codelipenghui commented on a change in pull request #8207:
URL: https://github.com/apache/pulsar/pull/8207#discussion_r500853313



##########
File path: 
pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerBase.java
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@@ -677,19 +677,16 @@ protected void notifyPendingBatchReceivedCallBack() {
         if (opBatchReceive == null || opBatchReceive.future == null) {
             return;
         }
-        notifyPendingBatchReceivedCallBack(opBatchReceive);
+        synchronized (incomingMessages) {

Review comment:
       Looks it's better to let the MessagesImpl.add() keep thread-safe. So 
that we can release the lock faster.




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