ivanyu commented on code in PR #13277:
URL: https://github.com/apache/kafka/pull/13277#discussion_r1635256179


##########
clients/src/main/java/org/apache/kafka/clients/NetworkClient.java:
##########
@@ -705,16 +715,25 @@ public Node leastLoadedNode(long now) {
         Node foundCanConnect = null;
         Node foundReady = null;
 
+        boolean atLeastOneNodeConnected = false;
+
         int offset = this.randOffset.nextInt(nodes.size());
         for (int i = 0; i < nodes.size(); i++) {
             int idx = (offset + i) % nodes.size();
             Node node = nodes.get(idx);
+
+            if (!atLeastOneNodeConnected
+                    && connectionStates.isReady(node.idString(), now)
+                    && selector.isChannelReady(node.idString())) {
+                atLeastOneNodeConnected = true;

Review Comment:
   Right, I added some unit testing



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