jasperjiaguo commented on code in PR #13952:
URL: https://github.com/apache/pinot/pull/13952#discussion_r1755824428


##########
pinot-broker/src/main/java/org/apache/pinot/broker/routing/instanceselector/ReplicaGroupInstanceSelector.java:
##########
@@ -135,37 +137,31 @@ private Pair<Map<String, String>, Map<String, String>> 
selectServersUsingRoundRo
   }
 
   private Pair<Map<String, String>, Map<String, String>> 
selectServersUsingAdaptiveServerSelector(List<String> segments,
-      int requestId, SegmentStates segmentStates, List<String> serverRankList) 
{
+      int requestId, SegmentStates segmentStates, Map<String, Integer> 
serverRankMap) {
     Map<String, String> segmentToSelectedInstanceMap = new 
HashMap<>(HashUtil.getHashMapCapacity(segments.size()));
     // No need to adjust this map per total segment numbers, as optional 
segments should be empty most of the time.
     Map<String, String> optionalSegmentToInstanceMap = new HashMap<>();
-    for (String segment : segments) {
+    segments.forEach(segment -> {

Review Comment:
   nit: while smaller lambdas are good to simplify the code, I think a 
multiline block here might complicate the stack trace if some error is thrown 
inside. I personally think we can just use for loop here.



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