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Table of Contents

Status

Current state: Under DiscussionAccepted

Discussion thread: here

JIRA:here KAFKA-6184

Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).

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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-avgmin"

"TOPIC-PARTITION_ID.records-lead-minavg"

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

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

double currentLeadcurrentPartitionLead = kafkaConsumer.metrics().get(new MetricName(tp + ".records-lead", "consumer-fetch-manager-metrics", "", tags)).value();
double averageLeadcurrentPartitionMinLead = kafkaConsumer.metrics().get(new MetricName(tp + ".records-lead-avgmin", "consumer-fetch-manager-metrics", "", tags)).value();
double minLeadcurrentPartitionAvgLead = kafkaConsumer.metrics().get(new MetricName(tp + ".records-lead-minavg", "consumer-fetch-manager-metrics", "", tags)).value();

When the consumer does not own a partition anymore, the lead metric all lead metrics including client-level and partition-level ones will be removed.

Compatibility, Deprecation, and Migration Plan

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