Re: [PR] KAFKA-17869: Adding tests to ensure KIP-1076 doesn't interfere with consumer metrics[1/3] [kafka]

[via GitHub]

mjsax commented on code in PR #17781:
URL: https://github.com/apache/kafka/pull/17781#discussion_r1841470586


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -641,17 +641,15 @@ private void updateGroupMetadata(final Optional<Integer> 
memberEpoch, final Stri
 
     @Override
     public void registerMetricForSubscription(KafkaMetric metric) {
-        if (clientTelemetryReporter.isPresent()) {
-            ClientTelemetryReporter reporter = clientTelemetryReporter.get();
-            reporter.metricChange(metric);
+        if (!metrics().containsKey(metric.metricName())) {
+            clientTelemetryReporter.ifPresent(reporter -> 
reporter.metricChange(metric));
         }
     }
 
     @Override
     public void unregisterMetricFromSubscription(KafkaMetric metric) {
-        if (clientTelemetryReporter.isPresent()) {
-            ClientTelemetryReporter reporter = clientTelemetryReporter.get();
-            reporter.metricRemoval(metric);
+        if (!metrics().containsKey(metric.metricName())) {
+            clientTelemetryReporter.ifPresent(reporter -> 
reporter.metricRemoval(metric));

Review Comment:
   So `metrics()` only returns user-registered metrics, but not of the consumer 
built-in metrics?



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