Jackie-Jiang commented on code in PR #10771:
URL: https://github.com/apache/pinot/pull/10771#discussion_r1203194721


##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java:
##########
@@ -314,7 +314,7 @@ public void onInstanceConfigChange(List<InstanceConfig> 
instanceConfigs, Notific
     Map<String, String> configs = _helixAdmin.getConfig(helixConfigScope,
         Arrays.asList(Helix.ENABLE_CASE_INSENSITIVE_KEY, 
Helix.DEPRECATED_ENABLE_CASE_INSENSITIVE_KEY));
     boolean caseInsensitive =
-        Boolean.parseBoolean(configs.get(Helix.ENABLE_CASE_INSENSITIVE_KEY)) 
|| Boolean.parseBoolean(
+        Boolean.parseBoolean(configs.get(Helix.ENABLE_CASE_INSENSITIVE_KEY)) 
&& Boolean.parseBoolean(

Review Comment:
   This is incorrect



##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/util/HelixSetupUtils.java:
##########
@@ -79,7 +79,8 @@ private static void setupHelixClusterIfNeeded(String 
helixClusterName, String zk
             new 
HelixConfigScopeBuilder(ConfigScopeProperty.CLUSTER).forCluster(helixClusterName).build();
         Map<String, String> configMap = new HashMap<>();
         configMap.put(ZKHelixManager.ALLOW_PARTICIPANT_AUTO_JOIN, 
Boolean.toString(true));
-        configMap.put(ENABLE_CASE_INSENSITIVE_KEY, Boolean.toString(false));
+        configMap.put(ENABLE_CASE_INSENSITIVE_KEY, 
Boolean.toString(DEFAULT_ENABLE_CASE_INSENSITIVE));
+        configMap.put(DEPRECATED_ENABLE_CASE_INSENSITIVE_KEY, 
Boolean.toString(DEFAULT_ENABLE_CASE_INSENSITIVE));

Review Comment:
   Let's not put the deprecated key



##########
pinot-broker/src/main/java/org/apache/pinot/broker/broker/helix/BaseBrokerStarter.java:
##########
@@ -270,8 +270,9 @@ public void start()
     // Initialize FunctionRegistry before starting the broker request handler
     FunctionRegistry.init();
     boolean caseInsensitive =
-        _brokerConf.getProperty(Helix.ENABLE_CASE_INSENSITIVE_KEY, false) || 
_brokerConf.getProperty(
-            Helix.DEPRECATED_ENABLE_CASE_INSENSITIVE_KEY, false);
+        _brokerConf.getProperty(Helix.ENABLE_CASE_INSENSITIVE_KEY, 
Helix.DEFAULT_ENABLE_CASE_INSENSITIVE)

Review Comment:
   Not introduced in this PR, but the correct way to handle it should be:
   1. Check if the key is explicitly configured
   2. If so, use the value
   3. If not, fall back to the deprecated key
   
   Currently, if the official key is configured as `true`, but the deprecated 
key is configured as `false`, the overall result is `false` which is unexpected



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