Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/4769#discussion_r145565821 --- Diff: flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/internals/AbstractFetcher.java --- @@ -543,6 +544,18 @@ private void updateMinPunctuatedWatermark(Watermark nextWatermark) { // ------------------------- Metrics ---------------------------------- /** + * Register offset metrics. + */ + protected MetricGroup registerOffsetMetrics(MetricGroup metricGroup) { + if (useMetrics) { + MetricGroup kafkaMetricGroup = metricGroup.addGroup("KafkaConsumer"); + addOffsetStateGauge(kafkaMetricGroup); + return kafkaMetricGroup; + } + return new UnregisteredMetricsGroup(); --- End diff -- actually, we could also just return the input metric group.
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