m1a2st commented on code in PR #20334:
URL: https://github.com/apache/kafka/pull/20334#discussion_r2293538520


##########
server/src/main/java/org/apache/kafka/server/config/AbstractKafkaConfig.java:
##########
@@ -79,7 +80,11 @@ public AbstractKafkaConfig(ConfigDef definition, Map<?, ?> 
originals, Map<String
     }
 
     public List<String> logDirs() {
-        return 
Csv.parseCsvList(Optional.ofNullable(getString(ServerLogConfigs.LOG_DIRS_CONFIG)).orElse(getString(ServerLogConfigs.LOG_DIR_CONFIG)));
+        return Optional.ofNullable(getList(ServerLogConfigs.LOG_DIRS_CONFIG))
+                
.orElse(Arrays.stream(getString(ServerLogConfigs.LOG_DIR_CONFIG).split(",")).toList())

Review Comment:
   I think making `LOG_DIR_CONFIG` a LIST feels a bit odd. While it can be 
split by commas, if this configuration is allowed to have multiple values, it 
essentially overlaps with `LOG_DIRS_CONFIG`. If that’s the case, we might 
consider deprecating `LOG_DIR_CONFIG` and updating `LOG_DIRS_CONFIG` so that it 
does not allow `null` entries.



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