bug:
   If KafkaConfig.ReplicaSelectorClassProp is not configured, 
ReplicaManager.replicaSelectorOpt will  be a None object, which will cause most 
of the unit tests on preferred read replicas to not take test purpose., eg 
ReplicaManagerTest.testReplicaSelector 




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