codersfarm opened a new issue, #5380:
URL: https://github.com/apache/rocketmq/issues/5380

   
![2022-10-22_165833](https://user-images.githubusercontent.com/38873832/197331095-931e1261-0704-4935-90da-aabc004d5125.png)
   In MQAdminImpl.class, queryMessage method, `CountDownLatch countDownLatch = 
new CountDownLatch(brokerAddrs.size());` the size  is brokerAddrs.size(), and 
countDownLatch countDown  finally. why need this method  below `boolean ok = 
countDownLatch.await(timeoutMillis * 4, TimeUnit.MILLISECONDS);`
   


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