jiangbo9510 commented on a change in pull request #530:
URL: https://github.com/apache/pulsar-client-go/pull/530#discussion_r643263650



##########
File path: pulsar/producer_partition.go
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@@ -490,21 +490,36 @@ func (p *partitionProducer) failTimeoutMessages() {
 
                // iterate at most viewSize items
                for i := 0; i < viewSize; i++ {
-                       item := p.pendingQueue.Poll()
+                       tickerNeedWaiting := time.Duration(0)
+                       item := p.pendingQueue.CompareAndPoll(

Review comment:
       > This should also be used to refactor the `pendingQueue.Peek()` at line 
464
   
   @merlimat  There is not necessarily.  pendingQueue.Peek()` at line 464 is to 
check the first item of queue whether timeout. It not modify the queue.
   
   
   
   
   




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