jolshan commented on a change in pull request #11126:
URL: https://github.com/apache/kafka/pull/11126#discussion_r678601444



##########
File path: core/src/main/scala/kafka/server/ReplicaManager.scala
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@@ -1405,11 +1393,28 @@ class ReplicaManager(val config: KafkaConfig,
                   s"leader epoch $currentLeaderEpoch")
                 responseMap.put(topicPartition, Errors.STALE_CONTROLLER_EPOCH)
               } else {
-                stateChangeLogger.info(s"Ignoring LeaderAndIsr request from " +
-                  s"controller $controllerId with correlation id 
$correlationId " +
-                  s"epoch $controllerEpoch for partition $topicPartition since 
its associated " +
-                  s"leader epoch $requestLeaderEpoch matches the current 
leader epoch")
-                responseMap.put(topicPartition, Errors.STALE_CONTROLLER_EPOCH)
+                // The controller may send LeaderAndIsr to upgrade to using 
topic IDs without bumping the epoch.
+                val error = requestTopicId match {
+                  case Some(topicId) if partition.log.isEmpty =>
+                    // We wanted to assign the topic ID to the log, but the 
log was unavailable.
+                    stateChangeLogger.info(s"Tried to update log for 
$topicPartition to assign topic ID " +
+                      s"$topicId from LeaderAndIsr request from controller 
$controllerId with correlation" +
+                      s" id $correlationId epoch $controllerEpoch")
+                    Errors.KAFKA_STORAGE_ERROR

Review comment:
       Ah hmmm maybe I actually misread this code previously. I'll take a look 
again.




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