gaurav-narula commented on code in PR #15232:
URL: https://github.com/apache/kafka/pull/15232#discussion_r1466767964


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metadata/src/main/java/org/apache/kafka/controller/ReplicationControlManager.java:
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@@ -1408,6 +1408,7 @@ void handleDirectoriesOffline(
                     (short) 2));
             log.warn("Directories {} in broker {} marked offline, remaining 
directories: {}",
                     newOfflineDirs, brokerId, newOnlineDirs);
+            // XXX If the result of this is the broker has no online 
directories then fence.

Review Comment:
   Wouldn't `newOfflineDirs` and `newOnlineDirs` will always be empty until the 
BrokerRegistrationRecord is updated because they are set operations 
(intersection, difference) on the list of directories during BrokerRegistration 
which is an empty set?



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