[fix](load) acquire latest token instead of oldest token in TokenMana…

…ger (#34424)

* [fix](load) acquire latest token instead of oldest token

* fixup

fe/fe-core/src/main/java/org/apache/doris/load/loadv2/TokenManager.java

@@ -44,6 +44,7 @@ public class TokenManager {
 
     private  int thriftTimeoutMs = 300 * 1000;
     private  EvictingQueue<String> tokenQueue;
+    private  String latestToken;
     private  ScheduledExecutorService tokenGenerator;
 
     public TokenManager() {
@@ -52,20 +53,25 @@ public TokenManager() {
     public void start() {
         this.tokenQueue = EvictingQueue.create(Config.token_queue_size);
         // init one token to avoid async issue.
-        this.tokenQueue.offer(generateNewToken());
+        this.addNewToken(generateNewToken());
         this.tokenGenerator = Executors.newScheduledThreadPool(1,
                 new CustomThreadFactory("token-generator"));
-        this.tokenGenerator.scheduleAtFixedRate(() -> tokenQueue.offer(generateNewToken()), 0,
+        this.tokenGenerator.scheduleAtFixedRate(() -> this.addNewToken(generateNewToken()), 0,
                 Config.token_generate_period_hour, TimeUnit.HOURS);
     }
 
+    private void addNewToken(String token) {
+        tokenQueue.offer(token);
+        latestToken = token;
+    }
+
     private String generateNewToken() {
         return UUID.randomUUID().toString();
     }
 
     public String acquireToken() throws UserException {
         if (Env.getCurrentEnv().isMaster() || FeConstants.runningUnitTest) {
-            return tokenQueue.peek();
+            return latestToken;
         } else {
             try {
                 return acquireTokenFromMaster();