FrankYang0529 commented on code in PR #18632:
URL: https://github.com/apache/kafka/pull/18632#discussion_r1926309864


##########
core/src/test/scala/unit/kafka/cluster/PartitionLockTest.scala:
##########
@@ -348,6 +348,7 @@ class PartitionLockTest extends Logging {
     val controllerEpoch = 0
     val replicas = (0 to numReplicaFetchers).map(i => Integer.valueOf(brokerId 
+ i)).toList.asJava
     val isr = replicas
+    replicas.forEach(replicaId => 
when(metadataCache.getAliveBrokerEpoch(replicaId)).thenReturn(Some(1L)))

Review Comment:
   We use `mock(classOf[MetadataCache])` for `metadataCache`, so it didn't 
really get into `KRaftMetadataCache` block. In this PR, we remove `match` 
block, so we have to add related mock.
   
   
https://github.com/apache/kafka/blob/94a1bfb1281f06263976b1ba8bba8c5ac5d7f2ce/core/src/test/scala/unit/kafka/cluster/PartitionLockTest.scala#L270
   
   
https://github.com/apache/kafka/blob/94a1bfb1281f06263976b1ba8bba8c5ac5d7f2ce/core/src/main/scala/kafka/cluster/Replica.scala#L116-L125



##########
core/src/test/scala/unit/kafka/cluster/PartitionTest.scala:
##########
@@ -186,6 +186,7 @@ class PartitionTest extends AbstractPartitionTest {
     val leaderEpoch = 10
     val logStartOffset = 0L
     val partition = setupPartitionWithMocks(leaderEpoch = leaderEpoch, 
isLeader = true)
+    addBrokerEpochToMockMetadataCache(metadataCache, List(remoteReplicaId))

Review Comment:
   Same as above. We use `mock(classOf[MetadataCache])` in 
`AbstractPartitionTest`.
   
   
https://github.com/apache/kafka/blob/94a1bfb1281f06263976b1ba8bba8c5ac5d7f2ce/core/src/test/scala/unit/kafka/cluster/AbstractPartitionTest.scala#L64



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