jhungund commented on code in PR #5856:
URL: https://github.com/apache/hbase/pull/5856#discussion_r1583445711


##########
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/DataTieringManager.java:
##########
@@ -61,25 +63,25 @@ private DataTieringManager(Map<String, HRegion> 
onlineRegions) {
    * Initializes the DataTieringManager instance with the provided map of 
online regions.
    * @param onlineRegions A map containing online regions.
    */
-  public static synchronized void instantiate(Map<String, HRegion> 
onlineRegions) {
-    if (instance == null) {
-      instance = new DataTieringManager(onlineRegions);
-      LOG.info("DataTieringManager instantiated successfully.");
+  public static synchronized void instantiate(Configuration conf,

Review Comment:
   I have made the function isDataTieringFeatureEnabled private function of the 
class. We do not want to give the undue flexiblity to the user to instantiate 
the DataTieringManager even when the feature key is disabled.



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