eolivelli commented on a change in pull request #12259:
URL: https://github.com/apache/pulsar/pull/12259#discussion_r719979012



##########
File path: 
pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerImpl.java
##########
@@ -912,16 +906,14 @@ protected WriteInEventLoopCallback 
newObject(Handle<WriteInEventLoopCallback> ha
     }
 
     private void clearPendingMessagesWhenClose() {
-        PulsarClientException ex = new 
PulsarClientException.AlreadyClosedException(
-                format("The producer %s of the topic %s was already closed 
when closing the producers",
-                        producerName, topic));
-        pendingMessages.forEach(msg -> {
-            
client.getMemoryLimitController().releaseMemory(msg.uncompressedSize);
-            msg.sendComplete(ex);
-            msg.cmd.release();
-            msg.recycle();
-        });
-        pendingMessages.clear();
+        setState(State.Closed);
+        synchronized (this) {

Review comment:
       in the previous code "setState" was inside the `synchronized` block
   so probably is is better to keep it inside that block.
   
   At that point we can simply move the  `synchronized` keyword in the 
signature of the method

##########
File path: 
pulsar-client/src/main/java/org/apache/pulsar/client/impl/ProducerImpl.java
##########
@@ -912,16 +906,14 @@ protected WriteInEventLoopCallback 
newObject(Handle<WriteInEventLoopCallback> ha
     }
 
     private void clearPendingMessagesWhenClose() {

Review comment:
       what about changing this name to "closeAndClearPendingMessages" ?
   
   because now the method does something different from the previous behaviour




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