FrankYang0529 commented on code in PR #17199:
URL: https://github.com/apache/kafka/pull/17199#discussion_r1850073759


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/events/ApplicationEventHandler.java:
##########
@@ -39,29 +43,36 @@
  * An event handler that receives {@link ApplicationEvent application events} 
from the application thread which
  * are then readable from the {@link ApplicationEventProcessor} in the {@link 
ConsumerNetworkThread network thread}.
  */
+@SuppressWarnings("this-escape")
 public class ApplicationEventHandler implements Closeable {
 
     private final Logger log;
+    private final Time time;
     private final BlockingQueue<ApplicationEvent> applicationEventQueue;
     private final ConsumerNetworkThread networkThread;
     private final IdempotentCloser closer = new IdempotentCloser();
+    private final Optional<KafkaAsyncConsumerMetrics> 
kafkaAsyncConsumerMetrics;
 
     public ApplicationEventHandler(final LogContext logContext,
                                    final Time time,
                                    final BlockingQueue<ApplicationEvent> 
applicationEventQueue,
                                    final CompletableEventReaper 
applicationEventReaper,
                                    final Supplier<ApplicationEventProcessor> 
applicationEventProcessorSupplier,
                                    final Supplier<NetworkClientDelegate> 
networkClientDelegateSupplier,
-                                   final Supplier<RequestManagers> 
requestManagersSupplier) {
+                                   final Supplier<RequestManagers> 
requestManagersSupplier,
+                                   final Optional<KafkaAsyncConsumerMetrics> 
kafkaAsyncConsumerMetrics) {
         this.log = logContext.logger(ApplicationEventHandler.class);
+        this.time = time;
         this.applicationEventQueue = applicationEventQueue;
+        this.kafkaAsyncConsumerMetrics = kafkaAsyncConsumerMetrics;
         this.networkThread = new ConsumerNetworkThread(logContext,
                 time,
-                applicationEventQueue,
+                this,

Review Comment:
   Revert the change. Create a followup Jira: 
https://issues.apache.org/jira/browse/KAFKA-18048.



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