abhioncbr commented on code in PR #10877:
URL: https://github.com/apache/pinot/pull/10877#discussion_r1224148162


##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/TableConfigUtils.java:
##########
@@ -607,24 +606,6 @@ static void 
validateInstancePartitionsTypeMapConfig(TableConfig tableConfig) {
     }
   }
 
-  /**
-   * Detects whether both replicaGroupStrategyConfig and 
replicaGroupPartitionConfig are set for a given
-   * table. Validation fails because the table would ignore 
replicaGroupStrategyConfig
-   * when the replicaGroupPartitionConfig is already set.
-   */
-  @VisibleForTesting
-  static void validatePartitionedReplicaGroupInstance(TableConfig tableConfig) 
{
-    if (tableConfig.getValidationConfig().getReplicaGroupStrategyConfig() == 
null
-        || MapUtils.isEmpty(tableConfig.getInstanceAssignmentConfigMap())) {
-      return;
-    }
-    for (Map.Entry<String, InstanceAssignmentConfig> entry: 
tableConfig.getInstanceAssignmentConfigMap().entrySet()) {
-      boolean isNullReplicaGroupPartitionConfig = 
entry.getValue().getReplicaGroupPartitionConfig() == null;
-      Preconditions.checkState(isNullReplicaGroupPartitionConfig,

Review Comment:
   I think we introduced the validation to handle the scenario like what would 
happen in-case provided `partitionColumn` value is different in 
`ReplicaGroupStrategyConfig` and `ReplicaGroupPartitionConfig`? 
   
   Looking at the validation logic I can see it's backward incompatible. Can we 
instead of removing it make sure that if both config has `partitionColumn` 
value then it should be same otherwise fail?



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