Mickael Maison created KAFKA-19168:
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Summary: MirrorMaker kafka_metrics_count metric is always incorrect
Key: KAFKA-19168
URL: https://issues.apache.org/jira/browse/KAFKA-19168
Project: Kafka
Issue Type: Improvement
Reporter: Mickael Maison
Each MirrorMaker task creates its own Metrics instance without passing any
tags. While most metrics created by tasks won't collide because they have tags
for a specific topic partition or group, the kafka_metrics_count, which is
always created, always collide.
So for example if you run 2 MirrorSourceConnector tasks, the
kafka.connect.mirror:type=kafka-metrics-count metric is set to 13, while
there's actually 26 metrics, 13 for each task.
Instead each task should provide tags (its name and index) so we get a
kafka.connect.mirror:type=kafka-metrics-count metric per task.
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