kirktrue commented on code in PR #17699:
URL: https://github.com/apache/kafka/pull/17699#discussion_r1868793606


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
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@@ -1032,10 +1042,7 @@ public Set<TopicPartition> paused() {
     public void pause(Collection<TopicPartition> partitions) {
         acquireAndEnsureOpen();
         try {
-            log.debug("Pausing partitions {}", partitions);
-            for (TopicPartition partition : partitions) {
-                subscriptions.pause(partition);
-            }
+            applicationEventHandler.addAndGet(new 
PausePartitionsEvent(partitions, defaultApiTimeoutDeadlineMs()));

Review Comment:
   The events’ constructors will throw a `NullPointerException` by virtue of 
either calling `Objects.requireNonnull()` or 
`Collections.unmodifiableCollection()`. However, I went ahead and added the 
checks explicitly at the `AsyncKafkaConsumer` layer. I also added a check to 
no-op if the collection is empty.



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