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"records-lead-min"

Also, add per-partition lead metrics metric to KafkaConsumer. The metric names name would be:

"TOPIC-PARTITION_ID.records-lead"
"TOPIC-PARTITION_ID.records-lead-avg"
"TOPIC-PARTITION_ID.records-lead-min"

The way to get the metrics is the same as getting other metrics. For example:

Code Block
languagejava
TopicPartition tp = new TopicPartition("topic", 0);
HashMap<String, String> tags = new HashMap<>();
tags.put("client-id", "metricTestConsumer0");

double currentLead = kafkaConsumer.metrics().get(new MetricName(tp + ".records-lead", "consumer-fetch-manager-metrics", "", tags)).value()
double averageLead = kafkaConsumer.metrics().get(new MetricName(tp + ".records-lead-avg", "consumer-fetch-manager-metrics", "", tags)).value()
double minLeadtags.put("topic", tp.topic());
tags.put("partition", String.valueOf(tp0.partition());

double currentLead = kafkaConsumer.metrics().get(new MetricName(tp + ".records-lead-min", "consumer-fetch-manager-metrics", "", tags)).value()

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