Demogorgon314 commented on code in PR #22753:
URL: https://github.com/apache/pulsar/pull/22753#discussion_r1609170585


##########
pulsar-broker/src/main/java/org/apache/pulsar/broker/loadbalance/impl/ModularLoadManagerImpl.java:
##########
@@ -1122,6 +1126,35 @@ public void writeBrokerDataOnZooKeeper(boolean force) {
         }
     }
 
+    /**
+     * sort bundles by load and select topK bundles for each broker.
+     * @return the number of bundles selected
+     */
+    private CompletableFuture<Integer> selectTopKBundle() {
+        CompletableFuture<Integer> completableFuture = new 
CompletableFuture<>();
+
+        executors.execute(() -> {
+            // make the bundle-data update and sorting executed in single 
thread

Review Comment:
   Why do we run it on a single thread? Can we use `synchronized` here?



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