...

With this KIP, these metrics will also emit topic names without any modification to periods, matching the producer naming scheme. New consumer-fetch-manager-metrics will not have replaced dot (.) in topic names. "However for backward compatibility, the period replaced metrics will also be emitted. They are now deprecated and shall will be deprecated removed in a future major Kafka version (5.0)."

Proposed Changes

• Add additional metric without periods replacement in Consumer Metrics Topic Names:

  • If topic contains period (.), add metrics with same name in the Kafka consumer metrics to preserve the topic names as they are, without replacing periods with underscores. Keep emitting the existing period replaced metrics as well for backward compatibility.
  • If topic doesn't contain period (.), no change to existing metrics. 

...