mjsax commented on code in PR #23276:
URL: https://github.com/apache/kafka/pull/23276#discussion_r3882114731


##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/GroupConfig.java:
##########
@@ -514,8 +514,9 @@ private static void 
validateNoDuplicateRackAwareAssignmentTags(Map<String, Strin
         if (rawValue == null) {
             return;
         }
-        String trimmed = rawValue.trim();
-        List<String> rawTags = trimmed.isEmpty() ? List.of() : 
List.of(trimmed.split("\\s*,\\s*", -1));
+        @SuppressWarnings("unchecked")
+        List<String> rawTags = (List<String>) ConfigDef.parseType(
+                STREAMS_RACK_AWARE_ASSIGNMENT_TAGS_CONFIG, rawValue, 
ConfigDef.Type.LIST);

Review Comment:
   Make it either one line, or if too long, one parameter per line. That's 
easier to read for the human eye, and also reduced git-diff size is code is 
changes later.



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