amarathavale commented on a change in pull request #6842:
URL: https://github.com/apache/incubator-pinot/pull/6842#discussion_r630721982



##########
File path: 
pinot-server/src/main/java/org/apache/pinot/server/starter/helix/HelixServerStarter.java
##########
@@ -154,6 +161,36 @@ public HelixServerStarter(String helixClusterName, String 
zkAddress, PinotConfig
             Server.DEFAULT_CURRENT_DATA_TABLE_VERSION));
   }
 
+  /**
+   *  Invoke pinot environment provider factory's init method to register the 
environment provider &
+   *  fetch the overridden server configs for the invoked environment provider.
+   */
+  @Nullable
+  private Map<String, String> fetchEnvironmentProperties() {
+    PinotConfiguration environmentProviderConfigs = _serverConf.subset(
+        Server.PREFIX_OF_CONFIG_OF_ENVIRONMENT_PROVIDER_FACTORY);
+
+    if (environmentProviderConfigs.toMap().isEmpty()) {
+      LOGGER.info("No environment provider config values provided for server 
property: {}",
+          Server.PREFIX_OF_CONFIG_OF_ENVIRONMENT_PROVIDER_FACTORY);
+      return null;

Review comment:
       A null return type for a map leads to 3 states: null/empty/non-empty. I 
see you are handling the null case, but returning an empty map would imply the 
same thing? i.e. there are no overrides?




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