hachikuji commented on a change in pull request #10005:
URL: https://github.com/apache/kafka/pull/10005#discussion_r570404954



##########
File path: core/src/main/scala/kafka/server/ReplicaManager.scala
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@@ -1881,7 +1884,11 @@ class ReplicaManager(val config: KafkaConfig,
     logManager.handleLogDirFailure(dir)
 
     if (sendZkNotification)
-      zkClient.propagateLogDirEvent(localBrokerId)
+      if (zkClient == null) {

Review comment:
       Can we make `zkClient` an `Option`? By the way, we are really close to 
being able to remove `KafkaZkClient` as a dependency, but I guess we will first 
need #9577. 




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