Jackie-Jiang commented on code in PR #16964:
URL: https://github.com/apache/pinot/pull/16964#discussion_r2408924769


##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/PinotHelixResourceManager.java:
##########
@@ -3562,18 +3562,13 @@ public List<TableConfig> 
getTableConfigsForSchema(String schemaName) {
   public List<String> getServerInstancesForTable(String tableName, TableType 
tableType) {
     TableConfig tableConfig = getTableConfig(tableName, tableType);
     Preconditions.checkNotNull(tableConfig);
-    TenantConfig tenantConfig = tableConfig.getTenantConfig();
     Set<String> serverInstances = new HashSet<>();
-    List<InstanceConfig> instanceConfigs = 
HelixHelper.getInstanceConfigs(_helixZkManager);
-    if (tableType == TableType.OFFLINE) {
-      serverInstances.addAll(
-          HelixHelper.getInstancesWithTag(instanceConfigs, 
TagNameUtils.extractOfflineServerTag(tenantConfig)));
-    } else if (TableType.REALTIME.equals(tableType)) {
-      serverInstances.addAll(
-          HelixHelper.getInstancesWithTag(instanceConfigs, 
TagNameUtils.extractConsumingServerTag(tenantConfig)));
-      serverInstances.addAll(
-          HelixHelper.getInstancesWithTag(instanceConfigs, 
TagNameUtils.extractCompletedServerTag(tenantConfig)));
+    IdealState idealState = getTableIdealState(tableConfig.getTableName());

Review Comment:
   Good catch!
   
   We don't need to read table config here.
   I feel most places would want instances from IS. If you find any place 
requires instances from EV, we can introduce another method to read instances 
from EV



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