codelipenghui commented on code in PR #24476:
URL: https://github.com/apache/pulsar/pull/24476#discussion_r2180420338


##########
pulsar-client/src/main/java/org/apache/pulsar/client/impl/MultiTopicsConsumerImpl.java:
##########
@@ -571,6 +571,11 @@ protected CompletableFuture<Void> 
doReconsumeLater(Message<?> message, AckType a
 
     @Override
     public void negativeAcknowledge(MessageId messageId) {
+        if (getState() != State.Ready) {
+            log.warn("[{}] [{}] Cannot negative acknowledge message {} - 
consumer is not ready (state: {})",

Review Comment:
   @nodece 
   
   It will break the API since we didn't declare the PulsarClientException for 
the method signature.
   
   And if the consumer gets closed, all the unacked messages will be 
redelivered automatically. Users don't need to care about the failures of 
negativeAcknowledge() in this case.



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