kirktrue commented on code in PR #15640:
URL: https://github.com/apache/kafka/pull/15640#discussion_r1599232056


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ConsumerNetworkThread.java:
##########
@@ -144,6 +150,36 @@ void runOnce() {
                 .map(Optional::get)
                 .map(rm -> rm.maximumTimeToWait(currentTimeMs))
                 .reduce(Long.MAX_VALUE, Math::min);
+
+        reapExpiredApplicationEvents(currentTimeMs);
+    }
+
+    /**
+     * Process the events—if any—that were produced by the application thread.
+     */
+    private void processApplicationEvents() {
+        LinkedList<ApplicationEvent> events = new LinkedList<>();
+        applicationEventQueue.drainTo(events);
+
+        for (ApplicationEvent event : events) {
+            try {
+                if (event instanceof CompletableApplicationEvent)
+                    
applicationEventReaper.add((CompletableApplicationEvent<?>) event);
+
+                applicationEventProcessor.process(event);
+            } catch (Throwable t) {
+                log.warn("Error processing event {}", t.getMessage(), t);

Review Comment:
   There's some debate over that, for sure. However, this is the same error 
processing we've used before this change, so hopefully we can continue that 
debate separately? 



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