mjsax commented on code in PR #17781:
URL: https://github.com/apache/kafka/pull/17781#discussion_r1851151511
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -662,17 +662,19 @@ void setGroupAssignmentSnapshot(final Set<TopicPartition>
partitions) {
@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));
+ } else {
+ log.debug("Metric {} already registered consumer metric",
metric.metricName());
}
}
@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));
+ } else {
+ log.debug("Metric {} is a standard consumer metric, won't
unregister", metric.metricName());
Review Comment:
```suggestion
log.debug("Skipping unregistration for metric {}. Existing
consumer metrics cannot be removed.", metric.metricName());
```
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -662,17 +662,19 @@ void setGroupAssignmentSnapshot(final Set<TopicPartition>
partitions) {
@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));
+ } else {
+ log.debug("Metric {} already registered consumer metric",
metric.metricName());
Review Comment:
```suggestion
log.debug("Skipping registration for metric {}. Existing
consumer metrics cannot be overwritten.", metric.metricName());
```
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