Jackie-Jiang commented on code in PR #11785:
URL: https://github.com/apache/pinot/pull/11785#discussion_r1358990509


##########
pinot-controller/src/main/java/org/apache/pinot/controller/api/resources/PinotSegmentRestletResource.java:
##########
@@ -700,19 +699,24 @@ public ServerReloadControllerJobStatusResponse 
getReloadJobStatus(
     
serverReloadControllerJobStatusResponse.setTotalServersQueried(serverUrls.size());
     
serverReloadControllerJobStatusResponse.setTotalServerCallsFailed(serviceResponse._failedResponseCount);
 
+    // Merge all server responses.
+    List<String> pendingSegments = new ArrayList<>();
+    int successCount = 0;
     for (Map.Entry<String, String> streamResponse : 
serviceResponse._httpResponses.entrySet()) {
       String responseString = streamResponse.getValue();
       try {
         ServerReloadControllerJobStatusResponse response =
             JsonUtils.stringToObject(responseString, 
ServerReloadControllerJobStatusResponse.class);
-        serverReloadControllerJobStatusResponse.setSuccessCount(
-            serverReloadControllerJobStatusResponse.getSuccessCount() + 
response.getSuccessCount());
+        successCount += response.getSuccessCount();
+        pendingSegments.addAll(response.getPendingSegments());

Review Comment:
   This will throw NPE when server is running the old version



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