chia7712 commented on code in PR #20068:
URL: https://github.com/apache/kafka/pull/20068#discussion_r2344052086


##########
core/src/test/scala/integration/kafka/api/PlaintextAdminIntegrationTest.scala:
##########
@@ -3093,6 +3107,7 @@ class PlaintextAdminIntegrationTest extends 
BaseAdminIntegrationTest {
     TestUtils.assertLeader(client, partition2, 0)
 
     // Now change the preferred leader to 1
+    waitForBrokerMetadataPropagation(partition1);

Review Comment:
   not sure why we check only `partition1`? the method `changePreferredLeader` 
could impact both partitions, right?



##########
core/src/test/scala/integration/kafka/api/PlaintextAdminIntegrationTest.scala:
##########
@@ -3147,9 +3164,12 @@ class PlaintextAdminIntegrationTest extends 
BaseAdminIntegrationTest {
     TestUtils.assertLeader(client, partition2, 2)
 
     // Now change the preferred leader to 1
+    waitForBrokerMetadataPropagation(partition1)
+    waitForBrokerMetadataPropagation(partition2)
     changePreferredLeader(prefer1)
     // but shut it down...
     killBroker(1)
+    waitForBrokerMetadataPropagation(partition1)

Review Comment:
   ditto



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