bharatviswa504 commented on a change in pull request #1494:
URL: https://github.com/apache/ozone/pull/1494#discussion_r640507618



##########
File path: 
hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/ratis/OzoneManagerStateMachine.java
##########
@@ -166,6 +167,29 @@ public void notifyTermIndexUpdated(long currentTerm, long 
index) {
     computeAndUpdateLastAppliedIndex(index, currentTerm, null, false);
   }
 
+  /**
+   * Called to notify state machine about configuration changes.
+   * Configurations changes include addition of newly bootstrapped OM.
+   */
+  @Override
+  public void notifyConfigurationChanged(long term, long index,
+      RaftProtos.RaftConfigurationProto newRaftConfiguration) {
+    List<RaftProtos.RaftPeerProto> newPeers =
+        newRaftConfiguration.getPeersList();
+    LOG.info("Received Configuration change notification from Ratis. New Peer" 
+
+        " list:\n{}", newPeers);
+    for (RaftProtos.RaftPeerProto raftPeerProto : newPeers) {
+      String omNodeId = RaftPeerId.valueOf(raftPeerProto.getId()).toString();
+      if (!ozoneManager.doesPeerExist(omNodeId)) {
+        LOG.info("Adding new OM {} to the Peer list.", omNodeId);
+        ozoneManager.addOMNodeToPeers(omNodeId);

Review comment:
       Looks like this is taken care of. With this       // Load new 
configuration object to read in new peer information
         setConfiguration(new OzoneConfiguration());
   
   So, here it reloads config from disk again? Have you tried on a 
docker/cluster to verify this. (From reading code looks like config load has 
taken care) Just curious.




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