Kafka Streams metrics for tasks and threads etc, are not being exposed correctly

[davidgammon-mettle]

Expected Behavior

I should be able to see distinct metrics for something like process-rate for threads and tasks etc. For example:

• kafka-streams.thread.process-rate
• kafka-streams.task.process-rate

Actual Behaviour

There is only a single metric for process-rate:

• kafka-streams.process-rate

It looks like it is being overwritten by the last metric to be registered (or possibly the first).

Steps To Reproduce

1. All
2. Kafka Streams metrics enabled
3. Run application an view Kafka Streams metrics
4. Only a single metric exists

Specifically it's an issue with this line of code. The name is not unique and needs to include the group in some form. For example:
name = kafkaMetric.metricName().group() + "." + kafkaMetric.metricName().name();

This results in these metrics (some further parsing maybe required to normalise):

1. kafka-streams.stream-processor-node-metrics.process-rate
2. kafka-streams.stream-task-metrics.process-rate
3. kafka-streams.stream-thread-metrics.process-rate

Environment Information

NA

Example Application

No response

Version

5.7.0